S
S
4
4
2
2
3
3
/
/
C
C
/
/
O
O
P
P
T
T
O
O
p
p
t
t
i
i
c
c
a
a
l
l
O
O
x
x
y
y
g
g
e
e
n
n
P
P
r
r
o
o
b
b
e
e
D
D
a
a
t
t
a
a
S
S
h
h
e
e
e
e
t
t
S423/C/OPT Optical oxygen probe – Data Sheet
13
ENTER
Calibration of the sensor
This program step allows the calibration of the oxygen sensor.
The calibration must necessarily be carried out:
−
Every time the sensor cap 9400410134 or 9400410135 is replaced
−
When starting after a long period of non-use
−
Whenever discrepancies occur, according to a known value
For proper operation it is necessary, in addition to the cases mentioned
above, to verify calibration or recalibrate the probe periodically.
The frequency of this operation will be determined by the user, taking into
account the type of application and the type of electrode used.
NOTE
To perform a calibration in oxygen saturated solution immerse the
probe in a container of clean water and wait 10 minutes for stabilization.
Then continue with the Auto Calibration of the sensor
Wait for the values (O
2
and °C) to stabilize, then press ENTER; if the
procedure is successful the display will show "Calibration OK”
If ”Faulty Probe” is displayed, we recommend:
−
To check the removable protection cap
−
To assure the integrity of the membrane placed on the top of the
probe
−
To check the cable integrity, the correct connection to the instrument
and on the probe.
Automatic Calibration
Press ENTER
pO2 : 21.96%
Temp: 29.3°C
