Purpose:
To verify and adjust temperature sensors (RTD/PT-100) and thermocouples so readings match a certified reference standard.

Method (Comparison):

1. Visual Check – damage, cable, range.
2. Ice Point Test (0°C) – check zero error using ice bath.
3. Dry Block / Oil Bath Test – compare test probe with reference probe at multiple temperature points.
4. Record Readings and calculate error:

$$Error = Observed − Standard$$Error=Observed−Standard

Thermocouple Note:
Measure output in mV and compare with standard thermocouple table (apply cold junction compensation).

Typical Points:
25°C, 50°C, 100°C, 200°C, 300°C (as per range)

Frequency:
6–12 months (or as per process criticality)

Output:
Calibration certificate with error, uncertainty, and traceability.