Physical testing
Microbalance
A very sensitive balance that reads to 0.001 mg (1 µg) or better. It is used when the sample is only a few milligrams, for example a potent reference standard or a DSC sample.
- Pharmaceutical
- Biotech
- Chemicals
- Environmental testing
- Academic research
- Materials science
PREVENTIVE MAINTENANCE
Maintenance checklist
Daily / each use
- Check levelling
- Clean the pan and chamber
- Perform and record the daily check with a small calibrated weight
- Confirm the internal adjustment has run
Weekly
- Clean the draught shield glass with a lint-free cloth
- Check the ioniser works
- Check the room temperature and humidity records for unusual drift
Monthly
- Repeatability check with a small weight (or as defined in your SOP)
- Inspect test weights and their box for dust or damage
Six-monthly / annual
- Full calibration: repeatability, accuracy and minimum weight at the place of use
- Recalibration of test weights by an accredited laboratory
- Preventive maintenance by the manufacturer's engineer
SAFETY
Safety precautions
Before you work on the Microbalance
- Weigh potent or toxic powders in a ventilated enclosure designed for microbalances, wearing gloves and, where required, a mask.
- Clean spills straight away with the approved method; do not blow or brush powder into the air.
- Handle weights and containers with forceps, never bare fingers.
- Keep the weighing table clear; do not place heavy objects on it.
In LimsPulse · Calibration Management
Keep every Microbalance in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.