Xylem Oxi 1970i PORTABLE DISSOLVED OXYGEN METERS - Manual (Page 17)

Oxi 1970i Operation
17 ba75691e01 01/2007
4.2.2 Measuring the D. O. concentration
Note
When measuring the concentration of test samples with a salt content
of more than 1 g/l, a salinity correction is required. For this, you have to
measure and input the salinity of the measured medium first. This is de-
scribed in section 4.3.3 on page 27.
Switching the salt content correction on or off, see below.
To measure the D. O. concentration with and without salt content cor-
rection, proceed as follows:
Switching on/off the salt
content correction
Proceed as follows to switch on the salt content correction:
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 D. O. concentration in
mg/l appears on the display.
REL1
Sal
S pH
AR
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
9 2
°
C
TP
O
ARng
mg/ l
1 In the D. O. concentration measuring mode, switch on the salt
content correction with <
▲ > . The SAL display indicator ap-
pears on the display. The value that was entered is taken into
consideration during the measurement (see section 4.3.3).
2 Switch the salt content correction off with <
▼ >. The SAL dis-
play indicator is no longer displayed.
REL1
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 / mV
m cm S/
%
5
1 7 6
4 2
°
C
TP
O
ARng
mg/ l
Sal