Kärcher HDS Middle series Service Manual page 29

HDS Middle Range / HDS Premium Range
2.8 Scale inhibitor
2
Top RFID unit with read-write electronics
3
2
RFID read-write electronics
4
RFID tag, underneath the label
Service Manual 04.2008
How the RFID works
RFID (Radio Frequency Identification) means
1
identification with the help of high frequency.
Underneath the label (4) on the scale inhibitor
bottle there is a transponder (microchip with
antenna, also called a tag) (5).
The read-write electronics (2) integrated in the
top RFID unit (1) can read out data from the tag
and can also write data on the tag. The tag draws
its power supply from the high-frequency field of
the read-write electronics (2). The data is
transferred due to changes in the field intensity.
The read-write electronics (2) queries the type
of care product and stores the metered units on
the tag (5).
When the bottle is empty (after 3000 units) or the
level switch in the scale inhibitor container signals
empty, an after-running time of 5 hours is started.
This after-running time is counted on the tag.
If the after-running time has expired or if the empty
bottle is removed, the burner is switched off.
If a bottle has been detected as being empty it is
electronically blocked and can no longer be used.
A new original scale inhibitor bottle must therefore
always be used.
5
1 Top RFID unit
2 Read-write electronics
3 Antenna, read-write electronics
4 Label, scale inhibitor bottle
5 RFID tag, underneath the label
Unit Function
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