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1.5 For samples that are inherently unstable, the
instrument will not AUTOLOCK. In this case, use the pH
NON-AUTOLOCK mode for measurements.
2. Measurement with ATC/Temp probe in the pH NON-AUTOLOCK
mode.
2.1 Connect the pH electrode and the ATC/Temp probe to the
connector of the instrument. The ATC annunciator will
be on .
2.2 Press the [MODE] key for the LCD to indicate pH and
for the AUTO annunciator to be off.
2.3 Rinse the pH electrode and the ATC/Temp probe with
distilled water and immerse them in the sample to
measured.
2.4 Allow sufficient time for the display to stabilize.
The instrument will display the pH value of the sample
at the displayed sample temperature.
3. Measurement with manual temperature compensation in the
pH-AUTOLOCK mode.
3.1 Connect the pH electrode to the connector of the
instrument The MAN annunciator will be on.
3.2 Press the [MODE] key for the LCD to indicate pH and
for the AUTO annunciator to be on.
3.3 Rinse the pH electrode with distilled water and
immerse it in the sample to be measured. Set the
instrument to the temperature of the sample as in 2.2
of pH CALIBRATION section.
3.4 Press the [MEA/EFF.] key. The WAIT annunciator will
start to flash. This means that the instrument is
waiting for a stable reading. The display will track
the pH value as sensed by the pH electrode. When the
