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6.3
Measuring circuit for detector current measurement
Simultaneous operation of QRA... and ionization
probe is not permitted!
If not observed, there is a risk of impairment of safe-
WARNING
ty functions.
The minimum current necessary for the control box operation is
1 µA. The burner normally supplies a higher current value, so that
no check is needed.
Anyway, if you want to measure the ionisation current, you need to
open the connector (CN1) fitted on the red wire and insert a mi-
croammeter.
Check of signal flame
Display value:
MIN
1 µA
= 20%
MAX
40 µA = 100%
This display is only possible in operating mode or
standby!
WARNING
Display of flame current ION or QRA...
+
+
1..3 s
+
> 3s
20051011
+
Press
for display of the flame signal amplifier.
Signal lamp blinks green.
Display shows FL.1
+
Press
(1...3 seconds), the flame signal current is displayed.
Signal lamp blinks green.
Example: 11
+
When pressing
(>3 seconds), the point after the number begins to blink.
When the button is released, the value is displayed for 2 minutes.
Signal lamp blinks green.
Then, the normal display appears.
Display: Point . blinks, value 11 does not.
Maintenance
LME7...
X10-05/2
X10-05/1
S8615
Key (Fig. 27)
C
Electrolytic condenser 100...470 µF; DC 10...25 V
ION
Ionization probe
Microammeter Ri max. 5,000
M
36
GB
M
C
ION
Fig. 27
Tab. S
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