Operating instructions

14
FITTING INSTUCTIONS
Magnets
(1) Grease O-ring on magnet housing.
(2) Remove mast cap and insert the magnets in
their housing into the top tube, O-ring first. The
housing should be a tight fit but if too tight the
O-ring should be trimmed with a sharp knife.
(3) Push the unit down to the bottom of the tube
with a rod and replace the cap.
DO NOT hammer the rod to make sure that the unit
is fully down, since this could disturb the piston on
which the magnet housing is sitting.
Magnetic Switch
(1) The proximity switch should be strapped to the mast such that it may be moved
up and down: nylon cable ties are usually the best.
(2) Connect a meter across the switch and move the switch up and down until the
optimum position is found.
Note: If a length of the top section is being used to directly mount antennas, position
the switch with the antennas in place.
(3) Tighten straps.
Various methods may be used to hold the switch to the mast but obviously DO NOT
drill fixing holes in the mast.
NK & NH NL & NX
Minimum breakdown
voltage
200V DC 500V DC
Maximum current 0.25A 1.5A
Maximum voltage 28V DC
20V AC
-
-
Maximum load 3W 20W
Contact resistance 100m ohm 250m ohm
Cable colour code White-common
Red-N/O
Blue-N/C
Brown-N/C
Blue-common
Black-N/O
Green-case