To provide a standard operating procedure for the calibration of pH meter temperature sensor.
This procedure is applicable to pH meter.
3.1 Doing : Technical Assistant/Executive
3.2 Checking : Executive /Manager
Head of the Department
Frequency :Twice in Year.
5.1 Calibration Procedure for pH meter temperature sensor
5.1.1 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.
5.1.2 Add cold WFI/PW slowly drop wise and bring the temp. between 27°C to 30°C.
5.1.3 Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in format as Annx. I.5.1.4 Add WFI/PW in some more quantity slowly drop wise to bring the temp. between 26°C to 23°C.
5.1.5 Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in format as Annx. I.
5.1.6 Add cold WFI/PW slowly drop wise and bring the temp. between 20°C to 22°C.
5.1.7 Compare the temp. shown by reference calibrated digital thermometer and pH meter & record it in format as Annx. I.
5.1.8 Acceptance Criteria : ± 3°C
6.1 oC= Degree centigrade
PH METER TEMPERATURE SENSOR RECORDS
ISSUE DATE: _________________
ISSUED BY :____________________
Calibrated Ref. Digital Thermometer No.:____________________
Ref. Thermometer Calibration date :____________________
Ref. Thermometer Certificate No. :____________________
Ref. Thermometer Calibration Due Date : ____________________
pH meter ID.No. : ___________________
Temperature as read on pH meter
Temperature as on read on display of Ref. Thermo.
30°C to 27°C
26°C to 23°C
22°C to 20°C
Calibration date :
Next Calibration date :
Calibrated by :
Checked by :
Ankur Choudhary is India's first professional pharmaceutical blogger, author and founder of Pharmaceutical Guidelines, a widely-read pharmaceutical blog since 2008. Sign-up for the free email updates for your daily dose of pharmaceutical tips.
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