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5. Temperature Calibration
A “ ∗ ” in place of the decimal point indicates that the Temperature
readout is not calibrated, or a past calibration has failed. The “ ∗ ” will be
removed once Temperature has been successfully calibrated.
5.1 Calibration
1. Switch the Aqua-pH on.
2. Select Temperature mode (see section 2).
3. Plug the Temperature sensor into the Temperature socket (this is the
6-pin plastic socket). If the Temperature sensor is not connected,
then the Aqua-pH will use manual temperature compensation. In this
case, refer to section 5.4 for details on setting manual temperature
compensation values.
4. 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.
5. When the reading has stabilised, press and hold the key for 2
seconds.
6. The reading from the sensor is now displayed on the top line, and the
value you are going to set is on the bottom line. For example…
Enter 25.0
o
c
Temp ↑↑ 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.
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