KROHNE OPTISYS SLM 2100 EN - Manual (Page 54)

5
OPERATION
54
OPTISYS SLM 2100
www.krohne.com 03/2014 - 4002737302 - MA OPTISYS SLM 2100 R02 en
5.7.7 Timer / start signal
If there is no danger for the sensor or cable to be caught by moving devices (i.e. installation in
thickeners without stirrers) an alternative sampling mode controlled by the build-in timer can be
set.
• To enable the timer, the start signal has to be set to Timer. This can be done in the submenu
C1.5 start signal.
• After that the timer interval in minutes can be selected in the submenu C1.6 timer interval.
For further information please refer to refer to Function tables on page 45.
5.7.8 Extended settings
Before start of the operation a few important entries have to be made at the measuring
device.For further information refer to
Definition of positions and zones on page 51. These
settings will also automatically scale the 4...20 mA outputs. Execute the following steps before
starting the first measurement:
First step: Change the working mode
• Change the measuring function to manual operation and lower the sensor by using the arrow
keys.
Second step: Find out the distances
• Lower the sensor head 0.3 m / 1 ft below the liquid surface and note the level as the blind
zone. Lower the sensor further until it reaches the bottom of the tank. (You can identify this
point by watching the cable got slack.) Pull up the sensor until you have about 5 cm / 2" of
clearance between the bottom of the clarifiers and the sensor. Note the level as the maximum
depth.
Third step: Entering the distances
• Select the menu “Extended settings” and enter both values.
• Optionally you can go to the option Rake height and enter the rake height
rake height rake height rake height to the menu.
DANGER!
To avoid damages or destructions, use a limit switch in all applications where a rake or other
moving devices may come in contact with the sensor or cable! The manufacturer does not
assume any responsibility for damages caused by the absence or malfunction of the rake guard
limit switch.
.book Page 54 Wednesday, April 30, 2014 1:39 PM