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71X Series
Calibration Manual
mA Output Calibration
1.
2.
3.
4.
Pressure Measure
The Calibrator has built-in temperature compensation. Instruments being calibrated
should be in a stable temperature environment for several minutes before calibration.
Calibration facilities should be maintained near 23 °C nominal. Re-calibration (re-
characterization) is performed in terms of PSI pressure units. Inputs using other pressure
units (ie. kPa and bar) must be mathematically converted.
1.
The use of TEFLON tape at the pressure fittings strengthens the seal.
82
Connect a test lead across the Fluke 719 mA jacks, connecting red to black.
Push to start the mA source calibration.
The unit will start its auto-calibration process for the mA output using an internal
mA measurement circuit calibrated at previous stage. It will generate 17 different
output values, measure each of them, and save the measured values as calibration
points.
•
The upper display indicates measured output current in mA for the point which
is being calibrated.
•
The lower display indicates expected output current in mA for the point which is
being calibrated.
•
During this process the unit checks if the measured values fit in ±15 % range of
expected values. If all 17 values are within range, the upper display indicates
DONE.
•
If any of these values were out of the range, the upper display indicates ErrOr
and the lower display shows the amount of errors.
•
The mA OUTPUT self-calibration takes approximately 30 seconds.
Push to continue. The lower display changes to:
rAnGE
Disconnect the test lead from the 719 Calibrator mA jacks and carefully attach the
pressure fitting of the deadweight tester to the Calibrator's pressure jack.
The lower display shows rAnGE.
The upper display should show appropriate range for the 719 as follows:
•
For the 719 30G, upper display should show 30.
•
For the 719 100G, upper display should show 100.
Note
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