Xylem MULTI 1970I PORTABLE MULTIPARAMETER METERS - Manual (Page 33)

Multi 1970i Operation
31
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.
Sal
S pH
1
LoBat nLF Lin Oxi
Tref25 Tref20
Cal TEC
Auto Store
8
Time
Year Ident
No. Day.Month
Baud Sal cm 1/
K / %
RCL
REL2
pH / mV
m cm S/
%
7
1 7 6
0 8
°
C
TP
REL1
O
ARng
mg/ l
AR