Crystal GaugeCalHP Pressure Comparator - Manual (Page 13)

Operating Instructions  11
GaugeCalHP Comparator Operation Manual
3 Press the
(
zero
)
button on your reference.
We recommend that you exercise the device under test by applying the full scale pressure one or more times.
4 To apply pressure… Turn the handle in a clockwise direction.
5 To decrease pressure… Turn the handle in a counter-clockwise direction.
After decreasing the pressure to zero, recheck the fluid level in the reservoir and rezero the reference, if necessary. You will notice that the application of
pressure is non-linear, therefore pressure increases at a more rapid rate at higher pressures.
6 Turn the handle clockwise until the approximate pressure is obtained.
7 Allow time for the adiabatic effect to stabilize.
8 Use the fine adjust knob to obtain the exact pressure.
9 Compare the pressure on the device under test to the pressure displayed on the reference, and record the reading.
Checking the accuracy of an analog pressure gauge against the display of the reference.