Pressure Measure - Fluke 71X Series Calibration Manual

71X Series
Calibration Manual
9. Push  to continue. The lower display changes to:

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
(recharacterization) is performed in terms of PSI pressure units. Inputs using other
pressure units (kPa and bar, for example) must be mathematically converted.
1. Disconnect the test lead from the 718 Calibrator mA jacks and carefully attach the
The use of TEFLON tape at the pressure fittings strengthens the seal.
2. After you check the proper range, push  to continue.
3. Vent the system to ambient air to ensure 0.00 PSI or 0.000 PSI.
4. When you push , the lower display shows the next pressure to apply.
5. Apply the requested pressure that shows on the lower display and when the upper
6. Repeat this until lower display shows negative pressure.
7. Turn the pressure/vacuum switch to the vacuum position.
8. Apply requested negative pressure and push .
9. Push  to continue. The 718 will restart in normal mode.
10. Carefully vent all pressure, push to turn the 718 off. Disconnect all pressure
78
The CHEC mode allows for a quick check of the calibration constants that have just
been stored. Changes to the applied current are shown in the display.
rAnGE
pressure fitting of the deadweight tester to the Calibrator's pressure jack.
The lower display shows rAnGE.
The upper display should show the full-scale range for the 718, for example:
•
For the 718 1G, upper display should show 1.
•
For the 718 100G, upper display should show 100.
The lower display shows 0 PSI and the upper display shows the current reading.
When the unit is vented, the upper display will show 0.00 ± approximately10 % of full
scale.
reading is stable, push .
CHEC shows on the lower display.
The CHEC mode allows for a quick check of the calibration constants that have just
been stored. Changes to the applied pressure are shown on the display.
The 718 is now out of the Calibration mode and in the normal mode of operation.
fittings.
Note