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Reference Manual00809-0100-4248, Rev AA

September 2010

Rosemount 248 Wireless Temperature

Transmitter




September 2010Rosemount 248 Wireless

tp-2

Failure to follow these installation guidelines could result in death or serious

injury:• Make sure only qualified personnel perform the installation.

Explosions could result in death or serious injury:

• Installation of this transmitter in an explosive environment must be in

accordance with the appropriate local, national, and international standards,

codes, and practices. Please review the approvals section of the 248

reference manual for any restrictions associated with a safe installation.

• Before connecting a Field Communicator in an explosive atmosphere, ensure the

instruments are installed in accordance with intrinsically safe or non-incendive

field wiring practices.

• Verify that the operating atmosphere of the transmitter is consistent with the

appropriate hazardous locations certifications.

Process leaks may cause harm or result in death.

• Do not remove the thermowell while in operation.

• Install and tighten thermowells and sensors before applying pressure.Electrical shock can result in death or serious injury.

• Avoid contact with the leads and terminals. High voltage that may be present on

leads can cause electrical shock.

This device complies with Part 15 of the FCC Rules. Operation is subject to the

following conditions:

• This device may not cause harmful interference.

• This device must accept any interference received, including interference thatmay cause undesired operation.

• This device must be installed to ensure a minimum antenna separation

distance of 20 cm from all persons.

The Power Module may be replaced in a hazardous area. The Power Module has

surface resistivity greater than one gigaohm and must be properly installed in the

wireless device enclosure. Care must be taken during transportation to and from the

point of installation to prevent electrostatic charge build-up.

NOTICE

The Rosemount 248 Wireless and all other wireless devices should be installed only

after the Smart Wireless Gateway has been installed and is functioning properly.

Wireless devices should also be powered up in order of proximity from the Smart

Wireless Gateway, beginning with the closest. This will result in a simpler and faster

network installation.

NOTICE

Shipping considerations for w ireless products:

The unit was shipped to you without the Power Module installed. Please remove the Power

Module prior to shipping the unit.

Each Power Module contains two “C” size primary lithium batteries. Primary lithiumbatteries are regulated in transportation by the U. S. Department of Transportation, and are

also covered by IATA (International Air Transport Association), ICAO (International Civil

Aviation Organization), and ARD (European Ground Transportation of Dangerous Goods).

It is the responsibility of the shipper to ensure compliance with these or any other local

requirements. Please consult current regulations and requirements before shipping.




September 2010

tp-3

Rosemount 248 Wireless

NOTICE

Power Module Considerations:

Each Power Module with the wireless unit contains two “C” size primary lithium/thionyl

chloride batteries. Each battery contains approximately 2.5 grams of lithium, for a total

of 5 grams in each pack. Under normal conditions, the battery materials are

self-contained and are not reactive as long as the batteries and the pack integrity are

maintained. Care should be taken to prevent thermal, electrical or mechanical damage.

Contacts should be protected to prevent premature discharge.

Battery hazards remain when cells are discharged.

Power Modules should be stored in a clean and dry area. For maximum Power Module

life, storage temperature should not exceed 30 °C.





tp-4




September 2010

TOC-1


SECTION 1Overview

Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Shipping considerations for wireless products: . . . . . . . . . . . . . . . 1-5

Product Recycling/Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

SECTION 2Configuration

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Sensor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Bench Top Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Device Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Join Device to Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Configure Update Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

HART Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Fast Key Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Remove Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

SECTION 3Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Wireless Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Power Up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Antenna Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Conduit Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Field Communicator Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Direct Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Remote Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Ground the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

SECTION 4Commissioning

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Verify Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Field Communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Smart Wireless Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

AMS™ Wireless Configurator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Table of Contents





TOC-2

SECTION 5Operation andMaintenance

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Power Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

SECTION 6Troubleshooting

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

APPENDIX ASpecifications andReference Data

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3

Ambient Temperature Effect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4

Dimensional Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-5

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

APPENDIX BProduct Certifications

Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . .B-1

Telecommunication Compliance . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

FCC and IC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

European Union Directive Information . . . . . . . . . . . . . . . . . . . . . .B-1

Ordinary Location Certification for FM . . . . . . . . . . . . . . . . . . . . . . B-1

Hazardous Locations Certificates. . . . . . . . . . . . . . . . . . . . . . . . . . B-2




September 2010 Rosemount 248 Wireless

www.rosemount.com

Section 1 Overview

Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Cons iderations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3

Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-4

Product Recyc ling/Disposal . . . . . . . . . . . . . . . . . . . . . . . page 1-5

USING THIS MANUAL The sections in this manual provide information on installing, operating, andmaintaining the Rosemount 248 Wireless temperature transmitter with

WirelessHART™ protocol. The sections are organized as follows:

• Section 2: Configuration provides instruction on commissioning andoperating 248 Wireless transmitters. Information on software functions,configuration parameters, and online variables is also included.

• Section 3: Installation contains mechanical and electrical installationinstructions.

• Section 4: Commissioning contains techniques for properlycommissioning the device.

• Section 5: Operation and Maintenance contains operation andmaintenance techniques.

• Section 6: Troubleshooting provides troubleshooting techniques forthe most common operating problems.

• Appendix A: Specif icati ons and Reference Data supplies referenceand specification data, as well as ordering information.

• Appendix B: Product Cert if ications contains approval information.

248 WIRELESS TRANSMITTER

Features of the Rosemount 248 Wireless include:

• An installation-ready solution that provides a variety of mountingoptions, transmitter configurations, and sensors/thermowells

• Flexibility to meet your most demanding applications

• Wireless output with >99% data reliability delivers rich HART data,protected by industry leading security

• Simple and easy installation practices already used today for robust

installations





1-2

Refer to the following literatures for a full range of compatible connectionheads, sensors, and thermowells provided by Emerson ProcessManagement.

• English Temperature Sensors and Assemblies Product Data Sheet,

Volume 1 (document number 00813-0100-2654)• Temperature Sensors and Accessories (Metric Sensors) Product Data

Sheet, Volume 2 (document number 00813-0200-2654)

SAFETY MESSAGES Instructions and procedures in this section may require special precautions toensure the safety of the personnel performing the operations. Information thatpotentially raises safety issues is indicated by a warning symbol ( ). Pleaserefer to the following safety messages before performing an operationpreceded by this symbol.

Warnings

Failure to follow these installation guidelines could result in death or

serious injury.

• Make sure only qualified personnel perform the installation.

Explosions could result in death or serious injury.

• Before connecting a Field Communicator in an explosive atmosphere, make sure

the instruments are installed in accordance with intrinsically safe or non-incendive




Process leaks could result in death or serious injury.


• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

• Avoid contact with the leads and terminals. High voltage that may be present on

leads can cause electrical shock.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following

conditions.


• This device must accept any interference received, including interference that may

cause undesired operations.

• This device must be installed to ensure a minimum antenna separation distance of

20 cm from all person.

The Power Module may be replaced in a hazardous area. The Power Module has surface

resistivity greater than one gigaohm and must be properly installed in the wireless device

enclosure. Care must be taken during transportation to and from the point of installation to

prevent electrostatic charge build-up.




September 2010

1-3


CONSIDERATIONS

General Electrical temperature sensors such as RTDs and thermocouples producelow-level signals proportional to their sensed temperature. With simple HART

configuration, the Rosemount 248 Wireless converts the low-level sensorsignal to a wireless-enabled signal.

Commissioning The transmitter can be commissioned before or after installation. It may beuseful to commission it on the bench, before installation, to ensure properoperation and to become familiar with its functionality. When applicable, makesure the instruments are installed in accordance with intrinsically safe ornon-incendive field wiring practices. The device will be powered whenever thepower module is installed. To avoid depleting the Power Module, make sure itis removed when the device is not in use.

Mechanical Location

When choosing an installation location and position, take into account the

need for access to the transmitter. For best performance, the antenna shouldbe vertical with some space between objects in a parallel metal plane such asa pipe or metal framework, as the pipes or framework may adversely affectthe performance of the antenna.

Electrical Power Module

The Rosemount 248 Wireless Temperature transmitter is self-powered. EachPower Module contains two “C” size primary lithium/thionyl chloride batteries.Each battery contains approximately 2.5 grams of lithium, for a total of 5grams in each pack. Under normal conditions, the battery materials areself-contained and are not reactive as long as the batteries and the PowerModule are maintained. Care should be taken to prevent thermal, electrical ormechanical damage. Contacts should be protected to prevent prematuredischarge.

Use caution when handling the power module, it may be damaged if droppedfrom heights in excess of 20 feet.


Power Modules should be stored in a clean and dry area. For maximumPower Module life, storage temperature should not exceed 30° C.

Sensor

Make sensor connections through the cable entry in the side of theconnection head. Be sure to provide adequate clearance for cover removal.

Environmental Verify that the operating atmosphere of the transmitter is consistent with theappropriate hazardous locations certifications.

Temperature Effects

The transmitter will operate within specifications for ambient temperaturesbetween –40 and 185 °F (–40 and 85 °C). Heat from the process istransferred from the thermowell to the transmitter housing. If the expectedprocess temperature is near or beyond specification limits, consider the use ofadditional thermowell and extension, or remote mounting the transmitter tothermally isolate it from the process.




September 2010

1-5


PRODUCT

RECYCLING/DISPOSAL

Recycling of equipment and packaging should be taken into consideration

and disposed of in accordance with local and national legislation/regulations.

NOTICE

Shipping considerations for wireless products:

The unit was shipped to you without the Power Module installed. Pleaseremove the Power Module prior to shipping the unit.

Each Power Module contains two “C” size primary lithium batteries.Primary lithium batteries are regulated in transportation by the U. S.Department of Transportation, and are also covered by IATA(International Air Transport Association), ICAO (International Civil

Aviation Organization), and ARD (European Ground Transportation ofDangerous Goods). It is the responsibility of the shipper to ensurecompliance with these or any other local requirements. Please consultcurrent regulations and requirements before shipping.





1-6





www.rosemount.com

Section 2 Configuration

Overv iew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1


Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-2

Sensor Connect ions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3

Bench Top Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-7

Device Network Con figurati on . . . . . . . . . . . . . . . . . . . . . page 2-9

HART Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-11

OVERVIEW This section contains information on configuration and verification that shouldbe performed prior to installation.

Field Communicator and AMS instructions are given to perform configuration

functions. For convenience, Field Communcator fast key sequences arelabeled “Fast Keys” for each software function below the appropriateheadings.

Sensor Input Trim Example


Electrical grounds are indicated on drawings by a ground symbol ( ). Always follow proper grounding practices.

Fast Key Sequence 1, 2, 3, etc.





2-2

Warnings

Failure to follow these installation guidelines could result in death or serious injury.


Explosions could result in death or serious injury.

• Before connecting a Field Communicator in an explosive atmosphere, make surethe instruments are installed in accordance with intrinsically safe or non-incendive




Process leaks could result in death or serious injury.


• Install and tighten thermowells and sensors before applying pressure

Electrical shock could cause death or serious injury.

• Avoid contact with the leads and terminals. High voltage that may be present onleads can cause electrical shock.


conditions:



cause undesired operation.


20 cm from all persons.

The Power Module may be replaced in a hazardous area. The Power Module has surface

resistivity greater than one gigaohm and must be properly installed in the wireless device

enclosure. Care must be taken during transportation to and from the point of installation to

prevent electrostatic charge build-up.




September 2010

2-3


SENSOR CONNECTIONS The 248 Wireless is compatible with a number of RTD and thermocouplesensor types. Figure 2-1 shows the correct input connections to the sensorterminals on the transmitter. To ensure a proper sensor connection, anchorthe sensor lead wires into the appropriate compression terminals and tighten

the screws.

Thermocouple or Millivolts Inputs

The thermocouple can be connected directly to the transmitter. Useappropriate thermocouple extension wire if mounting the transmitter remotelyfrom the sensor. Make millivolt inputs connections with copper wire. Useshielding for long runs of wire.

RTD or Ohm Inputs

The transmitters will accept a variety of RTD or ohmic configurations,including 2-wire, 3-wire or 4-wire connections. If the transmitter is mountedremotely from a 3-wire or 4-wire RTD, it will operate within specifications,without recalibration, for lead wire resistances of up to 5 ohms per lead

(equivalent to 500 feet of 20 AWG wire). In this case, the leads between theRTD and transmitter should be shielded. If using a 2-wire connection, bothRTD leads are in series with the sensor element, so significant errors canoccur if the lead lengths exceed three feet of 20 AWG wire (approximately0.05 C/ft.). For longer runs, attach a third or fourth lead to achieve a 3-wire or4-wire connection as described above.

Sensor Lead Wire Resistance Effect—RTD Input

When using a 4-wire RTD, the effect of lead resistance is eliminated and hasno impact on accuracy. However, a 3-wire sensor will not fully cancel leadresistance error because it cannot compensate for imbalances in resistancebetween the lead wires. Using the same type of wire on all three lead wireswill make a 3-wire RTD installation as accurate as possible. A 2-wire sensor

will produce the largest error because it directly adds the lead wire resistanceto the sensor resistance. For 2- and 3-wire RTDs, an additional lead wireresistance error is induced with ambient temperature variations. The table andthe examples shown below help quantify these errors.

Table 2-1. Examples of Approximate Basic Error Sensor Input Approximate Basic Error

4-wire RTD Negligible (independent of lead wire resistance up to 5 per lead

3-wire RTD ± 1.0 in reading per ohm of unbalanced lead wire resistance

(Unbalanced lead wire resistance = maximum imbalance between

any two leads.)

2-wire RTD 1.0 in reading per ohm of lead wire resistance





2-4

Figure 2-1. Sensor WiringDiagrams

*Emerson Process Management provides 4-wire sensors for all single element RTDs.

Use these RTDs in 3-wire or 2-wire configurations by leaving the unneeded leads dis-

connected and insulated with electrical tape.

Thermocouple and mV 4-Wire RTD and

3-Wire RTD and 2-Wire RTD and

248 Wireless Sensor Connections Diagram

T/C and mV4-wire RTD and 3-wire RTD and 2-wire RTD and

2 3 41 2 3 41 2 3 412 3 41




September 2010

2-5


Figure 2-2. Rosemount 65,68Q, 78 Standard and HighTemp, 58C and 68 RTD LeadWire Configurations

Figure 2-3. Rosemount 183Thermocouple Lead WireConfiguration

Figure 2-4. Rosemount 185Thermocouple Lead WireConfigurations

Note:

Wire color examples apply to Rosemount sensors, but will vary by manufacturer.

Single Element

White (1)

White (2)

Red (3)

Red (4)

Type J Type E

Type K Type T

+ White (2)

– Red (3)

+ Purple (2)

– Red (3)

+ Yellow (2)

– Red (3)

+ Blue (2)

– Red (3)

Type J Type N

Type K

+ Black (2)

– White (3)

+ Red (2)

– Whi te (3)

+ Green (2)

– White (3)





2-6

Examples of Approximate Lead Wire Resistance Effect Calculations

Given:a Pt100 RTD, 0.00385Total cable length 150 m

Imbalance of the lead wires at 20 C 0.5

Resistance/length (18 AWG Cu): 0.025 /mTemperature coefficient of Cu (Cu) 0.039 / CTemperature coefficient of Pt (Pt) 0.00385 / CChange in Ambient Temperature (Tamb) 25 CRTD Resistance at 0 C (R0) 100 (for Pt 100 RTD)

• Pt100 4-wire RTD: No lead wire resistance effect

• Pt100 3-wire RTD:

• Pt100 2-wire RTD:

Imbalance of Lead Wires(Pt x R0)

Basic Error =

Error due to amb. temperature variation = (

Cu) x (

Tamb) x (Imbalance of Lead Wires)(Pt x R0)

Lead wire imbalance seen by the transmi tter = 0.5

Basic Error = 0.5

(0.00385 / C) x (100 ) = 1.3 °C

Error due to amb. temp. var. of ±25 C =

(0.0039 / C) x (25 C) x (0.5 )(0.00385 / C) x (100 )

= ±0.1266 C

Imbalance of Lead Wires(Pt x R0)

Basic Error =

Error due to amb. temperature variation = (Cu) x (Tamb) x (Lead Wire Resistance)(Pt x R0)

Lead wi re resistance seen by the transmi tter = 150 m x 2 wi res x0.025 /m = 7.5

Basic Error = 7.5

(0.00385 / C) x (100 ) = 19.5 °C

Error due to amb. temp. var. of ±25 C =

(0.0039 / C) x (25 C) x (7.5 )(0.00385 / C) x (100 )

= ± 1.9 C




September 2010

2-7


Sensor Leads

If the sensor is installed in a high-voltage environment and a fault condition orinstallation error occurs, the sensor leads and transmitter terminals couldcarry lethal voltages. Use extreme caution when making contact with the

leads and terminals.

Use the following steps to wire the sensor and supply power to thetransmitter:

1. Remove the transmitter enclosure cover (if applicable).

2. Attach the sensor leads according to the wiring diagrams.

3. Connect the Power Module.

4. Verify the connection.

5. Reattach and tighten the cover (if applicable).

BENCH TOP

CONFIGURATION

The Power Module must be installed to provide power to the 248 Wireless for

configuration. Begin by removing the Power Module-side housing cover,indicated as “Field Terminals” by text located on the side of the device. Thiswill expose the terminal block and HART communication terminals. Connectthe Power Module to supply power for configuration. See Figure 2-5.

Configuration of the 248 Wireless may be performed either directly orremotely. Direct configuration can be performed using a Field Communicator,

AMS Device Manager, AMS Wireless Configurator or any WirelessHARTCommunicator.

Remote configuration can be performed using AMS Device Manager, AMSWireless Configurator or the Smart Wireless Gateway.

Figure 2-5. Connection Diagram

for Rosemount Wireless andField Communicator





2-8

Field Communicator

If performing device configuration directly, connect the bench equipment asshown in Figure 2-5 above, and turn on the Field Communicator by pressingthe ON/OFF key. When using a Field Communicator, any configuration

changes must be sent to the transmitter by using the Send key (F2).

The Field Communicator will search for a HART-compatible device andindicate when the connection is made. If the Field Communicator fails toconnect, it will indicate that no device was found. If this occurs, refer toSection 6: Troubleshooting.

AMS Device Manager and AMS Wireless Configurator

When configuring the 248 Wireless using AMS Device Manager or AMSWireless Configurator, double click the 248 Wireless device icon (or right clickand select Con

/Setup), then choose the Configure Menu. AMS configuration changes areimplemented when the Apply button is clicked.

During direct connection configuration, AMS will search for aHART-compatible device and indicate when the connection is made. If AMSfails to connect, it indicates that no device was found. If this occurs, refer toSection 6: Troubleshooting.

Smart Wireless Gateway

The Rosemount 248 Wireless supports limited remote configuration throughthe Smart Wireless Gateway. The Gateway allows configuration of thefollowing device parameters: HART Tag, Short Tag, Descriptor, EngineeringUnits, Update Rate and Range Values.

DEVICE SENSOR CONFIGURATION

Every temperature sensor has unique characteristics. In order to ensure themost accurate measurement, the Rosemount 248 Wireless should beconfigured to match the specific sensor that it will be connected to. Prior toinstallation, verify the configuration and connection settings of thetemperature sensor through a Field Communicator or AMS.

DEFAULT SETTINGS

The 248 Wireless default configuration is shown below:

NOTE:The C1 option code can be used to enable factory configuration of the UpdateRate, Date, Descriptor and Message fields. This code is not required to havethe factory configure the Sensor Type, Connection or the Self OrganizingNetwork parameters.

Sensor Type Pt 100 (= 0.00385)

Engineering Units C

Number of Lead Wires 4

Network ID Factory Generated Network Parameters

Join Key Factory Generated Network ParametersUpdate Rate 1 Minute





2-10

Figure 2-7. Field CommunicatorConnections

For HART communication, a 248 Wireless DD is required.




September 2010

2-11


HART Menu Tree

Figure 2-8. Field Communicator Menu Tree





2-12

Fast Key Sequence Table 2-2 lists the fast key sequences for common transmitter functions.

NOTE:The fast key sequences assume that DD Dev v2, DD v1 is being used.

Table 2-2. 248 Wireless FastKey Sequence

Calibration Calibrating the transmitter increases the measurement precision by allowingcorrections to be made to the factory-stored characterization curve by digitallyaltering the transmitter’s interpretation of the sensor input.

To understand calibration, it is necessary to understand that smarttransmitters operate differently from analog transmitters. An importantdifference is that smart transmitters are factory-characterized, meaning thatthey are shipped with a standard sensor curve stored in the transmitterfirmware. In operation, the transmitter uses this information to produce a

process variable output, in engineering units, dependent on the sensor input.

Calibration of the 248 Wireless may include the following procedure:

• Sensor Input Trim: Digitally alter the transmitter’s interpretation of theinput signal

Trim the Transmitter

The Sensor Input Trim function may be used when calibrating.

Sensor Calibration

Perform a sensor trim if the transmitters digital value for the primary variabledoes not match the plant’s standard calibration equipment. The sensor trim

function calibrates the sensor to the transmitter in temperature units or rawunits. Unless your site-standard input source is NIST-traceable, the trimfunctions will not maintain the NIST-traceability of the system.

The Sensor Input Trim command allows the transmitter’s interpretation of theinput signal to be digitally altered. The sensor reference command trims, inengineering (F, C,R, K) or raw (, mV) units, the combined sensor andtransmitter system to a site standard using a known temperature source.Sensor trimming is suitable for validation procedures or for applications thatrequire calibrating the sensor and transmitter together.

Function Key Sequence Menu Items

Device Information 1, 2, 5 Network, Field Device Info, Sensor Information

PV Range Values 2, 2, 3 PV LRV, PV URV, LSL, USL

Lower Range Value 2, 2, 3, 5 Set the temperature for the 0% point to configure the

Percent of Range

Upper Range Value 2, 2, 3, 4 Set the temperature for the 100% point to configure the

Percent of Range

Sensor Trim

(Calibration)

2, 1, 4 Lower Sensor Trim, and Upper Sensor Trim

Wireless Network 2, 2, 1 Network ID, Join Device to Network, Power Mode,

Broadcast RatesSensor

Configuration

2, 1, 3 Sensor Configuration, Temp Sensor Setup, Sensor S/N

Fast Keys 3, 4, 1




September 2010

2-13


Use the following procedure to perform a sensor trim with a 248 Wireless:

1. Connect the calibration device or sensor to the transmitter. Refer toFigure 2-1 on page 2-4 or on the device terminal block for sensorwiring diagrams.

2. Connect the communicator to the transmitter.

3. From the Home screen, select Service Tools, Maintenance, SensorCalibration to prepare to trim the sensor.

4. Select 3 Lower Sensor Trim or 4 Upper Sensor Trim. (Note: It isrecommended to perform lower offset trims first, before performingupper slope trims).

5. Answer the question about using an active calibrator or not.

6. Select the appropriate sensor trim units at the prompt.

7. Adjust the calibration device to the desired trim value (must be withinthe selected sensor limits). If a combined sensor and transmittersystem are being trimmed, expose the sensor to a known

temperature and allow the temperature reading to stabilize. Use abath, furnace or isothermal block, measured with a site-standardthermometer, as the known temperature source.

8. Select OK once the temperature stabilizes. The communicatordisplays the output value the transmitter associates with the inputvalue provided by the calibration device.

9. Enter the trim point.

AMS

For AMS, configure the sensor as indicated above.

From the Overview Screen click on the Calibrate button. Select “Lower InputTrim” or “Upper Limit Trim.”

The wizard will continue through the process.

The transmitter may be restored to the factory default by selecting:“Service Tools>Maintenance>Sensor Calibration>Recall Factory Trim.”

The wizard will revert the transmitter to the factory trim for a given sensor.

Apply changes.

REMOVE POWERMODULE

After the sensor and network have been configured, remove the PowerModule and replace the transmitter cover. The Power Module should beinserted only when the device is ready to be commissioned. Use cautionwhen handling the Power Module. The Power Module may be damaged ifdropped from heights in excess of 20 ft.





2-14





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Section 3 Installation


Wireless Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3

Field Communicator Connect ions . . . . . . . . . . . . . . . . . . page 3-4

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-5

Physical Instal lation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3-5

Direct Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6

Remote Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-7

Ground the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-8

SAFETY MESSAGES Instructions and procedures in this section may require special precautions toensure the safety of the personnel performing the operations. Information that

potentially raises safety issues is indicated by a warning symbol ( ). Pleaserefer to the following safety messages before performing an operationpreceded by this symbol.





3-2

Warnings

Failure to follow these installation guidelines could result in death or serious injury:• Make sure only qualified personnel perform the installation.


• Installation of this transmitter in an explosive environment must be in accordance

with the appropriate local, national, and international standards, codes, andpractices. Please review the approvals section of the 248 reference manual for any

restrictions associated with a safe installation.


instruments are installed in accordance with intrinsically safe or non-incendive field

wiring practices.






• Avoid contact with the leads and terminals. High voltage that may be present on leads

can cause electrical shock.


conditions:






• The Power Module may be replaced in a hazardous area. The Power Module hassurface resistivity greater than one gigaohm and must be properly installed in the

wireless device enclosure. Care must be taken during transportation to and from

the point of installation to prevent electrostatic charge build-up.




September 2010

3-5


MOUNTING The Rosemount 248 Wireless can be installed in one of two configurations:Direct Mount, where the sensor is connected directly to the 248 Wirelesshousing’s conduit entry, or Remote Mount, where the sensor is mountedseparate from the 248 Wireless housing, then connected to the 248 Wireless

via conduit. Choose the installation sequence that corresponds to themounting configuration.

Figure 3-4 provides an example of the relationship between transmitterhousing temperature rise and extension length.

Figure 3-4. 248 WirelessTransmitter Connection HeadTemperature Rise vs. ExtensionLength

Example

The transmitter specification limit is 85 °C. If the ambient temperature is 55 °Cand the max process temperature to be measured is 815 °C, the maximum

permissible connection head temperature rise is the transmitter specificationlimit minus the ambient temperature (moves 85 to 55 °C), or 30 °C.

In this case, an extension of 5” meets this requirement, but 6” provides anadditional margin of thermowell protection, thereby reducing risk of ambientthermal damage.

PHYSICALINSTALLATION

The Rosemount 248 Wireless can be installed in one of two configurations:Direct Mount, where the thermocouple or sensor is connected directly to the248 Wireless housing’s conduit entry, or Remote Mount, where thethermocouple or sensor is mounted separate from the 248 Wireless housing,then connected to the 248 Wireless via conduit. Choose the installationsequence that corresponds to the mounting configuration.

Upon installation of the 248 Wireless, ensure that each conduit entry is eithersealed with a conduit plug using an approved thread sealant, or has aninstalled conduit fitting or cable gland with approved thread sealant.

H o u s i n g T e m p e r a t u r e R i s e ,

A b o v e

A m b i e n t ° C

( ° F )

3 4 5 6 7 8 90 (32)

60 (140)

50 (122)

40 (104)

30 (86)

20 (68)

10 (50)

4.2

55

Extension Length (in.)

815 °C (1500 °F) Process Temperature

540 °C (1000 °F) Process Temperature

250 °C (482 °F) Process Temperatu re





3-6

Direct Mount The direct mount installation should not be used when installing with aSwagelok® fitting.

1. Install the sensor according to standard installation practices. Be sureto use an approved thread sealant on all connections.

2. Attach the 248 Wireless housing to the sensor using the threadedconduit entry.

3. Attach the sensor wiring to the terminals as indicated on the wiringdiagram.

4. Connect the Power Module.

NOTE:Wireless devices should be powered up in order of proximity from the SmartWireless Gateway, beginning with the closest device to the Gateway. This willresult in a simpler and faster network installation.

5. Close the housing cover and tighten to safety specification. Always

ensure a proper seal by installing the electronics housing covers sothat metal touches metal, but do not over tighten.

6. Position the antenna such that it is vertical, either straight up orstraight down. The antenna should be approximately 3 ft. (0,91 m)from any large structures or buildings, to allow clear communicationto other devices.

Note: Possible antenna rotationshown. Antenna rotation allows bestpractices for any configuration.





3-8

Ground the Transmitter The transmitter will operate with the housing either floating or grounded.However, the extra noise in floating systems affects many types of readoutdevices. If the signal appears noisy or erratic, grounding the transmitter at asingle point may solve the problem.

The electronics enclosure should be grounded in accordance with local andnational installation codes. This can be accomplished via the processconnection, via the internal case grounding terminal, or via the externalgrounding terminal.

Thermocouple, mV, and RTD/Ohm Inputs

Each process installation has different requirements for grounding. Use thegrounding options recommended by the facility for the specific sensor type, orbegin with grounding Option 1 (the most common).

Option 1:

1. Connect sensor wiring shield to the transmitter housing (only if thehousing is grounded).

2. Ensure the transmitter housing is electrically isolated from the sensorwiring.

Shield Ground Point




September 2010

3-9


Option 2:

1. Ground sensor wiring shield at the sensor.

2. Ensure that the sensor wiring and shield is electrically isolated fromthe transmitter housing.

NOTE: Always use facility recommended wiring practices.

Shield Ground Point





3-10





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Section 4 Commissioning


Veri fy Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-2

AMS™ Wireless Conf igurato r . . . . . . . . . . . . . . . . . . . . . . page 4-3

Troubleshoot ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-3

Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-4


Warnings

Failure to follow these installation guidelines could result in death or serious injury:




with the appropriate local, national, and international standards, codes, and

practices. Please review the approvals section of the 248 reference manual for any




wiring practices.• Verify that the operating atmosphere of the transmitter is consistent with the




• Install and tighten thermowells and sensors before applying pressure.

Electrical shock can result in death or serious injury.




conditions:






• The Power Module may be replaced in a hazardous area. The Power Module has








4-2

NOTEThe Rosemount 248 Wireless and all other wireless devices should beinstalled only after the Smart Wireless Gateway has been installed and isfunctioning properly.

Wireless devices should also be powered up in order of proximity from theSmart Wireless Gateway, beginning with the closest device to the Gateway.This will result in a simpler and faster network installation.

VERIFY OPERATIONS Operation can be verified in three locations: by using the Field Communicator,at the Smart Wireless Gateway’s integrated web interface or via AMS™ Wireless Configurator.

Field Communicator To verify operation using a Field Communicator, refer to the Fast KeySequence in Table 4-1. Select the Communication Status parameter to verifyoperation. For connecting a 248 Wireless to a Field Communicator, refer toFigure 3-3 on page 3-4.

Smart Wireless Gateway In the integrated web interface from the Gateway, navigate to theExplorer>Status page. This page shows whether the device has joined thenetwork and if it is communicating properly.

NOTE:It may take several minutes for the device to join the network.

NOTE:If the device joins the network and immediately has an alarm present, it islikely due to sensor configuration. Check the sensor wiring (see Rosemount248 Wireless Terminal Diagram on page 4-4) and the sensor configuration(see 248 Wireless Fast Key Sequence on page 4-2).

Table 4-1. 248 Wireless Fast Key SequenceFunction Key Sequence Menu Items

Communications 3,3 Join Status, Communication Status,

Join Mode, Number of Available

Neighbors, Number of Advertisements

Heard, Number of Join Attempts




September 2010

4-3


Figure 4-1. Smart WirelessGateway Network Settings

AMS™ WIRELESSCONFIGURATOR

When the device has joined the network, it will appear in the WirelessConfigurator window as illustrated below.

TROUBLESHOOTING If the device is not joined to the network after power up, verify the correctconfiguration of the Network ID and Join Key, and verify that Active

Advertising has been enabled on the Smart Wireless Gateway. The NetworkID and Join Key in the device must match the Network ID and Join Key of theGateway.

The Network ID and Join Key may be obtained from the Gateway on the

Setup>Network>Settings page on the web server (see Figure 4-1 onpage 4-3). The Network ID and Join Key may be changed in the wirelessdevice by using the following Fast Key sequence.

Function Key Sequence Menu Items

Join Device to Network 2,1,1 Join Device to Network





4-4

REFERENCEINFORMATION

Figure 4-2. Rosemount 248Wireless Terminal Diagram

NOTE:In order to communicate with a Field Communicator, the device must be

powered by connecting the Power Module.

Table 4-2. RosemountWirelessHART 248 Fast KeySequences Function

Key

Sequence Menu Items

Device

Information

2,2,5,3 Manufacturer, Model, Final Assembly Number,

Universal, Field Device, Software, Hardware,

Descriptor, Message, Date, Model Number I, Model

Number II, Model Number III, SI Unit Restriction,

Country, Device ID

Guided Setup 2, 1 Join Device to Network, Configure Update Rate,

Configure Sensor, Calibrate Sensor

Manual Setup 2, 2 Wireless, Process Sensor, Percent of Range, DeviceTemperatures, Device Information, Other

Wireless

Configuration

2, 2, 1 Network ID, Join Device to Network, Update Rate,

Configure Broadcast Power Level, Power Mode,

Power Source

Sensor

Calibration

3, 4, 1 Current Upper Trim, Current Lower Trim, Lower

Sensor Trim, Upper Sensor Trim, Recall Factory Trim,

RTD 2 Wire Offset





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Section 5 Operation and Maintenance


Power Module Replacement . . . . . . . . . . . . . . . . . . . . . . . page 5-2


Warnings

Failure to follow these installation guidelines could result in death or serious injury:




with the appropriate local, national, and international standards, codes, and

practices. Please review the approvals section of the 248 reference manual for any




wiring practices.





• Install and tighten thermowells and sensors before applying pressure.

Electrical shock can result in death or serious injury.




conditions:






• The Power Module may be replaced in a hazardous area. The Power Module has


wireless device enclosure. Care must be taken during transportation to and fromthe point of installation to prevent electrostatic charge build-up.





5-2

POWER MODULEREPLACEMENT

Expected Power Module life is 10 years at reference conditions.(1)

When Power Module replacement is required, remove the cover on the fieldterminal side and remove the Power Module. Replace the Power Module (partnumber 00753-9220-0001) and replace the cover. Tighten to specification and

verify operation.

Handling Considerations

Each Power Module with the wireless unit contains two “C” size primarylithium/thionyl chloride batteries. Each battery contains approximately 2.5grams of lithium, for a total of 5 grams in each pack. Under normal conditions,the battery materials are self-contained and are not reactive as long as thebatteries and the pack integrity are maintained. Care should be taken toprevent thermal, electrical or mechanical damage.

Contacts should be protected to prevent premature discharge.

Power Modules should be stored in a clean and dry area. For maximumPower Module life, storage temperature should not exceed 30 °C.

Use caution when handling the power module, it may be damaged if droppedfrom heights in excess of 20 feet.


Environmental Considerations

As with any battery, local environmental rules and regulations should beconsulted for proper management of spent batteries. If no specificrequirements exist, recycling through a qualified recycler is encouraged.Consult the materials safety data sheet for battery specific information.

Shipping Considerations

The unit was shipped to you without the Power Module installed. Pleaseremove the Power Module prior to shipping the unit.

(1) Reference conditions are 70° F (21° C), transmit rate of once per minute, and routing data

for three additional network devices.





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Section 6 Troubleshooting

Overv iew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-1


Rosemount 248 Wireless Device Status Information . . . page 6-3

Rosemount 248 Wireless Troubleshooting . . . . . . . . . . . page 6-4

Wireless Network Troubleshoot ing . . . . . . . . . . . . . . . . . . page 6-4

OVERVIEW Table 6-2 provides summarized maintenance and troubleshootingsuggestions for the most common operating problems. If you suspectmalfunction despite the absence of any diagnostic messages on the FieldCommunicator display, follow the procedures described here to verify thattransmitter hardware and process connections are in good working order.

Always deal with the most likely checkpoints first.

SAFETY MESSAGES Procedures and instructions in this section may require special precautions toensure the safety of the personnel performing the operations. Information thatraises potential safety issues is indicated by a warning symbol ( ). Refer tothe following safety messages before performing an operation preceded bythis symbol.





6-2

Warnings

Failure to follow these installation guidelines could result in death or serious injury:• Make sure only qualified personnel perform the installation.



with the appropriate local, national, and international standards, codes, andpractices. Please review the approvals section of the 248 reference manual for any




wiring practices.









conditions:






• The Power Module may be replaced in a hazardous area. The Power Module hassurface resistivity greater than one gigaohm and must be properly installed in the






September 2010

6-3


Table 6-1. Rosemount 248 Wireless Device Status Information

Device Status Description Recommended Action

Electronics Failure An electronics error that could impact the device

measurement reading has occurred.

1. Reset the device

2. Reconfirm all configuration items in the device

3. If the condition persists, replace the electronics

Terminal Block Failure A critical failure has occurred in the transmitter's

terminal block

1. Reset the device

2. Replace the terminal block

Sensor FailureThe device has detected an open, short, or too

much resistance for this sensor.

1. Verify the sensor connection and wiring. Refer to the

wiring diagrams found on the terminal cover to ensure

proper wiring.

2. Verify the integrity of the sensor and sensor lead wires.

If the sensor is faulty, repair or replace the sensor.

3. Reconfirm sensor configuration

4. Replace the sensor

5. If problem persists, replace the electronics

Radio FailureThe wireless radio has detected a failure or

stopped communicating.

1. Reset the device


Supply Voltage FailureThe supply voltage is too low for the device to

broadcast updates.

1. Replace the Power Module

Electronics Warning

The device has detected an electronics error that

does not currently impact the device measurement

reading.

1. Reset the device



Sensor has Exceeded

Limits

The sensor has exceeded the maximum

measurement range.

1. Check process for possible saturation condition

2. Verify that the appropriate sensor was chosen for the

application

3. Reconfirm sensor configuration

4. Reset the device

5. Replace the sensor

Electronics Temperatures

has Exceeded Limits

The electronics temperature has exceeded the

transmitter's maximum range.

1. Verify environmental temperature is within the

transmitter’s range

2. Remote mount the transmitter away from process and

environmental conditions3. Reset the device


Terminal Temperature has

Exceeded Limits

The terminal temperature has exceed the

transmitter's maximum range

1. Verify environmental temperature is within the

transmitter’s range

3. Remote mount the transmitter away from process and

environmental conditions

4. Reset the device


Supply Voltage LowThe supply voltage is low and may soon affect

broadcast updates

1. Replace the Power Module

Database Memory

Warning

The device has failed to write to the database

memory. Any data written during this time may

have been lost.

1. Reset the device


3. If logging dynamic data not needed, this advisory can

be safely ignored


Invalid ConfigurationThe device has detected a configuration error

based on a change to the device.

1. Click on details for more information

2. Correct the parameter that has a configuration error

3. Reset the device


Button Stuck A buttons on the Electronics Board is detected as

stuck in the active position.

1. Check the buttons for obstructions

2. Reset the device


Simulation ActiveThe device is in simulation mode and may not be

reporting actual information.

1. Verify that simulation is no longer required

2. Disable Simulation mode in Service Tools

3. Reset the device





6-4

Table 6-2. Rosemount 248Wireless Troubleshooting

Table 6-3. Wireless NetworkTroubleshooting

Symptom Potential Source Recommended Action

High Output Temperature Detected

Sensor Input Failure or Connection

Connect a Field Communicator and enter the transmittertest mode to isolate a sensor failure.

Check for a sensor open or short circuit.

Check the process variable to see if it is out of range.

Electronics Module

Connect a Field Communicator and enter the transmitter

status mode to isolate module failure.

Connect a 375 Field Communicator and check the sensor

limits to ensure calibration adjustments are within the

sensor range.

Digital Temperature Output i s

ErraticWiring

Check sensor wiring integrity at all junctions to insure

proper connections.

Electronics ModuleConnect a Field Communicator and enter the transmitter

test mode to isolate module failure.

Low Output or No Output

Sensor Element

Connect a Field Communicator and enter the Transmitter

test mode to isolate a sensor failure.

Check the process variable to see if it is out of range.

Electronics Module

Connect a Field Communicator and check the sensor limits

to ensure calibration adjustments are within the sensor

range.

Connect a Field Communicator and enter the Transmitter

test mode to isolate an electronicsmodule failure.

Symptom Recommended Action

Device not joining the network Verify network ID and join key

Wait longer (30 min.)

Enable High Speed Operation on Smart Wireless Gateway

Check Power Module

Verify device is within range of at least one other device

Verify network is in active network advertise

Power Cycle device to try again

Verify device is configured to join. Send the “Force Join” command to the device

See troubleshooting section of Smart Wireless Gateway for more information

Short battery life Check that “Power Always On” mode is off

Verify device is not installed in extreme temperatures

Verify that device is not a network pinch point

Check for excessive network rejoins due to poor connectivity

Limited Bandwidth Error

Reduce the Update Rate on transmitter

Increase communication paths by adding more wireless points

Check that device has been online for at least an hour

Check that device is not routing through a “limited” routing node

Create a new network with an additional Smart Wireless Gateway





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Appendix A Specifications andReference Data

Specificati ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page A-1

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-5

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-6

SPECIFICATIONS

FunctionalSpecifications

Input

Supports Thermocouple, RTD, millivolt and ohm input types. See Accuracy on

page A-3 for sensor options.

Output

Wireless enabled, linear with temperature or input.

Humidity Limits

0–99% relative humidity

Update Rate

User selectable, 8 sec. to 60 min.

Accuracy

(PT 100 @ reference conditions: 20 °C)

±0.45 °C (±0.81 °F)

Physical Specifications Electrical Connections / Power Module

• Replaceable, non-rechargeable, Intrinsically Safe Lithium-ThionylChloride Power Module with PBT enclosure.

• 10 year Power Module life at reference conditions.(1)

• 4 Screw Terminals for sensor connection.

Field Communicator Connections

Communication Terminals

Clips permanently fixed to terminal block

Materials of Construction

Enclosure

Housing

• Low-copper aluminum

(1) Reference conditions are 70° F (21° C), transmit rate of once per minute, and routing data

for three additional network devices.





A-2

Paint

• Polyurethane

Cover O-ring

• Buna-NTerminal Block and Power Module

• PBT

Antenna

• PBT/PC integrated omnidirectional antenna

Mounting

Transmitters may be attached directly to the sensor. Mounting brackets also

permit remote mounting. See “Dimensional Drawings” on page A-5.

Weight

3.03 lbs. (1.38 kg)

Enclosure Ratings (248 Wireless)

Enclosure option code D is rated Type 4X and IP66/IP67.

PerformanceSpecifications

EMC (ElectroMagnetic Compatibilit y)

The 248 Wireless meets all requirements listed under IEC 61326.

Transmitter Stabili ty

The 248 Wireless has a stability of ±0.15% of output reading or 0.15 °C

(whichever is greater) for 12 months

Self Calibration

The analog-to-digital measurement circuitry automatically self-calibrates foreach temperature update by comparing the dynamic measurement

to extremely stable and accurate internal reference elements.

Vibration Effect

No effect when tested per the requirements of IEC60770-1: High Vibration

Level - field or pipeline (10-60 Hz 0.21mm displacement peak amplitude /

60-2000 Hz 3g).




September 2010

A-3


Accuracy

Table A-1. Rosemount 248 Wireless Input Options and Accuracy.

Sensor

Options

Sensor

Reference

Input

Ranges

Digital

Accuracy (1)

2-, 3-, 4-wire RTDs °C °F °C °F

Pt 100 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.45 ± 0.81

Pt 200 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.45 ± 0.81

Pt 500 ( = 0.00385) IEC 751 –200 to 850 –328 to 1562 ± 0.57 ± 1.026

Pt 1000 ( = 0.00385) IEC 751 –200 to 300 –328 to 572 ± 0.57 ± 1.026

Pt 100 ( = 0.003916) JIS 1604 –200 to 645 –328 to 1193 ± 0.45 ± 0.81

Pt 200 ( = 0.003916) JIS 1604 –200 to 645 –328 to 1193 ± 0.81 ± 1.458

Ni 120 Edison Curve No. 7 –70 to 300 –94 to 572 ± 0.45 ± 0.81

Cu 10 Edison Copper Winding No. 15 –50 to 250 –58 to 482 ± 4.16 ± 7.488

Pt 50 ( = 0.00391) GOST 6651-94 –200 to 550 –328 to 990 ± 0.9 ± 1.62

Pt 100 ( = 0.00391) GOST 6651-94 –200 to 550 –328 to 990 ± 0.45 ± 0.81

Cu 50 ( =0.00426) GOST 6651-94 –50 to 200 –122 to 392 ± 1.44 ± 2.592

Cu 50 ( = 0.00428) GOST 6651-94 –185 to 200 –365 to 392 ± 1.44 ± 2.592

Cu 100 ( = 0.00426) GOST 6651-94 –50 to 200 –122 to 392 ± 0.72 ± 1.296

Cu 100 ( = 0.00428) GOST 6651-94 –185 to 200 –365 to 392 ± 0.72 ± 1.296

Thermocouples(2)

Type B(3) NIST Monograph 175, IEC 584 100 to 1820 212 to 3308 ± 2.25 ± 4.05

Type E NIST Monograph 175, IEC 584 –50 to 1000 –58 to 1832 ± 0.60 ± 1.08

Type J NIST Monograph 175, IEC 584 –180 to 760 –292 to 1400 ± 1.05 ± 1.89

Type K(4) NIST Monograph 175, IEC 584 –180 to 1372 –292 to 2502 ± 1.46 ± 2.628

Type N NIST Monograph 175, IEC 584 –200 to 1300 –328 to 2372 ± 1.46 ± 2.628

Type R NIST Monograph 175, IEC 584 0 to 1768 –32 to 3214 ± 2.25 ± 4.05

Type S NIST Monograph 175, IEC 584 0 to 1768 –32 to 3214 ± 2.1 ± 3.78

Type T NIST Monograph 175, IEC 584 –200 to 400 –328 to 752 ± 1.05 ± 1.89

DIN Type L DIN 43710 –200 to 900 –328 to 1652 ± 1.05 ± 1.89

DIN Type U DIN 43710 –200 to 600 –328 to 1112 ± 1.05 ± 1.89

Type W5Re/W26Re ASTM E 988-96 0 to 2000 –32 to 3632 ± 2.1 ± 3.78GOST Type L GOST R 8.585-2001 –200 to 800 –392 to 1472 ± 1.80 ± 3.24

Other Sensor Types

Millivolt Input –10 to 100 mV ± 0.045 mV

2-, 3-, 4-wire Ohm Input 0 to 2000 ohms ± 1.35 ohm

(1) The published digital accuracy applies over the entire sensor input range. Digital output can be accessed by HART Communications or wireless protocol.(2) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.8 °C. (cold junction accuracy).(3) Digital accuracy for NIST Type B T/C is ±9.0 °C (±16.2 °F) from 100 to 300 °C (212 to 572 °F).(4) Digital accuracy for NIST Type K T/C is ±2.1 °C (±3.79 °F) from –180 to –90 °C (–292 to –130 °F).





A-4

Ambient Temperature Effect

Transmitters can be installed in locations where the ambient temperature is between –40 and 85 °C (–40 and 185 °F). In order to maintain

excellent accuracy performance, each transmitter is individually characterized over this ambient temperature range at the factory.

Temperature Effects Example

When using a Pt 100 ( = 0.00385) sensor input at 30 °C ambient temperature:

• Digital Temperature Effects: 0.009 °C x (30 - 20) = 0.09 °C

• Worst Case Error: Digital + Digital Temperature Effects = 0.45 °C + 0.09 °C = 0.54 °C

• Total Probable Error:

Table A-2. Rosemount 248 Wireless Ambient Temperature Effect

Sensor Options

Sensor

Reference

Input Range

(°C)

Temperature Effects per 1.0 °C (1.8 °F)

Change in Ambi ent Temperature(1) Range

2-, 3-, 4-wire RTDs

Pt 100 ( = 0.00385) IEC 751 –200 to 850 0.009 °C (0.0162 °F) Entire Sensor Input Rang




Pt 100 ( = 0.003916) JIS 1604 –200 to 645 0.009 °C (0.0162 °F) Entire Sensor Input Rang

Pt 200 ( = 0.003916) JIS 1604 –200 to 645 0.012 °C (0.0216 °F) Entire Sensor Input Rang

Ni 120 Edison Curve No. 7 –70 to 300 0.009 °C (0.0162 °F) Entire Sensor Input Rang

Cu 10 Edison Copper Winding No. 15 –50 to 250 0.06 °C (0.162 °F) Entire Sensor Input Rang

Pt 50 ( = 0.003910) GOST 6651-94 –200 to 550 0.018 °C (0.0324 °F) Entire Sensor Input Rang

Pt 100 ( = 0.003910) GOST 6651-94 –200 to 550 0.009 °C (0.0162 °F) Entire Sensor Input Rang

Cu 50 ( = 0.00426) GOST 6651-94 –50 to 200 0.012 °C (0.0216 °F) Entire Sensor Input Rang

Cu 50 ( = 0.00428) GOST 6651-94 –185 to 200 0.012 °C (0.0216 °F) Entire Sensor Input Rang

Cu 100 ( = 0.00426) GOST 6651-94 –50 to 200 0.009 °C (0.0162 °F) Entire Sensor Input RangCu 100 ( = 0.00428) GOST 6651-94 –185 to 200 0.009 °C (0.0162 °F) Entire Sensor Input Rang

Thermocouples

Type B NIST Monograph 175, IEC 584 100 to 1820 0.0435 °C T 1000 °C

0.096 °C - (0.0075% of (T - 300)) 300 °C T < 1000 °C

0.162 °C - (0.033% of (T - 100)) 100 °C T < 300 °C

Type E NIST Monograph 175, IEC 584 –50 to 1000 0.015 °C + (0.00129% of absolute value T) All

Type J NIST Monograph 175, IEC 584 –180 to 760 0.0162 °C + (0.00087% of T) T 0 °C

0.0162 °C + (0.0075% of absolute value T) T < 0 °C

Type K NIST Monograph 175, IEC 584 –180 to 1372 0.0183 °C + (0.0027% of T) T 0 °C


Type N NIST Monograph 175, IEC 584 –200 to 1300 0.0204 °C + (0.00108% of absolute value T) All

Type R NIST Monograph 175, IEC 584 0 to 1768 0.048 °C T 200 °C

0.069 °C - (0.0108% of T) T < 200 °CType S NIST Monograph 175, IEC 584 0 to 1768 0.048 °C T 200 °C

0.069 °C - (0.0108% of T) T < 200 °C

Type T NIST Monograph 175, IEC 584 –200 to 400 0.0192 °C T 0 °C


DIN Type L DIN 43710 –200 to 900 0.0162 °C + (0.00087% of T) T 0 °C


DIN Type U DIN 43710 –200 to 900 0.0192 °C T 0 °C


Type W5Re/W26Re ASTM E 988-96 0 to 2000 0.048 °C T 200 °C

0.069 °C - (0.0108% of T) T < 200 °C

GOST Type L GOST R 8.585-2001 –200 to 800 0.021 °C T 0 °C


Other Sensor Types

Millivolt Input –10 to 100 mV 0.0015 mV Entire Sensor Input Ran

2-, 3-, 4-wire Ohm 0 to 2000 0.0252 Entire Sensor Input Rang

(1) Change in ambient is with reference to the calibration temperature of the transmitter 68 °F (20 °C) from factory.

0.452

0.092

+ 0.459= °C




September 2010

A-5


DIMENSIONAL DRAWINGS

248 Wireless Remote Mount

248 Wireless Direct Mount

Dimensions are in inches (millimeters)

Remote mounted temperature sensor specifi ed separately

7.94(201,6)

4.46(113,2)

3.51(89,2)

5.71(145)

3.99(101,3)

90°

7.81(198,4)

6.05(153,7)

4.26(108,2)

Direct mounted temperature sensor

specified separately (see ordering

option code XA)

7.94

(201,6)

90°

7.81(198,4)

4.26(108,2)

6.05(153,7)

4.35(110,6)





A-6

ORDERING INFORMATION

Table A-3. Rosemount 248 Wireless Temperature Transmitter

★ The Standard offering represents the most common options. The starred options (★) should be selected for best delivery. __The Expanded offering is subject to additional delivery lead time.

Code Product Desc ript ion

248 Temperature Transmitter

Transmitt er Type

Standard Standard

D Wireless Field Mount ★

Transmitt er Output

Standard Standard

X Wireless ★

Product Certifications

Standard Standard

NA No Approval ★

I5 FM Intrinsically Safe ★

N5 FM Non-incendive and Dust Ignition-proof ★

I6 CSA Intrinsically Safe ★

I1 ATEX Intrinsic Safety ★

I7 IECEx Instrinsic Safety ★

Enclosure Options Material IP Rating

Standard Standard

D Wireless Housing Aluminum IP66 ★

Conduit Entry Size

Standard Standard

2 1/2-14 NPT ★

Wireless Update Rate, Operating Frequency and Protocol

Standard Standard

WA3 User Configurable Update Rate, 2.4GHz DSSS, WirelessHART★

Omnidirectional Wireless Antenna and SmartPower

Standard Standard

WK1 Long range, Integral Antenna, Power Module Adapter, Intrinsically Safe (Power Module separate) ★

Options (Include with selected model number)

Mounting Bracket

Standard Standard

B4 Universal Mounting Bracket for 2-in. pipe and panel mounting - SST bracket and bolts ★

B5 Universal “L” Mounting Bracket for 2-in. pipe mounting - SST bracket and bolts ★

Cable Gland

Standard Standard

G2 Cable Gland (7.5 mm - 11.9 mm) ★

G4 Thin Wire Cable Gland (3 mm - 8 mm) ★

5-Point CalibrationStandard Standard

C4 5-Point Calibration (Requires the Q4 option code to generate a Calibration Certificate) ★

Calibration Certificate

Standard Standard

Q4 Calibration Certificate (3-Point Calibration) ★

External Ground

Standard Standard

G1 External Ground Lug Assembly ★

Line Filter

Standard Standard

F5 50 Hz Line Voltage Filter ★

F6 60 Hz Line Voltage Filter ★




September 2010

A-7


Software Configu ration

Standard StandardC1 Custom Configuration of Date, Descriptor, Message and Wireless Parameters (Requires CDS with order) ★

Assemble to Options

Standard Standard

NS No Sensor ★

XA Sensor Specified Separately and Assembled to Transmitter ★

Typical Model Number : 248 D X NA D 2 WA3 WK1 B4 F6 NS

Table A-3. Rosemount 248 Wireless Temperature Transmitter

★ The Standard offering represents the most common options. The starred options (★) should be selected for best delivery.

__The Expanded offering is subject to additional delivery lead time.





A-8





www.rosemount.com

Appendix B Product Certifications

Approved Manufactur ing Locations . . . . . . . . . . . . . . . . . page B-1

Telecommunication Compliance . . . . . . . . . . . . . . . . . . . .page B-1

FCC and IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page B-1

European Union Directive Information . . . . . . . . . . . . . . . page B-1

Ordinary Location Certifi cation for FM . . . . . . . . . . . . . . . page B-1

Hazardous Locations Certif icates . . . . . . . . . . . . . . . . . . . page B-2

Approved ManufacturingLocations

Rosemount Inc. - Chanhassen, Minnesota, USA

Emerson Process Management GmbH & Co. - Karlstein, Germany

Emerson Process Management Asia Pacific Private Limited - Singapore

TelecommunicationCompliance

All wireless devices require certification to ensure that they adhere toregulations regarding the use of the RF spectrum. Nearly every countryrequires this type of product certification. Emerson is working withgovernmental agencies around the world to supply fully compliant productsand remove the risk of violating country directives or laws governing wirelessdevice usage.

FCC and IC This device complies with Part 15 of the FCC Rules. Operation is subject tothe following conditions: This device may not cause harmful interference. Thisdevice must accept any interference received, including interference that maycause undesired operation.

This device must be installed to ensure a minimum antenna separationdistance of 20 cm from all persons.

European UnionDirective Information

The current Declaration of Conformity is located at the end of this document.The most recent revision of the European Union Declaration of Conformitycan be found at www.emersonprocess.com.

ATEX Directive (94/9/EC)Emerson Process Management complies with the ATEX Directive.

Electro Magnetic Compatibility (EMC) (2004/108/EC)Emerson Process Management complies with EMC Directive.

Radio and Telecommunications Terminal Equipment Directive (R&TTE)(1999/5/EC)

Emerson Process Management complies with the R&TTE Directive.

Ordinary LocationCertif ication for FM

As standard, the transmitter has been examined and tested to determine thatthe design meets basic electrical, mechanical, and fire protection

requirements by FM, a nationally recognized testing laboratory (NRTL) as

accredited by the Federal Occupational Safety and Health Administration

(OSHA).





B-2

Hazardous LocationsCertificates

North American Certifications

Factory Mutual (FM) Approvals

I5 FM Intrinsically Safe and Non-incendive

Certificate Number: 3039717Intrinsically Safe for Class I/II/III, Division 1, Groups A, B, C, D, E, F, and G.

Zone Marking: Class I, Zone 0, AEx ia llC

Temperature Codes T4 (Tamb = -50 to 70° C)

T5 (Tamb = -50 to 40° C)

Non-incendive for Class I, Division 2, Groups A, B, C, and D.


T5 (Tamb = -50 to 40° C)

Dust Ignition-proof for Class II/III, Division 1, Groups E, F, and G.

Ambient temperature limits: -50 to 85° C

Enclosure: Type 4X/IP66/IP67

Intrinsically Safe and Non-incendive when installed in accordance withRosemount drawing 00249-1000.

For use with Rosemount Power Module P/N 753-9220-XXXX only.

Special Condit ions for Safe Use

To avoid electrostatic discharge build up, the enclosure or antenna must

not be rubbed or cleaned with solvents or a dry cloth.

The enclosure is made of an aluminum alloy, and given a protective

polyurethane paint finish; however, care should be taken to protect it from

impact or abrasion if located in a zone 0 environment.

N5 FM Non-incendive and Dust Ignition-proof Certificate Number: 3039717

Non-incendive for Class I, Division 2, Groups A, B, C, and D.

Zone Marking: Class I, Zone 0, AEx ia llC


T5 (Tamb = -50 to 40° C)

Dust Ignition-proof for Class II/III, Division 1, Groups E, F, and G.

Ambient temperature limits: -50 to 85° C



Special Condit ions for Safe UseTo avoid electrostatic discharge build up, the enclosure or antenna must



polyurethane paint finish; however, care should be taken to protect it from

impact or abrasion if located in a zone 0 environment.




September 2010

B-3


Canadian Standards Association (CSA)

I6 CSA Intrinsically Safe

Certificate Number: 1091070

Intrinsically Safe for Class I, Division 1, Groups A, B, C,

and D.Temp Code T3C


Intrinsically Safe when installed per Rosemount drawing 00249-1020.


European Certifications

I1 ATEX Intrinsic Safety

Certificate Number: Baseefa10ATEX0121X II 1G

Ex ia IIC Ga T4 (Tamb = -60 °C to 70 °C)

Ex ia IIC Ga T5 (Tamb = -60 °C to 40 °C)Enclosure: IP66/IP67

1180


Special Condi tions for Safe Use (X):




polyurethane paint finish; however, care should be taken to protect it

from impact or abrasion if located in a zone 0 environment.

Table B-1. Sensor Parameters

Sensor

Uo = 6.6 V

Io = 26.2 mA

Po = 42.6 mW

Co = 11 uF

Lo = 25 mH





B-4

IECEx Certifications

I7 IECEx Intrinsic Safety

Certificate Number: IECEx BAS 10.0059X

Ex ia IIC Ga T4 (Tamb = -60 °C to 50 °C)Ex ia IIC Ga T5 (Tamb = -60 °C to 75 °C)

Enclosure: IP66/IP67


Special Condi tions for Safe Use (X):




polyurethane paint finish; however, care should be taken to protect it

from impact or abrasion if located in a zone 0 environment.

Table B-2. Sensor Parameters

Sensor

Uo = 6.6 V

Io = 26.2 mA

Po = 42.6 mW

Co = 11 uF

Lo = 25 mH



Emerson Process Management

The Emerson logo is a trade mark and service mark of Emerson Electric Co.Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.PlantWeb is a registered trademark of one of the Emerson Process Management group of companies.HART is a registered trademark of the HART Communication Foundation.Lexan and Noryl are registered trademark of General Electric.

All other marks are the property of their respective owners.

© 2010 Rosemount Inc. All rights reserved.

Standard Terms and Conditions of Sale can be found at www.rosemount.com/terms_of_sale

Reference Manual00809-0100-4248, Rev A

September 2010

248 wireless aa

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