Measuring The Ph Value - Inolab pH level 2 Instruction Manual

Operation
AutoRead AR
(Drift control)
88

4.2.1 Measuring the pH value

1 Perform the preparatory activities according to sec-
tion 4.2.
2 Immerse the pH electrode into the test sample.
m
3 Press the
play. The pH value appears on the display.
The AutoRead function (drift control) checks the stability of
the measurement signal. The stability has a considerable
effect on the reproducibility of the measured values.
For identical measurement conditions, the following criteria
apply:
l pH value: better than 0.02 (response time: > 30 s)
1 Call up the pH measuring mode by pressing
2 Activate the AutoRead function by pressing
The current measured value is frozen (Hold function).
3 Start the AutoRead function by pressing
AR flashes on the display until a stable measured val-
ue is reached.
This measured value is transmitted to the interface.
4 If necessary, start the next AutoRead measurement
by pressing
5 To cancel the AutoRead function: Press the
key until pH appears in the status dis-
g
.
m
.
a
.
g
.
a
key.