Operation, 2 definition of positions and zones – KROHNE OPTISENS OAM 2080 EN User Manual

Page 24

OPERATION

OPTISENS OAM 2080

www.krohne.com

08/2010 - MA OPTISENS OAM 2080 R01 en

5.3.2 Definition of positions and zones

1 Home position:

Home position:

Home position: the sensor will always return to this position, which is in the flushing tube.

2 Blind zone:

Blind zone:

Blind zone: if the sensor detects sludge or foam in this zone during lowering, the meter does not register this detection.

You can prevent unwanted measurement by setting this zone to be 0.3 m / 1 ft below the normal liquid surface.

3 Maximum immersion depth:

Maximum immersion depth:

Maximum immersion depth: this is the maximum distance from the home position. The sensor will stop at this depth
if it detects no sludge. Note: the sensor might stop and return at a shorter distance if a possibly existing limit switch
interrupts the sampling process!

4 Measuring zone:

Measuring zone:

Measuring zone: in this zone the sensor delivers measuring results and the output signal varies from 4...20 mA.

5 Fluff layer:

Fluff layer:

Fluff layer: defined by the preset sludge concentration.

6 Sludge blanket:

Sludge blanket:

Sludge blanket: defined by the reset sludge concentration.

7 Bottom rake zone:

Bottom rake zone:

Bottom rake zone: here a possibly existing bottom rake operates. The top of this zone is the height where the sensor
always has to stop during lowering to avoid hitting the bottom rake.

8 Bottom rake

Bottom rake

.book Page 24 Friday, August 20, 2010 1:07 PM