10
Press key to enter
into the calibration
mode.
Notes:
（
a
）
For manual temperature compensation (temperature probe didn`t plug in RCA socket), when
press key, the temperature value flashes. Press key or key to adjust the temperature
value, and then press key, pH measuring value flashes.
(b) The meter can perform 1-2 points customer-defined calibration. When the 1
st
point calibration is
done, the meter goes to measurement mode automatically. Likewise in customer-defined 2
nd
point
calibration.
(c) The value set in
“Customer-defined” is at a fixed temperature. The meter is suggested to perform
calibration and measurement at the same temperature to avoid large error. The meter cannot
recognize customer-defined calibration solution.
4.5. Sample Test
4.5.1. Rinse pH electrode in pure water, allow it to dry, and submerge it in sample solution. Stir the solution
briefly and allow it to stay 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-11 for calibration and measurement
process of pH meter.
Diagram
– 11 Calibration and measurement process of pH meter
4.5.2. 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.
Submerge the electrode
in pH4.00 solution, press
key when icon
appears.
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.
1
st
point calibration is
done, meter goes into
measurement mode.
1
st
point calibration
Sample
Test
2
n d
point
calibration
3
r d
point calibration
2
nd
point calibration is
done, meter goes into
measurement mode.
3
rd
point calibration is
done, meter goes into
measurement mode
Submerge the electrode
in pH10.01solution,press
key when icon
appears.
Press key to enter
into the calibration
mode.
