LaMotte 5 Series pH Meter - Manual (Page 14)

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4. Press INC key until the display shows the desired temperature.
The meter will allow an adjustable maximum value of ±5 °C
from the factory default.
5. To cancel or abort this operation, press the CAL key. To confi rm
the calibration, press the ENTER key. A new value will be
stored in the meter non-volatile memory. The meter will display
“CO” momentarily, and then revert to the measurement mode.
3.2.2 Without Temperature Probe (no ATC)
If a temperature probe is not used, the meter will compensate the pH
response based on a temperature value that has been manually set or at
the factory default of 25.0 °C.
1. Press the MODE key until “°C” shows on the DISPLAY.
2. Compare the displayed value to a NIST certifi ed thermometer or
thermometer that is known to be accurate (dipped into a constant
temperature bath).
3. Press the CAL key to enter the temperature calibration mode.
The DISPLAY will show “CA” momentarily and the displayed
reading will fl ash. Note that the displayed value should be either
25.0 °C or the last set temperature value.
4. Press the INC key until the displays shows the desired
temperature. The value can be set from 0 to 100 °C.
5. To cancel or abort this operation, press the CAL key. To confi rm
the calibration, press the ENTER key. A new value will be
stored in the meter non-volatile memory. The DISPLAY will
display “CO” momentarily, and the meter will revert to the
measurement mode.