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mA Measure Verification
The display should indicate:
0.000mA
1. Connect a test lead from Red AUX terminal of the 5520A to the Fluke 8508A I+
terminal.
2. Connect a test lead from Black AUX terminal of the 5520A to the Calibrator Com
terminal.
3. Connect a test lead from I- terminal of the Fluke 8508A to the Calibrator mA terminal.
4. Adjust the 5520A if necessary so that the current shown on the Fluke 8508A is the
same as the 5520A values shown in Table 66.
5. Verify that the display readings on the Calibrator are within the limits.
Fluke 5520A
Fluke 718 (V2.9 and lower)
4.0000 mA
3.998 mA to 4.002 mA
12.0000 mA
11.996 mA to 12.004 mA
24.0000 mA
23.993 mA to 24.007 mA
6. Disconnect the test leads and turn off the 718 Calibrator.
mA Loop Power Verification (718 Only)
1.
Hold down both LOOP POWER keys ( and
reads:
----------
then release the keys.
2. Apply 1.2 kΩ to the mA jacks from the decade box or other resistor source. The
display should read >19 mA but <OL.
3. Push
to turn the Calibrator off.
Sensor Jack Verification
1. Make sure nothing is connected to the sensor port of the Calibrator. Push
the Calibrator on. The display should read:
----------
then change to:
0.000
2. Plug the Fluke Pressure Module into the sensor port of the Fluke 718. The display
should change to:
----------
A pressure value should appear on the screen after all of the calibration constants
have been downloaded.
3. Disconnect the Fluke Pressure Module and push to turn the Calibrator off.
0.00 PSI
Table 66. 718 and 718Ex mA Measure Verification
Fluke 718 (V3.0 and higher)
LOOP mA
3.997 mA to 4.003 mA
11.996 mA to 12.004 mA
23.994 mA to 24.006 mA
) at the same time until the screen
Process Calibrators
Verification
Fluke 718Ex
3.997 mA to 4.003 mA
11.996 mA to 12.004 mA
23.993 mA to 24.007 mA
to turn
51
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