Process Calibrators
Calibration
75
The lower display shows 0 PSI and the upper display shows the current indication.
When the unit is vented, the upper display reads 0.00 ± approximately10 % of full
scale. When is pushed, the lower display shows the subsequent pressure to
apply.
4. Apply the requested pressure that shows on the lower display and when the upper
indication is stable, push .
5. Do step 4 again until the lower display shows negative pressure.
6. Apply requested negative pressures, push . CHEC is shown on the lower display.
7. The CHEC mode lets you quickly examine the calibration constants that have just
been stored. Changes to the applied pressure are shown on the display.
8. Push to continue. The Calibrator will restart in normal mode.
9. The 717 is now out of the calibration mode and into the normal mode of operation.
Carefully vent all pressure, push to turn the 717 off.
10. Disconnect all pressure fittings.
718 Calibration (Earlier than V2.0)
mA Measure
1. On the 718 Pressure Calibrator hold down both the
and keys. Push and
release the key.
2. When the display momentarily shows CAL, release the
and the keys. This
puts the 718 into Cal Mode. The 718 should display:
CAL 0.000 mA
3. Connect the test leads from the AUX jacks of the Fluke 5520A to the mA jacks on
the 718 Calibrator (black to black and red to red).
4. Set the Fluke 5520A to 0.00000 mA and push O.
5. Push any key on the 718 Calibrator. The display should read:
----- 0.000 mA
then change to:
CAL 24.000 mA
6. Set the Fluke 5520A to 24.0000 mA.
7. Push any key on the 718 Calibrator. The display should read:
----- 24.00 mA
then change to:
rAnGE
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