Instrument Calibration Protocol for temperature and humidity chambers
| INSTRUMENT | |
| Refer SOP No. | |
| Model No. | |
| Instrument ID. No. | |
| Frequency | Half yearly “-15 days” |
| Date of Calibration | |
| Next Due Date |
Condition: 25°C/60% RH, 40°C/75% RH, 30°C/65% RH, 30°C/75% RH, 25°C/40%
RH &40°C/20% RH
1) Accuracy:
- Place appropriate number of calibrator sensor of Temperature & RH near Temperature & RH sensor (Enviro/Master sensor) of stability chamber based on the number of sensors present in
the stability chamber.
- Record the Temperature & RH for accuracy study at 5 minutes intervals for the time duration specified for 1 hour.
- Set Temperature & RH: _______________
Calibrator:
| Record | Temperature (ºC) | Relative Humidity (% RH) |
| Average |
Stability Chamber:
| Record | Temperature (ºC) | Relative Humidity (% RH) |
| Average |
| Difference | Temperature (ºC) (± 0.2 ºC) | Relative Humidity (% RH) (±2 % RH) |
2) Verification:
- Place 1 calibrator sensor of Temperature & RH nearthe eachTemperature & RH sensor of stability chamber.
- Record the Temperature & RH for 5 minutes for the time duration specified for 1 hour.
Calibrator:
Record Average Temperature and Relative Humidity
| Channels | Temperature (ºC) | Relative Humidity (% RH) |
| CH-1 | ||
| CH-2 | ||
| CH-3 | ||
| CH-4 | ||
| CH-5 | ||
| CH-6 | ||
| CH-7 | ||
| CH-8 | ||
| CH-9 | ||
| CH-10 |
Stability Chamber
Record Average Temperature and Relative Humidity
| Channels | Temperature (ºC) | Relative Humidity (% RH) |
| CH-1 | ||
| CH-2 | ||
| CH-3 | ||
| CH-4 | ||
| CH-5 | ||
| CH-6 | ||
| CH-7 | ||
| CH-8 | ||
| CH-9 | ||
| CH-10 |
Limits for Difference:
Temperature (ºC): ± 0.5 ºC
Relative Humidity (% RH): ±2 % RH
| Channels | Temperature Difference (ºC) | Relative Humidity Difference (% RH) |
| CH-1 | ||
| CH-2 | ||
| CH-3 | ||
| CH-4 | ||
| CH-5 | ||
| CH-6 | ||
| CH-7 | ||
| CH-8 | ||
| CH-9 | ||
| CH-10 |
Acceptance Criteria:
1) For Accuracy: Difference of the temperature & RH between calibrator and actual temperature of chamber should be within the Specified Limit of ± 0.2° C & ± 2 % respectively
2) For Verification: Difference between Temperature & RH of calibrator & Temperature & RH sensor should be within the specified limits of ± 0.5°C & ± 2 % RH respectively.
Conclusion: Calibration found satisfactory/ not satisfactory.
Calibrated By (Sign/ Date)
Checked By (Sign/ Date)
