Operation
inoLab pH/ION 735
24
Preparatory activities
Perform the following preparatory activities when you want to measure:
4.4.2
Measuring the pH value
AutoRead
(Drift control)
The AutoRead function (drift control) continually checks the stability of
the measurement signal. The stability has a considerable impact on the
reproducibility of measured values. The display of the measured pa-
rameter flashes until a stable measured value is available.
Criteria
With identical measurement conditions, the following applies:
1
Connect a pH or ORP electrode to the meter.
The pH/ISE measuring window is displayed.
2
If necessary, select the pH or mV display with
m
.
3
Adjust the temperature of the solutions and measure the cur-
rent temperature if the measurement is made without a temper-
ature sensor.
4
Calibrate or check the meter with the electrode.
1
Perform the preparatory activities according to section 4.4.1.
2
Immerse the pH electrode in the test sample.
3
Select the pH or mV display with
m
.
pH
6.949
24.8
°C
20.09.04 10:37
Measured param-
eter
Reproducibility
Response time
pH value
Better than 0.01
> 30 seconds
