Xylem Oxi 1970i PORTABLE DISSOLVED OXYGEN METERS - Manual (Page 19)

Oxi 1970i Operation
19 ba75691e01 01/2007
4.2.5 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:
Use the AutoRead function and hold function like this with the sensors
z Oxygen depth armature
z CellOx 325
z DurOx 325
Note
The special features of the self-stirring D. O. sensor StirrOx G can be
found in section 4.2.6 on page 20.
Measuring mode 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
1 Select the measuring mode with <M>.
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.
4 If necessary, start the next AutoRead measurement with
<RUN/ENTER>.
REL1
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
O
ARng
mg/ l
AR