Feig Electronic VEK FG2 Series, Руководство по эксплуатации

Страница: 18 / 18

VEK FG2-1 operating instructions
FEIG ELECTRONIC GmbH 12/99 21
Detector falls off in spite of the loop being occupied
Possible reasons Measures
Insufficient stop period Verification: check the adjusted stop period
Remedy: increase the detector’s stop period resp. set on infinite.
Insufficient mechanical
loop solidity Verification: tap the surface above the loop with a beam and observe diagnostic device VEK FG2 in
detuning position with regard to possible frequency jumping or permanent detuning.
Note: changes in the loop geometry may cause positive as well as negative detuning of the detector.
Positive detuning may lead to a permanent seizure of the detector. In case of negative detuning,
the
detector becomes more insensitive. Extreme frequency jumps may lead to a re-alignment of the
detector.
Remedy: -please make sure that the loop is of sufficient mechanical solidity; there must not be any
deformations in the loop geometry when crossing it with a vehicle.
- the loop must not move compared to the ground armouring.
- for installation under paving stones, please always use finished loops.
Metallic objects within
loop area Verification: use diagnostic device VEK FG2 in detuning position to check frequency fluctuations and
-jumps caused by movements of the metallic object.
Note:
If metallic objects (e.g. manhole covers, grates, loose gates etc.) are surrounded by the loop,
their
movements may cause detunings of the resonant circuit. Should there be permanent, negative
frequency changes, the system may not recognize vehicles which do only cause minor detuning.
Remedy: - re-install loop, so that the metallic object is now outside the loop field.
- replace the metallic object by a non-metallic one.
- prevent movements of the metallic object.
(if necessary, fix manhole covers and grates by welding)
The above chart does not claim to be complete. Further information regarding the loop/detector system may
be found in our brochure
"Vehicle recognition with the induction loop detector" .
9 Index
Alignment 12; 18
to align, detector 12
Number of vehicles 9
Automatic cutoff 9
to adjust detector 12
Sensitivity 7; 12; 15; 17
Error messages 9
Base frequency 7; 8; 12; 19
Stop period 12; 21
Initiation 11
Increments 8; 9
Couplings 7
How to load the accumulator 7;
10
Delivery options 15
Reset 12
Loop installation 11
Malfunctions 11
Survey of detectors 14
Cross-talk 16
Detuning 8; 9; 15
Number of turns 14