Multi 197i Operation
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ba75339e04 07/2009
4.4.4 AutoRead AR (Drift control) and hold function
The AutoRead function (drift control) checks the stability of the mea-
surement signal. The stability has a considerable impact on the repro-
ducibility of the measured values. With the aid of the hold function the
measured value display is frozen.
Criteria With identical measurement conditions, the following criteria are valid
for the AutoRead function:
For D. O. measurements, use the AutoRead function and hold function
like this:
Measuring mode Reproducibility Response time
D. O. concentra-
tion
better than 0.05 mg/l > 10 seconds
Oxygen saturation
index
better than 0.6 % > 10 seconds
1 Call up the measuring mode with <M> and/or <▲> <▼> .
2 Activate the AutoRead function with <AUTO READ>. The cur-
rent measured value is frozen (hold function).
3 Start AutoRead with <RUN/ENTER>.
AR flashes until a stable measured value is reached. This mea-
sured value is transmitted to the interface.
4 If necessary, start the next AutoRead measurement with
<RUN/ENTER>.
5 To terminate the AutoRead function: Press the
<AUTO READ> key.
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