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1.4 Press the measure key. The WAIT annunciator will start
flashing.
This means the instrument is waiting for a stable reading.
The pH will track the pH value as sensed by the pH
electrode and the ATC/Temp probe. When the display
changes less than 0.01 pH in about 10 seconds the autolock
function will be activated. The WAIT annunciator will stop
flashing and stay off. The reading is then "locked" and will
not respond to further changes from the pH electrode and
ATC/Temp probe. The "locked" display is the pH value of
the sample at the displayed sample temperature.
If "
OvEr/Undr
" is displayed, the pH value measured is out
of the
“16.00/-2.00 pH “ range.
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
top 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.
