1.0 OBJECTIVE:
To
lay down the operating procedure of Conductivity meter.
2.0 SCOPE:
This
shall be applicable to the Conductivity
meter of Quality Control Instrument Laboratory.
3.0 RESPONSIBILITY:
3.1
Technical
Assistant/ Helper.
3.2
Q.C Analyst.
4.0 ACCOUNTABILITY:
4.1
Manager-Quality
Control.
5.0 MATERIAL AND
EQUIPMENT:
5.1
Conductivity meter.
6.0 PROCEDURE:
6.1
Switch on the main
supply and press the ON/OFF button of the conductivity meter to switch on the
meter and switch off the meter.
6.2
For automatic
temperature compensation (ATC). Simply attach the conductivity/ TDS electrode
to the meter ensure that the ATC mode has been selected in the setup menu the
ATC indicator will light on the LCD.
6.3
Note:
6.3.1
If the
conductivity/ TDS electrode is not properly attached to the meter or it has
been damaged, the ATC indicator will blink and the temperature display will
show “Ur”.
6.4
Rinse the
electrode with distilled water before use or remove any impurities adhering to
the electrode body. Shake or air dry. To avoid contamination or dilution of
your sample rinse the electrode with the small volume of your sample.
6.5
Press ON to switch
on meter.
6.6
Dip the electrode
into the sample.
6.7 When
dipping the electrode into the sample, take care to ensure that the liquid
level is above its upper steel band. Stir the electrode gently in the sample to
create a homogeneous sample.
6.8 Allow
time for the reading to stabilize. Note the reading on the display.
6.9 Electrode care and
maintenance:
6.9.1
Keep the
conductivity electrode clean, the electrode twice and gently swirl it while you
take readings. For best accuracy soak a dry electrode for at least 5 to 10
minutes.
6.9.2
Never scratch the
bands with a hard substance.
6.9.3
Do not strike the
electrode against any hard surface.
6.9.4
Do not immerse the
electrode in oily substance.
6.9.5
Clean the
electrode thoroughly stirring it in a mild detergent or isopropyl alcohol.
6.9.6
Wipe the electrode
with soft tissue paper clean the electrode with tap water and recalibrate
before use.
7.0 REVISION LOG:
|
Revision No.
|
Effective Date
|
Reason
|
|
00
|
|
New
SOP
|
8.0 REFERENCES:
8.1
Not Applicable.
9.0 ANNEXURES:
9.1
Not Applicable.
10.0
ABBREVIATIONS:
|
Abbreviation
|
Expanded Form
|
|
SOP
|
Standard operating
procedure
|
|
&
|
And
|
|
No.
|
Number
|
|
Ltd.
|
Limited
|
|
Q.C
|
Quality control
|
|
QCEO
|
Quality control
equipment operation
|
|
F
|
Format
|
|
ATC
|
Automatic temperature
compensation
|
|
LCD
|
Liquid crystal display
|
|
TDS
|
Total dissolved solids
|
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