Calibration Pump Operating and Maintenance Guide

Calibration Pump Operating and Maintenance Guide

Calibration pumps are essential tools for verifying and calibrating pressure and flow measurement instruments. They generate precise pressures or flow rates to test gauges, transmitters, and sensors.

I. Pre-Operation Setup

1. Inspection: Before each use, inspect the pump body, hoses, fittings, and seals for damage or wear. Check that all connections are tight.
2. Fluid Selection: Use the correct calibration medium as specified. For hydraulic pumps, use clean calibration oil. For pneumatic pumps, use dry, clean compressed air or nitrogen.
3. Device Connection: Connect the device under test securely using appropriate fittings. Ensure the connection is leak-free before pressurizing.
4. Range Verification: Confirm that the pump's pressure range is suitable for the device being calibrated. Never exceed the maximum rated pressure.
5. Venting: Open the vent valve before starting to ensure the system starts at atmospheric pressure.

II. Operating Procedures

1. Priming: For hydraulic pumps, prime the system to remove air bubbles. Air in the system causes inaccurate pressure readings and spongy pump operation.
2. Pressure Generation: Close the vent valve and slowly operate the pump to generate pressure. Use the fine adjustment knob for precise pressure settings.
3. Stabilization: Allow the pressure to stabilize before taking readings. This is especially important when calibrating mechanical gauges with inherent hysteresis.
4. Reading Comparison: Compare the device under test reading with the reference standard at multiple points across the calibration range, typically at 0, 25, 50, 75, and 100 percent of range.
5. Venting: After completing the calibration, slowly open the vent valve to release pressure. Never disconnect fittings while the system is pressurized.

III. Maintenance

• Weekly: Check and clean all fittings and adapters. Inspect seals and O-rings for wear.
• Monthly: Replace hydraulic oil if contaminated. Clean or replace filters. Lubricate pump mechanism per manufacturer specifications.
• Annually: Professional service including seal replacement, pressure verification against a certified standard, and full functional test.