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Procedure for calibration of conductivity meter (PICO). Quality Assurance

  • OBJECTIVE
  • To lay down the procedure for calibration of pH / CONDUCTIVITY METER (PICO)
  • SCOPE
  • This Standard Operating Procedure (SOP) is applicable for pH meter (PICO).
  •  RESPONSIBILITY
  • Quality Control Executive / Officer.
  • ACCOUNTABILITY
  • Quality Control   Manager
  • PROCEDURE
  • Operate the Instrument as per procedure no.   BA(II)QA217
  • Calibrate the instrument by preparing the three standard solutions as given in Table – 1 (BP standards) of potassium chloride using carbon dioxide free water. Prepare it from distilled water, the conductivity of which does not exceed 2s cm-1.
  • Table – 1
S No. Standard Wt in g Dilution

(With water)

Acceptance Criteria Tolerance
1. KCl 0.7455 1000ml 1330 µs cm-1. ± 2 % of Standard value.
2. 0.0746 1000ml. 133 µs cm-1
3. 0.0149 1000ml. 26.6 µs cm-1.
  • Press enter, Display show:   Solu. Value     : 1330      1) μS  2) mS :
  • Press enter, Display shows:   Enter Soln. Cond. :  –  Enter solution actual conductivity.
  • For Cell K=0.1 enter 0.1 by using numerical key.
  • Display shows: Enter Cell Const: –
  • Select COND. mode then press CAL key.
  • Press [ 1 ] for Micro seimens unit.
  • Press enter, Display show:  Enter Coefficient: __     Press 2.0 to enter Coefficient.
  • Press enter, Display show: ATC at: 1>25°C   2>20°C
  • To select ATC temperature press [ 2 ].
  • Press enter, Display show:  Select TEMPO Mode:  1) Auto  2) manual     Select  [ 1 ] for Auto.
  • Press Enter, Display show: Wait  !  Stabilising…⇒ Enter if stable rdg. Con = xxxx
  • Press enter, Display show:Cell constant = n.xyz   Con= xxxx μS   No. xx  C      K    =  xxxx    * 20.0°C
  • After getting the actual cell constant feed it into the instrument, then check the conductivity of another two solution.
  • Record the observation as per given in Annexure I.
  • After completion of calibration rinse the electrode 2-3 times with distilled water, remove the excess water by soaking it with lint free tissue paper, keep the electrode and RTD sensor in purified water solution.
  • Fill the details of the calibration status in the label   pasted on the Instrument / Apparatus.
  • After completion of analysis make entry in respective logbook.
  • 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.
  • Forms and Records (Annexures)
  • CALIBRATION OF CONDUCTIVITY METER (LAB INDIA PICO) – Annexure I
  • Distribution
  • Master copy –  Quality Assurance
  • Controlled copies- Quality Assurance, Production, Quality Control.engineering

 

Annexure I

CALIBRATION OF CONDUCTIVITY METER (LAB INDIA PICO)

QUALITY   ASSURANCE   DEPARTMENT

INSTRUMENT CALIBRATION FORMAT  – CONDUCTIVITY METER – LABINDIA PICO

Location CALIBRATION   PROCEDURE NO. BA(II)QA419-00
Make LAB INDIA ISSUE DATE
Model  No. PICO Effective Date

CLEANLINESS OF EQUIPMENT / INSTRUMENT BEFORE CALIBRATION ______________

Standard Potassium Chloride:           B. No.______________        Make___________

 

S No. Wt of Standard Dilution Standard Value Observation Tolerance Status
1. 1330 µs cm-1. ± 2 % of Standard value.
2. 133 µs cm-1
3. 26.6 µs cm-1.

Opinion: Instrument is suitable / not suitable for use.

Next calibration Due On: __________________________

CALIBRATED  BY :                                        CHECKED   BY  :                                             QA   MANAGER:

DATE:                                                                  DATE:                                                                  DATE:

 

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