ORIFICE LINE
WIRING AND CONNECTIONS
The following connections should be made BEFORE applying power:
1)
Data connections (SDI-12 or 4-20mA)
2)
Desiccant assembly
3)
Orifice line
4)
Power
1
FTS supplied orifice line is USGS approved
DO:
•
Encase the orifice line in a conduit
•
Ensure the orifice line’s run is continuously downward with no dips or swells and
no part of the line’s run is lower than the line outlet
•
Use an orifice fitting (part#19063) on the terminal end of the orifice line to aid in
securing the line in a fixed position
•
Install the line outlet perpendicular to the flow in flowing water
•
Secure the terminal end of the orifice line in a fixed position and with a slight
downwards tilt
•
Encase the orifice line in a conduit
RECOMMENDED:
•
Use FTS approved orifice line
(part# 19062)
•
Place the line outlet in calm water (when possible)
•
Use a muffler if water is turbulent
DO NOT:
•
Splice the orifice line
•
Fix the line outlet facing upstream, downstream or upwards
•
Mount the line outlet in the wake of an obstruction (boulder, bridge footing etc.)
•
Mount the outlet line where it can be exposed at low stage
•
Leave the line outlet unsecured
2
