Flame detection – detection electrode :
Short-circuit current
Required detector current
Possible detector current
Permissible length of detector cable (laid separately)
Measuring circuit
Keys
C
-
Electrolytic condenser 100...470 μF; DC 10...25 V
ION
-
Ionization probe
M
-
Microammeter Ri max. 5,000 Ω
Flame detection – UV probe :
Threshold values when flame is supervised by QRA...
- Start prevention (extraneous light)
- Operation
Operating voltage
Mains frequency
Required detector current
Possible detector current
- Operation
Perm. length of detector cable
- Normal cable, laid separately ¹)
¹)
Multicore cable not permitted
Keys
A
-
Exposure to light
C
-
Electrolytic condenser 100...470 μF; DC 10...25 V
M
-
Microammeter Ri max. 5,000 Ω
Warning!
Input QRA... is not short-circuit-proof!
Short-circuits of X10-06/2 against earth can destroy the QRA... input
Simultaneous operation of flame detector QRA... and detection electrode is not permitted
To make certain the age of the UV tube can be determined, the LME7... basic unit must always be connected to mains supply.
Max. AC 1 mA
Min. DC 2 μA, display approx. 45 %
Max. DC 3 μA, display approx. 100 %
30 m (core-earth 100 pF/m)
Intensity (parameter 954) approx. 12 %
Intensity (Parameter 954) approx. 13 %
AC 280 V ±15 %
50...60 Hz ±6 %
Min. 70 μA
Max. 700 μA
Max. 100 m
10