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7. Press any key on the 718 Calibrator. The display should read:
-----
then change to:
rAnGE
Pressure Measure
The 718 Pressure Calibrators have 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. Remove two-wire test lead from the 718 Calibrator and carefully attach the pressure
fitting of the deadweight tester to the pressure jack on the 718 Calibrator.
The use of TEFLON tape at the pressure fittings strengthens the seal.
2. At this point, the display should be indicating "rAnGE". This is an indication to
choose the correct model of the 718 Calibrator.
For 718 30G, press the
flash for a short time:
------
then display:
CAL
3. Vent the system to ambient air to ensure 0.00 PSI.
Press any key on the 718 Calibrator. The display will change to read:
CAL
then change to:
CAL
or
CAL
depending on which model /range was selected in step 2.
5. Set up the deadweight tester for either 30 PSI or 100 PSI to be injected into the
pressure port of the 718 Calibrator.
Once the pressure has stabilized, press any key on the 718 Calibrator. The display
should read:
CAL
then change to:
CAL
or
CAL
depending on which model /range was previously selected.
6. Set the deadweight tester for either 15 PSI or 50 PSI.
24.00 mA
Note
m
key. For 718 100G, press the
rAnGE
0.00 PSI
------ PSI
30.000 PSI
100.00 PSI
------ PSI
15.000 PSI
50.00 PSI
Process Calibrators
M
key. The display will
Calibration
63
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