VEK FG2-1
operating instructions
FEIG ELECTRONIC GmbH
12/99
11
4 Accessories
4.1 Contract accessories
•
Cable V: modular plug with flat cable at 3 bunch plugs
Colour code:
red
CH1
blue
CH2
black
GND
•
Cable M: modular plug with flat cable at 10-pole diagnostic plug
•
Power
pack
•
9V
accumulator
(has to be charged prior to initiation !)
•
Service
box
•
Operating instructions for diagnostic device
4.2 Optional accessories
•
Cable M9: 9-pole Sub-D plug,
same functions as cable M, but other plug form for special detectors
Item No.:
VEK FG2 S3/M8 Diagnostic cable
Order No.: 548
•
Cable M4: 4-pole plug,
same functions as cable M, but other plug form for special detectors
Item No.:
VEK FG2 SVEK diagnostic cable
Order No.: 782
•
LCR Meter: fits in service box
Item No.: VEK
FG LCR Diagnostic measuring instruments
Order No.: 546
5 Initiation of induction loop detectors
5.1 Loop installation
5.1.1 Mechanical handicaps
In order to determine the minimum distance between the loops, the following rule applies:
Distance between
two loops
=
At least half of the length of the
parallel edge
The loops of a multiplex detector (e.g. VEK M...) do not affect each other. There is no need for a minimum
distance, which means that the loops may be interlaced without impairing the functioning of the device.
The size of the loop should be suitable so that the vehicle can be recognized. An optimum loop is covered
completely by the object crossing it.
The mechanical fixing of the loop has to be tight, in order to avoid malfunctions of the detector and
deformations of the loop geometry while vehicles are crossing. For this reason, only finished loops should be
used under paving stones.
The loop lead has to be thoroughly twisted (at least 25 twists/m) and installed in appropriate distance to other
live leads. Otherwise, disturbances may occur in the loop lead.
The diameter of the loop wire should be between 0,5mm
2
and 1,5mm
2
.
