NKE STBD-PR, Руководство пользователя

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Any degradation of the optical windows (scratching, punching) will irreversibly damage the sensor.
5.4 TURBIDITY SENSOR
Seapoint turbidity sensor
After every use, thoroughly rinse the sensor with clear water.
If deposits such as biofilm or mud remain, clean the sensor with soapy water and wipe the head with a soft cloth
or a paper towel.
5.4.1 Adjustment
The adjustment of the turbidity sensor is performed in a black container using standard Formazine solutions.
It must be done under fluorescent or LED lighting.
Incandescent lamps emit large amounts of energy at the same wavelength that the sensor operates at, which
may interfere with the measurements
- The principle is identical to the adjustment in (§ 5.3).
The STBD-PR probe has 3 measurement ranges. Each of these ranges is linked to a measurement channel, as
described in the table below:
Turbidity range Channel
0 – 25 NTU 2
0 – 125 NTU 3
0 – 750 NTU 4
Automatic 5

Select the maximum resolution, i.e. 12 bits, for the turbidity channel (Channel 2).

Prepare two baths of upper and lower calibration for each range.
(Example: Preparation of 2 baths of 5 and 20 NTU for the range 0 to 25NTU = channel 2 )

Select the maximum resolution, i.e. 12 bits, for the turbidity channel (Channel 2).

High turbidity bath

Immerse the STBD-PR probe in a high turbidity medium.

Once the medium has become stable (homogenization of suspended particles), place the STBD-PR in
recording mode at a frequency of 3 seconds for 5 minutes.

Note the high turbidity reference value TX .

Low turbidity bath

Immerse the STBD-PR probe in a low turbidity medium.

Once the medium has become stable (homogenization of suspended particles), place the STBD-PR in
recording mode at a frequency of 3 seconds for 5 minutes.

Note the low turbidity reference value TY .

Read the STBD-PR once again and create a measurement file.

Display the Turbidity curve and record the raw value measured for each bath. This is the value in brackets
that follows the indication of Channel 2 (
raw value ).
-
X raw value of the high turbidity bath
- Y raw value of the low turbidity bath
Optical windows