resistomat type 2318 - j and b

© 2000 bursterpräzisionsmeßtechnik gmbh & co kgAll rights reservedEdition 18.12.2000

Manufacturer:burster präzisionsmeßtechnik gmbh & co kgTalstrasse 1 - 5 PO Box 143276593 Gernsbach 76587 Gernsbach

Note:The following information may be amended without prior notice. No part of this document may be reproducedor processed using electronic systems without prior consent in writing.

burster provides no warranty of any kind with respect to this material, including the implied warranty ofmerchantable quality and fitness for purpose.burster is not liable under any circumstances for errors, incidental damage or consequential loss sustainedin connection with the function or use of this material.

RESISTOMAT®

Type 2318

Type 2318RESISTOMAT®

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Table of Contents

Pages

1. Delivery check ...............................................................................1-1

2. Maintenance and customer service ............................................2-1

3. General information ......................................................................3-13.1 Application ................................................................................................ 3-13.2 Description and Function .......................................................................... 3-1

4. Control elements and connections .............................................4-14.1 Front panel ......................................................................................4-14.2 Rear panel .......................................................................................4-2

5. Measurement .................................................................................5-15.1 Initial start-up ............................................................................................ 5-15.2 "Normal mode" measurement .................................................................. 5-15.3 "Normal mode with different functions" measurement .............................. 5-25.4 "Inductive" measurement .......................................................................... 5-45.5 "20 mV limit" measurement (dry-circuit measurement) ............................ 5-6

6. Interface and comparator .............................................................6-16.1 Standard setting ....................................................................................... 6-16.2 Pin assignment ......................................................................................... 6-26.3 Comparator ............................................................................................... 6-26.4 Communication ......................................................................................... 6-36.5 Instruction ................................................................................................. 6-46.6 Controls .................................................................................................... 6-56.7 Sample program ....................................................................................... 6-8

7. Appendix ........................................................................................7-17.1 Fault elimination ....................................................................................... 7-17.2 Explanation of the ANSI-protokcol ............................................................ 7-27.3 Explanations of the SCPI-commands ....................................................... 7-77.4 Technical Data ........................................................................................ 7-21


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1. Delivery check

The device weighs 5 kg and is contained in appropriately shock-resistant packaging.Unpack it carefully and check whether any contents are missing. The standard scope ofdelivery includes:

- a type 2318 resistance measuring device,- a mains cable,- a copy of this handbook,- a demo disc

Check the device carefully for damage. Should there be signs of damage has occurredduring transport, inform the shipping company within 72 hours. The packaging should bekept so that it can be examined by the manufacturer´s representative or the shippingcompany.

The RESISTOMAT® may only be transported in its original packaging or a comparablepackaging.


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2. Maintenance and customer service

Maintenance

From the user´s point of view, the RESISTOMAT® 2318 basically requires no maintenance.Any necessary repairs must always be performed by the manufacturer.

Customer service

Technical enquiries directed at the manufacturer should,wherever possible, be accompanied be the serial number ofthe unit in question. Only in this way is it possible to evaluateits technical configuration (including the software version)and thus provide prompt assistance.The serial number is located on the type plate.

Should it become necessary to send in the RESISTOMAT®

2318 for repairs, the following should be observed asregards packaging and forwarding:

Complaints concerning the unit should be described brieflyon a slip of paper which is to be attached to the housing ofthe unit

Stating the name of the contact person and department aswell as the telefax and telephone numbers for further enquirieswill accelerate the processing of complaints.

burster guarantees the reliable operation of the unit for aperiod of 12 months following delivery.

Repairwork will be performed free-of-charge during thisperiod.

Damage caused through improper operation of the unit isnot covered by the guarantee.

Technical specifications are subject to change at any timewithout prior notification.

Furthermore, we shall accept absolutely no responsibility forconsequential damage.

Manufacturer´s guarantee

Enquiries

Forwarding instructions


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3.2 Description and FunctionWith the RESISTOMAT® type 2318 you can measure resistances in the range1 µΩ to 199,99 kΩ. The device operates on the principle of current-voltage measurement infour wire technology.The current is constant and the voltage will be measured.

A general view of the measurement ranges you see in the following table.

The four-wire technology eliminates transition and lead resistances.

3.1 ApplicationThe Milliohmmeter RESISTOMAT® type 2318 allows rapid and precise measurements ofextremely small resistances. The robust desktop housing makes this device suitable forlaboratory operation as well as heavy-duty industrial use.

Applications for this device include the measurements of:

Metre samples of industrial cables Engine windings Transformer windings Transition resistances Contact resistances (relais, switches) Fuses Rivet connections

3. General information

Measuring range full scale Resolution Measuring current Measuring voltage

20 mΩ 1 µΩ 900 mA 18 mV

200 mΩ 10 µΩ 90 mA 18 mV

2 Ω 100 µΩ 9 mA 18 mV

20 Ω 1 mΩ 900 µA 18 mV

200 Ω 10 mΩ 900 µA 180 mV

2 kΩ 100 nΩ 900 µA 1,8 V

20 kΩ 1 Ω 9 µA 180 mV

200 kΩ 10 Ω 9 µA 1,8 V

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Possible on the RESISTOMAT® or the test device.

Allows quick operation.

The temperature of the test device can be registered with theexternal Pt-100 probe (e.g. burster type 2392-V001). The20° C value of the test device is indicated.The temperature coefficients of Cu, Ms 63 and Ms 80 areprogrammed as standard.A line interruption of the Pt-100 probe is recognized.

When the test device is connected, the thermal e.m.f at theinput sockets can be registered and suppressed.

The voltage at the current terminals is monitored and limitedto 20 mV.3 different measurement currents can be selected.

Can be connected directly without the requirement for ac-cessories. If a test device is known to have inductive compo-nents (e.g. transformer), this special operating mode can beselected.

1) Possible via a NO contact (e.g. foot switch).

2) Via logic levels at the 9-pole submin D-socket.

Individual wire breakages are also recognized.

RS232 or RS485.All functions can be controlled from the computer (except forthe switch for FE/PE non-isolation).

The compparator is exclusively computer-controlled.Relays and switching transistors are controlledsimultaneously.

Non-isolation:

Automatic measuringrange:

Temperaturecompensation:

Thermal e.m.f compensationand automatic zero point:

20 mV limit (dry circuitmeasurement):

Inductive test devices:

External triggering:

Interface and comparator:

Recognition of measuringline interruptions:


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4. Control elements and connections

4.1 Front panel

Indicate the selected operating mode

The measurement is commencedThe measured is stopped on a single push; the currentmeasured value is displayed.

When STOP is pushed again, the display is set to zero. Theoperating mode determined by the DIL switches on the rearpanel is also activated.

The next larger measuring range is selected.The next smaller measuring range is selected.

Current sourcePositive voltage inputNegative voltage inputCurrent sink (functional ground; protective ground asrequired)

Connect measuring cable shield to bare socket (protectiveground)

I- can be connected to protective ground with the slidingswitch on the rear panel (non-isolation on the RESISTOMAT®).Normally, this internal ground is used. Only for networks withextremely high interference and objects with single-sidedgrounding, e.g. motors, is it advisable to use an externalground. In such cases, the reference potential of the meas-uring circuit (-I) should be connected directly with the groundpoint of the test device, to avoid ground loops.

Light-emitting diodes:

Buttons: StartStop

Sockets: + I + U - U - I

Note:

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There is a borehole below the +I - socket. If desired, the zeropoint of the unit can be adjusted here (when cables are short-circuited, for example). For this, press the" Zero point" buttonon the rear panel of the unit. The LED on the "STOP" buttonwill then light up. Adjust the zero point in the desired meas-uring range and press "STOP" button again.

Automatic zero point adjustment can be configured by meansof the "Autozero" DIL switch on the rear panel but is notdisplayed on the front panel.

Here, zero point adjustment implies adjusting the zero pointof the input amplifier with the power source switched off.

The resistances of measuring leads are not measured in 4-wire measurement technology and cannot be compensatedon the 2318.

Note:

Front panel socket I- is connected to protective ground.(Non-isolation on the RESISTOMAT®)

Front panel socket I- is not connected to protective ground.(Non-isolation on the test device)

For setting different operating and measurement modes.

Different DIL switches are provided, depending on individualorders:

Monochrome switch : Up = ONDown = OFF

Multi-coloured switch: Up = OFFDown = ON

From left to right

4.2 Rear panel

Zero point adjustment

Left position:

Right position:

Mains switch with filter and fuse disconnector

8 DIL sliding switches:

Sliding switch "PE to I-":

Status I/0 RS232 / RS485

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PE an

Pt 100

Ext. START/ STOP

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Vor Öffnen des Gerätes Netzstecker ziehen !

Nullpunkt


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Toggles between the START and STOP states:

Press: STARTPress again: STOPPress again: STARTPress again: STOP etc.

NO (normally open) contact required, no switch.

Must be pressed before manual adjustment of the zeropoint.

If the grounding of the sensor is unclear,NEVER connect the cable shield to the plughousing; otherwise non-isolation might occuron the temperature sensor, and measurementerrors might be caused by double-groundcompensation currents.(The plug housing is protective ground)

For connecting the Pt-100 probe or simulator in 4-wiretechnology. 2-wire technology is possible if the appropriateterminals on the sensor are bridged.

Pt-100:

"Zero point" button:

Footswitch:

Note:

1 + U2 + I3 - I4 Functional ground5 Functional ground6 - U

Plug housing: Potential PECounterplug: burster Type 4291-0

View of socket

5

3 4

2

61

Designation Function

Cu/Al Temperature compensation for copper activeMs 63 Temperature compensation for Ms 63 activeMs 80 Temperature compensation for Ms 80 activeAutozero Automatic zero point adjustment100 mA Dry circuit measurement (20 mV-Limit)10 mA Dry circuit measurement (20 mV-Limit)Inductive Inductive test unitsAutomatic Automatic measuring range

The operating modes are activated with the STOP button. Corresponding LED's on the frontpanel light up. A running light sequence indicates that the selected operated mode isimpermissible.

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Control inputs and outputs

The 9-pole submin D socket is assigned as follows:

Pin Signal name Function

1, 2, 3 , 5 - occupied by interface (comparator)4 Limit Output: (0 = OK)6 GND Ref. potential: customer7 IN1 Input1: START(1=TRUE)8 IN2 Input2: STOP (1=TRUE)9 IN3 Input3: unused

Limit: The transistor is switched through if the I- line is interrupted or the limitis reached in the 20 mV-limit measurement mode.

Hardware of the inputs and outputs:

+ 5 V

Outputs:max. 30 Vmax. 100 mA

Inputs:

GND

Electrically isolated

The control elements and connections of the basic unit with the optional interface aretreated in Chapter 6.

⇒


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5. Measurement

5.1 Initial start-up

- All DIL switches on the rear panel should be in the "OFF" position.- Do not connect a test device at first.- Do not connect a Pt-100 probe at first.- Connect the unit to the mains with the accompanying cable. The cable must

only be plugged into sockets with a protective conductor terminal.- Switch on the unit.

- The LAMP test is carried out first: all available displays are switched on forabout 3 seconds (mΩ unit) and then switched off for about 1 s. The procedureis repeated with the kΩ unit.

- After that, the unit selects the largest measuring range and waits in theSTOP mode.

- Connect a test device, select the measurement mode as described inChapters 5.2...5.5 and press START.

5.2 "Normal mode" measurement

Typical test devices:

All DIL switches on therear panel:

Sliding switch position:

Measurement: START:

Cable samples (by the meter)ShuntsSmall (air) coilsWelded jointsRiveted joints

OFF

Refer to Chapter 1, in accordance with the grounding ofthe test device.

The measurement current is applied.

The measurement value is displayed.

Non-inductive test devices can be connected and discon-nected as required in the START mode.

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The measured value is held and displayed.The measurement current is turned off.

The display shows zero.

Measuring range selection is also possible during meas-urements.A measuring range overflow is indicated by flashing zeros.

With the test device connected, press the status button "Zeropoint" on the rear panel. The LED on the STOP key startsflashing. Adjust the zero point in the desired measuringrange with the potentiometer (opening next to the +I socket)and press the "STOP" button again.

Interruptions of individual measuring leads in the STARTmode are also recognized. The display flashes while theoptional interface responds as to an overload.

In the upper measuring ranges, the detection of interruptionsin the U leads can take a few seconds, whereas interruptionsin the I leads are recognized immediately in all measuringranges.

1 START:STOP

2 STOP:STOP

The selected functions (except for Autozero) are displayed by LED's on the front panel.

The various functions are selected by means of the DILswitches on the rear panel and activated by pressing theSTOP button twice.

The functions are selected by means of the DIL switches onthe rear panel and activated by turning on the unit.

Not accepted by the unit; the LED's display a running lightsequence.

Adjustment with the unitoperating:

Adjustment with the unit off:

5.3 "Normal mode with different functions" measurement

Manual zero pointadjustment:

Detection of lineinterruptions

Invalid combinations:


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Auto function: Automatic measuring range is active

- keys are blocked.

Setting: Automatic switch to ONDisplay: "Auto" LED lights up.

Temperature compensation is active. The 20°C value of thetest device is displayed.Setting: Cu/Al, Ms63 or

Ms 80 switch to ON

Display: LED "Pt 100"LED flashes on line interruption.Selection of the temperature coefficient:

Cu/Al switch: 3930 ppm/K(E-Cu)

Ms63 switch: 1500 ppm/K(Ms60/63/70)

Ms80 switch: 1600 ppm/K(Ms80/Tombak)

Thermal e.m.f compensation and automatic zero point cor-rection.

Activation: Set autozero switch to ONDisplay: None

In the STOP/STOP mode, the voltage present at the U-terminals is measured and suppressed, so that zeros aredisplayed. By pressing the START button, this voltage isstored and the measurement activated..

Only recommended in the START-STOP mode.

Continuous operation in the autozero mode is interrupted bythe unit after about 10 minutes, and the STOP mode isselected.

The Auto/Pt 100/Autozero functions can be combined asrequired. However, it is not advisable to use the Auto andAutozero functions at the same time if the full measurementaccuracy is to be achieved.

The interruption of individual measuring leads in the STARTmode is also recognized. The display flashes, while theoptional interface responds as to an overload.

In the upper measuring ranges, the detection of interruptionsin U-lines can take several seconds, whereas interruptionsin I-lines are detected immediately in all measuring ranges.If the automatic function is also active, interruptions in U-lines are only recognized conditionally or after a certainperiod of time.

PT-100 function:

Autozero function:

Note:

Combined functions:

Detection of lineinterruptions:

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5.4 "Inductive"measurement

InductancesMotor windingsTransformersWound cablesCable drums

The functions are selected by means of the DIL switches onthe rear panel and activated by pressing the STOP buttontwice.

The functions are selected by means of the DIL switches onthe rear panel and activated by turning on the unit..

Not accepted by the unit; the LED's display a running lightsequence.

Note that the unit itself does not recognize inductive test devices, but that the user is to selectthe "Inductive" operating mode.

Adjustment with the unit on:

Adjustment with the unitturned off:

The selected functions (except autozero) are displayed by LED's.


WARNING Special caution is required in the case of inductive test devices!

If - the plugs are pulled out of their sockets,- the measurement current is switched over,- the cables tear,- the terminals on the test device are loose,- the unit is switched off during measurement,- the power is interrupted during measurement- the measurement current changes for any other reason:

then extremely dangerous inductive voltages can be generated underthese physical conditions!

Invalid combinations:


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When does the DANGER LED come on?

Setting: Inductive DIL switch ON

In accordance with the grounding of the test device.See Chapter 4.1

"Inductive" LED comes on

Not permissible:Combination with the automatic functionCombination with the 20 mV limit measurement mode

Permissible:Combination with the Pt-100 functionCombination with the autozero function

Start measuring unknown test devices in the largest meas-uring range.

Measuring ranges can be selected only in the STOP state.A ramp function is activated for the current.The current control has different control parameters.

Slide switch position:

Display:

Notes:

Changes with respect tonormal operation:

All integrated protective functions are also active in the other measurement andoperating modes.

1. The unit must be on.

2. If value of the voltage between I+ and I- exceeds 10V. As a rule, this is only possibleif parts of the suppressor circuit are damaged. In this case, have your unit checkedimmediately.

Once again, it must be specially noted that the unit itself does not recognize inductivetest devices, but that the "Inductive" operating mode is to be selected by the user.

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The interruption of individual measuring lines in the STARTstate is also detected:The display flashes and the optional interface responds as toan overload.

The detection of interruptions in the U-lines can take severalseconds in the upper measuring ranges, while interruptionsin the I-lines are detected immediately in all measuringranges.

5.5 "20 mV limit" measurement (dry-circuit measurement)


Adjustment with the unitturned on:

Adjustment with the unitturned off:

The selected functions (except autozero) are displayed by LED's. Invalid combinations arenot accepted by the unit, and the LED's display a running light sequence.

Settings:

Slide switch position:

Display:

SwitchesContactsRelays

The functions are selected by means of the DIL switches onthe rear panel and activated by pressing the STOP buttontwice.

The functions are selected by means of the DIL switches onthe rear panel and activated by turning on the unit.

DIL switches Meas. current Meas. range

10 mA 9 mA 2 Ω

100 mA 90 mA 200 mΩ

10 +100 mA 900 mA 20 mΩ

In accordance with the grounding of the test device.See Chapter 4.1

"20 mV" LED comes on


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Not permissible:Combination with the automatic functionCombination with the "Inductive" measurement mode

Permissible:Combination with the Pt-100 functionCombination with the autozero function

The measurement range is determined by the measure-ment current:

The START/STOP mode is recommended.

The voltage across the I terminals is measured and limited to20 mV with the shunt.

The measurement voltage is 18 mV for the upper limit of themeasuring range. If the entire measuring range is to beutilized, ensure that the voltage drop across the leads is nomore than 2 mV, as the electronic voltage limiter is activatedat a voltage of 20 mV across the I sockets.

We recommend using only half of the measuringrange.

For the purpose of orientation, the 20 mV LED on the frontpanel starts flashing on attainment of the 20 mV limit. Themeasurement value displayed is then invalid (also see Chap-ter 4.2)

In 20 mΩ to 20 Ω ranges, it can basically be assumed that,even if the 20 mV limit is not activated, the voltage in themeasurement mode does not exceed 18 mV if the measuringrange is not exceeded. However, selection of the START/STOP mode is absolutely necessary here.

The interruption of individual measuring lines in the STARTmode is also detected:The display flashes and the optional interface responds as toan overload.

Notes

IMPORTANT NOTE:

Changes with respect tonormal operation:



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6. Interface and comparator

Details of the unit's configuration can be found in the appendix, Chapter 7.5.

All functions, except the switch for non-isolation, can be remote-controlled via the interface.The configuration selected via the interface has precedence over that selected by means ofthe DIL switches.

As soon as a command is issued through the interface, the unit assumes the REMOTE stateand the corresponding LED on the front panel comes on. Pressing any button resets the unitto the LOCAL state, whereby the present operating mode is retained. Pressing the STOPbutton twice activates the configuration selected on the unit itself.

If the measuring range is exceeded or a lead breaks, theRESISTOMAT® sends 9.9999e+11 as the measured value.

Note:

6.1 Standard settings

RS 232 (default)RS 485 full duplex (default, if RS 485 is selected)

8 Data bits These parameters cannot0 Parity bit be changed.1 Stop bit1 Start bit

1200, 2400, 4800, 9600, 19200 (9600=default)

Address range: 0-15Hardware addressing: 0-15 in the unit, (0=default)

Software addressing: Hardware address must be0.

Software address fromEEPROM(Default:1)

Interface:

Parameters:

Baud rate:

Address:

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6.2 Pin assignment


1. For RS 232:

RESISTOMAT® Computer Computer25-pole 9-pole

Pin Pin Pin2 TXD 3 RXD 2 RXD3 RXD 2 TXD 3 TXD

5 CTS 8 CTS4 RTS 7 RTS

20 DTR 4 DTR6 DSR 6 DSR

7 GND 7 GND 5 GND

2. For RS 485, full duplex:

RESISTOMAT®

Pin Signal Computer

7 GND GND12 +RXD TXD+15 +TXD RXD+19 - RXD TXD-24 - TXD RXD-

6.3 Comparator

The window comparator is set from the host computer using software exclusively. See theinstruction list, Chapter 6.5Evaluation takes place after every digitization, i.e. after approx. 200 ... 400 ms.

Measured value Statement

Value < lower limiting value too small

Lower limit <= value < =upper limit good

Value > upper limiting value too large


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The potential-free relay contacts are routed outside via a 9-pole terminal strip on the rear panelof the unit. Open-collector terminals on the 9-pole submin D plug are also available.


1 O1 NC-contact measured value too large

2 S1 NO-contact measured value too large

3 MK1 Central contact measured value too large

4 O2 NC-contact measured value good

5 S2 NO-contact measured value good

6 MK2 Central contact measured value good

7 O3 NC-contact measured value too small

8 S3 NO-contact measured value too small

9 MK3 Central contact measured value too small

Contact load capacity: 48 V, 1 A, 30 VA max



1 Out1 Comparator output: too large (0=true)

2 Out2 Comparator output: good (0=true)

3 Out3 Comparator output: too small (0=true)

5 - Unused

6 GND Reference potential, customer-side

Open-collector outputs (max. 30 V, 100 mA), see Chapter 4.2

6.4 Communication

ANSI protocol used: ANSI X3.28 2.5 A3/A4

Selection Supervisory Sequence: ggbbSR<ENQ>Fast Selection Sequence: ggbbSR<STX>command<ETX>Polling Supervisory Sequence: ggbbPO<ENQ>g: Group address (0...15) b: User address (0...15)Command end character: <LF>Transmission block end character: <LF>

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6.5 Instruction set

Measuring commands

Measuring range selection

Operating mode selection

Comparator functions

ABORtFETCh[:SCALar:RESistance:DC]?INITiate[:IMMediate]MEASure[:SCALar:RESistance:DC]?READ[:SCALar:RESistance:DC]?

SENSe:RESistance:RANGe:AUTOSENSe:RESistance:RANGe[:UPPER]

CALibration:ZERO[:AUTO]SENSe:CORRection:TCOMpensate:MEDiumSENSe:RESistance:LOADSOURce:VOLTage:LIMit[:AMPLitude]

CALCulate:LIMit:LOWerCALCulate:LIMit:UPPerCALCulate:LIMit:STATe

SYSTem:COMMunicate:SERial:ADDRess:GROupSYSTem:COMMunicate:SERial:ADDRess:USERSYSTem:ERRor?SYSTem:KLOCkTEST:DISPlay*IDN?*RST

STATus:PRESetSTATus:OPERation:CONDition?STATus:OPERation:ENABleSTATus:OPERation[:EVENt]?STATus:QUEStionable:CONDition?STATus:QUEStionable:ENABleSTATus:QUEStionable[:EVENt]?*ESE*ESR?*STB?*SRE

System functions

Status Register Functions


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Alterations to the factory configuration ca be performed, if necessary by inserting jumperson the digital board.

For this purpose, the unit must be opened :

1. Pull out the mains plug

2. Remove the front and rear frames:Using your thumbs, pull the narrow sides of the frame outwards and drawthe frame away from the unit.

3. Remove the 4 screws at the top and take off the cover.

4. Carry out the required modification.

5. Assemble the device in reverse sequence.

6.6 Controls

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Set with switch S1 (0=switch on, 1= switch off) Address D5 D4 D3 D2 D1

0 0 0 0 0 01 0 0 0 0 12 0 0 0 1 03 0 0 0 1 14 0 0 1 0 05 0 0 1 0 16 0 0 1 1 07 0 0 1 1 18 0 1 0 0 09 0 1 0 0 110 0 1 0 1 011 0 1 0 1 112 0 1 1 0 013 0 1 1 0 114 0 1 1 1 015 0 1 1 1 1

Software addressing 1 X X X X =arbitrary

Software: If the data bit D5=0,the address from data bits D0 to D4 isread in (value range 0 to 15). This setting is allocated to thegroup address as well as the user address.

The addresses set via the interface instruction apply here. The group and user addresses maydiffer, whereas they are identical in the case of the hardware settings.

The addresses are read in when the unit is switched on.

Set the baud rate: Jumper-field JP2 (0=Jumper inserted)

Jumper Baud rate

J3 J2 J1 [Baud]

0 1 0 192001 0 0 48001 0 1 24001 1 0 12000 0 0 9600 (Default)0 0 1 96000 1 1 96001 1 1 9600

Address setting:

Hardware


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Interface selection:

Jumper-field JP2: (0=Jumper inserted)

J7 = 0 -> RS485J7 = 1 -> RS232 (default)J8 = 0 -> full duplex (default, with RS 485)

Jumpers JU1...JU4:

With RS232 (default): Jumper JU1: 1-2 closed

2-3 open Jumper JU3: 1-2 closed

2-3 open Jumper JU4: 1-2 closed

2-3 open

With RS485: Jumper JU1: 1-2 open

2-3 closed Jumper JU3: 1-2 open

2-3 closed Jumper JU4: 1-2 open

2-3 closed

Full duplex: Jumper JU2: open

Additional settings on jumper field JP2: (0=jumper inserted)

J4 Not used.

J5 = 0 -> Character delay off (default)J5 = 1 -> Character delay on

J6 = 0 -> Block check off (default)J6 = 1 -> Block check on

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6.7 Sample program in BASICInterface setting for the Demo-program:Interface: RS232 Group adress: 0Baud rate: 9600 User adress: 0Data bits: 8 Character delay: offStopp bits: 1 Block check: off

REM****************************************************************REMREM Filename : DEMO2318.BAS Version: 1.0REMREM Entwickelt von : PV am 20.02.1993REM Geändert von : am xx.xx.xxxxREMREM Sprache : QBASIC Betriebssystem: MS-DOS 5.00REMREM Funktion : Sample program for the adjustment of theREM RESISTOMAT Type 2318 via RS232-InterfaceREMREM****************************************************************REMCLS " Clear ScreenPRINT „ DEMOPROGRAMM „PRINT „ burster „PRINT „ Steuerung über RS232 Schnittstelle“PRINTPRINT „Resistomat 2318 onf ‘STOP’,choose your measurement renge!“PRINTDIM ant$(50)REM special sign will definedSTX$ = CHR$(2)ETX$ = CHR$(3)EOT$ = CHR$(4)ENQ$ = CHR$(5)ACK$ = CHR$(6)NAK$ = CHR$(21)CR$ = CHR$(13)lf$ = CHR$(10)ESC$ = CHR$(27)com$ = „“openstr$ = „“PRINTINPUT „Welche Schnittstelle wollen Sie verwenden?INPUT (1->COM,2->COM2)“;aIF ((a <> 1) AND (a <> 2)) THEN PRINT „Ungültige Schnittstelle“: ENDIF (a = 1) THEN com$ = „COM1“IF (a = 2) THEN com$ = „COM2“openstr$ = com$ + „:9600,N,8,1“PRINT


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OPEN openstr$ FOR RANDOM AS #3 ‘ RS232 INITIALISIERENmesstart$ = EOT$ + „0000sr“ + STX$ + „INIT“ + lf$ + ETX$fetch$ = EOT$ + „0000SR“ + STX$ + „FETC?“ + lf$ + ETX$polling$ = EOT$ + „0000PO“ + ENQ$abort$ = EOT$ + „0000sr“ + STX$ + „ABOR“ + lf$ + ETX$

anzahl = 0INPUT „Anzahl der gewünschten Meßwerte: „; anzahl

PRINT #3, messtart$ant$ = „“ ‘clear the answer stringant$ = INPUT$(1, #3) ‘read the answerIF (ant$ <> ACK$) THEN ‘If not ACK thenPRINT „Gerät antwortet mit INIT NAK“ ‘display the error messageEND IF

i = 0WHILE i < anzahlPRINT #3, fetch$ant$ = „“ ‘clear the answer stringant$ = INPUT$(1, #3) ‘read the answerIF (ant$ <> ACK$) THEN ‘If not ACK thenPRINT „Gerät antwortet mit FETCH NAK“ ‘display the error messageEND IF

polling: PRINT #3, polling$ant$ = „“ ‘clear the answer stringstri$ = „“ ‘clear the measure value stringant$ = INPUT$(1, #3)WHILE (ant$ <> ETX$) AND (ant$ <> EOT$)‘solong no ETX or EOT recivedant$ = INPUT$(1, #3) ‘read sign from the RS232

IF ant$ >= CHR$(32) THEN ‘If no special signstri$ = stri$ + ant$ ‘from the measure value stringEND IFWEND

IF (ant$ = EOT$) THEN GOTO pollingi = i + 1PRINT i, stri$WEND

PRINT #3, abort$ant$ = „“ ‘clear the answer stringant$ = INPUT$(1, #3) ‘read the answerIF (ant$ <> ACK$) THEN ‘If not ACK thenPRINT „Gerät antwortet mit ABORT NAK“ ‘display the error messageEND IFEND


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7. Appendix7.1 Fault eliminationThe unit is completely maintenance-free and protected against most types of electricalinterference. However, this does not preclude the occurrence of faults which you as acustomer should be able to diagnose and eliminate.

Fault:

Causes:

Fault:

Causes:

Fault:

Causes:

********************The unit does not indicate any function after it has been turned on.

The mains cable is not properly connected. Insert it correctly.

The mains fuse is defective: the mains fuse is located in the mainsconnection module behind the small plate between the switches andthe connector for non-heating apparatus. Value: 1 A, slow-blowing.Disconnect the mains cable before replacing the fuse.

********************The unit indicates incorrect values in all measuring ranges.

The input protection diodes have been short-circuited by an overload:

Turn off the unit and disconnect the cable. Measure the resistancebetween the I+ and I- sockets with an ohmmeter. Reverse the polarity.If there is a short-circuit in both directions, the input protection diodesare defective.

Send the unit in for repair. ********************

The unit indicates an overload in all measuring ranges (flashingzeros).

1) Test-device resistance in excess of 200 kΩ:

Verify using another ohmmeter. If necessary, use a more suitablemeasuring device.

2) Defective fuse in the power source:

Open the unit as described in Chapter 6.6. A fuse is located on themain board at the front on the right. If it is defective, replace it with afast-blowing, 1.6 A fuse. Do not, on any account, use a more powerfulor slow fuse!Note: If this fuse is defective, you have probably made a big mistakewhile operating the unit!Check whether the input protection diodes between the I terminals stillwork:Measure the resistance between the I+ and I- terminals with theohmmeter. Reverse the polarity. If there is an open circuit in bothdirections, the input protection diodes are defective. Send the unit infor repairs.

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7.2 Explanation of the ANSI protocol

General description

The ANSI standard X3.28 Subc. 2.5 is applicable for systemsconsisting of several substations in a non-switched, multi-pointnetwork where all commands are sent from one control station. Onlyone transmitter (master) and one receiver (slave) are active on thebus at any time.

One of the stations is the control station. It assumes master statusand sends commands to a selected slave station, or transfers itsmaster status to a substation and assumes slave status in order toreceive data. A connection between two substations is not permissi-ble. The control station constantly monitors the link.

Connection set-up

Before connections are established, the control station has masterstatus and none of the substations have slave status. The controlstation can either(1) poll the substations in order to transfer its master status or(2) select a slave station to establish a connection.

Polling

The control station sends a polling supervisory sequence whichfetches data requested from the Res2318. The prefix selects indi-vidual stations. <ENQ> defines the end of the polling supervisorysequence.The polling supervisory sequence of the Res2318 has the followingformat:

<groupaddr><groupaddr><useraddr><useraddr>po<ENQ>

Example:Selected group address 10Selected user address 11

Polling supervisory sequence: aabbpo<ENQ>

A S C I IcharacterENQ

Prefix

Group address (hex)set in the interfacemenu

User address (hex) setin the interface menu

A S C I Icharacters"p"and "o"

Explanationof the

communicationprotocol for

connection set-up

Resistomat®

as master

2


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A substation which recognizes its polling supervisory sequenceresponds in one of two possible ways:

(1) If the station has to transmit data, it does so and the controlstation assumes slave status.

(2) If the station has no data to transmit, it sends <EOT> whichterminates its master status and returns it to the control station.

If the control station receives no response or an invalid one, itterminates the connection by sending <EOT>.

Selection with response

The control station sends a selection supervisory sequence whichinitialises the Res2318 as a slave so that it can subsequently receiveSCPI commands. The prefix selects an individual substation. <ENQ>defines the end of the selection supervisory sequence.

The selection supervisory sequence of the Res2318 has the followingformat:

<groupaddr><groupaddr><useraddr><useraddr>sr<ENQ>

Example:Selected group address: 5Selected user address: 6

Selection supervisory sequence: 5566sr<ENQ>

A substation which recognizes its selection supervisory sequenceassumes slave status and sends one of two possible responses:

(1) If the station is ready to receive data, it sends <ACK>. Onobtaining this response, the master station commences the datatransmission.

(2) If the station is not ready to receive data, it sends <NAK>,whereupon the master station tries to address the same stationagain.

If the master station receives no response or an invalid one, it can tryto address the same station again or terminate the transmission.

Resistomat®

as slave

A S C I IcharacterENQ

A S C I Icharacters"s" and "r"

User address (hex) setin the interface menu

Group address (hex)set in the interfacemenu

3

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Fast selection

Instead of selection with response, the master station can send aselection supervisory sequence without <ENQ>. This selects asubstation as the slave. The master station commences data trans-mission directly without waiting for a response from the substation.Example:

Selected group address: 5Selected user address: 6

Fast selection sequence: 5566sr<STX>SCPI command <ETX>

Termination

The master station sends <EOT> to indicate that its data transmissionis complete. <EOT> returns the master status to the control station.

After a connection has been established in accordance with the ANSIX3.28 Subcat. 2.5 protocol, the data is transmitted in accordance withSubcat. A3 or Subcat. A4 (like A3, but with additional block-checkcharacter).

Subcats. A3/A4 are used in systems where a master station transmitsdata to an individual slave station. Every time the master stationsends a message to the slave station, it waits for a response. Whenthe response indicates that the data has been accepted (ACK), themaster station can send another message or terminate the connec-tion. A negative response (NAK) by the slave station indicates to themaster station that the data has not been recognized.

Data transmission

Data transmission is commenced by the master station after estab-lishment of the connection (see Subcat. 2.5 ). The master stationstarts the transmission with <STX>. After that, the actual data is sent.The data block is terminated with <ETX>. During transmission inaccordance with Subcat. A4, the <ETX> character must be followedby the block check character (BCC).

ResponseAfter recognizing <ETX> or <BCC>, the slave station sends one oftwo possible responses:( 1 ) If the data has been accepted and the station is ready to receive

new data, it sends <ACK>, whereupon the master station caneither transmit the next batch of data or terminate datatransmission.

Connectiontermination

Explanation ofthe data

transmissionprotocol in acc.

with ANSIX3.28 Subcat

A3/A4

4


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( 2 ) If the data has not been accepted and the slave station is readyto receive new data, it sends <NAK>, whereupon the masterstation can send other data or terminate the connection.

If the master station receives no response or an invalid one, it cansend a reply request supervisory sequence consisting of <ENQ>, orterminate the connection.

The timers defined in the ANSI standard are used to indicate that acertain control character was not received within a specified timeperiod.

Timer A ( response timer )Timer A is used by the transmitting station to protect itself against noresponse or an invalid one.

Start: Timer A is started after the transmission of an endcharacter awaiting a response (e.g. after ENQ or ETX ).

Stop: Timer A is stopped after a valid response has beenreceived.

Time-out: When a time-out occurs, the Res2318 sends EOT , thusterminating the connection.

Timer A in the Res2318 is set to a time of 5 seconds.

Timer B ( receive timer )Timer B is used by the receiving station to protect itself against non-recognition of an end-of-text character (e.g. ETX ).

Start: Timer B is started on the reception of a start-of-text character (STX).

Restart: Timer B is restarted, as long as data is still being received,to allow the reception of data blocks of different lengths.

Stop: Timer B is stopped when a valid end character is re-ceived.

Time-out: When a time-out occurs, the received data is rejected andthe Res2318 waits for another transmission.

Timer B in the Res2318 is set to a time of 5 seconds.

Timer functionsin acc. withANSI X3.28

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1. The controller sends a selectionsupervisory sequence"0000sr<ENQ>

2. The Res2318 assumes slavestatus and sends<ACK>

3. The controller sends a commandbeginning with <STX> and endingwith <ETX> or <BCC>

<STX>:DISPP:CONT?0.5<LF><ETX>/<BCC>)

4. The Res2318 sends <ACK> onrecognizing the command andwrites the current setting of thedisplay contrast into the outputbuffer.

5. The controller terminates theconnection with <EOT>

6. To fetch the response of theRes2318, the controller sends thepolling supervisory sequence, sothat the Res2318 assumes masterstatus0000po<ENQ>

7. The Res2318 transfers the datainto its output buffer

<STX>0.5<CR><LF><ETX>(<BCC>)

8. The controller responds with<ACK>

9. The Res2318 sends<EOT>thus terminating the connection

The following diagram shows the connection set-up between asystem controller and the Res2318, whose group and user addressesare 0.

The system controller can consist of a PC with an RS232 interface. A sample program in GWbasic for controlling the Res2318 via the serial interface of a PC follows in the appendix.

Master Slave

Controller X

Controller Res2318

XController

Flowchart ofconnection set-up in acc. with

ANSI X3.28Sub2.5,A3/A4

Controller X

Res2318 Controller

6


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1. General information

2. Measuring commands

3. Meas. range selection

ABORtFETCh[:SCALar:RESistance:DC]?INITiate[:IMMediate]MEASure[:SCALar:RESistance:DC]?READ[:SCALar:RESistance:DC]?

SENSe:RESistance:RANGe:AUTOSENSe:RESistance:RANGe[:UPPER]

CALibration:ZERO[:AUTO]SENSe:CORRection:TCOMpensate:MEDiumSENSe:RESistance:LOADSOURce:VOLTage:LIMit[:AMPLitude]

CALCulate:LIMit:LOWerCALCulate:LIMit:UPPerCALCulate:LIMit:STATe

SYSTem:COMMunicate:SERial:ADDRess:GROupSYSTem:COMMunicate:SERial:ADDRess:USERSYSTem:ERRor?SYSTem:CLOCkTEST:DISPlay*IDN?*RST

General informationSTATus:PRESetOperation Status RegisterSTATus:OPERation:CONDition?STATus:OPERation:ENABleSTATus:OPERation[:EVENt]?Questionable Status RegisterSTATus:QUEStionable:CONDition?STATus:QUEStionable:ENABleSTATus:QUEStionable[:EVENt]?Standard Event Register*ESE*ESR?Status Byte*STB?*SRE

4. Op. mode selection

5. Comparator functions

6. System functions

7. Status Register Func.

7.3 Explanations of the SCPI commandsContents of this chapter

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1. General informationThe SCPI commands are shown in long and abbreviated form. The long form consists of theentire command, while the abbreviated form is shown in capitals. Command sections shownin rectangular parentheses need not be included.

The commands can be sent in lower or upper case, long or abbreviated form.

The query form of a command consists of the command followed directly by a question mark.

If a command is sent with a parameter although no parameters are expected, the commandwarning bit (bit 14) of the questionable status register is set. The parameter is then ignoredand no error message is issued.

On the occurrence of an error, the 2318 sends <NAK> instead of <ACK>. The cause of theerror can be requested with the command "SYSTem:ERRor?“ (described later). In addition,the corresponding error bits in the status registers are set (refer to the Chapter on statusregisters).

8

2318 Status Register 992 SCPI Syntx & StyleThe bits markes with * are used in the 2318

Available to designerAvailable to designer

Error/Event Queue or Available to designer

MAV

ROS

Standard Event Status Register

Operation CompleteRequest Control

Query ErrorDevice Dependent Error

Execution ErrorCommand Error

User RequestPower on

01234567

** * *

CalibratingSETTing

RANGingSWEepingMESuring

Waiting for TRIGer SummaryWaiting for ARM Summary

CORRectingAvailable to designerAvailable to designerAvailable to designerAvailable to designerAvailable to designer

INSTrument SummaryPROGram Running

NOT USED

*

OPERation Status

SYSTem:ERRor?*

.

.

.

Status Byte

01234567

***

*

* The use of Bit 15 is not allowed since some controllers may have difficulty reading a 16 bit unsigned integer. The value of this bit shall always be 0.

+

Summary of IEEE 488.2 Status Structure Registers

VOLTageCURRent

TIMEPOWer

TEMPeratureFREQuency

PHASeMODulationCALIbrationResistance

Available to designerAvailable to designerAvailable to designer

INSTrument SummaryCommand Warning

NOT USED*

*

QUEStionable Status

0123456789

101112131415

+

0123456789

101112131415

+


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2. Measuring commands

MEASure[:SCALar:RESistance:DC]?

DESCRIPTION: Stopping a measurement, starting it, and fetching ameasured value.

PARAMETERS: No parameters

REMARKS: - Only query form

RESPONSE: Measured value in Ω without unit.Example: 0.1000

If the comparator function is active, the correspondingevaluation symbol (<,=,>), separated by a comma, is alsotransmitted.Example: 0.1000,=

READ[:SCALar:RESistance:DC]?

This command corresponds to the MEASure command on the 2318.

FETCh[:SCALar:RESistance:DC]?

DESCRIPTION: Supplies the next valid value measured after recognition ofthe command. Between the instruction INITiate and FETChyou must keep a wait of approx. 500 ms.


REMARKS: - Only query form- If the next available measured value is invalid, an <NAK> is sent (overrange).

RESPONSE: Measured value in Ω without unit.Example: 0.1000

If the comparator function is active, the correspondingevaluation symbol (<,=,>), separated by a comma, is alsotransmitted.Example: 0.1000,=

INITiate[:IMMediate]

DESCRIPTION: Starts a measurement if the 2318 was in the stopped mode


REMARKS: - No query form

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DESCRIPTION: Stops a measurement after the next measured value.


REMARKS: - No query form

3. Measuring range selection

SENSe:RESistance:RANGe:AUTO

DESCRIPTION: Setting the automatic measuring range selection.

PARAMETERS: ON or 1: Automatic mode onOFF or 0: Automatic mode off

REMARKS: The automatic mode:- cannot be selected for inductive loads.- cannot be selected for 20 mV limiting.- is deactivated if an inductive load is selected.- is deactivated if 20 mV limiting is selected.- is deactivated if a range is set manually.

*RST value: ON

RESPONSE: With automatic mode on: 1With automatic mode off: 0

SENSe:RESistance:RANGe[:UPPer]

DESCRIPTION: Selection of a desired measuring range.

PARAMETERS: Desired measuring range

REMARKS: - The parameter must lie between 0 and 200 000 Ω- The parameter can be sent with the units UOHM - MAOHM.- If automatic measuring range selection is active, it is deactivated by the manual selection of a measuring range.- If an inductive load has been selected, the measuring range cannot be changed after commencement of a measurement.

*RST value: 200 000

RESPONSE: The 2318 supplies the currently selected range without aunit in response to the query form.Example: 0.2

SENSe:RESistance:RANGe:STORe

DESCRIPTION: With this instruction code the selected measuring range willstored in the EEPROM.

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4. Operating mode selection

CALibration:ZERO[:AUTO]

DESCRIPTION: Activation of the automatic zero offset and thermal e.m.f compensation.

PARAMETERS: ON or 1: Zero offset onOFF or 0: Zero offset off

REMARKS: *RST value: OFF

RESPONSE: Zero offset on:1Zero offset off:0

SENSe:CORRection:TCOMpensate:MEDium

DESCRIPTION: Activation of automatic temperature compensation

PARAMETERS: Parameter Temperature coefficient

CU/AL -> 3930ppm/KMS63 -> 1500ppm/KMS80 -> 1600ppm/KNONE -> No temperature compensation

REMARKS: *RST value: NONE

RESPONSE: In accordance with the selected temperature coefficient:CU/AL or MS63 or MS80 or NONE

SENSe:RESistance:LOAD

DESCRIPTION: Selection of the type of test device to be measured.

PARAMETERS: COMPlex -> Inductive test deviceREAL -> Ohmic test device

REMARKS: Inductive load:- deactivates automatic mode- deactivates 20mV limiting- the measuring range can be changed only in the STOP mode.

RESPONSE: COMP -> with inductive load selectedREAL -> with inductive load deselected

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SOURce:VOLTage:LIMit[:AMPLitude]

DESCRIPTION: Selection of 20 mV limiting.

PARAMETERS: 20MV,10MA -> 2 Ω range20MV,100MA -> 200 mΩ range20MV,1A -> 20 mΩ rangeNONE -> Deselection of 20 mV limiting

REMARKS: 20 mV limiting:- cannot be selected for inductive loads.- deactivates the automatic mode.- is deactivated on selection of an inductive load.

*RST value: NONE

RESPONSE: The 2318 sends the currently selected 20 mV limiting type in response to the query form.

Example:20MV,10MA20MV,100MA20MV,1ANONE

5. Comparator functions

CALCulate:LIMit:LOWer[:DATA]

DESCRIPTION: Selection of the lower comparator limit.

PARAMETERS: Desired lower comparator limit

REMARKS: - The parameter must lie between 0 and 200 000 Ω.- The parameter can be sent with the units UOHM - MAOHM.- The value is stored in the EEPROM and retained when the unit is switched off.

RESPONSE: Selected comparator limit in Ω with no unitExample: 150

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CALCulate:LIMit:UPPer[:DATA]

DESCRIPTION: Selection of the upper comparator limit.

PARAMETERS: Desired upper comparator value

REMARKS: - The parameter must lie between 0 and 200 000 Ω.- The parameter can be sent with the units UOHM - MAOHM.- The value is stored in the EEPROM and retained when the unit is turned off.

RESPONSE: The selected comparator limit in Ω with no unitExample: 200

CALCulate:LIMit:STATe

DESCRIPTION: Activation of the comparator.

PARAMETERS: ON or 1 -> Comparator onOFF or 0 -> Comparator off

REMARKS: - The selected state is stored in the EEPROM and recalled when the unit is turned on again.- If the comparator is active, an evaluation symbol (<,=,>) separated by a comma is suffixed to every transmitted measurement value.

*RST value: OFF(The value stored in the EEPROM is retained.)

RESPONSE: With comparator on -> 1With comparator off -> 0

6. System functions

SYSTem:COMMunicate:SERial:ADDRess:GROup

DESCRIPTION: Selection of the group address of the serial interface

PARAMETERS: 0...15

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REMARKS: - The selected group address is stored in the EEPROM. It is activated if bit D5 of switch S1 is high when the unit is turned on.- If bit D5 of switch S1 is low when the unit is turned on, the

address from the hardware address switch is read in.

RESPONSE: The unit always responds with the address stored in theEEPROM.

SYSTem:COMMunicate:SERial:ADDRess:USER

DESCRIPTION: Selection of the user address of the serial interface

PARAMETERS: 0...15

REMARKS: - The selected user address is stored in the EEPROM. It is activated if bit D5 of switch S1 is high when the unit is turned on.- If bit D5 of switch S1 is low when the unit is turned on, the

address from the hardware address switch is read in.

RESPONSE: The unit always responds with the address stored in theEEPROM.

SYSTem:ERRor?

DESCRIPTION: Enquiry about a system error.


REMARKS: - Only query form- If the response to a command is <NAK>, the cause of the error can be requested.- In addition to the error description, the corresponding errorbits are set in the status registers. - Errors -100 - -199 set the command error bit in thestandard event register.- Errors -200 - -299 set the execution error bit in thestandard event register.- Errors -300 - -399 set the device dependent error bit in thestandard event register. - Errors -400 - -499 set the query error bit in the standardevent register.

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RESPONSE: 0,“ NO ERROR“-> No error

1010,“RESISTANCE OVER“-> Overrange; in addition, bit 9 in the questionable

status register is set.

-100,“COMMAND ERROR“-> Invalid command, incorrect command level.

-101,“INVALID CHARACTER“-> The query form was sent although the command has

no query form.

-109,“MISSING PARAMETER“-> A command awaiting a parameter was sent without

one.

-110,“COMMAND HEADER ERROR“-> Command header error

-120,“NUMERIC DATA ERROR“-> Parameter error

-200,“EXECUTION ERROR“-> The command could not be executed for some

reason.

-213,“INIT IGNORED“-> A command to start measuring was sent, although

the 2318 was in the START mode.

-221,“SETTINGS ERROR“-> A command was not executed because the

transmitted setting was not permissible in the currentoperating mode of the 2318.

-222,“DATA OUT OF RANGE“-> The parameter is outside the permissible range.

-350,“QUEUE OVERFLOW“-> More than one error has occurred. The most recent

error is always stored in the error buffer. Earlier errormessages are written over. The corresponding bitsin the event registers remain set.

-400,“QUERY ERROR“-> The transmission buffer has overflowed and data

has been rejected.

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TEST:DISPlay

DESCRIPTION: Carries out a segment test of the 7-segment display.


REMARKS: No query form

SYSTem:CLOCk

DESCRIPTION: Disables the keypad in the remote operating mode

PARAMETERS: ON or 1: Keypad disabledOFF or 0: Keypad enabled

REMARKS: If the keypad was disabled, control from the front panel is onlypossible if the keypad is enabled again via the interface or if the2318 is switched off and on again.

*RST value: OFF

RESPONSE: With keypad enabled: 0With keypad disabled:1

*IDN?

DESCRIPTION: The identification string of the 2318 is read out.


REMARKS: Only query form

RESPONSE: BURSTER,RESISTOMAT2318,xxxxxx,0

xxxxxx -> 6-digit serial number of the 2318*RST

DESCRIPTION: The unit is reset to a defined state


REMARKS: - No query form-AUTOMATIC mode on-IND off-20 mV limiting off-Autozero off-Temperature compensation off-Local Lockout (keyboard lock) off-Comparator off-Interface is not affected

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7. Status Register Functions

General information:

The status register functions control the status structures defined by SCPI and IEEE488. TheSCPI status registers consist of one condition, one event and one enable register. TheIEEE488 registers consist of one event and one enable register.

The status byte indicates whether a bit has been set in an event register, provided that the bitis enabled in the enable register.

Condition register:The condition register indicates the current condition of the unit.

Event register:The event register indicates whether the status of a bit in the condition register has changedfrom 0 (inactive) to 1 (active). The bit remains set until the event register is read out. It alsoremains set when the corresponding condition register bit is reset.

Enable register:The enable register is used to mask out the event register. If a bit in the event register is setand the corresponding bit in the enable register is enabled, the event register bit in the statusbyte is set.

Questionable status register:LSB MSBX|X|X|X|X|X|X|X|X|9|X|X|X|X|14|X

Bit 9: Resistance Error (Overrange)Bit 14: Command Warning (command parameter was ignored)

STATus:QUEStionable[:EVENt]?

DESCRIPTION: Read-out of the questionable event register


REMARKS: - Only query form- The register is reset through read-out.

RESPONSE: 0..32767

STATus:QUEStionaTble:CONDition?

DESCRIPTION: Read-out of the questionable condition register


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RESPONSE: 0..32767

STATus:QUEStionable:ENABle

DESCRIPTION: Setting and read-out of the questionable event enableregister

PARAMETERS: 0..32767, depending on the desired enable mask

REMARKS: The enable register enables the bits whose activationcauses bit 3 in the status byte to be set.

RESPONSE: 0..32767

Operation status register:LSB MSB X|X|X|X|4|X|X|X|X|X|X|X|X|X|X|X

Bit 4: Measuring (measurement in progress)

STATus:OPERation[:EVENt]?

DESCRIPTION: Read-out of the operation event register


REMARKS: - Only query form- The register is reset after read-out.

RESPONSE: 0..32767

STATus:OPERation:CONDition?

DESCRIPTION: Read-out of the operation condition register



RESPONSE: 0..32767

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STATus:OPERation:ENABle

DESCRIPTION: Setting and read-out of the operation event enable register

PARAMETERS: 0..32767, depending on the desired enable mask


RESPONSE: 0..32767

STATus:PRESet

DESCRIPTION: Resetting of the SCPI enable register


REMARKS: - No query form- No event registers are reset- Event registers are reset by the*CLS command- *SRE 0 resets the service request enable register.- *ESE 0 resets the standard event enable register.

*CLS

DESCRIPTION: Resetting of the event register


REMARKS: No query form

Standard event statusregister:LSB MSB X | X | Query Err | Dev.Dep.Err | Exec.Err | Comm.Err | X | X

*ESR?

DESCRIPTION: Read-out of the standard event register

PARAMETERS: None

REMARKS: - Only query form- Read-out resets the register

RESPONSE: 0..255, depending on the bits set

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*ESE

DESCRIPTION: Setting and read-out of the standard event enableregister.

PARAMETERS: 0 ... 255, depending on the desired enable mask.


Status Register:LSB MSB X | X | X | Quest.Stat | MAV | Event Stat | RQS | Oper.Stat

*STB?

DESCRIPTION: Read-out of the bytes

PARAMETERS: None

REMARKS: - Only query form- Read-out resets the register

RESPONSE: 0..255, depending on the bits set.

*SRE?

DESCRIPTION: Carries no significance for control via RS232/485.


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21

7.4 Technical data

Accuracy:

Measuring method:

Measuring sequence:

Display:

Range selection:

Zero balance:

Measuring connection:

Relay output:

Compliance voltage:

Dry circuit measurement:

Temperature compensation:

≤ ± 0,05 % of each full scale range

constant current with ration A/D converter

5 readings/s for ohmic probes

4 1/2-digit 7-segment LED, 15 mm high, with automaticpolarity and overload indication check after switch-on, 2 digit16 segment LED for unit display.

Manually via keys on the front panel, autpmatically viabuilt-in autorange-function or via RS232 interface.

manually or automatically

4-wire technolgy for current and voltage measuring (Kelvin).Potential-free circuit design, potential binding either at thebest object or at the RESISTOMAT®.

for the preselected upper and lower limiting values"to smal", "correct" or "to large".contact load 30 Wvoltage load approx. 48 Vcurrent load approx. 1 A

approx. 5 V

DIN 41640, part 4 and IEC 132-1

TKCu

= 3,93 ‰/KTK

MS 63= 1,50 ‰/K - with Pt 100-sensor via 6 pin

TKMS 80

= 1,60 ‰/K - LEMO-bush EGG.1B.306

Measuring range Resolution Measuring current

20.000 mΩ 1 µΩ 900 mA

200.00 mΩ 10 µΩ 90 mA

2.0000 Ω 100 µΩ 9 mA

20.000 Ω 1 mΩ 900 µA

200.00 Ω 10 mΩ 900 µA

2.0000 kΩ 100 mΩ 900 µA

20.000 kΩ 1 Ω 9 µA

200.00 kΩ 10 Ω 9 µA

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22

0 °C ... 23 ... 50 °C,approx. 90 % rel. humidity,non condensing

50 ppm/K

25-pin submin. D-bushBaud rate 1200 - 19200protocoll ANSI x 3.28 subcategory 2.5, A3/A4

- 20 °C ... + 60 °C

230 V + 6 % - 10 % 45 ... 65 Hz, approx. 30 VA

according VDE 0411, and addition VDE 0871/B

table housing

255 x 90 x 263 [mm]

3,5 kg

RESISTOMAT® Typ 2318-V001with RS232/485 interface

Temperature sensor type 2392-V 001with 2,5 m connection leads andplug for detailed informationplease refer to data sheet 42 Pt 100

Kelvin-measuring pliers andprobes for detailed informationplease refer to data sheet 2385

Wire holding devices fordetailed informationplease refer to data sheet 2381

Calibration resistances fordetailed informationplease refer to data sheet 1240

Ambient temperaturerange:

Temperature drift:

RS232-interface:

Storage temperature:

Power requirements:

Safety:

Housing:

Dimensions(width by height by depth):

Weight:

Accessories:

resistomat type 2318 - j and b

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