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5700A/5720A Series II

Operators Manual

5-62

5-47. Verifying a Meter

The following program was written in BASIC for a typical instrument controller. This

program selects 10V dc output, verifies that the calibrator is set to 10V, then triggers an

8840A to take a reading. It displays the calibrator’s output, 8840A reading, and the meter

error in ppm. The program assumes that the calibrator’s bus address is 4 and the 8840A

bus address is 1.

1Ø REM THIS PROGRAM VERIFIES THE ACCURACY OF AN 884ØA AT 1ØV DC

2Ø INIT PORT Ø ! INITIALIZE THE INTERFACE

3Ø CLEAR PORT Ø ! “

4Ø PRINT @1, “F1 RØ SØ T2” ! SET 884ØA FOR VDC, SLOW READ, AUTORANGE

5Ø PRINT @4, “OUT 1Ø V ; OPER” ! SET THE 57ØØA TO 1ØV DC,

6Ø PRINT @4, “*WAI; OUT?” ! WAIT FOR SETTLE, REQUEST OUTPUT VALUE

7Ø INPUT @4, V,U$,F ! GET THE DATA FROM THE 57ØØA

8Ø PRINT @1, “?” ! TRIGGER THE 884ØA TO TAKE A READING

9Ø INPUT @1, VM ! GET THE DATA FROM THE 884ØA

1ØØ ER = ABS(V - VM)/V * 1E6 ! COMPUTE ERROR

11Ø PRINT “57ØØ OUTPUT:”;V;U$ ! PRINT THE RESULTS

12Ø PRINT “884Ø MEASURED:”;VM;”V” !

13Ø PRINT “ERROR:”;ER;”PPM”

14Ø END

5-48. Remote Calibration

You can calibrate the 5700A/5720A Series II Calibrator remotely instead of using the

front panel controls. For external calibration, you need to make connections to the

calibrator’s binding posts during the process, and you need to change the position of the

rear panel CALIBRATION switch. The following paragraphs contain samples of each of

the following programs:

• DC Zeros

• Calibration of the main output functions

• Range calibration

• Wideband AC Module (Option 5700A-03) calibration

5-49. DC Zeros

1Ø PRINT “Starting Zeros Calibration. Please wait . . .”

2Ø PRINT @4,”CAL_ZERO;*OPC?” ! 57ØØA ADDRESS IS 4

3Ø INPUT @4, A

4Ø PRINT “Zeros calibration is finished.”

5Ø END

Fluke 5700A Series II User Manual

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