ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 282)

Monitor Installation 7-3
Mounting the Monitor Handle to the
Manhole Wall
If the project will involve measuring flow over a long period of
time, consider mounting the monitor permanently to the manhole
wall. Using a monitor handle (p/n I40-0009), you can hang the
monitor more securely and out of the way to allow use of the rungs.
Mount the monitor handle to the manhole wall as follows:
1. Determine the appropriate location to mount the monitor
handle to the manhole wall. 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.
 Select a location that will allow personnel to enter/exit the
manhole without removing monitor.
2. Hold the top end of the mounting bracket against the manhole
wall, and mark the location for the mounting hole through the
keyhole in the bracket.
3. Drill a hole 75 mm deep at the mark, and install a 10-mm x 75-
mm anchor bolt in the hole.
Note: Make sure all anchor bolts, studs, nuts, and
washers used in mounting the monitor are stainless steel.
4. Twist a nut onto the anchor bolt, but do not tighten it down.
Leave enough space between the nut and the wall for the
thickness of the mounting bracket.