5. Operation
5.1 Display elements
When the instrument is switched on, it initialises. The serial number of the connected sensor
appears in the display during this process. For this purpose, the sensor must be connected
and the SD card must be inserted. Then the instrument is in measurement mode and the
following display appears:
A
O
N
M
L
H
K
I
System settings for display A,B,C,E,H and J
J
Performance of the single-point calibration or calibration settings
K
Call-up of stored measurement data
L
Saved measurement values
M
Auto Power-Off: P0: permanently on; P1: 10 minutes after the last button is pressed
N
An hourglass indicates that the calibration is in progress
O
Oxygen measurement, dissolved
5.2 Controls
6 Sensor maintenance
6.1 Cleaning
Cleaning the sensor after each use extends the service life of the sensor membrane.
1. The sensor must be rinsed off with distilled water after each use. No aggressive solutions
or alcohols may be used.
SD_400 Oxi L_4 07/2020
B
C
D
E
F
G
J
I
On/Off switch, Light On/Off
Confirmation of the entry (ENTER), press and hold: End
measurement/calibration process
In configuration mode or in calibration mode: Adjust
display/values (INCREASE/DECREASE)
Cursor movement through the menu or through
configuration mode (RIGHT/LEFT)
A
Date
B
Time
C
Salinity correction On/Off
D
Battery status
E
Temperature display in °C or °F
F
Oxygen saturation in %
G
Display of the pressure value
H
Display of the oxygen value in mg/l
or ppm
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