STANDARD OPERATING PROCEDURE CALIBRATION OF CONDUCTIVITY METER

STANDARD OPERATING PROCEDURE

SUBJECT:                      CALIBRATION OF CONDUCTIVITY METER

DEPARTMENT           : QA SOP NO.                      : Page No                       : Effective Date             : Next Review                : SOP REVISION           :

1.0       OBJECTIVE:

To provide guidelines for Calibration of Conductivity meter.

2.0       POLICY: 

To lay down a procedure for calibration of conductivity meter.

3.0       PROCEDURE:

3.1       Switch on the instrument.       

3.2       Put the conductivity cell in the beaker containing Standard solution.

3.3       Select the appropriate conductance range with range knob.

3.4       Measure the temperature of the Standard solution and set the temperature control to the value of the measured temperature.

3.5       Put Read or Check knob in the check position and measure the conductivity of the solution.

3.6       After taking the reading clean the conductivity cell thoroughly with distilled water.

3.7       Preparation of Standard solution.

3.7.1    Dissolve 7.474 g of AR grade KCl in one liter of double distilled water to get 0.1N KCl solution.

3.7.2    Transfer 10 ml of the KCl solution to a 100 ml volumetric flask. Make up with distilled water and mix well to get 0.01N KCl.

3.7.3    Specific conductance of KCl solution of different normality’s are as follows:

            S No    Normality       Conductivity (in m mhos)

            01        0.01N KCl       1.413 +/-0.05 (1.363-1.463)

4.0       FREQUENCY:  Once in three months.

5.0       RESPONSIBILITY: Executive (QA).

6.0       REVIEW GUIDE: Calibration Record.

7.0       ANNEXURE: -------

8.0       SOPs DISTRIBUTION:

            This SOP shall be distributed to following Departments:

Name of the Department	Master Copy	Circulatory Copy
QA/QC	√	√
Production	x	x
Warehouse	x	x
General	x	x
Maintenance	x	x