Calibration of pH Meter

1.0      Purpose:  To ensure smooth running of PH meter with desired accuracy. 2.0   Scope    :   This SOP applies to the calibration of PH meter. 3.0   Definitions:  Nil 4.0      Responsibility:  QC officer. 5.0   Procedures    : 5.1          Place buffer 4.0 or 7.0 in the vessel & press CAL / MEANS after switching on the Machine. 5.2          Press CON button & enter the value selected for Calibration & record the reading. 5.3          The electrode of PH meter is immersed in the buffer solution of PH 4.0 & adjusting The meter to the appropriate PH value. Ref. BP-93  APPENDIX VM (Table-2) How to use the PH meter: 1)      Press the button CAL / MEANS 2)      Select the next higher PH buffer setting in the PH calibration mode. 3)      Select the next lower PH buffer setting in the PH calibration mode. 4)      Press CON button & enter the value selected for calibration.