Refrigerator / deep freezer
Pharmaceutical-grade cold storage for reference standards, reagents, culture media, samples and temperature-sensitive products, typically at 2–8 °C (refrigerator), −20 °C (freezer) or −80 °C (ultra-low).
- Pharmaceutical
- Biotech
- Hospitals & blood banks
- Clinical research
- Food testing

Fridge / freezer calibration procedures
Instrument qualification (DQ · IQ · OQ · PQ)
- 01
DQ — Design qualification
Defines the temperature range, capacity, uniformity, alarm and monitoring requirements and whether a flammable-safe unit is needed.
- 02
IQ — Installation qualification
Checks model, serial number, location (ventilation clearance), power supply, alarm wiring and documents.
- 03
OQ — Operational qualification
Empty-chamber mapping, controller accuracy, door-opening recovery, power-failure hold-over time and alarm tests.
- 04
PQ — Performance qualification
Loaded mapping over typically 24–72 hours to prove the unit holds its range in routine use.
Keep every Fridge / freezer in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.