ADS Environmental Services Model 4000 530017 A0 - Manual (Page 60)

Monitor and Sensor Installation 3-37
8. Neatly coil and secure the excess sensor and telephone cables
in the manhole to simplify future monitor service activities.
Secure the cables to plastic anchors or anchor bolts using 14-
inch (35-mm) cable ties.
Note: Be careful to avoid damaging the sensor cables
during installation activities. Even small pinholes in the
cable can cause a sensor to malfunction or fail.
Mounting the Monitor to the Manhole Rim
Mount the monitor to the manhole rim in the following way:
1. Determine the appropriate location to mount the monitor to the
inside of the iron manhole rim. Consider the following when
selecting the proper location:
Select a location that will allow you to remove the monitor
easily during service visits using the mounting bracket
(extension handle).
Select a location that provides only a minimal potential for
the monitor to experience surcharge conditions.
Select a location that will prevent the manhole lid from
potentially damaging the monitor during removal or when
rotating in the opening.
2. Hold the keyhole at the top end of the bracket against the lower
inner rim of the manhole, and mark the location for the
stainless steal stud through the keyhole in the bracket. Make
sure there will be enough room to lift the bracket up and over
the stud when installed.
3. Drill a hole(s) into the manhole rim 1 inch (25 mm) deep using
a 5/16-inch (8 mm) carbide-tipped drill bit.
Note: Consider starting the hole using smaller bits and
increasing up to a 5/16-inch bit. In addition, spray cutting
oil or another lubricant into the hole while drilling and
tapping.