i-MARK 2 / i-MARK 3
USER
MANUAL
VISIBILITY DELIVERED.
PAGE 31 OF 55
6.3
Loop Turns
The number of windings in a loop depends on the loop area and therefore the loop circumference.
The larger the loop area, the fewer the windings required.
Loop Area (perimeter) # of Loop Turns
< 2 m
Not recommended
2 – 3 m (6- 10 ft)
4
3 – 6 m (10 – 20 ft)
3
6 – 28 m (20 – 90 ft)
2
> 28 m (> 90 ft)
1
Important Notes
Do not use loops shorter than 2 m.
Do not use more or less loop turns than recommended in the table above. Divergent numbers of
loop turns reduce the maximum achievable range.
In case it is needed to deviate from our recommendations please contact IDENTECs technical
support for consultancy prior to planning or installing.
6.4
Installation
A 5 mm to 8 mm (¼” to ½”) wide and 30 mm to 50 mm (1” to 2”) deep groove must be cut into the
surface to facilitate loop installation. The corners should be cut at 45° to alleviate excessive loads due
to traffic and thermal expansion. (Please refer to drawing below.)
Insulated stranded copper wire (1.5 mm² or AWG 16 gauge) is inserted as tightly and deeply as
possible into the cleaned groove.
The loop should be checked for continuity and eventual shorts prior to covering, by using the ILR
Position Marker’s built-in Antenna Test function.
The groove needs to be filled with tar or epoxy. To eliminate the risk of damaging the insulation, hot
melt sealers should not be used.
