Haug 01.7924, Operating Instructions Manual

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5 Operate
16
5.2.2 Monitoring the HV
A minimum of 4.2 kV is required for proper ionisation. The threshold
set in the discharging power pack is 4.2 V. If the value is less, the
“Reset” light flashes.
In order to monitor the HV, the signal line K1 UL must be connected
to pin 3 and 5 of the K1 signal socket.
The monitor voltage (UM) is analogous to the output HV (UA).
Schematic:
A monitor voltage of 7 V
indicates a HV of 7 kV.
UM = Monitor voltage
± 20 %
UA = Output HV
Internal resistance = 5 k
Ω
If using a PLC system, implement signal “HV OK”:
The signal from pin 3 (pin 5 = GND) is read into the PLC via an
analogue card and converted according to the application.
Alternatively, an adjustable threshold switch can be used. Set the
threshold to 4.2 V and connect the output to a digital input of the
PLC.
A Monitor voltage 0 to 10 V
DC
B Threshold switch
C Potential-free NO (normally
open) contact
D GND