KROHNE OPTISENS OAM 2080 EN - Manual (Page 29)

OPERATION
5
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OPTISENS OAM 2080
www.krohne.com 08/2010 - MA OPTISENS OAM 2080 R01 en
In the previous drawing the expansion of the sludge blanket is 0.3 m / 1 ft and of the fluff layer it
is 0.9 m / 3 ft.
5.8 Timer interval (optional)
To protect the sensor and the cable from damages or destruction by rakes or other moving
parts, a rake guard limit switch can control the measuring cycle ( on page 20).
If there is no danger for the sensor or cable to be caught by moving devices (i.e. installation in
thickeners without stirrers), you can set an alternative sampling mode controlled by the build-in
timer. In this case you have execute the following steps to select the trigger relay in the
converter and set the time interval in minutes:
Example of a typical sludge profile
1 Immersion depth of the sensor in centimetres
2 Consistency in mg/l
3 Time axis
4 Level measurement curve
5 Consistency curve
6 Sludge layer curve
7 Fluff layer curve
.book Page 29 Friday, August 20, 2010 1:07 PM