wtw Oxi 197i, Operating Manual

Page: 18 / 63

Operation Oxi 197i
18
4.2.3 Measuring the D. O. saturation
You can measure the D. O. saturation as follows:
4.2.4 Automatic selection of the measuring range, AutoRange
Sensors You can use the sensors listed in section 1.3 on page 8. The sensor
type is automatically recognized and the resolution is adjusted if nec-
essary (see chapter 7 T
ECHNICAL DATA
).
AutoRange Two measuring ranges are available for each measuring mode. If a
measuring range is exceeded, AutoRange causes the measuring in-
strument to change automatically to the next higher measuring range
and back again. Therefore, the instrument always measures in the
measuring range with the highest possible resolution.
To switch the automatic measurement range selection on/off, see
section 4.6 C
ONFIGURATION
. When the AutoRange function is switched
on, ARng appears on the display.
1 Perform the preparatory activities according to section 4.2.1
2 Immerse the D. O. sensor in the test sample.
3 Press the <M> key repeatedly until the saturation in % appears
on the display.
Sal
REL1
mg/ l
/ mV
m Sal
S pH
AR
1
LoBat nLF Lin Oxi
Tref25 Tref20
Cal TEC
Auto Store
8
Time
Year Ident
No. Day.Month
Baud
cm 1/
K /
%
RCL
REL2
pH
cm
S/
8
1 7 6
9 2
°
C
TP
O
ARng
%
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