Figure 3 Blade antenna attached
Traffic rated manhole lid antenna
Required tools:
•
31.75 mm (1¼ in.) open-end wrench
•
Large nylon Ty-wrap cable ties
1.
Unpack the antenna (
Figure 4
) or disassemble the antenna from the instrument.
2.
Make sure that the manhole lid has a 25.4 mm (1 in.) hole for the antenna neck to fit into.
Note: Do not use the pick hole. Use a drill, motor oil for lubrication and increasing size drill bits to drill the 25.4 mm (1 in.)
hole if needed. Make sure that the location of the hole does not coincide with the ribs on the underside of the manhole lid.
3.
Remove the manhole lid and put the lid in a stable position where the lid top and bottom are accessible.
4.
Remove the nut and washers from the threaded neck on the base of the antenna (
Figure 5
).
5.
Put the antenna cable and neck through a hole on the manhole lid until the base of the antenna is against the
top of the manhole lid.
6.
Install the flat washer, then the lock washer and then the nut on to the threaded neck of the antenna.
7.
Tighten the nut with the open-end wrench until both washers are flush against the base of the manhole lid and
the antenna is tight (
Figure 5
).
8.
Connect the antenna cable to the instrument connector labeled "Antenna". To make sure proper transmission,
hand-tighten the connections.
9.
Attach any excess cable to the access ladder or another non-obstructing location with Ty-wrap cable ties.
10.
Replace the manhole lid.
Figure 4 Traffic rated manhole lid antenna
3
