clark sonic flow general

DESCRIPTIONThe CS-EM is an economical energy flow monitor intendedfor applications in energy transfer and heating/cooling sys-tems where energy use requires measurement.

The CS-EM internally calculates the energy passing throughthe system. The energy used is calculated based on the themass volume of liquid passing through the system and thedifference in temperature between the supply and returnlines. The volume of liquid is measured by means of a pulsegenerating Clark ultrasonic flow transmitter. A RTD sensorbuilt into the flowmeter (T1) measures temperature at themeter and the remote temperature (T2) is measured bymeans of a precision RTD sensor mounted in the return pipe.

A scaled pulse output is provided and can be configured toreport volume flow rate, mass flow rate or energy total.Modbus 485 communications provides an interface with abuilding automation or monitoring system.

The unit contains non-volatile memory that records flow andenergy, and is updated every ten minutes. However, when flow, mass or energy totals are read, thereported values are true current values; the last stored value is added to the current accumulatedvalue when the applicable register is read.

The default medium for the CS-EM is water. Other media con-sisting of water and a certain percentage of glycol up to 30% can be field configured.

www.clarksol.com

CS-EM BTU/Energy MonitorEnergy Monitoring of Heating or Cooling Systems, 3/4” to 10” Pipe

Clark Solutions 10 Brent Drive Hudson, MA 01749 Tel. 978 / 568 3400 Fax 978 / 568 0060

SPECIFICATIONSTEMPERATURE MEASUREMENTRTD integral to Flow Transmitter:

Sensor: 100 Ohm Platinum RTD Element ( Alpha= 0.00385)Accuracy: ±0.06%at 0oC

Remote RTD Assembly:Clark Spring-Loaded RTD Thermowell Assemblies with General Purpose AluminumConnection Heads are designed for use with, and supplied with, Clark 316 SS thermowells. This design allows 1/4” spring compression to ensure positivecontact with the bottom of the thermowell.

Sensor: 100 Ohm Platinum RTD Element ( Alpha= 0.00385)Accuracy: ±0.06%at 0oCSheath material & Diameter: 316 SS, 1/4” dia.Element Connection: 3 wire, screw terminalConnection to Energy Monitor: 10 ft connecting RTD cable supplied witheach model. Cable installed at monitor end via water tight strain relief fittingand electrical connector.Head Mounting Fittings: 316 SS, 1/2” x 1/2” NPT hex nipple, 1” lengthHead & Sheath Termonation: Aluminum screw cover head, 3/4” NPT conduit

connectionSizes: See model & dimension chart

THERMOWELLMaterial: 316L SSPipe Conection: 3/4” NPTDimensions: See Table 1 below

APPLICATIONS

• HEATING ONLY APPLICATION

• COOLING ONLY APPLICATION

• HEAT RECOVERY APPLICATIONS

• CONDENSATE RECOVERY APPLICATIONS

• EFFICIENCY MEASURING/VERIFICATION

• SOLAR AND GEOTHERMAL SYSTEMS


Remote RTD Model & Thermowell Dimension Chart

Model For Pipe SizesSee

FigureS U

19-0273/4”. 1”. 1-1/2” &

2”1 - -

19-028 3” & 4” 2 4” 2-1/2”

19-029 6” & 8” 2 6” 4-1/2”

19-030 10” 2 9” 7-1/2”

Figure 2

Figure 1Table 1

FLOW TRANSMITTER WITH RTD SENSOR & INTEGRATED ELECTRONICS FOR ENERGY CALCULATIONS

DESCRIPTIONClark Sonic ultrasonic flow transmitters are ideal for measure-ment of flow rates of acoustically conductive liquids includingmost clean liquids and many liquids with entrained solids.They are ideal for monitoring flow rate and temperature inheat exchange applications. When used in energy measure-ment applications the transmitters are typically supplied witha built-in platinum 100 Ohm RTD temperature sensor to moni-tor the processs temperature.

Main advantages include excellent long term stability, no pressure drop, broad fluid compatibility, highaccuracy and low cost. Also, there are no moving parts.

At the heart of the transmitter is a proprietary mixed signal ASIC which allows sophisticated timing, con-trol and transducer drive circuitry to be combined on a single integrated circuit.

The ASIC uses a special algorithm that is an improvement upon the standard single-path measurementtechnique. Using the “sing around” method, the ultrasonic transducer alternates between transmittingand receiving to measure differences in flight time between upstream and downstream transmissions. Asound pulse is transmitted from an upstream transducer towards a downstream transducer like a tradi-tional time-of-flight measurement. However, the received sound pulse then triggers a second downstreamtransmission, that then triggers a third and so on for a specific number of cycles. This process is repeated inthe upstream direction.

Because it takes an average flight time over multiple cycles to compute the difference in flight times, theapproach yields a significant improvement in timing accuracy when compared with the time-of -flight dif-ference of a single sound pulse in each direction. This algorithm, combined with the pico-second timingresolution of the ASIC, provides the precise time measurement capability necessary for compact, smalldiameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temperature, density and viscosity as theflow calculation is independent of the speed of sound.


SPECIFICATIONSGENERALFlow Range: Bi-directional, per “Standard Models”

tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User Selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to

1200 kg/m3)Max. Working Pressure:

3/4” to 3”:250 PSI (17.2 bars)4” to 10”: PerASME 150 flange specification

Pipe Sizes: 3/4”, 1”, 1 1/2”, 2”, 3”, 4”, 6”. 8”, 10”Pipe Connections:See Model Tables 2 & 3

Sizes 3/4” to 2”- Female NPT, BSP Size 3” to 10”: ASME 150 Flange

Electrical Enclosure: Integral to Body casting with gasketed cover; One 1/2” NPT conduit connection and one M16 x 1.5 connection (used for remote RTD)

Enclosure Rating: NEMA 4 (IP 65)Power Supply Voltage: 18 to 36 VDC

WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBodyMaterial:

3/4” to 3”:Brass (UNS C83600)4” to 8”: Schedule 40, epoxy coated, carbon steel

pipeOUTPUTPulse Output: Can be factory set or field configuredto report volume flow rate, mass flow rate or energytotal. Output is an optically isolated NPN transistorwith maximum sinking capability to 25 mA from a volt-age source of no more than 48 VDC. Pulse duration is 2 ms when reporting flow rate and 10 mswhen reporting energy total (consult factory for different pulse duration)Wiring Connection: 10 ft shielded 3-conductor plenum cable for

RS-485 10 ft shielded 4-conductor plenum cable for power & pulse output. Liquidtight 1/2” non-metalic conduit connector

supplied for RS-485 & Power & Pulse cables

Model Pipe Size/Thread Size Full Scale Ranges (GPM)

Min. Max. Pulses/gallon

Full Scale Ranges (LPM)

Min. Max. Pulses/literCS-EMB34 3/4” NPT or BSP 0.38 25 1200 1.50 100 360CS-EMB10 1.0” NPT or BSP 0.75 50 600 3.00 200 160CS-EMB15 1.50” NPT or BSP 1.20 80 375 4.50 300 85CS-EMB20 2.0” NPT or BSP 1.80 120 200 6.8 455 50

CS-EMB303”ASME Class 150 Flange

80 mm DIN Class 150 Flange6.00 400 75 23.0 1500 20

STANDARD MODELS- 3/4” TO 3”

STANDARD MODELS- 4” TO 10”

ModelPipeSize

Full Scale Ranges (GPM)



Min. Max. Pulses/liter

CS-EMC4 4” 7.5 500 60 29 1900 16CS-EMC6 6” 18 1200 25 68 4500 7CS-EMC8 8” 30 2000 15 114 7600 4CS-EMC10 10” 45 3000 10 165 11000 3

Table 2

Table 3

FIELD REPLACEABLE TRANSDUCER FOR 4” TO 10” SIZES

Two opposing CS-EMC ultrasonic transducers are inserted into fixed ULTEM®

drywells and held in place with light spring force. A locating keyway in thedrywell aids insertion and positioning of the transducers. In the event of fieldfailure of a transducer, replacement is straightforward and can be accom-plished without removing the pipe spool and shutting down the process.

The electrical PC board can also be field replaced. Calibration factor and otherspecific information are maintained at the factory for all transmittersshipped.

Transducer Components

1 Spring Retainer

2 Spring

3 Clamp

4 Bushing

5 Drywell

6 Ultrasonic Transducer

Data types: Word, DoubleData is sent “Big Endian”, i.e. most significant

byte first.

Flow and energy data updated every 2 seconds.Turn around time is less than 2 seconds.Since the data

is updated every 2 seconds, reading data at intervals greater than the update time will ensurethat current values will always be fresh.

Commissioning:The CS-EM requires no special software to set the

desired communication parameters. It can be done atthe factory or from the user’s Modbus Master overthe RS-485 network. Standalone commissioning canbe done via PC serial port (model 485SD9TB, RS-485converter required). Commissioning software can bedownloaded from our website, www.clarksol.com.


Energy Measurement: T1 RTD is located in the flow sensorT2 Remote RTD is installed in a return pipe.

Heating and cooling energy are both measured andtotaled in separate registers in model CS-EM. Thevalues can be interrogated via the Modbus Master.

1) Heating Mode: T1>T2 2) Cooling Mode: T2>T1

The energy total pulse output functions in theabsolute mode, indifferent as to whether in the heating or cooling mode. Modbus Operability:

Baud Rate: 9600 (default) or 19.2 KB/SParity: Selectable, None (default), Even, Odd Slave Id: 01-255 (default is 01)Function Codes: 03, 05 & 06 are supportedException Codes: 01, 02 & 03 are supported

VariableRegisterNumber

#Registers

FunctionCode

DataType

Description

FLOW RATE 40001 2 03 Double RETURNS FLOW RATE IN SELECTED UNITS

ENERGY RATE 40003 2 03 Double RETURNS ENERGY RATE IN SELECTED UNITS

MASS RATE 40005 2 03 Double RETURNS MASS FLOW RATE IN SELECTED UNITS

FLOW TOTAL 40007 2 03 Double RETURNS TOTAL FLOW IN SELECTED UNITS SINCE LAST RESET

HEATING TOTAL 40009 2 03 Double RETURNS TOTAL HEAT ENERGY IN SELECTED UNITS SINCE LAST RESET

COOLING TOTAL 40011 2 03 Double RETURNS TOTAL COOLING ENERGY IN SELECTED UNITS SINCE LAST RESET

MASS TOTAL 40013 2 03 Double RETURNS TOTAL MASS IN SELECTED UNITS SINCE LAST RESET

LOCAL TEMP 40015 2 03 Double RETURNS LOCAL TEMPERATURE IN SELECTED UNITS

REMOTE TEMP 40017 2 03 Double RETURNS REMOTE TEMPERATURE IN SELECTED UNITS

Table 4- Read Data Registers


#Registers

FunctionCode

DataType

Description

SET FLOW RATE UNITS 40101 1 06 WORD UNITS OF FLOW RATE; 0 = G/M, 1 = L/M, 2 = L/SEC

SET ENERGY RATE UNITS 40102 1 06 WORD UNITS OF ENERGY RATE; 3 = BTU/M, 4 = KBTU/M, 5 = KBTU/HR, 6 = KW

SET MASS FLOW RATE UNITS 40103 1 06 WORD UNITS OF MASS RATE; 7 = LBS/MIN, 8 = KG/MIN

SET FLOW TOTAL UNITS 40104 1 06 WORD FLOW TOTAL UNITS; 9 = GALS, 10 = LITERS, 11 = CUBIC METERS

SET ENERGY TOTAL UNITS 40105 1 06 WORD ENERGY TOTAL UNITS; 12 = kBTU, 13 =W-HRS, 14 = KW-HRS

SET MASS TOTAL UNITS 40106 1 06 WORD MASS UNITS; 15 = LBS, 16 = KG

SELECT PULSE OUTPUT 40107 1 06 WORD SELECT ENERGY,FLOW,OR MASS AS PULSE OUTPUT; 0 = FLOW, 1 = ENERGY, 2 = MASS

SELECT TEMPERATURE UNITS 40108 1 06 WORD SELECT DEG F OR DEG C; 0 = DEG F, 1 = DEG C

SET % ETHYLENE GLYCOL 40109 1 06 WORD ENTER VALUE 0-30

SET % PROPYLENE GLYCOL 40110 1 06 WORD ENTER VALUE 0-30

Table 5- Setup Functions, Write Data Registers

FunctionRegisterNumber

#Registers

FunctionCode

DataType

Description

*SET SLAVE ID 40201 1 06 WORD 01 IS FACTORY SET 0 to 255; *Can only be set when commissioning

*BAUDRATE 40202 1 06 WORD 19.2 KB 0R 9600 (DEFAULT) 0 = 9600, 1 = 19.2kb; *Can only be set when commissioning

*SET PARITY 40203 1 06 WORD NONE, ODD, EVEN (DEFAULT) 0,1,2; *Can only be set when commissioning

RESET FLOW TOTAL 00001 1 05 WORD CLEARS TOTALIZED FLOW

RESET HEATING ENERGY TOTAL 00002 1 05 WORD CLEARS TOTALIZED HEATING ENERGY

RESET COOLING ENERGY TOTAL 00003 1 05 WORD CLEARS TOTALIZED COOLING ENERGY

RESET MASS TOTAL 00004 1 05 WORD CLEARS TOTALIZED MASS

SET DEFAULT UNITS 00005 1 05 WORD RESET ALL UNITS TO FACTORY DEFAULTS

Table6- Commissioning & Other Functions, Write Data Registers

Size/ConnectionA B C D E

Inches mm Inches mm Inches mm Inches mm Inches mm

3” ASME 150 11.00 - Ø 7.50 - 3.16 - 6.50 - 2.50 -

80 mm DIN 16 - 280 - 190 - 84.00 - 165 - 63.50

Pipe sizes 3/4” to 2”3” Pipe, ASME 150 Flange or DIN 16

DIMENSIONS - 3/4” TO 3”

Table 7


4-10” Schedule 40 Carbon Steel Pipe, ASME 150 Flange

PipeSize

Dimensions (Inches)

A B C D E FBolt CircleDiameter

Number ofHoles

4” 13.00 9.00 4.00 6.54 2.62 0.75 7.50 8

6” 16.00 11.00 5.09 6.54 2.62 0.88 9.50 8

8” 18.00 13.50 6.11 6.54 2.62 0.88 11.75 8

10” 22.00 16.00 7.18 6.54 2.62 1.00 14.25 12

Table 8

DIMENSIONS- 4” TO 10”



3/4” & 1” 9.20 234 1.62 41.10 2.06 52.30 6.40 163 2.40 61.00

1-1/2” & 2” 9.88 251 2.75 69.90 2.51 63.80 6.40 163 2.40 61.00

Commissioning from a personal computer is straightforward with Clark commissioning software. Download from our website at www.clarksol.com. Requires model 43-119, RS 485 converter.


ELECTRICAL

Pulse Output Wiring

Optional Model 43-119, RS-485 Converter for

Commissioning from a PC:PC End: DB9 FemaleRS-485 End: Terminal Block

Terminal Block Connectionsto DN-EM:

Black: TD(A)-Red: TD(B)+Clear or Green: Gnd(Green)

RS-485: 3-conductor cableRed: TXD1Black: TXDOGreen or Clear: GND

Power & Pulse Out: 4-conductor cableRed (+): Vin 12 to 30 VDCBlack (-): Vin ReturnGreen : OPTO NPN CWhite: OPTO NPN E

3/4” TO 3” ENERGY METER ORDERING INFORMATIONORDER NUMBER (ABCD)Example: CS-EM10NER-20FS

AModel

BPipe Thread

CTransducer Seal

DOptions

CS-EMB34CS-EMB10CS-EMB15CS-EMB20CS-EMB30

3/4” to 2”N= Female NPT

B=Female British Standard Pipe (G)3”

A= ASME Class 150 FlangeD= DIN Class 16 Flange

E= EPDMB= Buna-N

N= Neoprene®

V= FKM

R- (Specify Length In Feet)= Remote RTD cable Length other than standard 10 ft

FS= Factory Non-Default Configuration (fill out CS-EM Configuration Sheet)

ULTEM® is a registered trademark of The General Electric CompanyNeoprene® is a registered trademark of DuPont Dow

4” TO 10” ENERGY METER ORDERING INFORMATIONORDER NUMBER (ABCDEF)Example: CS-EMC4E

AModel

BTransducer Seal

COptions

CS-EMC4CS-EMC6CS-EMC8CS-EMC10

E= EPDMB= Buna-N

N= Neoprene®

V= FKM

R- (Specify Length In Feet)= Remote RTD cable Length other than standard 10 ft

FS= Factory Non-Default Configuration (fill out CS-EM Configura-tion Sheet)

Table 9

Table 10

Accessory Item Description

RT-3-502 RTD cable, 1 ft, three conductor , 22 guage stranded tinned, PVC insulation, red, red, white; outer insulation color white, temp rating 221oF

43-119 RS-485 Converter for Commissioning from a PC

ORDERING INFORMATION1) SELECT REMOTE TEMPERATURE SENSOR FROM TABLE 12) SELECT FLOW/ENERGY MONITOR FROM TABLES 6 OR 7

DESCRIPTIONModel CS-EM is suplied with a default setup configuration. The setup can be changed in the field (see DN-EMinstallation manual) or configured at the factory according to customer requirements.

Fill out the form fields below if you require the factory to provide a non-default configuration set at the factoryprior to shipment.

www.clarksol.com

Model CS-EM BTU/Energy MonitorFactory Configuration Sheet


Selection(Mark non-

default selectionwith an X)

Pulse Output(Pulse per unit of energy or frequency output

proportional to flow rate)

- Pulse every 1 Btu (Btu)

Pulse every 1000 (kBtu)

Pulse every 1 Watt-Hr

Pulse every KW-Hr

Flow Rate (units selected step 3)

Selection(Mark non-default selection

with an X)Baud Rate

- 9600

19.2 KB/S

Parity

- None

Even

Odd

Slave ID

- 01

02-255 (Specify)

General InformationProvide Values

Liquid

- Water

% Ethylene Glycol

% Propylene Glycol

Other

Maximum System Pressure

Maximum Flow Rate

Design Supply Temperature

Design Return Temperature

Date:Reference Purchase Order:

Item No., Model No. On P.OCompany Name:

Address:

Contact:Tel:

E-Mail:

Selection(Mark

with an X)

Units of Measurement

Flow Rate

- Gal/Min

Liters/Min

Liters/SecMass Flow

- Lbs/Min

KG/MinEnergy Rate

- BTU/Min

kBTU/Min

kBTU/Hr

KWTotal Flow- Volume- Gallons

Liters

Cubic Meters

Total Flow- Mass

- LBS

KGTotal Energy

- kBTU

W-HRS

KW-HRSTemperature

- oFoC

Factory Default Preset Values are In Bold

1) Please give us somegeneral information.

2) Provide system setupinformation.

3) Select units of measurement.

4) Select pulse outputconfiguration.

DESCRIPTIONThe DN-EM is an economical energy flow monitorintended for applications in energy transfer and heat-ing/cooling systems where energy use requires measurement.

The DN-EM internally calculates the energy passingthrough the system. The energy used is calculated basedon the the mass volume of liquid passing through thesystem and the difference in temperature between thesupply and return lines. The volume of liquid is measuredby means of a pulse generating Clark vortex flow transmitter. A RTD sensor built into the flowmeter (T1)measures temperature at the meter and the remote temperature (T2) is measured by means of a precision RTDsensor mounted in a pipe tee.

A scaled pulse output is provided and can be configuredto report volume flow rate, mass flow rate or energytotal. Modbus 485 communications provides an interfacewith a building automation or monitoring system.

The unit contains non-volatile memory that records flowand energy, and is updated every ten minutes. However,when flow, mass or energy totals are read, the reportedvalues are true current values; the last stored value isadded to the current accumulated value when the applicable register is read.

The default medium for the DN-EM is water. Other mediaconsisting of water and a certain percentage of glycol up to 30% can be field configured.

www.clarksol.com

Model DN-EM BTU/Energy MonitorEnergy Monitoring of Heating or Cooling Systems, 1/2” & 3/4” Pipe


APPLICATIONS

• HEATING & COOLING LOOPS

• HEAT RECOVERY APPLICATIONS

• CONDENSATE RECOVERY APPLICATIONS

• EFFICIENCY MEASURING/VERIFICATION

• SOLAR AND GEOTHERMAL SYSTEMSSPECIFICATIONSMedium: Suitable for water & water glycol basedheat exchange systems and other liquids compatiblewith the materials of construction (consult factory).For media with viscosity greater than 2 millipascal sec-onds (2 centipoise), higher flow rates are required toform vortices raising the minimum measurable flowrate value. Flow ranges: From 0.9 to 22.5 GPM, See Table 1Temperature measurement: 3-wire,1000 Ohm RTD per IEC751, Class B

1 RTD imbedded in flow sensor 1 RTD packaged in a 1/4” x 4” stainless steel

sheath with 1/2” NPT brass adjustable compression fitting for mounting in a 1/2” or 3/4” pipe Tee; supplied connected to energy monitor with 10 ft of 3-wire RTD cable.Pipe Tee is an ordering option, see Table 8

Temperature: Ambient: 5o to185oF (–15o to +85°C)In storage: -22o to 185oF (–30o to +85°C)

Max. pressures and liquid temperature: See table 2

Max. test pressure: 261 psi/18 bar at 104oF/40 °CLoss of pressure / cavitation: A minimum inlet pressure of 10.2 psi (0.7 bars) is required to avoidcavitation issues at maximum flow.Wetted materials:Flow sensor and bluff:

ASTM- PPA, PolyphthalamideISO-PA6T/6I, Grivory 40%GF

Sensor vane: ETFE Sealing material: EPDMFlow Accuracy:

Up to 50% fs: < 1% fs From 50% fs: < 2% of measured value

Temperature measurement accuracy:PT 1000 per DIN EN 60751 Class B

± 0.8oF @ 68oF (± 0.45°C @ 20°C)± 1.4oF @ 190oF (± 0.75°C @ 90°C)

Protection class: NEMA 4X (IP65)Mounting position: Flow direction is identified byan arrow on flowmeter body. Otherwise theflowmeter mounting orientation is universal.

psi bar oF oC Duration174 12 104 40 Lifetime100 6.89 200 93.3 Lifetime87 6 212 100 Lifetime58 4 257 125 600 hours58 4 284 140 2 hours

Table 1- Models

ModelPipeSize

Full Scale Range

(Gal/min)

Full Scale Range (l/min)

Max. Pressure Drop(PSI)

DN-EM-15 1/2” 0.90 to 13.20 3.5 to 50.02.9

DN-EM-20 3/4” 1.30 to 22.50 5.0 to 85.0

Table 2- Maximum Operating Pressure & Temperature


Units of Measurement: Factory set or Field programmable

Flow Rate: Gals/Min, Liters/Min, Liters/SecMass Flow: Lbs/Min, Kgs/MinEnergy Rate: BTU/Min, kBTU/Min, kBTU/Hr,

KWTotal Flow: Gals, Liters, Cubic MetersTotal Energy: kBTU, KW-HRSTemperature: oF, oC

Output Update Rate: 2 secondsPower: 12 to 30 VDCCurrent Consumption: < 8 mAPulse Output: Can be factory set or field configuredto report volume flow rate, mass flow rate or energytotal. Output is an optically isolated NPN transistorwith maximum sinking capability to 25 mA from avoltage source of no more than 48 VDC. Pulse duration is 2 ms when reporting flow rate and 10 mswhen reporting energy total (consult factory for different pulse duration)Energy Measurement:

T1 RTD is located in the flow sensorT2 Remote RTD is installed in a pipe Tee

Heating and cooling energy are both measured andtotaled in separate registers in model DN-EM. Thevalues can be interrogated via the Modbus Master.

1) Heating Mode: T1>T2 2) Cooling Mode: T2>T1

The energy total pulse output functions in theabsolute mode, indifferent as to whether in the heating or cooling mode.

Modbus Operability:Baud Rate: 9600 (default) or 19.2 KB/SParity: Selectable, None (default), Even, Odd Slave Id: 01-255 (default is 01)Function Codes: 03, 05 & 06 are supportedException Codes: 01, 02 & 03 are supportedData types: Word, DoubleData is sent “Big Endian”, i.e. most significant

byte first.Flow and energy data updated every 2 seconds.Turn around time is less than 2 seconds.Since the data

is updated every 2 seconds, reading data at intervals greater than the update time will ensurethat current values will always be fresh.

Commissioning:The DN-EM requires no special software to set the

desired communication parameters. It can be done atthe factory or from the User’s Modbus Master overthe RS-485 network. Stand alone commissioning canbe done via PC serial port (model 43-119, RS-485 con-verter required). Commissioning software can bedownloaded from our website, www.clarksol.com.Wiring Connection: 10 ft shielded 3-conductor plenum cable for

RS-485 10 ft shielded 4-conductor plenum cable for

power & pulse output. Liquidtight 1/2” non-metalic conduit connector

supplied for cable entry to enclosurePipe Connections: 304 Stainless Steel threaded

adaptors or brass solder adaptors, see tables 6&7.


#Registers

FunctionCode

DataType

Description

FLOW RATE 40001 2 03 Double RETURNS FLOW RATE IN SELECTED UNITS

ENERGY RATE 40003 2 03 Double RETURNS ENERGY RATE IN SELECTED UNITS

MASS RATE 40005 2 03 Double RETURNS MASS FLOW RATE IN SELECTED UNITS

FLOW TOTAL 40007 2 03 Double RETURNS TOTAL FLOW IN SELECTED UNITS SINCE LAST RESET

HEATING TOTAL 40009 2 03 Double RETURNS TOTAL HEAT ENERGY IN SELECTED UNITS SINCE LAST RESET

COOLING TOTAL 40011 2 03 Double RETURNS TOTAL COOLING ENERGY IN SELECTED UNITS SINCE LAST RESET

MASS TOTAL 40013 2 03 Double RETURNS TOTAL MASS IN SELECTED UNITS SINCE LAST RESET

LOCAL TEMP 40015 2 03 Double RETURNS LOCAL TEMPERATURE IN SELECTED UNITS

REMOTE TEMP 40017 2 03 Double RETURNS REMOTE TEMPERATURE IN SELECTED UNITS

Table 3- Read Data Registers


#Registers

FunctionCode

DataType

Description

SET FLOW RATE UNITS 40101 1 06 WORD UNITS OF FLOW RATE; 0 = G/M, 1 = L/M, 2 = L/SEC

SET ENERGY RATE UNITS 40102 1 06 WORD UNITS OF ENERGY RATE; 3 = BTU/M, 4 = KBTU/M, 5 = KBTU/HR, 6 = KW

SET MASS FLOW RATE UNITS 40103 1 06 WORD UNITS OF MASS RATE; 7 = LBS/MIN, 8 = KG/MIN

SET FLOW TOTAL UNITS 40104 1 06 WORD FLOW TOTAL UNITS; 9 = GALS, 10 = LITERS, 11 = CUBIC METERS

SET ENERGY TOTAL UNITS 40105 1 06 WORD ENERGY TOTAL UNITS; 12 = kBTU, 13 =W-HRS, 14 = KW-HRS

SET MASS TOTAL UNITS 40106 1 06 WORD MASS UNITS; 15 = LBS, 16 = KG

SELECT PULSE OUTPUT 40107 1 06 WORD SELECT ENERGY,FLOW,OR MASS AS PULSE OUTPUT; 0 = FLOW, 1 = ENERGY, 2 = MASS

SELECT TEMPERATURE UNITS 40108 1 06 WORD SELECT DEG F OR DEG C; 0 = DEG F, 1 = DEG C

SELECT MEDIA TYPE 40109 1 06 WORD 0 =WATER, 1,(2) = ETHYLENE GLYCOL 92% (95.5%), 2(3) = PROPLENE GLYCOL 94% (96%)

SET % GLYCOL 40110 1 06 WORD ENTER PERCENT ADDED , 10 TO 60

Table 4- Setup Functions, Write Data Registers

FunctionRegisterNumber

#Registers

FunctionCode

DataType

Description

*SET SLAVE ID 40201 1 06 WORD 01 IS FACTORY SET 0 to 255; *Can only be set when commissioning

*BAUDRATE 40202 1 06 WORD 19.2 KB 0R 9600 (DEFAULT) 0 = 9600, 1 = 19.2kb; *Can only be set when commissioning

*SET PARITY 40203 1 06 WORD NONE, ODD, EVEN (DEFAULT) 0,1,2; *Can only be set when commissioning

RESET FLOW TOTAL 00001 1 05 WORD CLEARS TOTALIZED FLOW

RESET HEATING ENERGY TOTAL 00002 1 05 WORD CLEARS TOTALIZED HEATING ENERGY

RESET COOLING ENERGY TOTAL 00003 1 05 WORD CLEARS TOTALIZED COOLING ENERGY

RESET MASS TOTAL 00004 1 05 WORD CLEARS TOTALIZED MASS

SET DEFAULT UNITS 00005 1 05 WORD RESET ALL UNITS TO FACTORY DEFAULTS

Table 5- Commissioning & Other Functions, Write Data Registers

DIMENSIONS (INCHES)

Dimensions do not include pipe fittings. See tables 3 & 4 for standard

fitting offerings.

The DN-EM offers great flexibility with respect to piping connections. Inserting and removing fittings is easy. A clip secures the end fitting to the flow sensor and an o-ring provides the seal.

Fitting Kit P/N(Includes 2 Clips,

2 O-rings & 2 Adaptors)

Clip Part

Number

O-RingPart Number

(Material)

ThreadedAdapter

Part NumberMaterial A

Binches(mm)

Cinches(mm)

Dinches(mm)

Einches(mm)

Finches(mm)

ginches(mm)

Hinches(mm)

KADS1/2 C15R15E

(EPDM)ADS1/2 303 SS 1/2” NPT 1.97 (50.05) 2.64 (67.05) 0.646 (16.4) 1.260 (32)

1.1(28)

0.191(4.85)

1.36(34.5)

KADS3/4 C20R20E

(EPDM)ADS3/4 303 SS 3/4” NPT 2.32 (58.85) 3.36 (85.25) 0.731(18.6 ) 1.499 (37.8)

1.1(28)

0.315(8)

1.36(34.5)

Table 6- Stainless Threaded Adaptors (1/2”& 3/4” NPT)

PIPE ADAPTORSStainless Adaptors


Commissioning from a personal computer is straightforward with Clark commissioning software. Download from our website at www.clarksol.com. Requires model 43-119, RS 485 converter.


ORDERING INFORMATION

Model Description

DN-EM-15-KADS1/2Energy Meter with 1/2” NPT Stainless Steel End Connections,

O-rings and Clips (Shipped Assembled)

DN-EM-15-KADS3/4Energy Meter with Brass Solder Fittings for 1/2” Copper Pipe(Fittings, Mounting Clips & O-rings Supplied Unassembled)

DN-EM-20-KSADB1/2Energy Meter with 3/4” NPT Stainless Steel End Connections,


DN-EM-20-KSADB3/4Energy Meter with Brass Solder Fittings for 3/4” Copper Pipe(Fittings, Mounting Clips & O-rings Supplied Unassembled)

43-119 PC Serial Port to RS-485 converter

43-122 Solder Joint Brass Pipe Tee, 1/2 “ Pipe x 1/2” NPT Branch

43-123 Solder Joint Brass Pipe Tee, 3/4 “ Pipe x 1/2” NPT Branch

43-125 Solder Joint Brass Union, 1/2 “

43-126 Solder Joint Brass Union, 3/4 “

Model DescriptionADS1/2 1/2” NPT SS Adaptor

ADS3/4 3/4” NPT SS Adaptor

SADB1/2 1/2” Brass Solder Adaptor


C15 Clip

C20 Clip

R15E EPDM O-ring

R20E EPDM O-ring

ELECTRICAL

Pulse Output Wiring

Optional Model 43-119, RS-485 Converter for

Commissioning from a PC:PC End: DB9 FemaleRS-485 End: Terminal Block

Terminal Block Connectionsto DN-EM:

Black: TD(A)-Red: TD(B)+Clear or Green: Gnd(Green)

RS-485: 3-conductor cableRed: TXD1Black: TXDOGreen or Clear: GND

Power & Pulse Out: 4-conductor cableRed (+): Vin 12 to 30 VDCBlack (-): Vin ReturnGreen : OPTO NPN EWhite: OPTO NPN C

Brass Solder Adaptors

SADB3/4 SADB1/2

Table 7- Brass Solder AdaptorsFitting Kit P/N

(Includes 2 Clips, 2 O-rings &2 Brass Adaptors)

Clip Part

Number

O-RingPart Number

(Material)

AdapterPart

NumberMaterial

Standard Tubing Size(For Use WithType K & Type LCopper

KSADB1/2 C15 R15E(EPDM) SADB1/2 360 Brass 1/2”

KSADB3/4 C20 R20E(EPDM) SADB3/4 360 Brass 3/4”

Table 8


DESCRIPTIONModel DN-EM is suplied with a default setup configuration. The setup can be changed in the field (see DN-EMinstallation manual) or configured at the factory according to customer requirements.

Fill out the form fields below if you require the factory to provide a non-default configuration set at the factoryprior to shipment.

www.clarksol.com

Model DN-EM Configuration SheetFactory Configuration Sheet

Selection(Mark non-

default selectionwith an X)

Pulse Output(Pulse per unit of energy or frequency output

proportional to flow rate)

- Pulse every 1 Btu (Btu)

Pulse every 1000 (kBtu)

Pulse every 1 Watt-Hr

Pulse every KW-Hr

Flow Rate (units selected step 3)

Selection(Mark non-default selection

with an X)Baud Rate

- 9600

19.2 KB/S

Parity

- None

Even

Odd

Slave ID

- 01

02-255 (Specify)

General InformationProvide Values

Liquid

- Water% Ethylene Glycol, 10 to 60,

increments of 5% Propylene Glycol, 10 to

60, increments of 5Other

Maximum System Pressure

Maximum Flow Rate

Design Supply Temperature

Design Return Temperature

Date:Reference Purchase Order:

Item No., Model No. On P.OCompany Name:

Address:

Contact:Tel:

E-Mail:

Selection(Mark

with an X)

Units of Measurement

Flow Rate

- Gal/Min

Liters/Min

Liters/SecMass Flow

- Lbs/Min

KG/MinEnergy Rate

- BTU/Min

kBTU/Min

kBTU/Hr

KWTotal Flow- Volume- Gallons

Liters

Cubic Meters

Total Flow- Mass

- LBS

KGTotal Energy

- kBTU

W-HRS

KW-HRSTemperature

- oFoC

Factory Default Preset Values are In Bold

1) Please give us somegeneral information.

2) Provide system setupinformation.

3) Select units of measurement.

4) Select pulse outputconfiguration.

DESCRIPTIONClark Sonic® ultrasonic flow transmitters are ideal for measurement offlow rates of acoustically conductive liquids including most clean liquids and many liquids with entrained solids.

Main advantages include excellent long term stability, no pressuredrop, broad fluid compatibility, high accuracy and low cost. Also, thereare no moving parts.

At the heart of the transmitter is a proprietary mixed signal ASICwhich allows sophisticated timing, control and transducer drive cir-cuitry to be combined on a single integrated circuit. The ASIC uses aspecial algorithm that is an improvement upon the standard single-path measurement technique. Using the “sing around” method, theultrasonic transducer alternates between transmitting and receiving tomeasure differences in flight time between upstream and downstreamtransmissions. A sound pulse is transmitted from an upstream trans-ducer towards a downstream transducer like a traditional time-of-flight measurement. However, the received sound pulse then triggers asecond downstream transmission, that then triggers a third and so onfor a specific number of cycles. This process is repeated in the upstreamdirection.

Because it takes an average flight time over multiple cycles to computethe difference in flight times, the approach yields a significantimprovement in timing accuracy when compared with the time-of -flight difference of a single sound pulse in each direction. This algo-rithm, combined with the pico-second timing resolution of the ASIC,provides the precise time measurement capability necessary for com-pact, small diameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temper-ature, density and viscosity as the flow calculation is independent ofthe speed of sound.

Wetted materials include ULTEM® encapsulated ultrasonic transducerswith a choice of elastomer seals and Brass body material.

www.clarksol.com

Liquid Ultrasonic Flow TransmittersLoop Powered 4-20 mA Output, Flows to 400 GPM, 3/4” to 3” Pipe, Brass

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per

“Standard Models” tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User Selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to

1200 kg/m3)Max. Working Pressure:

3/4” to 2”: 250 PSI (17.2 bars)3”: 210 PSI (14.5 bars)

Pipe Sizes: 3/4”, 1”, 1 1/2”, 2”, 3”Pipe Connections:

Sizes 3/4” to 2”- Female NPT, BSP Size 3”: ASME 150 or DIN 16 Flange

Electrical Enclosure: Integral to Body casting with gasketed cover; One 1/2” NPT conduit connection (plugged when model ordered with metric threads) and one M16 x 1.5 connection (plugged when model ordered with NPT threads)

Electrical Connections: Screw terminal connections on PC board

Enclosure Rating: NEMA 4 (IP 65)Power Supply: 18 to 36 VDC WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Brass (UNS C83600)


OUTPUTAnalog: 2-wire, 4-20 mA output; Output is 4 mA from zero

to min. flow (see Standard Model table)Error Detection: An optically isolated sink output is

activated under certain detectable fault conditions, such as transducer failure or overly noisey output due to flow stream anomalies, as might be seen due to excessive bubble entrainment.The optional Fault output is an optically isolated NPN transistor capable of sinking up to 10 mA from a voltage source of no more than 48 VDC.

Direction of Flow: Optional output to indicate direction of flow is available. Activation or deactIvation of an optically isolated 10 mA sink output indicates flow direction. Error detection is not available when this option is ordered.

Optional Temperature Sensor: 3 wire RTD, 100 Ohm, Platinum, 0.06% accuracy. Built in to transducer shell for monitoring process temperature. Optional 8 pin electrical connector standardly recommended with this option.

Optional NEMA•4 four oreight-pin receptaclesinstalled in transmitter conduit connection andfactory wired along withmating circular connectorssimplify field installation



AModel

BPipe Thread

CUnits of Measure

DTransducer Seal

EOptions

FTransmitter

Connector Option

CSLFB34CSLFB10CSLFB15CSLFB20CSLFB30

3/4” to 2”NPT= Female NPT

BSP=Female British Standard Pipe (G)3”

ASME= ASME Class 150 FlangeDIN= DIN Class 16 Flange

G= Gallons Per Minute (U.S.)L= Liters Per Minute

E= EPDMB= Buna-N

N= Neoprene®

V= FKM

-= NoneDF= Direction of flow output

optionR=100 OhmPlatinum RTD

DP=Display % F.SDS=Display in Engineering

Units- specify

-= 1/2” NPT 4R= 4-Pin Male Circular Receptacle 8R= 8-Pin Male Circular Receptacle

4C= 4-Pin Female Circular Connector8C= 8-Pin Female Circular Connector

*For non-listed ranges specify model followed by full span value Example: CSLFB15-50G = 50 GPM at 20 mA or CSLFB15-200L=200LPM @ 20 mA


STANDARD MODELS

Clark reserves the right to make design changes without prior notice.

Model Pipe Size/Thread Size

*Field Selectable Full Scale Ranges

(GPM)Min. Max.


(LPM)Min. Max.

CSLFB34 3/4” NPT or BSPL 0.23 15 0.90 60H 0.38 25 1.50 100

CSLFB10 1.0” NPT or BSPL 0.45 30 1.70 115H 0.75 50 3.00 200



CSLFB303” ASME Class 150 Flange

80 mm DIN Class 150 FlangeL 3.00 200 11.00 750H 6.00 400 23.00 1500

*Other F.S. ranges can be specified

Pipe sizes 3/4” to 2” 3” (80 mm) Pipe, ASME 150 & DIN 16 Flange

DIMENSIONS



3/4” & 1” 9.20 234 1.62 41.10 2.06 52.30 6.40 163 2.40 61.00

1-1/2” & 2” 9.88 251 2.75 69.90 2.51 63.80 6.40 163 2.40 61.00



3” ASME 150 11.00 - Ø 7.50 - 3.16 - 6.50 - 2.50 -

80 mm DIN 16 - 280 - 190 - 84.00 - 165 - 63.50

ORDER NUMBER (ABCDEF)Example: CSLFB10NPTGBR8C

DP/DS PANEL METER/DISPLAY OPTIONDigital panel meter installed on transmitterPower Supply: Loop PoweredDisplay: 4 1/2 Digit LED, 0.6”Case: NEMA 4XVersions: DP Option: Displays 0-100% F.S

DS Option: Scaled to customer requirement

Panel Meter/ Display option

Four or eight pin receptacle connector

recommended

DESCRIPTIONClark Sonic® ultrasonic flow transmitters are ideal for measurement offlow rates of acoustically conductive liquids including most clean liquids and many liquids with entrained solids. The transmitters areoptionally supplied with a built-in platinum 100 Ohm RTD temperaturesensor to monitor the processs temperature.

Main advantages include excellent long term stability, no pressuredrop, broad fluid compatibility, high accuracy and low cost. Also, thereare no moving parts.

At the heart of the transmitter is a proprietary mixed signal ASICwhich allows sophisticated timing, control and transducer drive cir-cuitry to be combined on a single integrated circuit. The ASIC uses aspecial algorithm that is an improvement upon the standard single-path measurement technique. Using the “sing around” method, theultrasonic transducer alternates between transmitting and receiving tomeasure differences in flight time between upstream and downstreamtransmissions. A sound pulse is transmitted from an upstream trans-ducer towards a downstream transducer like a traditional time-of-flight measurement. However, the received sound pulse then triggers asecond downstream transmission, that then triggers a third and so onfor a specific number of cycles. This process is repeated in the upstreamdirection.

Because it takes an average flight time over multiple cycles to computethe difference in flight times, the approach yields a significantimprovement in timing accuracy when compared with the time-of -flight difference of a single sound pulse in each direction. This algo-rithm, combined with the pico-second timing resolution of the ASIC,provides the precise time measurement capability necessary for com-pact, small diameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temper-ature, density and viscosity as the flow calculation is independent ofthe speed of sound.

Wetted materials include ULTEM® encapsulated ultrasonic transducers with a choice of elastomer seals andBrass body material.

www.clarksol.com

Liquid Ultrasonic Flow TransmittersModel FTCSLFB, DC Powered, Frequency Output, Flows to 400 GPM, 3/4” to 3” Pipe

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per

“Standard Models” tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User Selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to

1200 kg/m3)Max. Working Pressure: 250 PSI (17.2 bars)Pipe Sizes: 3/4”, 1”, 1-1/2”, 2”, 3”Pipe Connections:



Electrical Connections: Screw terminal connections on PC board

Optional Electrical Connections: 4 or 8 pin circularreceptacle installed in 1/2” conduit connection andinternally wired to transmitter connections. Availablein 2, 5 and 10 meter lengths (other lengths onrequest).Enclosure Rating: NEMA 4 (IP 65)Power: 18 to 36 VDC


Optional Temperature Sensor: 3 wire RTD, 100 Ohm, Plat-inum, 0.06% accuracy. Built in to transducer shell for moni-toring process temperature. Optional 8 pin electricalconnector standardly supplied with this option WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Brass (UNS C83600)OUTPUTFrequency: output is an optically isolated NPN transistor capable of sinking up to 10 mA from a voltage source of no more than 48 VDC.Frequency output isfrom10 to 1200 pulses/gallon depending on range (see Stan-dard Model table)


AModel

BPipe Thread

CUnits of Measure

DTransducer Seal

EOptions

FTCSLFB34FTCSLFB10FTCSLFB15FTCSLFB20FTCSLFB30

3/4” to 2”NPT= Female NPT

BSP=Female British Standard Pipe (G)3”

ASME= ASME Class 150 FlangeDIN= DIN Class 16 Flange


E= EPDMB= Buna-N

N= Neoprene®

V= FKM

RTD= Integrated RTD 4R= 4-Pin Female Circular Receptacle Connector8R= 8-Pin Female Circular Receptacle Connector

( use with RTD Option)4C=4-Pin Male Circular Connector, Field Wired8C=8-Pin Male Circular Connector, Field Wired

STANDARD MODELS


Model Pipe Size/Thread SizeFull Scale Ranges

(GPMMin. Max. Pulses/gallon


Min. Max. Pulses/literFTCSLFB34 3/4” NPT or BSP 0.38 25 1200 1.50 100 360FTCSLFB10 1.0” NPT or BSP 0.75 50 600 3.00 200 160FTCSLFB15 1.50” NPT or BSP 1.20 80 375 4.50 300 85FTCSLFB20 2.0” NPT or BSP 1.80 120 200 6.80 455 50

FTCSLFB303”ASME Class 150 Flange

80 mm DIN Class 150 Flange6.00 400 75 23.00 1500 20



3” ASME 150 11.00 - Ø 7.50 - 3.16 - 6.50 - 2.50 -80 mm DIN 16 - 280 - 190 - 84.00 - 165 - 63.50

Pipe sizes 3/4” to 2” 3” (80 mm) Pipe, ASME 150 & DIN 16 Flange

DIMENSIONS



3/4” & 1” 9.20 234 1.62 41.10 2.06 52.30 6.40 163 2.40 61.001-1/2” & 2” 9.88 251 2.75 69.90 2.51 63.80 6.40 163 2.40 61.00


Optional NEMA•4 four or eight-pin recptacles installed in transmitter

conduit connection and factory wiredalong with cordsets ordered to length

simplify field installation

WIRING

Example: FTCSLFB10NPTGBRTD8R

Rev092009

USER MANUALMODEL CSLFB

ULTRASONIC FLOW TRANSMITTER

Clark Solutions 10 Brent Drive, Hudson, MA 01749

Tel. 978 / 568 3400 Fax 978 / 568 0060www.clarksol.com

USER MANUALCLARK SONIC® MODEL CSLFB

The Model CSLFB is an ultrasonic transit time flow meterdesigned to accurately and reliably report the flow of non-compressi-ble fluids in pipe diameters ranging from ¾ inch to 3 inches. It is a 2- wire device reporting flow in the industry standard 4-20 mA proto-col. The meter introduces no pressure drop other than the pipe sec-tion which provides the means to position the ultrasonic transducersand to connect to the user’s piping system.

The small electronic board which implements all the func-tions to measure and report the flow is housed in the integral brassmeter body and is sealed so as to protect the electronics from theenvironment.

THEORY OF OPERATION

Two ultrasonic transducers are positioned and angled so as totransmit and receive sound pulses that are launched at a flat reflec-tion point located on the opposing side of the pipe. The flight timeof the sound pulse from the transmitting transducer to the receivingtransducer will be shortened if the pulse is launched in the directionof flow and increased if launched opposite to the direction of flow.By alternating the transmitting and receiving transducers, the differ-ence in these transit times can be used to calculate the velocity of theflow, which when multiplied by the area of the pipe, results in ameasure of volumetric flow rate which is then used to set the currentin the 4-20 ma loop proportional to the full scale value of the meter.

The path of this sonic pulse traverses the pipe diameter twiceand because of the generous spacing between transducers, thevolume of fluid which influences the time of flight of this pulse iscommensurate with the scale of the turbulence features in the flow.Turbulence by its nature has chaotic velocity components and bydirecting the sonic pulse through a volume comparable to the scaleof this chaos, the effect on the flight time on any single measure-ment are much reduced, resulting in measurements that show lessvariation from the average. Stating it another way, a measure of theStandard Deviation of a number of measurements will be reduced,resulting in less uncertainty in the currently reported flow rate.

IMPLEMENTATION

The accuracy and precision of the determined flow rate isultimately determined by the accuracy and precision with which onecan measure the transit times.

expires, a new 20 or 100 second period begins. This will allow theModel CSLFB to always present the last valid flow rate while a newvalid measurement is being sought. Under such severe bubble condi-tions, the meter will still give meaningful results but with longertimes between updates.

EXCEPTIONAL BEHAVIOR AND FAULT REPORTING

Three fault conditions can be detected and are reported viathe Fault output provided (FIG 1).

· Failure to perform necessary internal calibrations.· Failure to make reliable measurements.· Flow, which exceeds 125% of the selected Full Scale option.

The electronics must, upon initialization, be able to send and receivesound pulses of a minimum strength. If it cannot, no measurementscan be made. This may come about for two reasons:· The most likely reason the electronics cannot be calibrated isbecause of an interrupted sound. This would be the case if the pipewas not completely filled or there is excessive air entrapped in thefluid. Of least likelihood would be a system failure. Such a failuremay be a degraded transducer. Even less likely may be a failure in thecontrol electronics.

Whenever a there is a fault condition, the Opto Isolated Fault outputis set to conduct and the loop current is set to 4.0 Ma. The exceptionis if the Fault occurs because of an over range condition. In this casethe Fault output is activated but the loop current is left in excess of20 Ma.

Watchdog Timer:The software includes a Watchdog timer which will cause a

software reset should, for whatever reason, the code is not beingnormally exercised for more than about 2 seconds. This reset will nor-mally be transparent to the user. Should permanent damage to theunit have occurred, the normal fault reporting cannot be invokedand the Model CSLFB will have to be replaced.

The Model CSLFB incorporates a proprietary ASIC (ApplicationSpecific IC ), which provides all the functions required to alternatelytransmit and receive sonic pulses and measure the transit times topicosecond accuracy. The ASIC implements the “Sing Around”method to launch and receive pulses, each received pulse initiatingthe next transmitted pulse. On any one measurement, a number ofsuch cycles are used to accumulate the individual transit times whichare then divided by the number of cycles to give an average of thesemeasurements.

A microprocessor provides the following functions: · Control and calibration of the ASIC. · Calculations required to convert the measured times to

flow rate.· Setting of the 4-20 mA loop current to represent flow rate.· Response to User selectable switch settings.· Fault reporting via an optically isolated open collector

output.

INSTALLATION

The Model CSLFB may be installed in any orientation,although it is recommended that in horizontal pipe runs, an orienta-tion which positions the electrical enclosure vertically be avoided ifpossible. The reason for this caution is that, with any transit timemeter, erratic behavior may result if bubbles are allowed to accumu-late in the sound path. A mounting orientation of the electricalenclosure 90o from vertical is recommended. Install with a minimumof five pipe diameters of straight pipe, free of transitions, upstreamand two pipe diameters, free of transitions, downstream of the flowtransmitter.

DYNAMIC PERFORMANCEDuring steady flow, the Model CSLFB updates the 4-20 Ma loop cur-rent at a rate determined by the update time as selected by SW2 (fig.3). This update rate will either be every 10 seconds if “SLOW”response has been set or every 2 seconds if the “FAST” is set.

Air entrained in the flow, will cause erroneous measurementsto be made. Algorithms have been developed that reject such meas-urements so that only valid measurements are retained. If a validmeasurement cannot be made within 20 consecutive attempts whilein the Fast mode, or within 100 consecutive attempts in the Slowmode, then a Fault condition is activated. However, any time a validmeasurement can be made before the 20 or 100 second period

USER SELECTABLE OPTIONS

There are three switches (FIG 3) accessible when the controller boardis exposed. Their functions are as follows:

· Reset.o This is a small push button switch which when activated resets the software as would occur if the unit were power cycled.

· Full Scaleo This is a dip switch setting that allows the User to select between two pre-programmed full scale valuesfor the pipe diameter currently used. See the Specification section for detail.

· Response Timeo This switch setting allows the User to select two different update rates. In many applications, a longerupdate rate is desired and acceptable. With this slower update rate, the Model CSLFB will average read-ings over a longer time, resulting, (in the case of steady flow), a more constant reported flow rate. Seethe Specification section for details.

o In the case where the Model CSLFB is to be used as a feedback transducer in a control loop, a faster response time may be desirable.

Use:If either the Full scale or Response Time switch has been changed since the last Reset or power cycle, then the Model CSLFB must be reset using the Reset switch or else power cycled.

CALIBRATIONAs mentioned in the “Theory of Operation” and the “Imple-

mentation” sections, the Model CSLFB employs the Sing Aroundmethod of determining transit times. This method results in a meas-urement of fluid velocity which is independent of the speed of soundthrough the fluid and hence its dependence on temperature. Thisspeed of sound independence removes all need for field calibration.

However, to report volumetric flow rate, this velocity must be multi-plied by the cross sectional area through which the velocity wasmeasured. This area is set by the internal pipe diameter, D. Anyuncertainty in D translates directly to an uncertainty in flow rate, Q.Quantitatively,

Q(% error) = 200 * d/D, where d is the +/- tolerance of D.As an example, a +/- .01 inch uncertainty in the nominal

diameter of a 2 inch pipe would result in a +/- 1 % error in reportedflow rate, Q.

At Clark Solutions each meter is calibrated against a traceablestandard meter and a constant set in software, which reflects thisactual diameter rather than the nominal diameter. This method ofcalibration removes an otherwise indeterminate error.

The error resulting from the thermal expansion of the diame-ter over the specified temperature range would however result in theflow rate being under reported by 0.1 %.

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per “Standard Models”

tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User Selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to

1200 kg/m3)Max. Working Pressure: 250 PSI (17.2 bars)Pipe Sizes: 3/4”, 1”, 1 1/2”, 2”, 3”Pipe Connections:



Electrical Connections: Screw terminal connections on PC boardEnclosure Rating: NEMA 4 (IP 65)Power Supply: 18 to 36 VDC WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Brass (UNS C83600)OUTPUTAnalog: 2-wire, 4-20 mA output; Output is 4 mA from zero to min.

flow (see Standard Model table) Loop Resistance: See FIG. 2

FIG 1

FIG 2

STANDARD MODELS

FIG 3

Response TimeSwitch Position

Range Switch Position(See Standard Models

Table)S= 10 SecondsF= 2 seconds

L= Low Standard RangeH= High Standard Range

Error Detection: An optically isolated sink output is activated under certain detectable fault conditions, such as transducer failure or overly noisey output due to flow stream anomalies, as might be seen due to excessive bubble entrainment. The optional Fault output is an optically isolated NPN transistor capable of sinking up to 10 mA from a voltage source of no more than 48 VDC.

Caution: There is no current limiting on this output so care must be exercised to limit the sink current to less than 25 ma and insurethat proper polarity, as shown in Fig.1, is observed else permanentdamage may result.

Direction of Flow: Optional output to indicate direction of flow is available. Activation or deactivation of an optically isolated 10 mA(max. 48V no load voltage) sink output indicates flow direction.Error detection is not available when this option is ordered.

Model Pipe Size/Thread Size


(GPM)Min. Max.


(LPM)Min. Max.

CSLFB34 3/4” NPT or BSPL 0.23 15 0.90 60H 0.38 25 1.50 100




CSLFB303” ASME Class 150 Flange

80 mm DIN Class 150 FlangeL 3.00 200 11.00 750H 6.00 400 23.00 1500

*Other F.S. ranges can be specified

CAUTION

Model CSLFB is for measurement of liquid flows only

Use only with liquids compatible with the materials of construction

Maximum Pressure: 250 PSIG

Maxim Temperature: 190oF

Pipe sizes 3/4” to 2”

DIMENSIONS



3” ASME 150 11.00 - Ø 7.50 - 3.16 - 6.50 - 2.50 -

80 mm DIN 16 - 280 - 190 - 84.00 - 165 - 63.50

3” (80 mm) Pipe, ASME 150 & DIN 16 Flange



3/4” & 1” 9.20 234 1.62 41.10 2.06 52.30 6.40 163 2.40 61.00

1-1/2” & 2” 9.88 251 2.75 69.90 2.51 63.80 6.40 163 2.40 61.00

DESCRIPTIONClark Sonic® Ultrasonic Flowmeters are ideal for measurement of flow rates of acoustically conductive liquidsincluding most clean liquids and many liquids with entrainedsolids.

Main advantages include excellent long term stability, no pres-sure drop, broad fluid compatibility, high accuracy and low cost.Also, there are no moving parts.

At the heart of the transmitter is a proprietary mixed signalASIC which allows sophisticated timing, control and transducerdrive circuitry to be combined on a single integrated circuit. TheASIC uses a special algorithm that is an improvement upon thestandard single-path measurement technique. Using the “singaround” method, the ultrasonic transducer alternates betweentransmitting and receiving to measure differences in flight timebetween upstream and downstream transmissions. A soundpulse is transmitted from an upstream transducer towards adownstream transducer like a traditional time-of-flight meas-urement. However, the received sound pulse then triggers asecond downstream transmission that then triggers a third andso on for a specific number of cycles. This process is repeated inthe upstream direction.

Because it takes an average flight time over multiple cycles to compute the difference in flight times, theapproach yields a significant improvement in timing accuracy when compared with the time-of -flight differenceof a single sound pulse in each direction. This algorithm, combined with the pico-second timing resolution of theASIC, provides the precise time measurement capability necessary for compact, small diameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temperature, density and viscosity as the flow cal-culation is independent of the speed of sound.

Wetted materials include ULTEM® encapsulated ultrasonic transducers with a choice of elastomer seals and epoxycoated carbon steel body material.

www.clarksol.com

Liquid Ultrasonic Flow TransmittersLoop Powered 4-20 mA Output, Flows to 3000 GPM, 4” to 10” Pipe, Carbon Steel

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per “Standard Models” tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to 1200 kg/m3)Max. Working Pressure: 200 PSI (13.8 bars)Pipe Sizes: 4”, 6”, 8”, 10”Pipe Connections: ASME class 150 flange Electrical Enclosure: Integral to Body casting with gasketed cover; One 1/2” NPT conduit connection (plugged when model ordered with metric threads) and one M16 x 1.5 connection (plugged when model ordered with NPT threads)Electrical Connections: Screw terminal connections on PC boardEnclosure Rating: NEMA 4 (IP 65)Power Supply: 18 to 36 VDC WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Schedule 40, epoxy coated, carbon steel pipe


OUTPUTAnalog: 2-wire, 4-20 mA output; Output is 4 mA from zero

to min. flow (see Standard Model table)Error Detection: An optically isolated sink output is

activated under certain detectable fault conditions, such as transducer failure or overly noisy output due to flow stream anomalies, as might be seen due to excessive bubble entrainment.The optional Fault output is an optically isolated NPN transistor capable of sinking up to 10 mA from a voltage source of no more than 48 VDC.

Direction of Flow: Optional output to indicate direction of flow is available. Activation or deactIvation of an optically isolated 10 mA sink output indicates flow direction. Error detection is not available when this option is ordered.

Optional Temperature Sensor: 3 wire RTD, 100 Ohm, Platinum, 0.06% accuracy. Built in to transducer shell for monitoring process temperature. Optional 8 pin electrical connector recommended with this option.

Optional NEMA•4 four oreight-pin receptaclesinstalled in transmitter conduit connection andfactory wired along withmating circular connectorssimplify field installation


STANDARD MODELS

DIMENSIONS


PipeSize

Dimensions (Inches)


Number ofHoles

4” 13.00 9.00 4.00 6.54 2.62 0.75 7.50 8

6” 16.00 11.00 5.09 6.54 2.62 0.88 9.50 8

8” 18.00 13.50 6.11 6.54 2.62 0.88 11.75 8

10” 22.00 16.00 7.18 6.54 2.62 1.00 14.25 12

ModelPipeSize


(GPM)Min. Max.


(LPM)Min. Max.

CSLFC4 4”L 4.5 300 17.0 1150H 7.5 500 29.0 1900

CSLFC6 6”L 9.0 600 35.0 2300H 18.0 1200 68.0 4500

CSLFC8 8”L 15.0 1000 57.0 3800H 30.0 2000 114 7600

CSLFC10 10”L 22.5 1500 86.0 5700H 45.0 3000 165 11000

*F.S. ranges can be user specified to 125% of each stated high (H) range withno change to specifications and to 25% of each low (L) range with some specifi-

cation modification.

ELECTRICAL


ORDERING INFORMATIONORDER NUMBER (ABCDE)Example: CSLFC10GB

AModel

BUnits of Measure

CTransducer Seal

DOptions

ETransmitter

Connector Option

CSLFC4CSLFC6CSLFC8CSLFC10


E= EPDMB= Buna-N

N= Neoprene®

V= FKM

-= NoneDF= Direction of flow output option

R=100 OhmPlatinum RTDDP=Display % F.S

DS=Display in Engineering Units

-= 1/2” NPT4R= 4-Pin Male Circular Receptacle 8R= 8-Pin Male Circular Receptacle

4C= 4-Pin Female Circular Connector4C= 4-Pin Male Circular Connector

*For non-listed ranges specify model followed by full span value Example: CSLFC4-150G = 150 GPM at 20 mA or CSLFC4-750L=750LPM @ 20 mA

ULTEM® is a registered trademark of The General Electric Company Neoprene® is a registered trademark of DuPont Dow

Ask about ourremote mount series

1000 & 2000 flowrate indicators and

totalizers

Digital panel meter installed on transmitterPower Supply: Loop PoweredDisplay: 4 1/2 Digit LED, 0.6”Case: NEMA 4XVersions: DP Option: Displays 0-100% F.S




recommended

DP/DS PANEL METER/DISPLAY OPTION

FIELD SERVICE

Two opposing CSLFC ultrasonic transducers are inserted into fixedULTEM® drywells and held in place with light spring force. A locating keyway in the drywell aids insertion and positioning ofthe transducers. In the event of field failure of a transducer,replacement is straightforward and can be accomplished withoutremoving the pipe spool and shutting down the process.

The electrical PC board can also be field replaced. Calibrationfactor and other specific information are maintained at the factoryfor all transmitters shipped.


1 Spring Retainer

2 Spring

3 Clamp

4 Bushing

5 Drywell

6 Ultrasonic Trasducer

DESCRIPTIONClark Sonic® Ultrasonic Flowmeters are ideal for measurement of flow rates of acoustically conductive liquidsincluding most clean liquids and many liquids with entrainedsolids. The transmitters are optionally supplied with a built-inplatinum 100 Ohm RTD temperature sensor to monitor theprocesss temperature.

Main advantages include excellent long term stability, no pressure drop, broad fluid compatibility, high accuracy and lowcost. Also, there are no moving parts.

At the heart of the transmitter is a proprietary mixed signalASIC which allows sophisticated timing, control and transducerdrive circuitry to be combined on a single integrated circuit. TheASIC uses a special algorithm that is an improvement upon thestandard single-path measurement technique. Using the “singaround” method, the ultrasonic transducer alternates betweentransmitting and receiving to measure differences in flight timebetween upstream and downstream transmissions. A soundpulse is transmitted from an upstream transducer towards adownstream transducer like a traditional time-of-flight measurement. However, the received sound pulse then triggersa second downstream transmission that then triggers a thirdand so on for a specific number of cycles. This process is repeated in the upstream direction.

Because it takes an average flight time over multiple cycles to compute the difference in flight times, theapproach yields a significant improvement in timing accuracy when compared with the time-of-flight differenceof a single sound pulse in each direction. This algorithm, combined with the pico-second timing resolution of theASIC, provides the precise time measurement capability necessary for compact, small diameter ultrasonic meters.

The output of the transmitter is unaffected by changes in fluid temperature, density and viscosity as the flow cal-culation is independent of the speed of sound.

Wetted materials include ULTEM® encapsulated ultrasonic transducers with a choice of elastomer seals and epoxycoated carbon steel body material.

www.clarksol.com

Liquid Ultrasonic Flow TransmittersModel FTCSLFC, DC Powered, Frequency Output, Flows to 3000 GPM, 4” to 10” Pipe

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per “Standard Models” tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC)Response Time: User selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to 74.9 lb/cu.ft. (490 to 1200 kg/m3)Max. Working Pressure: 200 PSI (13.8 bars)Pipe Sizes: 4”, 6”, 8”, 10”Pipe Connections: ASME class 150 flange Electrical Enclosure: Integral to Body casting with gasketed cover; One 1/2” NPT conduit connection (plugged when model ordered with metric threads) and one M16 x 1.5 connection (plugged when model ordered with NPT threads)Electrical Connections: Screw terminal connections on PC boardOptional Electrical Connections: 4 or 8 pin circularreceptacle installed in 1/2” conduit connection andinternally wired to transmitter connections. Availablein 2, 5 and 10 meter lengths (other lengths onrequest).

Enclosure Rating: NEMA 4 (IP 65)Power: 18 to 36 VDC


Optional Temperature Sensor: 3 wire RTD, 100 Ohm,Platinum, 0.06% accuracy. Built in to transducer shell formonitoring process temperature. Optional 8 pin electricalconnector standardly supplied with this option WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Schedule 40, epoxy coated, carbon steel pipeOUTPUTFrequency: output is an optically isolated NPN transistor capable of sinking up to 10 mA from a voltage source of no more than 48 VDC.Frequency outputis from10 to 1200 pulses/gallon depending on range (seeStandard Model table)


STANDARD MODELS

DIMENSIONS


PipeSize

Dimensions (Inches)


Number ofHoles

4” 13.00 9.00 4.00 6.54 2.62 0.75 7.50 8

6” 16.00 11.00 5.09 6.54 2.62 0.88 9.50 8

8” 18.00 13.50 6.11 6.54 2.62 0.88 11.75 8

10” 22.00 16.00 7.18 6.54 2.62 1.00 14.25 12

ModelPipeSize

Full Scale Ranges (GPM)



Min. Max. Pulses/literFTCSLFC4 4” 7.5 500 60 29 1900 16FTCSLFC6 6” 18 1200 25 68 4500 7FTCSLFC8 8” 15 2000 15 114 7600 4FTCSLFC10 10” 45 3000 10 165 11000 3

Optional NEMA 4 four or eight-pin recptacles installed in transmitter

conduit connection and factory wiredalong with cordsets ordered to length

simplify field installation

WIRING


ORDERING INFORMATIONORDER NUMBER (ABCD)Example: FTCSLFC10GBRTD8R

AModel

BUnits of Measure

CTransducer Seal

DOptions

FTCSLFC4FTCSLFC6FTCSLFC8FTCSLFC10


E= EPDMB= Buna-N

N= Neoprene®

V= FKM

DP=Display % F.SDS=Display in Engineering Units

RTD= Integrated RTD 4R= 4-Pin Female Circular Receptacle Connector8R= 8-Pin Female Circular Receptacle Connector

( use with RTD Option)4C=4-Pin Male Circular Connector, Field Wired8C=8-Pin Male Circular Connector, Field Wired


Digital panel meter installed on transmitterDisplay: 4 1/2 Digit LED, 0.6”Case: NEMA 4XVersions: DP Option: Displays 0-100% F.S




recommended

DP/DS PANEL METER/DISPLAY OPTION

FIELD SERVICE

Two opposing FTCSLFC ultrasonic transducers are inserted intofixed ULTEM® drywells and held in place with light spring force. A locating keyway in the drywell aids insertion and positioning ofthe transducers. In the event of field failure of a transducer,replacement is straightforward and can be accomplished withoutremoving the pipe spool and shutting down the process.

The electrical PC board can also be field replaced. Calibrationfactor and other specific information are maintained at the factoryfor all transmitters shipped.


1 Spring Retainer

2 Spring

3 Clamp

4 Bushing

5 Drywell

6 Ultrasonic Trasducer

Ask about ourremote mount series

1000 & 2000 flowrate indicators and

totalizers

Rev04009

USER MANUALMODEL CSLFC

ULTRASONIC FLOW TRANSMITTER

Clark Solutions 10 Brent Drive, Hudson, MA 01749

Tel. 978 / 568 3400 Fax 978 / 568 0060www.clarksol.com

USER MANUALCLARK SOLUTIONS MODEL CSLFC

The Model CSLFC is an ultrasonic transit time flow meterdesigned to accurately and reliably report the flow of non-compressi-ble fluids in pipe diameters ranging from 4 inch to 10 inches. It is a 2- wire device reporting flow in the industry standard 4-20 mA proto-col. The meter introduces no pressure drop other than the pipe sec-tion which provides the means to position the ultrasonic transducersand to connect to the user’s piping system.

The small electronic board which implements all the func-tions to measure and report the flow is housed in the integral elec-tronic enclosure and is sealed so as to protect the electronics fromthe environment.

THEORY OF OPERATION

Two ultrasonic transducers are positioned and angled so as totransmit and receive sound pulses that are launched at a flat reflec-tion point located on the opposing side of the pipe. The flight timeof the sound pulse from the transmitting transducer to the receivingtransducer will be shortened if the pulse is launched in the directionof flow and increased if launched opposite to the direction of flow.By alternating the transmitting and receiving transducers, the differ-ence in these transit times can be used to calculate the velocity of theflow, which when multiplied by the area of the pipe, results in ameasure of volumetric flow rate which is then used to set the currentin the 4-20 ma loop proportional to the full scale value of the meter.

The path of this sonic pulse traverses the pipe diameter twiceand because of the generous spacing between transducers, thevolume of fluid which influences the time of flight of this pulse iscommensurate with the scale of the turbulence features in the flow.Turbulence by its nature has chaotic velocity components and bydirecting the sonic pulse through a volume comparable to the scaleof this chaos, the effect on the flight time on any single measure-ment are much reduced, resulting in measurements that show lessvariation from the average. Stating it another way, a measure of theStandard Deviation of a number of measurements will be reduced,resulting in less uncertainty in the currently reported flow rate.

IMPLEMENTATION

The accuracy and precision of the determined flow rate isultimately determined by the accuracy and precision with which onecan measure the transit times.

might be experienced if excessive bubble volume is entrained in theflow, the Model CSLFC will activate the FAULT output opto isolatorand simultaneously set the loop current to 3.7 mA to indicate faultcondition. This fault condition will be maintained until eight consecu-tive good measurements are made at which time the Model CSLFCwill revert to its normal mode.

EXCEPTIONAL BEHAVIOR AND FAULT REPORTING

Two fault conditions can be detected and are reported via theFault output provided (FIG 1).

· Failure of the ASIC to perform necessary internal calibrations.

· Failure to make reliable measurements.

The ASIC must, upon initialization, be able to send and receive soundpulses of a minimum strength. If it cannot, no measurements can bemade. This may come about for two reasons:

· The most likely reason the ASIC cannot be calibrated is because of a sound path that is not completely through the fluid. This would be the case if the pipe were not completely filled with fluid.· Although the pipe may be properly filled, bubbles of air trapped near a transducer would also preclude a calibration.· Lastly and of least likelihood would be a system failure. Sucha failure may be a degraded transducer. Less likely may be a failure in the control electronics.

Watchdog Timer:The software includes a Watchdog timer which will cause a

software reset should, for whatever reason, the code is not beingnormally exercised for more than about 2 seconds. This reset will nor-mally be transparent to the user. Should permanent damage to theunit have occurred, the normal fault reporting cannot be invokedand the Model CSLFC will have to be replaced.

The Model CSLFC incorporates a proprietary ASIC (Application SpecificIC ), which provides all the functions required to alternately transmitand receive sonic pulses and measure the transit times to picosecondaccuracy. The ASIC implements the “Sing Around” method to launchand receive pulses, each received pulse initiating the next transmittedpulse. On any one measurement, a number of such cycles are used toaccumulate the individual transit times which are then divided by thenumber of cycles to give an average of these measurements.

A microprocessor provides the following functions: · Control and calibration of the ASIC. · Calculations required to convert the measured times to

flow rate.· Setting of the 4-20 mA loop current to represent flow rate.· Response to User selectable switch settings.· Fault reporting via an optically isolated open collector

output.

INSTALLATION

The Model CSLFC may be installed in any orientation, althoughit is recommended that in horizontal pipe runs, an orientation whichpositions the electrical enclosure vertically be avoided if possible. Thereason for this caution is that, with any transit time meter, erraticbehavior may result if bubbles are allowed to accumulate in the soundpath. A mounting orientation of the electricalenclosure 90o from vertical is recommended. Install with a minimumof five pipe diameters of straight pipe, free of transitions, upstreamand two pipe diameters, free of transitions, downstream of the flowtransmitter.

DYNAMIC PERFORMANCE

The Model CSLFC is designed to react to abrupt changes inflow rate. During steady flow, the Model CSLFC updates the 4-20 mAloop current at a rate determined by the update time as selected bySW2 (fig. 3). This update rate will either be every 10 seconds if “SLOW”response has been set or every 2 seconds if the “FAST” is set. However,if a flow rate is measured that is greater than plus or minus 10% of thecurrent rate, the Model CSLFC will invoke the 2 second update modefor the duration of the transient change after which it will revert tothe selected update rate. This feature is seen as advantageous whenthe Model CSLFC is used as the feedback transducer in a process con-trol loop while at the same time the normal update rate has beenselected to be the 10 second rate.

In the case of eight or more consecutive bad measurements as

USER SELECTABLE OPTIONS

There are three switches (FIG 3) accessible when the controller boardis exposed. Their functions are as follows:

· Reset.

o This is a small push button switch which when activated resets the software as would occur if the unit were power cycled.

· Full Scaleo This is a dip switch setting that allows the User to select between two pre-programmed full scale valuesfor the pipe diameter currently used. See the Specification section for detail.

· Response Timeo This switch setting allows the User to select two different update rates. In many applications, a longerupdate rate is desired and acceptable. With this slower update rate, the Model CSLFC will average read-ings over a longer time, resulting, (in the case of steady flow), a more constant reported flow rate. Seethe Specification section for details.

o In the case where the Model CSLFC is to be used as a feedback transducer in a control loop, a faster response time may be desirable.

Use:If either the Full scale or Response Time switch has been changed since the last Reset or power cycle, then the Model CSLFC must be reset using the Reset switch or else power cycled.

CALIBRATIONAs mentioned in the “Theory of Operation” and the “Imple-

mentation” sections, the Model CSLFC employs the Sing Aroundmethod of determining transit times. This method results in a meas-urement of fluid velocity which is independent of the speed of soundthrough the fluid and hence its dependence on temperature. Thisspeed of sound independence removes all need for field calibration.

However, to report volumetric flow rate, this velocity must be multi-plied by the cross sectional area through which the velocity wasmeasured. This area is set by the internal pipe diameter, D. Anyuncertainty in D translates directly to an uncertainty in flow rate, Q.Quantitatively,

Q(% error) = 200 * d/D, where d is the +/- tolerance of D.As an example, a +/- .01 inch uncertainty in the nominal

diameter of a 2 inch pipe would result in a +/- 1 % error in reportedflow rate, Q.

At Clark Solutions each meter is calibrated against a traceablestandard meter and a constant set in software, which reflects thisactual diameter rather than the nominal diameter. This method ofcalibration removes an otherwise indeterminate error.

The error resulting from the thermal expansion of the diame-ter over the specified temperature range would however result in theflow rate being under reported by 0.1 %.

SPECIFICATIONSGENERALFlow Range: Bi-directional, field selectable per “Standard Models”

tableAccuracy: ±0.75% of full scaleOperating Temperature: -40 to 190oF (-40 to 87.8oC))Response Time: User selectable, 2 or 10 secondsViscosity Range: 0.2 to 150 cSt (0.2 to 150 mPas)Liquid Density: 30.6 to74.9 lb/cu.ft. (490 to 1200 kg/m3)Max. Working Pressure: 200 PSI (13.8 bars)Pipe Sizes: 4”, 6”, 8”, 10”Pipe Connections: ASME class 150 flange Electrical Enclosure: Integral to Body casting with gasketed cover;

One 1/2” NPT conduit connection (plugged when model ordered with metric threads) and one M16 x 1.5 connection (plugged when model ordered with NPT threads)

Electrical Connections: Screw terminal connections on PC boardEnclosure Rating: NEMA 4 (IP 65)Power Supply: 18 to 36 VDC WETTED MATERIALSUltrasonic Transducers: ULTEM® EncapsulatedSeals: EPDM, Buna-N, Neoprene™, FKM, or otherBody Material: Schedule 40, epoxy coated, carbon steel pipeOUTPUTAnalog: 2-wire, 4-20 mA output; Output is 4 mA from zero to min.

flow (see Standard Model table) Loop Resistance: See FIG. 2

FIG 1

FIG 2

STANDARD MODELS

FIG 3

Response TimeSwitch Position

Range Switch Position(See Standard Models

Table)S= 10 SecondsF= 2 seconds

L= Low Standard RangeH= High Standard Range

Error Detection: An optically isolated sink output is activated under certain detectable fault conditions, such as transducer failure or overly noisey output due to flow stream anomalies, as might be seen due to excessive bubble entrainment. The optional Fault output is an optically isolated NPN transistor capable of sinking up to 10 ma from a voltage source of no more than 48 VDC.

Caution: There is no current limiting on this output so care must be exercised to limit the sink current to less than 25 ma and insurethat proper polarity, as shown in Fig.1, is observed else permanentdamage may result.

Direction of Flow: Optional output to indicate direction of flow is available. Activation or deactivation of an optically isolated 10 mA(max. 48V no load voltage) sink output indicates flow direction.Error detection is not available when this option is ordered.

ModelPipeSize


(GPM)Min. Max.


(LPM)Min. Max.

CSLFC4 4”L 3.75 300 14.38 1150H 6.25 500 23.75 1900

CSLFC6 6”L 7.50 600 28.75 2300H 15.0 1200 56.25 4500

CSLFC8 8”L 12.5 1000 47.50 3800H 25.0 2000 95.00 7600

CSLFC10 10”L 18.75 1500 71.25 5700H 37.50 3000 137.50 11000

*F.S. ranges can be user specified to 125% of each stated high (H) range with no change to speci-fications and to 25% of each low (L) range with some specification modification. Consult factory.

DIMENSIONSCAUTION

Model CSLFC is for measurement of liquid flows only

Use only with liquids compatible with the materials of construction

Maximum Pressure: 200 PSIG

Maximum Temperature: 190oF

PipeSize

Dimensions (Inches)


Number ofHoles

4” 13.00 9.00 4.00 6.54 2.62 0.75 7.50 8

6” 16.00 11.00 5.09 6.54 2.62 0.88 9.50 8

8” 18.00 13.50 6.11 6.54 2.62 0.88 11.75 8

10” 22.00 16.00 7.18 6.54 2.62 1.00 14.25 12

www.clarksol.com

DN420 Vortex Flow TransmitterLoop Powered, 2-Wire, 4-20 mA & Frequency Output , 1/4” to 3/4” Pipe Sizes


Features• Low cost product with high levels of accuracy• Temperature insensitive measuring principle• Excellent media resistance (measuring element

not in contact with the media)• Minimal pressure loss• Measuring element not sensitive to debris • Direct temperature measurement in the

medium

Wetted materials:Sensor vane: ETFE Sealing material: EPDM Flow sensor and bluff:

ASTM- PPA, PolyphthalamideISO-PA6T/6I, Grivory 40%GF

Power supply: 5 VDC (4.75 to 5.25)Output: 2-wire, 4-20 mA current output andsquare pulse frequency output. Pulse output is anoptically isolated NPN transistor with maximumsinking capability to 25 mA from a voltage sourceof no more than 45 VDC.Response time: Output updated every 2 secondsElectrical connection: 2 ft 4-conductor cable;two wires for loop powered 4-20 mA analogoutput & two wires for pulse output. Liquidtight1/2” non-metalic conduit connector suppliedPolarity reversal protectedProtection class: NEMA 4X, IP65Mounting position: Flow direction is identifiedby an arrow on flowmeter body. Otherwise, theflowmeter mounting orientation is universal.Allow 5 or more straight pipe diameters on inlet ofthe flowmeter and two or more straight pipediameters at outlet to maintain specified accuracy.Piping connection fittings: See tables 2 & 3 forstandard selection of types & sizes. Special fittingscan be produced by Clark or the customer.

DESCRIPTIONThe DN420 series vortex flow transmitters are looppowered. They are an excellent and economical choicefor liquid media flow monitoring and control in 1/4” to3/4”piping systems.

The transmitters work on the principle of Kármánsvortex trail, named after Theodore von Kármán's math-ematical description of the phenomenon. Vortex shed-ding flowmeters present the flow in a pipe with anobstruction/bluff in the flowmeter body. As velocityincreases, alternating vortices are formed on each sideof the bluff body and travel downstream.

The DN420 series utilize piezoelectric sensors embed-ded in an ETFE vane located downstream of the bluffto detect the generated vortices. The frequency measured represents the flow velocity. A flow factor isprovided to convert frequency to volume flow rate foreach model size. Each model is provided with a fre-quency/pulse output and a linear 4-20 mA output pro-portional to flow.

The minimum measured flow rate is dependent on theviscosity of the fluid.

Versions with a 1000 Ohm RTD temperature sensor areoptionally available.

SPECIFICATIONSMedium: Suitable for water & water glycol based heatexchange systems with the usual additives and otherfluids compatible with the materials of construction(consult factory). For media with viscosity greater than2 millipascal seconds (2 centipoise), higher flow ratesare required to form vortices raising the minimummeasurable flow rate value. Flow ranges: From 0.3 to 22 GPM See model table 1.Temperature measurement: Optional PT1000 RTD imbedded in flow sensor, consult factory

Measure range -40oF to +302oF (– 40 to > +150 °C) 1000.00 Ohm @ 32oF (0 °C) 1573.25 Ohm @ 302oF (150 °C)

Temperature: Ambient: 5o to185oF (–15 to + 85 °C)In storage: -22o to 185oF (–30 to + 85 °C)

Max. pressures and medium temperature:

Max. test pressure: 261 psi/18 bar at 104oF/40 °CLoss of pressure / cavitation: A minimum inlet pressure of 10 psi (0.7 bars) is required to avoid cavita-tion issues at maximum flow.

psi bar oF oC Duration174 12 104 40 Lifetime100 6.89 200 93.3 Lifetime87 6 212 100 Lifetime58 4 257 125 600 hours58 4 284 140 2 hours


Weight (Without End Fittings):DN420-8 approx. 0.55 lbs (249 g)DN420-10 approx. 0.58 lbs (263 g)DN420-15 approx. 0.60 lbs (272 g)DN420-20 approx. 0.65 lbs (295 g)

Accuracy:Up to 50% fs: < 1% fs From 50% fs: < 2% of measured value

Temperature measurement accuracy:PT 1000 for DIN EN 60751 Class B

± 0.8oF @ 68o (± 0.45 °C @ 20 °C)±1.4oF @ 190oF (± 0.75 °C @ 90 °C)

Table 1- Models

Model PipeSize

Full Scale Range (Gal/min)

PulsesPer Gallon

Flow Formula

(Q=Flow in GPM)

Max.Pressure Loss

(PSID)

DN420-8 1/4” 0.25 to 4 7200 Q=.00833xFreq.

2.9DN420-10 3/8” 0.5 to 8 3600 Q=.01667xFreq.DN420-15 1/2” 1.0 to 13 2000 Q=.030xFreq.DN420-20 3/4” 1.5 to 22 1200 Q=.05xFreq.

Dimensions do not include pipe fittings. See tables 2 & 3 for standard

fitting offerings.

ELECTRICAL

PIPE ADAPTORSStainless Adaptors

Pulse Output Wiring

2-wire 4-20 mA & Pulse Out: 4-conductor cableRed (+): Vin 12 to 36 VDC, 4-20 mABlack (-): Vin Return, 4-20 mAGreen : OPTO NPN CWhite: OPTO NPN E

DIMENSIONS (INCHES)


Fitting Kit P/N(Includes 2 Clips, 2 O-rings &

2 Brass Adaptors)

Clip Part

Number

O-RingPart Number

(Material)

AdapterPart

NumberMaterial

Standard Tubing Size(For Use WithType K & Type LCopper

Tubing)

KSADB1/2 C15R15E

(EPDM)SADB1/2 360 Brass 1/2”

KSADB3/4 C20R20E

(EPDM)SADB3/4 360 Brass 3/4”

ORDERING INFORMATIONModel Description

DN420-8-KADS1/4Flow Transmitter with 1/4” NPT Stainless Steel End Connections,






DN420-15-KSADB1/2Flow Transmitter with Brass Solder Fittings for 1/2” Copper Pipe

(Fittings, Mounting Clips & O-rings Supplied Unassembled)



DN420-20-KSADB3/4Flow Transmitter with Brass Solder Fittings for 3/4” Copper Pipe

(Fittings, Mounting Clips & O-rings Supplied Unassembled)

Model Description

C810 Clip

C15 Clip

C20 Clip

R810E EPDM O-ring

R15E EPDM O-ring

R20E EPDM O-ring

Model Description







Brass Solder Adaptors

SADB3/4SADB1/2

Table 3- Brass Solder Adaptors

The DN420 offers great flexibility with respect to piping connections. Inserting and removing fittings is easy. A clip secures the end fitting to the flow sensor and an o-ring provides the seal.

Fitting Kit P/N(Includes 2 Clips,

2 O-rings & 2 Adaptors)

Clip Part

Number

O-RingPart

Number(Material)

ThreadedAdapter

Part NumberMaterial A

Binches(mm)

Cinches(mm)

Dinches(mm)

Einches(mm)

Finches(mm)

ginches(mm)

Hinches(mm)

KADS1/4 C810R810E(EPDM)

ADS1/4 304 SS 1/4” NPT1.76

(44.65)2.27

(57.65)0.551(14)

1.142(29)

0.965(24.5)

0.236 (6)

1.21 (30.8)

KADS3/8 C810R810E(EPDM)

ADS3/8 304 SS 3/8” NPT1.76

(44.65)2.27

(57.65)0.551(14)

1.142(29)

0.965(24.5)

0.236 (6)

1.21 (30.8)

KADS1/2 C15R15E

(EPDM)ADS1/2 303 SS 1/2” NPT

1.97(50.05)

2.64(67.05)

0.646(16.4)

1.260(32)

1.1(28)

0.191(4.85)

1.36(34.5)

KADS3/4 C20R20E

(EPDM)ADS3/4 303 SS 3/4” NPT

2.32(58.85)

3.36(85.25)

0.731(18.6 )

1.499(37.8)

1.1(28)

0.315(8)

1.36(34.5)

Table 2- Stainless Threaded Adaptors

Consult Factory For Optional Built-in RTD Temperature Sensor

clark sonic flow general

Documents

flow rates

flow andenergy

rtd cable

energy use

energy transfer

energy totals

mass flow rate

precision rtd sensor