User Manual
Monitor Install ation  7-9 
Posit i oni ng the nuts on the stud to receive the mounting bracket  
11.  Mount the bottom of the mounting bracket onto the monitor 
flange with two 3/8-inch x 1-inch hex bolts, 3/8 – 16 nex nuts, 
and 3/8-inch washers. It may be necessary to drill new holes in 
the flange. 
12.  Carefully lower the monitor into the manhole, and place the 
keyhole in the bracket over the outer nut on the stud. 
Note: ADS strongly recommends attaching a security line 
to the monitor before lowering it into the manhole to avoid 
accidentally dropping the monitor down into the manhole 
during installation. 
13.  Slide the bracket against the inner nut and washer, and tighten 
and secure the outer nut against the bracket. 
14.  Neatly coil and secure the excess sensor and communication 
cables in the manhole to simplify future monitor service 
activities. Secure the cables to plastic anchors or ¼-inch x 2¼-
inch anchor bolts using 14-inch 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. 










