- 10 -
customer-defined calibration solution.
4.4 Sample test
1) Rinse pH electrode in distilled water, dry it, and dip it in sample solution. Stir the solution gently and let
it stand still in the sample solution until the stable value and icon appears on LCD, get the reading
which is pH value of sample solution, please refer to Diagram-12 for calibration and measurement
process of pH meter.
Diagram – 12 Calibration and measurement process of pH meter
2) pH measurement of pure water
The meter is able to set up pH measurement mode of pure water with
temperature compensation for pH value from parameter setup P1.5
(please see Item 8.3). “
PU-1
” icon displays at the right top of LCD, please
refer to Diagram – 13.
3) pH measurement of pure water mixed with ammonia
The meter is able to set up pH measurement mode of pure water mixed with
ammonia with temperature compensation for pH value from parameter setup
P1.6 (please see Item 8.3). “
PU-2
” icon displays at the right top of LCD,
please refer to Diagram – 14.
Note: In parameter setup, either “PU-1” or “PU-2” measurement mode
can be selected, but both can not work at the same time.
4) Self-diagnosis information
During the process of calibration and measurement, the meter has self-diagnosis functions, indicating the
relative information as below, please refer to chart – 6.
Diagram - 13
Diagram - 14
Press to turn
on the meter.
Press key to
enter into the
calibration mode.
Submerge the
electrode in pH7.00
solution, press
key when icon
appears.
After the 1
st
point
calibration is done,
press key to
enter into the
measurement mode.
Sample
Test
1
st
point
calibration
2
n d
point
calibration
3
r d
point
calibration
After the 2
nd
point
calibration is done,
press key to
enter into the
measurement mode.
After the 3
rd
point
calibration is done,
the meter enters into
the measurement
mode automatically.
Submerge the
electrode in pH4.00
solution, press
key when icon
appears.
Submerge the
electrode in
pH10.01
solution,press
key when icon
appears.
