Teledyne ADFM Hot Tap, Installation And Operation Manual, Page: 47 / 116

ADFM® Flow Meter
Section 2 Setup and Installation
2-27
2.6.2 Sensor Positioning Place the sensor in the straightest possible run, typically at a
minimum of 5 channel diameters downstream from a bend and 2
channel diameters upstream from a bend. The sensor should be
securely positioned, with minimal potential for fouling or
damage from sediment or debris. In installations where high
velocity/debris will be present, you may consider protecting the
entire cable length (i.e., with user-supplied rigid conduit or metal
framing).
Figure 2-24 Sensor positioning
In all installations, the sensor mounting must be firmly anchored
flat against the invert (center) of the channel (zero pitch, zero
roll).
Figure 2-25 Mount sensor flat on channel floor
Note
If debris and/or silt are expected, the sensor must be elevated
with the proper fairing/spacer combination to ensure proper
operation, as described in Section 2.6.7.
> 5 Channel
=
> 2 Channel
=
FLOW
NO
NO
YES