2. 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
3. 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….
