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Transmitter Calibrationwith the Fluke 750 Series

Documenting Process Calibrator

TEST DC PWR

++

Fluke DPC

Rosemount 444

Application Note

1. Connect a type K mini-connector into the TC inputo the DPC and connect tothe thermocouple input othe transmitter (Figure 1). Itis necessary that you use thecorrect type o mini-connec-

tor or this connection to theDPC.2. Connect the center two ter-

minals o the DPC to the con-nections on the transmitterwhere loop power is applied(Figure 1).

Note: I you preer to use houseloop power rather than supplyingloop power rom the DPC, connectthese two leads in series with theloop supply to the transmitter.

3. Once your connections aremade, starting rom the DPCpower up state (or measurescreen), select the mA but-ton to measure milliamps(Figure 2).

Figure 1.

Calibrating a 2 Wire ThermocoupleTransmitter with the Fluke 750 SeriesDocumenting Process Calibrators

The transmitter in this example is a 2 wire trans-mitter (needs loop power). The input stimulus orthis device is rom a type K thermocouple with aninput range o 100 C to 300 C at 0 % and 100 %.The output drawn against loop power is 4-20 mAat 0 % and 100 % with a tolerance o 0.25 %. Thesteps below show how to: 1) perorm a three point

ascending (3) As Found (pre-adjustment) test at0-50-100 %, and Tag the results, 2) adjust thezero and span (span = 100 %) o the transmitter,then 3) perorm a three point ascending As Let(post-adjustment) test at 0-50-100 %, Tag thoseresults and review them in memory.

The precision sourcing and measurementcapabilities o the rugged Fluke DocumentingProcess Calibrator (DPC) make it an ideal choiceor the calibration o process instrumentation.The ollowing examples show how to address trans-mitter calibrations quickly and eectively using theFluke 753 or 754 Documenting Process Calibrators.

Figure 2.

4. Next depress the MEAS/SOURCE button; now you arein the source screen.Since you want to source a

thermocouple, press TC/RTDonce. Press ENTER to selectTC. Use the down arrow tomove the cursor to K andthen press ENTER. SelectLinear T and press ENTER.The DPC will respond with????? asking or a tempera-ture to source. Depress 100and ENTER (Figure 3).

Figure 3.

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2 Fluke Corporation 750 Series Documenting Process Calibrators

5. Next press the MEAS/SOURCE button once andyou will be in the split screenmode (Figure 4).

Figure 4.

Note: Skip to step 7 i you aremeasuring current in series usingthe house loop power sourcementioned in step (2).

6. Next, depress the SETUPbutton on the DPC. The cursorshould begin on loop power.Depress ENTER, downarrow until the DPC cursoris on Enabled and depressENTER. Next depress theDone sotkey (Figure 5).

Figure 5.

7. At this point depressAs Found and selectInstrument and pressENTER, then ill in thetemplate, use the deaultDelay=0 seconds.)

Figure 6.

Depress DONE.You shouldnow see the split screen andare presented with sot keychoices o Abort, AutoTest, and Manual Test(Figure 7).

Figure 7.

8. Select Auto Test, and watchthe DPC take 0 %, 50 % and100 % measurements o cur-rent (4, 12 and 20 mA nomi-nal) while sourcing 100 C,200 C and 300 C.

9. Once the DPC has completedthis evaluation, it will displaythe post test summary screen

with the SOURCE, MEASUREand ERROR columns. Failuresin the error column will bein reverse video (Figure 8).Depress Done.

Figure 8.

10. Now you are presented withthe Tag entry screen (Figure 9).

Figure 9.

Press the ENTER key to editthe entries. Depress Donewhen complete until the splitscreen reappears with thesot key options o As Let,Adjust, Save and MoreChoices on the display o theDPC.

11. At this point, select Adjustand the DPC will source 0 %and measure or 4 mA to

0.25 %. As long as the errorexceeds .25 % the error win-dow in the measure hal othe screen will be in reversevideo. Adjust the zero on thetransmitter until the error isless than 0.25 %. Next, selectGo to 100 % and adjust thetransmitter span in the sameway. You may also Go to50 % to check linearity atmid-span.

12. Ater adjustment is complete,select As Let, Done andAutotest. Watch the 0-50-100 % evaluations. I theadjustment was successul,all the errors in the post runsummary should be in normal

video (or less than .25 %)(Figure 10).

Figure 10.

13. Select Done, Done, andDone again and you are

done!To review your resultsin memory, select the MoreChoices sot key, the ReviewMemory sot key and move yourcursor to the applicable result andpress enter. Select As Foundor As Let, then ENTER andreview the setup or the test,select Next Page or the results,and press Tag or its associatedlabel. Select Done and Done.Move your cursor to the applicableAs Let result and press ENTER

and review the test setup, selectNext Page or the results, andpress Tag or its associatedlabel. When you are inishedreviewing results, press Doneuntil right-most sot key labelchanges to More Choices.

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Fluke Corporation 750 Series Documenting Process Calibrators 3

1. Make the RTD sourceconnections, S1, S2, S3 andS4 (omit S3 and S4 or 2 wireRTDs and S4 or 3 wire RTDs;

S4 is only needed or 4 wireRTD sourcing).

2. Next, connect the loop powerand current measurementconnections, C1 and C2.

3. Once the connections aremade as per the diagram inFigure 11, enable the loop24 volt power rom the setup

screen, source the pertinentRTD or the speciic transmit-ter being evaluated, and setthe measure mode to mA.

Figure 11.

3 and 4 Wire RTD Sourcing for the Fluke 750 SeriesDocumenting Process CalibratorsOne o the most requently asked application questions pertaining to

the 750 Series Documenting Process Calibrators is, How do I hookup the test leads to the DPC to source 3 and 4 wire RTDs? For 3 and4 wire RTD measurement, the DPC has embedded hookup diagramsthat easily show you how to connect the DPC. However, or 3 and 4wire RTD source, the DPC does not oer that assistance.

The example shown below (Figure 11) depicts the hookup or a 3and 4 wire Rosemount 444 RTD Transmitter. You will need an addi-tional pair o TL22 test leads and AC20 industrial test clips to completeall the connections necessary or this application. In order to doublethe available connections to the source terminals on the DPC, you alsowill need to utilize the short black jumpers supplied with the Docu-menting Process Calibrator.

TEST DC PWR

++

Fluke DPC

C-2

C-1

S-3

S-2

S-4

S-1

4. At this point, enter the splitscreen mode o the DPC andperorm the As Found, Adjustand As Let tests as you did

in the previous thermocoupletransmitter example.

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1. Connect the pressure moduleto the DPC. Connect the out-put o the I to P to the inputo the pressure module. I youare using a dierential pres-sure module, make sure (orthis example) that it is a 15PSI module and connect tothe input labeled H(Figure 12).

2. Connect rom the center twobanana type connections othe DPC to the input o the Ito P where control current is

supplied (Figure 12).3. Once your connections are

made, assuming you are inthe power up state (or mea-sure screen), select the Pres-sure button (directly abovethe Range button) (Figure13).

4. Next depress the MEAS/SOURCE button; now you arein the source screen(Figure 14).

Figure 14.

4 Fluke Corporation 750 Series Documenting Process Calibrators

754 DOCUMENTINGPROCESS CALIBRATOR

Pressure Button

Figure 13.

+

754DOCUMENTINGPROCESS CALIBRATOR

Pressure

Module

Figure 12.

Calibration of an I to P (Current toPressure) with the Fluke 750 SeriesDocumenting Process Calibrators

A common device in the Fluke DPC workloadis the I to P. The I to P device is used to con-vert electrical loop analog control o 4-20 mAto pneumatic analog loop control o 3-15 PSI.

The device in this example is an I to P withcurrent input values o 4-20 mA or 0 % and100 % with output range o 3-15 PSI or 0 %and 100 %, +/- 2 %. This step-by-step exam-ple describes how to: 1) perorm a three pointascending (3) As Found (pre-adjustment) testat 0-50-100 %, Tag the results, 2) Adjust thezero and span (span = 100 %) o the I to P,then 3) perorm a three point ascending AsLet (post-adjustment) test at 0-50-100 %, Tagthose results and review them in memory.

Since you want to source acurrent, depress mA. DepressENTER which chooses SourcemA when given the choice oSource mA or Simulate Trans-mitter. When the DPC respondswith ????? asking or a current tosource, depress 4 and ENTER.

5. Next depress the MEAS/

SOURCE button once and youshould be in the split screenmode (Figure 15).

Figure 15.

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6. At this point depress AsFound, select Instrumentand press ENTER, then illin the template as shown inigure 16.

Figure 16.

Press DONE.You shouldnow see the split screen,with sot key choices oAbort, Auto Test andManual Test.

7. Select Manual Test, andwatch the DPC start at 0 %.Once the reading has settled,depress accept point. Per-orm the 50 % and 100 %measurements the same way.

8. Once the 753/754 has com-pleted this evaluation, itwill display the post testsummary screen with theSOURCE, MEASURE andERROR columns. Failuresappear in reverse video inthe Error column (Figure 17).Depress Done.

Figure 17.

9. Now you see the Tag entryscreen (Figure 18).

Figure 18.

Press the ENTER key to editthe entries. Depress Donewhen complete until the splitscreen reappears with thesot key options o: As Let,Adjust, Save, and MoreChoices.

10. At this point, select Adjustand the DPC will source 0 %(4 mA) and measure or 3 PSIto 2 %. As long as the errorexceeds 2 % the Error win-dow in the measure hal othe screen will be in reversevideo. Adjust the zero on theI to P until the error is lessthan 2 %. Next select Go to100 % and adjust span inthe same way. Select Go to50 % and evaluate linearity.

11. Ater adjustments are com-plete, select As Let, Doneand Manual Test and repeatstep (8). I the adjustmentwas successul, all the errorsin the post run summaryshould be in normal video(Figure 19).

Figure 19.

12. Select Done, Done, andDone again and you aredone!

Fluke Corporation 750 Series Documenting Process Calibrators 5

To review your results in

memory, select the More

Choices soft key, then the

Review Memory soft key.

Move your cursor to the

applicable result and press

ENTER. Select As Found

or As Left, then ENTER.

Press Next Page for the

results, and press Tag for its

associated label. Select Done

and Done and move your

cursor to the applicable As

Left result and press enter.

Review the setup for the test,

select Next Page for theresults, and press Tag for

its associated label. When you

are finished reviewing results,

press Done until right-most

soft key label changes to

More Choices.

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1. Connect the pressure moduleto the DPC. Connect the inputo the P to I and the outputo a pressure hand pumpto the input o the pressuremodule using a T connector(Figure 20). I you are using adierential pressure module,ensure (or this example) it isa 15 PSI module and connectto input labeled H.

2. Connect rom the center 2banana type connections othe DPC to the input o the Pto I where loop poweris supplied (Figure 20).

3. Next, depress the SETUP but-ton on the DPC. The cursorshould begin on loop power.Depress ENTER, downarrow to Enabled and depressENTER. Next depress theDone sotkey.

4. Once your connections are

made, assuming you arein the power up state (ormeasure screen), select themA button.

5. Next depress the MEAS/SOURCE button; now you arein the source screen (Figure21).

Figure 21.

6. Since we wish to sourcea pressure (using a handpump) depress the pressurebutton, (directly above theHART or range button)(Figure 22).

6 Fluke Corporation 750 Series Documenting Process Calibrators

7. Next depress the MEAS/SOURCE button once andyou should be in the splitscreen mode (Figure 23).

Figure 23.

+

754DOCUMENTINGPROCESS CALIBRATOR

Hand Pump

Pressure

Module

Figure 20.

754 DOCUMENTINGPROCESS CALIBRATOR

Pressure Button

Figure 22.

Calibration of a Pressure Transmitter(Pressure to Current or P to I) withthe Fluke 750 Series DocumentingProcess Calibrators

A common device in the Fluke DPC work-load is the pressure transmitter or P to Idevice. The P to I device is used to convertpneumatic analog loop control signals o3-15 PSI or other measured pressures toelectrical loop analog control signals o

4-20 mA. The device in this example is aP to I with pressure input values o 3-15PSI or 0 % and 100 % with output range(drawn rom loop power) o4-20 mA or 0 % and 100 %, +/- 2 %.In this step-by-step example we will:1) perorm a three point ascending (3)As Found (pre-adjustment) test at 0-50-100 %, and Tag the results, 2) adjust thezero and span (100 %) o the P to I, then3) perorm a three point ascending As Let(post-adjustment) test at 0-50-100 %, tagthose results and review them in memory.

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7/8Fluke Corporation 750 Series Documenting Process Calibrators 7

8. At this point depress AsFound, select Instrumentand press ENTER, then illin the template per Figure 24.

Figure 24.

Depress DONE.You shouldnow see the split screen andare presented with sot keychoices o Abort, Auto

Test, and Manual Test.

9. Select Manual Test, andwatch the DPC or theprompt: Go to 3 PSI(Figure 25).

Figure 25.

At that point using the handpump, pump until the DPCdisplay is reasonably closeto 3 PSI and depress AcceptPoint. Now the DPC shoulddisplay Go to 9 PSI. Again,using the hand pump, pumpup reasonably close to 9 PSIand depress Accept Point.When the DPC responds withGo to 15 PSI pump to that

value and Accept Point.It is important to understanda key eature o the DPC atthis point. When the erroris being calculated on themeasured mA by the DPC,it will make the calculationbased on the deviation othe amount o pressure beingsourced. What this means is,

i you are sourcing 3.120 PSI(1% o span above nominal),the DPC will look or a mAreading o 4.160 mA (also 1%o span above nominal). Inorder to make a proper evalu-ation o the device you needonly to get reasonably closeto the nominal pressure val-ues with the hand pump. Theremaining source pressureerror is compensated or bythe DPC during mA measurecalculations.

10. Once the DPC has completedthis evaluation, it will displaythe post test summary screenwith the SOURCE, MEASURE

and ERROR columns (Figure26). Depress Done.

Figure 26.

11. Now you are presented withthe Tag entry screen (Figure27).

Figure 27.

Press the ENTER key toedit the entries, press Donewhen complete until the splitscreen reappears with thesot key options o: As Let,Adjust, Save, and MoreChoices.

12. At this point, select Adjustand the DPC will source0%, instruct you to Go to3 PSI and measure or 4 mAto 2%. As long as the errorexceeds 2% the Error win-dow in the measure hal othe screen will be in reversevideo. Adjust the zero on theP to I until the error is lessthan 2 %. Next select Go to

100 % and adjust span inthe same way.

13. Ater adjustment is complete,select As Let, Done andManual Test and repeatstep (9). I the adjustmentwas successul, all the errorsin the post run summaryshould be in normal video(Figure 28).

Figure 28.

14. Select Done, Done, andDone again and you aredone!

To review your results in memory, select More

Choices soft key, Review Memory soft key, move your

cursor to the applicable and press ENTER and review

the setup for the test, select Next Page for the results,

depress Tag for its associated label. Select Done and

Done next move your cursor to the applicable As Left

result and depress ENTER and review the setup for the

test, select Next Page for the results, depress Tag

for its associated label. When you are finished review-

ing results, press Done until right-most soft key label

changes to More Choices.

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Note on Uploading Results to Your PC

I you are using a 743/744 or 753/754, you may choose aninstrumentation management sotware package rom this list:

CERT

IF

IEDTOM EET ISO

9001

QU

ALITY

MANAGEMENTSY

STEM

ISO 9001

Fluke CorporationPO Box 9090, Everett, WA 98206 U.S.A.

Fluke Europe B.V.PO Box 1186, 5602 BDEindhoven, The Netherlands

For more information call:In the U.S.A. (800) 443-5853 orFax (425) 446-5116In Europe/M-East/Arica +31 (0) 40 2675 200 orFax +31 (0) 40 2675 222In Canada (800)-36-FLUKE orFax (905) 890-6866From other countries +1 (425) 446-5500 orFax +1 (425) 446-5116

Web access: http://www.luke.com

2010-2011 Fluke Corporation.Specifcations subject to change without notice.Printed in U.S.A. 8/2011 3792201B A-EN-N

Modification of this document is not permittedwithout written permission from Fluke Corporation.

Fluke. Keeping your worldup and running.

8 Fluke Corporation 750 Series Documenting Process Calibrators

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On Time Support

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Additional information is available for download fromwww.fluke.com on these products

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