E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL
© 2008 DH Instruments, a Fluke Company
Page 12
Check that the stainless steel plug is installed in the E-DWT TEST port and that the gland
holding the plug is tight.
Slowly lift the reservoir pump handle and then depress at moderate speed with firm, even
pressure. With a brief delay, the pressure indicated by the RPM4-E-DWT should rise. If
the pressure does not rise above 20 psi (130 kPa), it is likely there is air in the E-DWT
hydraulic circuit, most likely in the low pressure PFA tubing between the reservoir and the
rest of the system. It is normal for the pressure to drop when the reservoir pump is
released since the pump is vented by releasing it.
Close the reservoir shut off valve and check that the test shut off valve is open.
Slowly rotate the variable volume CW and observe the RPM4-E-DWT display. The
indicated pressure should increase. Slowly increase the pressure to 1000 psi (7 MPa)
and stop. The pressure should decrease, more and more slowly, and eventually
stabilize. If the pressure decreases indefinitely (more than 5 minutes), there is probably a
leak in the E-DWT and it may require service.
Rotate the variable volume handle CCW to reduce pressure to about 100 psi (700 kPa)
and open the reservoir shut off valve.
Put the Lo Q-RPT shut off valve into the Lo Q-RPT Shut Off position (valve rotated fully CW).
This isolates the Lo Q-RPT from the E-DWT pressure generation and control system.
Use [RANGE] (see Section 3.7.2) to select the Hi Q-RPT.
If the red CAUTION indicator flashes and/or an audible alarm sounds at any time,
immediately reduce pressure to avoid damaging an E-DWT Q-RPT.
Close the reservoir shut off valve and check that the test shut off valve is open.
Slowly rotate the variable volume CW and observe the RPM4-E-DWT display. The
indicated pressure should increase. Slowly increase the pressure to 10 000 psi (70
MPa), stop and wait. The pressure should decrease, more and more slowly and
eventually stabilize. If the pressure decreases indefinitely (more than 5 minutes), there is
probably a leak in the E-DWT and it may require service.
Rotate the variable volume handle CCW to reduce pressure to about 100 psi (700 kPa)
and open the reservoir shut off valve.
2.5
SHORT TERM STORAGE
The following is recommended for short term storage (not shipping or transport) of E-DWT-10000-AF:
•
Open the reservoir shut off valve.
•
Disconnect
power.
