The PH meter

الرمحن الرحيم بسم اهلل

عدادا

صفية الرزاميد.

SOP For PH meter

The PH meter

OBJECTIVE

To describe the procedure for operation of pH meter

SCOPE This SOP is applicable for the operation of pH meter

RESPONSIBILITY

Officer/ Executive - Quality Control

ACCOUNTABILITY

Manager - Quality Control

PROCEDURE

Operation of pH meter

1 - Ensure that the instrument is on clean and dry

platform. 2 - Ensure that the instrument is clean. 3 - Switch on the main power supply to the instrument

that displays reads “NAME OF INSTRUMENT pH meter”. 4- Press mode, it will display “pH mode Press ENTER or

MODE” Press enter to entering in pH mode. 5- Ensure that the instrument is calibrated. (If the

instrument is calibrated the display shows I on the right

side of the display window,

Standard operating procedure of pH

Meter

The PH meter

If instrument is not calibrated, display shows N on the

right side of the display window) 6-If it is not calibrated, calibrate the instrument before use. 7 - Remove the pH electrode from the storage solution and rinse

it with purified water 2-3 times. Soak the excess water with tissue

paper and insert the pH electrode and temperature sensor in the

sample beaker. 8 - Stir the sample solution keeping the pH electrode and resistant

temperature detector immersed. 9 - Allow stabilizing the pH and then record the pH. The display

shows the pH of sample, temperature °C, mV and calibration

status as I. 10- Press ENTER to take print of the observation. 11- Select the start mode By”.” Key. 12 - If it is in standard mode the display will show. 13 - After completion of pH measurement rinse the

electrode and temperature sensor with the purified water,

soak the excess water with tissue paper and insert the pH

electrode and temperature sensor in the storage

solution (Buffer of pH 7 having 1 gm Potassium chloride

in 100 ml). 14- After measurement enter details in usage log book and

switch down the power.

In this procedure the PH meter can use in frequent times

with maintance the quality….