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
Microbalance calibration procedures
Repeatability
Weighs one small test weight ten times and calculates the standard deviation, then checks it against the smallest sample the lab weighs.
Open procedureAccuracy
Weighs a calibrated weight between 5% and 100% of capacity and compares the reading with its certified value. Also called the sensitivity test.
Open procedureMinimum weight
Finds the smallest net mass that can be weighed on the microbalance while meeting the 0.10% requirement, using a small weight at the place of use.
Open procedureInstrument qualification (DQ · IQ · OQ · PQ)
- 01
DQ — Design qualification
Defines capacity, readability, the minimum weight needed for the smallest samples, the room and table requirements, and data integrity features.
- 02
IQ — Installation qualification
Confirms installation on a free-standing anti-vibration table in a suitable room, records serial numbers, firmware and accessories, and checks power and levelling.
- 03
OQ — Operational qualification
Tests repeatability, accuracy (sensitivity) and eccentricity against the specification with calibrated weights (often OIML class E1 or E2).
- 04
PQ — Performance qualification
Shows consistent performance at the place of use: daily checks, periodic repeatability and minimum weight determinations under real conditions.
Keep every Microbalance in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.