10
Flame detection – detection electrode :
Short-circuit current
Max. AC 1 mA
Required detector current
Min. DC 2
μ
A, display approx. 45 %
Possible detector current
Max. DC 3
μ
A, display approx. 100 %
Permissible length of detector cable (laid separately)
30 m (core-earth 100 pF/m)
Measuring circuit
Keys
C
-
Electrolytic condenser 100...470
μ
F; 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)
Intensity (parameter 954) approx. 12 %
- Operation
Intensity (Parameter 954) approx. 13 %
Operating voltage
AC 280 V ±15 %
Mains frequency
50...60 Hz ±6 %
Required detector current
Min. 70
μ
A
Possible detector current
- Operation
Max. 700
μ
A
Perm. length of detector cable
- Normal cable, laid separately ¹)
Max. 100 m
¹)
Multicore cable not permitted
Keys
A
-
Exposure to light
C
-
Electrolytic condenser 100...470
μ
F; 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.
