GE 5514, User Manual, Page: 13 / 23

SECTION 3.0
OPERATION
Priming:
3.1 Open reservoir valve (13) one turn counter-clockwise and turn screw press fully in.
3.2 Close* valve (13) and turn screw press fully out.
3.3 Open valve and turn screw press fully in.
Note: During this operation, bubbles may appear in the reservoir, as trapped air is
expelled. For large volumes, repeat steps 3.2 & 3.3 until no further bubbles
appear.
3.4 With valve open, turn screw press fully out and close valve. The test pump is now
ready for use.
* WARNING
Turning the capstan out with the reservoir valve closed will generate approximately
15 inHg / 0.5 bar vacuum. If the DUT is vacuum sensitive, leave valve (13) open
during priming operation.
Operation:
WARNING
Do not exceed the maximum working pressure of the instrument (Stated on the
instrument label).
3.5 Turn the screw press in to generate pressure.
3.6 Allow a few moments for the system to stabilize before taking any readings,
especially after large changes in system pressure.
Note: Large, sudden changes in pressure will cause the system temperature to rise or fall,
which can cause instrument readings to change as the fluid in the system expands or
contracts, thus increasing or decreasing the pressure.
3.7 Compare the reading of the gauge under test with that of the master gauge.
3.8 For the next, higher calibration point, repeat from step 4.1 above.
3.9 To measure reducing pressures, turn the screw press out (counter-clockwise).
3.10 Depressurize the system by turning the screw press FULLY OUT, then open the
reservoir valve – Never release the system pressure by using the reservoir valve
alone, as sudden depressurization will “shock” the system, which may cause damage
to sensitive instruments attached to it.
3-1 PRIMING