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Display - Error message
Large measurement value
fluctuations
7. Returns
All devices which are sent back to the manufacturer must be free from measurement
substance remains and other harmful substances. Measurement substance remains
on the housing or on the sensor can endanger persons or the environment.
Use suitable transport packaging for the return of the device, especially if it is still a function-
ing device. Make sure that the device is protected with sufficient insulating material in the
packaging.
8. Disposal
Drop off the depleted batteries at a collection centre designated for this purpose.
The device may not be disposed of with the household waste. If the device should be disposed
of, send it directly to us (with sufficient postage paid). We will dispose of the device properly
and in an environmentally friendly manner.
9. Technical data
Sensor
Oxygen, dissolved
- Measurement range
- Precision
- Resolution
Temperature
- Measurement range
- Precision
- Resolution
Sensor membrane
Dimensions
Device
Sensor
Power supply
SD_400 Oxi L_2 04/2019
Possible cause
a) Temperature fluctuations
b) Sensor cap dirty or de-
fective
c) Sensor not sufficiently im-
mersed in the sample
d) Sensor damaged
e) External electronic fault
f) Storage flask not removed
Optical (measurement of the luminescence life)
0 – 50 mg/l or 0 – 500 % air saturation
0 – 20 mg/l or 0 – 200 %: ± 1 % of meas. or
±0.1 mg/l (higher value applies)
>200 % or >20 mg/l: ± 10 % of meas.
0.1 %, 0.01 mg/l
-5 – 50 °C (storage and operating temperature)
± 0.2 %
0.1 °C
Plastic
approx. 162 x 97 x 50 mm (L x W x H)
approx. 287 mm length, ø 33 mm incl. storage
flask
4 x AA Alkaline or 5 VDC Micro USB
Measure
a) Keep temperature con-
stant
b) Clean or replace sensor
membrane
c) Immerse sensor sufficiently
deep in the sample (at least
3 cm)
d) Replace sensor
e) Switch off or remove ex-
ternal sources of interference
f) Remove storage flask
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