Operating the bbe BenthoTorch
bbe BenthoTorch Manual Page 29
Reflectance calibration procedures
The reflectance has to be calibrated by using plates with a defined level of reflectance. This calibration is
performed using a black, a grey and a white calibration plate. The measurement of the black plate is the offset
measurement, described above.
Please note:
The grey and the white plate are made for reflectance measurements only.
For the calibration procedures using the calibration plates, please remove the red foam from the BethoTorch.
1. Put the BenthoTorch on the grey calibration without water.
2. Got to calibration -> background -> gray
CALIBRATION:
< Background >
OK <- -> ESC
SET BACKGROUND:
< grey >
OK <- -> ESC
3. Touch the OK key to start.
0: 1000 1:5000
2: 6000 3:7000
confirm ESC
4. After the measurement the results are shown, please confirm it.
SET
BACKGROUND:v
< grey >
OK <- -> ESC
5. After confirming the background calibration is marked.
6. Repeat with the white plate
Fingerprint calibration procedures
To calibrate the fingerprints of the algae classes 2 concentration for each algae class are required. A low
concentration and a high concentration.
Recommendations:
Low concentration: about 1 µg/cm²
High concentration: about 6 µg/cm²
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