Dwyer PSX2 - Manual (Page 143)

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( 5) After fastening the sensor to the pipe, screw to the left side, attach the sensor fi rmly to the pipe.
For 2 paths, connect them on both side of the upstream and the downstream.
Bulletin F-9-PUX2
(5) Connect the detector and the converter
Connect the sensor unit and the converter unit with the signal cable.
For 1 path, connect them on the upstream side.
screws