ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 129)

Communication 4-11
10. Apply a piece of white release tape onto the top of the antenna,
and then seat the antenna into the bottom of the hole. Once the
antenna is firmly seated, remove the release tape.
11. Apply cold patch asphalt on top of the antenna element. When
using asphalt, scoop the warm material into the hole and then
pound it in using a hammer. Place a piece of wood or metal
between the asphalt and the hammer to prevent the hammer
from sticking to the asphalt. Make sure the asphalt protrudes
slightly above the level of the road surface.
12. Sprinkle a thick (approximately 33-mm) layer of sand over the
asphalt, and then pound the sand lightly into the surface. The
sand must be used to ensure the asphalt does not adhere to
objects, such as vehicle tires, while drying. IETG recommends
dusting the surface with sand once again before leaving the site.
Antenna in cavity with patch
13. Coil the slack antenna cable and temporarily secure it away
from the other cables in the manhole. Slack enables the
technicians to remove the GSM Module from the manhole for
maintenance or service activities with the antenna cable still
connected. Do not bundle the antenna and sensor cables
together! This can significantly diminish antenna and sensor
signal strength, disrupting communications and limiting sensor
accuracy.
Note: To prevent signal loss and damage to the cable and
antenna, do not kink or bend the antenna cable when
coiling.