wtw Oxi 1970i Mode D'emploi page 22

Calibration procedure
pH S mV /
C A L
1
O % mg/l
S/
m
Sal
1/ cm
Time Baud 1 1 7 6
C
°
Day.Month No.
%
Year Ident
Tref25 Tref20 Auto Store REL1
LoBat nLF Lin Oxi Cal TEC ARng AR
pH S mV /
1 0 8 8
% mg/l
O
S/
m
Sal
1/ cm
Time Baud 1 1 7 6
C
°
Day.Month No.
%
Year Ident
Tref25 Tref20 Auto Store REL1
LoBat nLF Lin Oxi Cal TEC ARng AR
pH S mV
1 F A C
O % mg/l
S/
m
Sal
1/ cm
Time Baud 1 1 7 6
C
°
Day.Month No.
%
Year Ident
Tref25 Tref20 Auto Store REL1
LoBat nLF Lin Oxi Cal TEC ARng
pH S mV
1 4 4 2
% mg/l
O
S/
m
Sal
1/
cm
Time Baud 1 0 0 7
C
°
Day.Month No.
%
Year Ident
Tref25 Tref20 Auto Store REL1
LoBat nLF Lin Oxi Cal TEC ARng AR
22
Procedure for calibrating with the air calibration vessel OxiCal®-SL:
Keep the OxiCal
Connect the D. O. sensor to the measuring instrument.
Put the D. O. sensor into the air calibration vessel.
Press the <CAL> key repeatedly until O
pH
cm
Sal
/
K
TP
REL2
RCL
Press <RUN/ENTER>. The AutoRead measurement begins.
The value of the relative slope of the sensor is displayed.
As soon as the measured value is stable, the instrument displays the
pH
sensor evaluation.
cm
Switch to the measuring mode with <M>.
Sal
/ K
TP
REL2
RCL
Procedure for calibrating via a comparison measurement:
Connect the D. O. sensor to the measuring instrument.
Press the <CAL> key repeatedly until O
/ pH
Immerse the oxygen sensor in the calibrating solution.
cm
Sal
/
K
TP
REL2
AR RCL
Press <RUN/ENTER>. The AutoRead measurement begins.
If the measured value is stable, the instrument displays the determined
/ pH
measured value and the correction factor of the relative slope (initial
cm
value = 1.000).
Sal
Remove the oxygen sensor from the calibrating solution.
/ K
TP
REL2
RCL Perform a comparison measurement (determine the nominal value).
Leave the measuring instrument switched on until the nominal value is
determined.
Set the displayed value on the measuring instrument to the nominal
value with <▲> <▼>. This changes the related correction factor of the
relative slope.
Switch to the measuring mode with <M>.
Note
If the correction factor deviates from 1.000, the display of the measured value
units flashes.
®
-SL air calibration vessel ready.
CAL appears.
2
FAC appears.
2
Oxi 1970i