LaMotte pH PLUS Direct Meter - Manual (Page 18)

5. To cancel or abort this operation, press the
CAL key. Note no new value
will be stored into the meter's non-volatile memory. To confirm the
calibration, press the
ENTER key. The LCD displays “CO” momentarily,
and the meter reverts to the measurement mode.
3.4.2 Without Temperature probe (no ATC)
If a temperature probe is not used, the meter compensates for the pH response
based on a new calibrated temperature value manually set or at 25.0 °C
(factory default).
1. Press the
MODE key to enter into Temperature mode until “°C” shows on
the LCD.
2. Compare the displayed value to a NIST certified thermometer or
thermometer known to be accurate (dipped into a constant temperature
bath).
3. Press the
CAL key to enter the temperature calibration mode. The LCD
shows “
CA” momentarily and the displayed reading flashes. Note that this
displayed value should either be 25.0
o
C or the last set temperature value.
4. Press
p and q keys until the display shows the desired temperature. Any
value from 0 to 100 o C can be set.
5. To cancel or abort this operation, press the
CAL key. Note no new value
will be stored into the meter‘s non-volatile memory. To confirm the
calibration, press the
ENTER key. The LCD displays “CO” momentarily,
and the meter reverts to measurement mode.
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