71X Series
Calibration Manual
72
1. Remove two-wire test lead from the 718Ex Calibrator and carefully attach the
pressure fitting of the deadweight tester to the pressure jack on the 718Ex Calibrator.
Note
The use of TEFLON tape at the pressure fittings strengthens the seal.
2. The lower display shows rAnGE. This is an indication to choose the correct model of
the 718Ex Calibrator. The appropriate range for the 718Ex 30G is 30 and 100 for the
718Ex 100G. Choose the correct range.
3. The upper display shows 30, which is the default pressure range. Pressing
c
changes the sensor range to 100 PSI, pressing h changes it back to 30 PSI.
4. After selecting the proper range, press
D on the 718Ex Calibrator.
5. Vent the system to ambient air to ensure 0.00 PSI.
6. The lower display indicates C 0 PSI and the upper display indicates the current
reading. When the unit is vented (step 5) the upper display will read 0.00 +/-
approximately 10 % of full scale. When
D is pressed, the lower display indicates
the next pressure to apply. Apply the requested pressure that shows on the lower
display and when the upper reading is stable, press
D. Repeat this until CHEC
appears on the display.
7. The CHEC mode allows for a quick check of the calibration constants that have just
been stored. Changes to the applied pressure reflect on the display. Press
D to
continue. The unit will then reset power.
8. The 718Ex Calibrator is now out of the CAL mode and into the normal mode of
operation. Carefully vent all pressure, press O to turn the calibrator off, and
disconnect all pressure fittings.
To Next Page
Loading...
