wtw pH 3300i Operating Manual page 16

Operation
AutoRead
(drift control)
16
The AutoRead function (drift control) checks the stability of the measurement
signal. The stability has a considerable impact on the reproducibility of the
measured values.
For identical measurement conditions, the following criteria apply:
Reproducibility
Better than 0.02
1 Call up the pH measuring mode with <M> and <▲> <▼> .
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).
3 Start AutoRead with <RUN/ENTER>.
AR flashes until a stable measured value is reached.
This measured value is transmitted to the interface.
4 If necessary, start the next AutoRead measurement with <RUN/EN-
TER>.
5 To terminate the AutoRead function: Press the <AR> key.
Note
The current AutoRead measurement can be terminated at any time (accept-
ing the current value) by pressing <RUN/ENTER>.
Response time
> 30 seconds
pH 3300i/3400i
ba75682e02 03/2008