ADS Environmental Services Model 4000 530017 A0 - Manual (Page 66)

Monitor and Sensor Installation 3-43
2. Continue securing the cables until reaching the ultrasonic
depth sensor or the top of the pipe.
3. Pull the ties until they are taut, and cut off the excess portion of
the cable ties.
Warning: Do not overtighten the cable ties or kink the
sensor cables! The pressure depth cable sheathes two
components: the electrical cables that operate the sensor
and an air tube that ventilates the sensor. Overtightening
the ties or kinking the cable can damage or restrict the air
tube, causing incorrect pressure depth readings. In
addition, make sure the connector-end of the sensor is not
kinked, does not contain moisture, and includes an
attached dryer tube filled with active blue desiccant.
Securing the Cables in the Pipe and Manhole
Securing the sensor cables from the ring (or band, when
applicable), along the pipe crown, and up the manhole helps
prevent debris from collecting on sagging cables or between the
cables and the pipe crown. However, rings or bands installed
within 36 inches (91 cm) of the manhole may not require securing
the cable along the pipe crown. Secure the cables along the pipe
crown under any of the following conditions:
Rings (or bands) installed more than 36 inches (91 cm) from
the manhole
Cables sagging down from the pipe crown
Cables may capture debris during deep flows
Secure the cables from the ring (or band) to the monitor location in
the manhole in the following way:
1. Neatly bundle the cables together with an 8-inch (20 cm) by
0.14-inch (0.4 mm) cable tie attached to a plastic anchor
installed at the top of the pipe.
Drill a 3/8-inch hole in the pipe crown.