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3. Conductivity Calibration
3.1 Calibration Procedure
1.
Switch the
901-C
on and select Conductivity plus Temperature mode
(section 2).
2.
Plug the Conductivity sensor into the
Cond / TDS
socket. If a k=10 or
k=0.1 sensor is being used, ensure that it has been correctly selected (see
section 8). The Temperature sensor is not required, as Automatic
Temperature Compensation for Conductivity is done via the Conductivity
Sensor.
3.
Rinse the Conductivity electrode in distilled water. Shake off as much water
as possible. Blot the outside of the electrode dry. DO NOT BLOT THE
ELECTRODE SURFACES.
4.
Zero Calibration
Allow the Conductivity sensor to dry in air.
When the reading has stabilised at or near Zero, press and hold the
for 1 second.
The
∗∗
will not be removed after a zero calibration.
5.
Standard Calibration
Allowable Conductivity standards are listed in the specifications in section
1.5, and should be selected according to your range of interest.
Place the electrode into a sample of Conductivity standard so that it is
immersed at least to the vent hole in the body.
DO NOT
place the electrode directly into the bottle of standard. Discard the
used sample of standard after use. It is advisable to use a narrow sample
vessel to minimise the use of standard solution.
When the reading has stabilised, press and hold the
key for 1 second
to calibrate.
The
∗∗
will now be replaced by a decimal point if calibration was successful.
6.
The
901-C
is now calibrated for Conductivity and is ready for use in this
mode.
Discard the used samples of standard.