718Ex 30G/100G/300G
Users Manual
14
To use the Calibrator’s internal pump, refer to Figure 3 and
perform the following steps:
1. Depressurize the line before connecting the
Calibrator.
2. Connect the pressure transmitter under test to the
Calibrator internal sensor as shown in Figure 4 (for
internal pressure sensor measurements) or Figure 5
(for pressure module measurements.)
Note
To avoid leaks, use Teflon tape or similar sealant
on all pressure connections.
3. Make sure the pressure/vacuum switch on the
Calibrator is in the desired position. Forward
(clockwise) is for pressure; backward (counter-
clockwise) is for vacuum.
4. Turn the pressure/vacuum release control backward
(counter-clockwise) to vent pressure/vacuum from the
pump.
5. Press Zto zero the pressure display.
6. Turn the fine adjustment knob to mid-range.
7. Turn the pressure/vacuum release control forward
(clockwise) to close the release valve.
8. Work the pump handle in and out to apply
incrementally larger pressure/vacuum changes.
Shorten the stroke to apply smaller increments of
pressure/vacuum change.
9. To make very small pressure/vacuum changes, use
the fine adjustment knob.
Note
This knob adjusts a small internal reservoir to
vary the total volume. With larger external
pressure/vacuum volumes, this control will adjust
pressure or vacuum within a smaller range.
10. Depressurize the system before disconnecting the
pressure line.
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