
Operation pH/ 3400i
36
4.4.4 AutoRead AR (Drift control)
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.
Criteria With identical measurement conditions, the following applies:
1 Call up the measuring mode with <M> and/or <▲> <▼> .
2 Activate the AutoRead function with <AR>. The current mea-
sured 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 <AR> key.
RCL
cm
cm
M
m
S/
%
/pH
mV
pH
U
TDS
Tref20
Cal
8
S
1
Sal
1/
cm
Sal
AutoCal DIN
Lin
Tref25
nLF
AutoCal TEC
Auto
Store
LoBat
AR
Time
Baud
Day.Month No.
Ident
Year
mbar
°
F
/
K
%
6
7
1
9
2
°
C
TP
7
O
mg/l
ARng
Measured
parameter
Reproducibility Response time
D. O. concentra-
tion
better than 0.05 mg/l > 10 seconds
D. O. saturation
index
better than 0.6 % > 10 seconds
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