Calibration Pump Troubleshooting and Preventive Maintenance
Regular maintenance and timely troubleshooting keep calibration pumps operating reliably, ensuring accurate field calibrations and minimal downtime.
I. Common Problems and Solutions
Inability to Build Pressure: Check that the vent valve is fully closed. Inspect all connections and fittings for leaks using leak detection spray. Check the check valve for debris or damage. Verify that the pump seals are intact and properly seated.
Pressure Drops After Pumping: This indicates a leak in the system. Check all connections starting from the pump output. Inspect the device under test for internal leaks. Check the vent valve for proper sealing. Use leak detection fluid on all joints.
Pump Feels Spongy (Hydraulic): Air is trapped in the hydraulic system. Bleed the system thoroughly. Check hydraulic fluid level and top up if needed. Inspect for suction-side air leaks.
Erratic Pressure Readings: Check for contamination in the hydraulic fluid. Verify that the reference gauge is functioning correctly. Inspect for loose connections causing intermittent leaks.
II. Preventive Maintenance Schedule
Before Each Use
- Inspect hoses and fittings for cracks or wear
- Check fluid level (hydraulic pumps)
- Verify pump operates smoothly through full range
- Test all connections for leaks at low pressure
Monthly
- Replace hydraulic fluid (or more frequently in dusty environments)
- Clean pump body and fittings with approved solvents
- Inspect and lubricate pump shaft and linkages
- Test pump output against a certified reference gauge at multiple points
Annually
- Complete seal and O-ring replacement kit installation
- Professional calibration of reference gauge
- Pressure safety valve test and adjustment
- Full functional test across entire operating range
