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3.2 Conductivity Calibration
1.
Plug the Conductivity/Salinity sensor into the
Sensor
socket.
If a k=0.1 or k=10 sensor is being used, ensure that the
WP-84
is set to the
correct k factor before using the instrument (see section 13).
2.
Select Conductivity Mode, as per section 3.1.
3.
Rinse the Conductivity/Salinity sensor in distilled water. Shake off as much
water as possible. Blot the outside of the sensor dry
. DO NOT BLOT THE
SENSOR WIRES.
4.
Zero Calibration
Let the sensor dry in air.
Select Conductivity Calibration
(
→
→
F1:Cal.
→
→
F1:Conductivity
).
5.
When the reading has stabilised at or near zero, press the
key to calibrate.
The
∗
will not be removed after a zero calibration.
6.
Standard Calibration
Allowable Conductivity standards are 150uS/cm, 1413uS/cm, 2.76mS/cm,
12.88mS/cm and 58.0mS/cm, and should be selected according to your range
of interest.
If the
WP-84
does not recognise the standard, it will display the message “
NOT
STD
” during calibration. Calibration will fail if this message is displayed.
Place the sensor into a sample of Conductivity standard, so that it is
immersed at least to the vent hole in the white plastic cover. The white
plastic cover MUST be in place for correct readings.
DO NOT
place the sensor 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.
7.
Select Conductivity Calibration.
(
→
→
F1:Cal.
→
→
F1:Conductivity
).
8.
When the reading has stabilised, press the
key to calibrate.
Alternatively, press
to quit and retain the current calibration settings.
The
∗
will now be replaced by a decimal point, if calibration was successful.
9.
The
WP-84
is now calibrated for Conductivity and is ready for use in this
mode.