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5. Temperature Calibration
5.1 Calibration Procedure
1.
Plug the Conductivity/Temperature sensor into the
Sensor
socket.
2.
Place the sensor into a beaker of room temperature water, alongside a good
quality mercury thermometer. Stir the sensor and the thermometer gently to
ensure an even temperature throughout the beaker.
3.
Select Temperature Calibration (
→
→
F1:Cal.
→
→
F3:Temp
).
4.
The reading from the sensor is now displayed on the right of the display, and
the value you are going to set is shown on the left. For example…
→
→
25.0
←
←
20*0
o
c
↑↑↓↓
:Set F1:Cal.
5.
When the reading on the right has stabilised, press the
and
keys until
the reading on the left shows the same temperature as the mercury
thermometer.
6.
Press the
key to calibrate the temperature readout.
Alternatively, press
to quit and retain the current calibration settings.
The
∗
will now be replaced by a decimal point, if calibration was successful.
Alternatively, press the
key to abort temperature calibration.
5.2 Calibration Notes
1.
Temperature calibration information is retained in memory when the
WP-84
is
switched off, even when the battery is removed. This information can be
recalled or printed later using the GLP function (see section 7).
2.
Temperature does not need to be re-calibrated unless the sensor is replaced or
the meter is initialised.
5.3 Calibration Messages
1.
If a temperature calibration has been successfully performed, the
WP-84
will
display the following message and the offset value of the sensor.
Calibrate OK
Offset= 1.0
o
c
2.
If a temperature calibration has failed, the
WP-84
will display the following
message and the failed offset value of the sensor.
Calibrate Failed