Moisture Analyzer Calibration
Preventative Maintenance
- Cleaning: After each use, remove sample residues from the pan, chamber, and heating element shield to prevent buildup, corrosion, or uneven heating. Use a soft brush or lint-free cloth; avoid harsh chemicals.
- Heating Element Inspection: Check the halogen lamp and protective glass for discoloration, cracks, or deposits that could affect heating performance.
- Balance Care: Keep the weighing mechanism free from dust and vibrations; avoid overloading the pan.
- Ventilation & Environment: Ensure proper airflow around the unit, free from drafts, temperature fluctuations, or high humidity that can skew results.
- Firmware & Settings: Verify software parameters are correctly set for drying programs; update firmware if applicable.
- Periodic Professional Service: Replace lamps, seals, or filters as recommended by the manufacturer.
Calibration
- Balance Calibration: Perform internal or external calibration using certified test weights to verify accuracy of the weighing system.
- Temperature Calibration: Use a calibrated temperature probe or manufacturer’s test kit to verify that the halogen heater reaches and maintains the set temperature. Adjust if deviations exceed tolerances.
- Performance Verification: Run moisture tests with reference materials of known water content to check system accuracy under real conditions.
- Tolerance Limits: Compare results against ISO/IEC 17025, GLP/GMP, or manufacturer specifications. Common checks include balance linearity (using weights), temperature accuracy (±1–2 °C), and repeatability of drying results.
- Documentation: Record all calibration results, adjustments, and maintenance actions for audit and compliance traceability.