KROHNE OPTISENS AAS 2000 EN - Manual (Page 29)

SERVICE
6
29
OPTISENS AAS 2000
www.krohne.com 12/2008 • MA AAS 2000 R01 en
There are two different ways of cleaning a sensor: The sensor can either be cleaned as a master
or as a slave. Both options are described in the following instructions.
Cleaning the sensor as a master (sensor has its own relay)
• Select the sensor in the main menu by using ↑ or ↓.
• Press ^ for approximately five seconds to enter the sensor menu.
• Use ↑ or ↓ to select Cleaning Cleaning Cleaning Cleaning and press ^.
• In the Cleaning Cleaning Cleaning Cleaning submenu, select Cleaner Cleaner Cleaner Cleaner and set it to Flush Flush Flush Flush.
• Then specify the cleaning interval in minutes (Interval min Interval min Interval min Interval min) and the flush time in seconds
(Lenght sec Lenght sec Lenght sec Lenght sec).
• Specify the relay to be used according to the wiring inside the MAC 080 converter. For
example, if the solenoid is wired to relay #1, set Relay Relay Relay Relay to #1 #1 #1 #1 for flushing.
• For sensors configured as masters, Next time Next time Next time Next time displays the next time flush will be activated.
Pushing ^ will set it to current time and thus start cleaning.
• If needed, specify the extra freeze time in seconds (Freeze sec Freeze sec Freeze sec Freeze sec).
Cleaning the sensor as a slave (along with another sensor)
• Select the sensor in the main menu by using ↑ or ↓.
• Press ^ for approximately five seconds to enter the sensor menu.
• Use ↑ or ↓ to select Cleaning Cleaning Cleaning Cleaning and press ^.
• The parameters Cleaner Cleaner Cleaner Cleaner, Interval min Interval min Interval min Interval min and Lenght sec Lenght sec Lenght sec Lenght sec in the Cleaning Cleaning Cleaning Cleaning submenu are set for
the sensor being the master.
• Set Relay Relay Relay Relay to Along #1 Along #1 Along #1 Along #1 or Along #2 Along #2 Along #2 Along #2 depending on what relay the master sensor uses.
• If needed, specify the extra freeze time in seconds (Freeze sec Freeze sec Freeze sec Freeze sec).
6.1.2 Cleaning the flushing nozzle
If the flushing nozzle becomes plugged, it can usually be cleaned by backflushing it with clean
water.
Cleaning the flushing nozzle
• Before attempting to backflush, close the valve for the flush water source.
• Disconnect the sensor flushing hose from the solenoid valve.
• Place a 12 mm / 0.47" hose over the flush nozzle and carefully open the water valve.
i The pressure should clear the line of solids. If backflushing does not work initially, try
cleaning the three flushing nozzles with a needle. Try backflushing the nozzles again as
described above until clean water comes out at the solenoid valve end of the hose.
.book Page 29 Monday, December 15, 2008 12:43 PM