Troubleshooting - Ralston Instruments DP0V Serie Manual De Operación

Troubleshooting

Dépannage ......................................22
Diagnóstico de problemas ...............23
故障排除 ..........................................24
Устранение неполадок ..................25
The pump will pump up, but pressure slowly decreases
EN
If the pump will pump up, but pressure slowly decreases, then there is an
external leak. Follow these instructions to locate and repair the leak:
1. Connect the pump to a Device Under Test (DUT) with a Ralston
Quick-test™ hose.
2. Make sure the process connections are assembled wrench-tight.
3. Pressurize the Hand Pump.
4. Spray soapy water or leak detection fluid where leaks are suspected
or immerse the pump in water. Be careful not to immerse the pressure
gauge or calibrator.
5. Observe where bubbles are forming to determine where there is a leak.
6. Remove the leaking part and remove the cut or damaged O-ring.
7. Clean and lubricate the O-ring.
8. Replace the O-ring and reassemble.
Pumping Piston pushes out by itself and pressure decreases
If the Pumping Piston pushes out by itself and pressure decreases, then
the internal Check Valve is not functioning properly. Follow the instruc-
tions to replace the internal Check Valve:
1. Remove the Pumping Piston.
2. Remove the Internal Check Valve.
3. Clean and lubricate the Check Valve.
4. Reinstall the Check Valve.
5. Reinstall the Pumping Piston.
When the Pumping Piston is pumped, pressure does
not increase and air is felt coming out of the external
Check Valve located opposite of the Bleed Valve.
If when the Pumping Piston is pumped, pressure does not increase and
air is felt coming out of the External Check Valve located opposite of the
Bleed Valve, then the External Check Valve is not functioning properly.
Follow instructions to replace the External Check Valve:
1. Remove the External Check Valve
2. Clean and lubricate the External Check Valve.
3. Reinstall the External Check Valve.
Solução de problemas .....................26
Diagnostica ......................................27
Fehlerbehebung ..............................28
21