SOP For Calibration procedure for pH meter

SOP For Calibration procedure for pH meter

  • OBJECTIVE
  • To describe the calibration procedure for   pH meter.
  • SCOPE
  • This SOP shall be applicable for the calibration procedure for pH meter
  • RESPONSIBILITY
  • Quality Control Executive/Officer.
  • ACCOUNTABILITY
  • Quality Control   Manager
  • PROCEDURE
  • Operate the Instrument as per procedure.
  • Insert the pH electrode and temperature sensor in buffer solution pH 4.0
  • Press the CAL 4 key followed by ENTER key, the LCD displays  shows  the   pH after calibrating.
  • Remove the electrodes from buffer pH 4.0.  Rinse with distilled water and insert the electrode in buffer solution pH 9.2.
  • Press the CAL 9.2 key followed by the ENTER key, the LCD displays the  pH after calibrating.
  • Standardisation
  • Standardise the instrument using buffer solution pH 7. Rinse the electrode with distilled water        and insert into buffer solution pH 7.
  • Press the STD 7 key, followed by ENTER key, the LCD displays the pH after standardisation. All the calibration should be done at a  temperature 25°C ±  2°
  • Switch off the main power supply.
  • Fill  the  details  of  the  calibration  status  in the  label   pasted  on the  Instrument / Apparatus.
  • Report  any  discrepancy  observed during calibration to Quality  Control  Manager and  notify the defect  to  engineering  department  or  Service  Engineer of  the  instrument. Affix  an  Under Maintenance label on  the   instrument.
S.NO. PARAMETER STANDARD TOLERANCE FREQUENCY REFERENCE
1

 

 

pH

 

 

 

pH  Tablet  or capsule

pH =  4.0

pH = 7.0

pH =  9.2

 

± 0.05

± 0.05

± 0.05

Prepare the standard buffer Weekly   for Standardization of pH meter In house

 

 

  • Forms and Records (Annexures)
  • Not Applicable
  • Distribution
  • Master copy –  Quality Assurance
  • Controlled copies- Quality Assurance, Production, Quality Control.engineering
  • History
    Date Revision Number Reason for Revision
    00 New SOP

 

 

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