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SOP for Calibration of pH Meter Temperature Sensor

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SOP for Calibration of pH Meter Temperature Sensor

Standard operating procedure for the calibration of pH meter temperature sensor using water for injection (WFI) / purified water (PW).

 

1.0 Objective

To provide a standard operating procedure for the calibration of pH meter temperature sensor.

 2.0 Scope

This procedure is applicable to pH meter.

  3.0 Responsibility

  Doing: Technical Assistant/Executive

  Checking: Executive /Manager

 4.0 Accountability : Head of the Department

Procedure Frequency: Twice in Year.

Calibration Procedure for pH meter temperature sensor. Keep the sensor probe of reference calibrated digital thermometer in the beaker containing water for injection (WFI) / purified water (PW) of about temperature 35°C.

Add cold WFI/PW slowly drop wise and bring the temp. between 27°C to 30°C.

Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in 

format as Annx. I.

Add WFI/PW in some more quantity slowly drop wise to bring the temp. between 26°C to 23°C.

Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in 

format as Annx. I.

Add cold WFI/PW slowly drop wise and bring the temp. between 20°C to 22°C.

Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in 

format as Annx. I.

Acceptance Criteria : ± 3°C

 5.0 Abbreviations

  °C= Degree centigrade

 

ANNEXURE-I

Q. C. Department

PH METER TEMPERATURE SENSOR RECORDS

Calibrated Ref. Digital Thermometer No.:                                      Ref. 

Thermometer Calibration date       :                                         Ref. 

Thermometer Certificate No.         :                                          Ref. 

Thermometer Calibration Due Date : 

                                      pH meter ID.No.                                         :                                          

Results Observed:

Set Range

 

 

Observation

Difference

Tolerance

Temperature as read

on pH meter

Temperature as on read on

display of Ref. Thermo.

30°C to 27°C

 

 

 

 

 

±0.3°C

26°C to 23°C

 

 

 

22°C to 20°C

 

 

 

 

REMARKS                :

Calibration date   : 

Next Calibration date : 

Calibrated by :

Checked by   :


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