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6. Temperature Calibration
The temperature readout must be calibrated or manually set before attempting pH
calibration. The decimal point is replaced by a
∗
if the reading is not calibrated.
6.1 Temperature Calibration
1.
Press the
key if the meter is not already switched on.
2.
Press the
key until the meter is in Temperature mode.
3.
Plug the Conductivity sensor into the
Cond
socket.
4.
Place the probe 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. The temperature sensor is
inside the stainless tip of the sensor, but better temperature response is
achieved by immersing the sensor to at least the level of the vent hole in the
white plastic cover.
5.
When the reading has stabilised, press and hold the
key for 2 seconds.
6.
The reading from the probe is now displayed on the top line, and the value
you are going to set is on the bottom line.
eg:
25
∗∗
0
o
C
↑↑
26.0
↓↓
7.
Press the
and
keys until the bottom line shows the same temperature
as the mercury thermometer.
8.
Press the
key to calibrate the temperature readout.
Alternatively, press the
key to abort temperature calibration.
6.2 Calibration Notes
1.
Temperature calibration information is stored in memory when the meter is
switched off, even if the battery is removed.
2.
Temperature does not need to be re-calibrated unless the Conductivity sensor
is replaced or the meter is initialised.