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Troubleshooting
Dépannage ......................................27
Diagnóstico de problemas ...............28
故障排除 ..........................................30
Устранение неполадок ..................31
There is a drop in system pressure when the Volume
EN
Controller has been pressurized and the Fill Valve is closed
If there is a drop in system pressure when the Volume Controller has
been pressurized and the Fill Valve is closed, then there is a leak. Fol-
low these instructions to locate and repair the leak:
1. Connect the Volume Controller to a Device Under Test (DUT) and
connect a Ralston Quick-test™ hose to the Inlet Port.
2. Make sure the process connections are assembled wrench-tight.
3. Close Vent Valve.
4. Open Balance and Fill Valves.
5. Apply pressure to unit.
6. Close Fill Valve.
7. Spray soapy water or leak detection fluid where leaks are suspected or
immerse the Volume Controller in water. Be careful not to immerse the
pressure gauge or calibrator.
8. Observe where the bubbles are coming from to determine where there
is a leak.
9. Remove the leaking part and remove the O-ring.
10. Clean and lubricate the O-ring, and backup ring if applicable.
11. Replace the O-ring, and backup ring if applicable.
12. Reassemble.
Fine Adjust Valve is difficult to operate
If the Fine Adjust Valve is difficult to operate over years of service, then
the inside walls of the piston need grease.
1. Remove the Fine Adjust Valve.
2. Apply a thin coat of graphite grease, such as Dow Corning
Moly-kote G-n Metal Assembly Paste (or equivalent) to the inside
walls of the piston.
3. Reassemble.
The Volume Controller does not adjust pressure
If the Volume Controller does not adjust pressure, then the O-rings in
the Balance Valve and/or Fine Adjust Valve need to be cleaned and
lubricated.
1. Remove the Balance Valve assembly from the front of the panel.
2. Clean and lubricate the O-ring.
3. Replace the O-ring.
26
Solução de problemas .....................33
Diagnostica ......................................34
Fehlerbehebung ..............................36
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