Sensor Installation and Connection 5-63
1
Models 8000-FST-IM-4WW-XXX include the 12-volt battery pack; Models 8000-
FST-IM-EP-4WW-XXX (for external power) do not include the battery pack.
2
Extension cables can be ordered to specific lengths up to 300 ft. (91m). Note the
desired length (in feet) in the -xxx-- portion of the part number. Standard lengths
are 10 ft. (3.0m), 25 ft. (7.6m), 50 ft. (15.2m), 75 ft. (22.8m), 100 ft. (30.5m), 125 ft.
(38.1m), 150 ft. (45.7m), and 200 ft. (61.0m). All other lengths must be custom
ordered.
Measuring Manhole Depth
1. Tether Carpenter’s level or other flat, rigid item to keep from
losing it in the flow. This will be used as a measuring reference
point.
2. Extend Grade Pole outside of the manhole and confirm all latches
to keep from losing an unsecured section in the flow.
3. Double-check your Grade Pole scale. (Many pole-scales display
feet and inches while some are in fractions of feet.)
4. Place tethered level or other flat, rigid item across the open
manhole frame.
Placing Carpenter’s level across open manhole frame
5. Insert extended Grade Pole into the invert ensuring that pole end is
in contact with the absolute bottom surface through any silt or
debris that may be present
.
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