Emerson Rosemount 3812, Руководство по техническому обслуживанию и устранению неисправностей

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Figure 3-55: Junction box installation
A. Transducer wiring terminal blocks
B. Feed-thru foam seal
C. Terminal block mounting plate
D. Junction box O-ring
28. Insert the three standoffs and apply a light coat of Loctite 290 to secure the
standoffs.
29. Position the transducer cables to prevent pinching when the terminal block
mounting plate is attached.
30. Replace the terminal block mounting plate into the junction box and secure with
the three split lock washers and flat head screws (see Figure 3-55 ). Apply a light coat
of Loctite 290 to the three bolts.
31. Cut the new transducer cable(s) to the correct length with allowance for the wiring
terminations. Strip back about 1.5 inches of the cable outer sheath and 1/4 inch of
insulation from the wires.
Note
When stripping the outer sheath of the transducer cable, do not cut into the
insulation of the individual wires.
The transducer cables have two wires and a bare drain wire that must be terminated
on in the Junction box terminal blocks as marked. The red wire connects to the +
(positive) pin, the black wire connects to the - (negative) pin and the bare drain wire
connects to the S-pin (Shield). Reattach the transducer cables to the terminal
blocks with a 3 mm flat blade screw driver and screw the terminal block onto the
Terminal block mounting plate for the corresponding chord (A1, B1, A2, or B2).
Maintenance and Troubleshooting Manual Meter maintenance
00809-0100-3812 April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter 89