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7. Temperature Calibration
7.1 Calibration Procedure
1. Plug the Conductivity/Temperature sensor into the
Conductivity
socket. A separate temperature sensor can also be used in place of
the Conductivity sensor for temperature value.
2. Switch the meter on.
3. 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.
4. Select Temperature Calibration. (
F1:Cal.
F3:Temp
)
5. 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.
6. 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.
7. Press the
key to calibrate the temperature value.
The
“
” will now be replaced by a decimal point, if calibration was
successful.
Alternatively, press the
key to abort temperature calibration.
7.2 Calibration Notes
1. Temperature calibration information is retained in memory when the
WP-81
is switched off, even when the battery is removed. This
information can be recalled or printed later using the GLP function (see
section 8).
2. Temperature does not need to be re-calibrated unless the sensor is
replaced or the meter is initialised.