KROHNE OPTISENS OAS 2000 EN - Manual (Page 21)

INSTALLATION
3
21
OPTISENS OAS 2000
www.krohne.com 07/2010 - MA OAS 2000 R02 en
Mounting to MAA 2000 slide rail immersion holder
• Mount the slide rail immersion holder to the side wall of the basin or open channel using the
two predrilled holes. The adjustable stop should be on the bottom and the two sliding clamps
above.
• Take the two sliding clamps off from the slide rail and mount them around the sensor housing.
Make sure that the clamps are placed on the two elevated ends of the sensor housing (one on
the upper part and one on the lower part, see figure above).
The two guide tracks have to line-up in one straight line to each other.
• Slide the sensor with the two clamps into the slide rail. Make sure that the guide tracks of the
two clamps are properly seated.
• Adjust the sensor position as necessary and fasten the adjustable stop.
3.5 Installation of flushing
The sensor is equipped with built-in flushing nozzles. The nozzles are used to direct the cleaning
medium (compressed air or water) via a flushing hose that is connected to the top of the sensor
housing. A solenoid valve that is wired to a relay in the converter controls the air or liquid (see
converter manual).
Compressed air is recommended for most applications.
CAUTION!
In order to avoid large air bubbles which can affect the measurement please make sure that the
slide rail immersion holder is mounted in a certain angle to the vertical position. The angle
should be slightly off from vertical position (approx. 20°), but not more than 90°.
CAUTION!
For the submersible sensor the highest allowed flushing pressure is 6 bar / 87 psi. When using
air, 2 bar / 29 psi is usually sufficient.
CAUTION!
For the inline sensor the highest allowed flushing pressure is 8 bar / 116 psi. Inline sensors
require a flushing pressure at least 2 bars / 29 psi above the process pressure.
INFORMATION!
Pay attention to the requirements for protection against backflow, according to the
EN 1717 standard for drinking water devices. If possible, use plant reuse water or effluent water
for cleaning.
.book Page 21 Friday, July 2, 2010 1:49 PM