Operation; Disconnecting The Unit From The Deadweight Tester - Fluke P5523 User Manual

P5523
Users Manual
The fluid height must not be above this level during operation — turn the
screw press out (counter-clockwise) to reduce the fluid level.
4. Replace the reservoir cap.

Operation

ALWAYS reduce the system pressure with the Exhaust Valve —
NEVER use the deadweight tester reservoir valve.
1. Ensure both Inlet and Exhaust valves are closed.
2. Place the weights necessary to achieve the desired calibration point on the
3. Slowly open and close the inlet valve until the piston floats. To avoid
4. Use the screw press for fine adjustment of the PCU float height — do not turn screw
5. Ensure that the weights are rotating freely, and allow a few moments for the system
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.
6. Compare the reading of the gauge under test with that of the master gauge.
7. For the next, higher calibration point, repeat from step 2 above.
8. To measure reducing pressures, remove the necessary weights from the deadweight
9. Ensure that the weights are rotating freely, and allow a few moments for the system
10. During long periods of use, the fluid level in the left-hand reservoir should be
11. To depressurize the system fully, slowly open and close the exhaust valve —

Disconnecting the Unit from the Deadweight Tester

1. With the system fully depressurized, remove the reservoir cap from the left-hand
2. Ensure reservoir valve is closed on the deadweight tester, and turn the screw press
6
deadweight tester.
over-pressurization due to "fluid-stick", the weights can be gently rotated close to the
calibration point. The monitor gauge fitted to the separator can be used as a guide to
the system pressure.
press more than 2 turns in or out from its priming position.
to stabilize before taking any readings, especially after large changes in system
pressure.
tester, and slowly open and close exhaust valve, reducing the system pressure until
the piston is floating at its mid-operating position.
to stabilize before taking any readings.
checked, and adjusted if necessary, to maintain the correct datum level. Ensure that
the system is FULLY DEPRESSURIZED before removing the reservoir cap.
NEVER depressurize the system quickly.
reservoir.
out to draw fluid back into the deadweight tester reservoir. (Observe fluid level in
P5523 reservoir.)
Note
W Warning
Note