Maintenance methods for gas mass flow meters

I. Daily Maintenance

Cleaning & Inspection?

Regularly remove dust from sensor surfaces using compressed air or approved cleaning agents (avoid corrosive solvents)?.

Check seals monthly with soap solution for leaks; replace aging O-rings promptly?.

Parameter Monitoring?

Verify display readings for abnormalities (e.g., ±5% deviation triggers calibration)?.

Record flow/temperature trends to detect early performance degradation?.

II. Periodic Calibration

Zero Adjustment?

Perform quarterly zero checks (monthly for trade metering) under no-flow conditions?.

Ensure pipes are fully filled with media during calibration?.

Laboratory Calibration?

Return to factory every 1-2 years for full-scale calibration using standard weights (e.g., Micro Motion HPC)?.

Document calibration certificates and compare historical data?.

III. Environmental & Installation Optimization

Vibration Control?: Install rubber isolators or independent supports (>1m from vibration sources)?.

Temperature Management?: Use insulation/heat tracing for fluids with large temperature swings (-40~70℃ range)?.

Stress Relief?: Loosen flange bolts during installation to allow natural alignment before re-tightening?.

IV. Troubleshooting

No Signal?: Check power connections, shielding, and EMI sources.

Measurement Errors?: Validate media properties (density, impurities) and sensor coil resistance?.

Key Notes?:

Follow manufacturer manuals strictly; involve professionals for explosion-proof scenarios?.

Maintain digital logs of maintenance history and calibration records?.