JENCO 6173 Operation Manual - page 13
13
of the two calibration buffers. The instrument is now
dual point calibrated and ready for measurements.
After two point calibration, pressing and holding the
[MEA./EFF.] key for about 5 seconds will display the
new electrode efficiency.
pH MEASUREMENTS
The STAND and SLOPE annunciators must be on. This means that
the instrument is dual point calibrated and is ready for
measurements.
1. Measurement with ATC/Temp probe in the pH-AUTOLOCK mode.
1.1 Connect the pH electrode and ATC/Temp probe to the
connector of the instrument. The ATC annunciator will
be on.
1.2 Press the [MODE] key until the LCD indicates pH mode
and the AUTO annunciator is on.
1.3 Rinse the pH electrode and the ATC/Temp probe with
distilled water and immerse them in the sample to be
measured.
1.4 Press the [MEA./EFF.] key. The WAIT annunciator will
start flashing. This means the instrument is waiting
for a stable reading. The display 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.