Refrigerated and frozen cabinet calibration project description | The importance of prior requirements communication before calibration

Many clients are unsure which calibration items are required when scheduling refrigerator or freezer calibration. Common questions include how many test points are needed and whether 24-hour temperature recording is mandatory. In practice, calibration requirements vary depending on equipment usage, stored samples, and internal company regulations. The following overview helps clarify common calibration options.

1. Test Point Configuration

Temperature testing is generally performed using either single-point or multi-point methods:

• Single-Point Testing
Measurement is conducted at a representative location inside the unit. This method is suitable for routine checks or basic temperature verification.

• Multi-Point Testing
Multiple sensors are placed at different positions (e.g., top, middle, bottom or front, center, rear) to evaluate overall temperature distribution and uniformity. This approach is commonly required for critical storage or audit purposes.

2. Temperature Comparison & Recording

Typical calibration activities include:

• Panel Display vs. Reference Temperature Comparison
Actual internal temperature measured by calibrated reference instruments is compared with the unit’s panel display to assess display accuracy.

• Temperature Recording Options
Continuous temperature recording may be performed based on client requirements. Common recording durations include 1, 3, 12, or 24 hours to evaluate temperature stability and fluctuations.

3. Final Requirements Based on Internal Regulations

The number of test points, recording duration, and acceptance criteria should ultimately follow the client’s internal SOPs, quality systems, or audit requirements. READY can assist clients in defining an appropriate calibration plan to ensure compliance without unnecessary testing.

Not sure which calibration items your refrigerator or freezer requires? Contact READY Biotech for assistance in planning a calibration program based on your internal regulations.

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