Instruction Manual
D102005X012
846 Transducer
June 2017
8
Mounting
WARNING
This unit will vent to the atmosphere through the stroke port in the module cover and the exhaust port, located under the
nameplate. Do not remote vent this unit.
The transducer is designed for mounting on a control valve, 51 mm (2‐inch) diameter pipestand, wall, or panel. Figures
5, 6, 7, and 8 show recommended mounting configurations. The mounting positions shown allow any moisture
buildup in the terminal compartment to drain to the signal wire conduit entrance. Any moisture in the pilot stage area
will be expelled through the stroke port without affecting pilot stage operation. In applications with excessive
moisture in the supply air, vertical mounting allows the most effective drainage through the stroke port.
CAUTION
Do not mount the transducer with the terminal compartment cover on the bottom as moisture, or any corrosive elements
in the plant atmosphere, may accumulate in the terminal compartment or pilot stage, resulting in transducer malfunction.
Mounting is accomplished with an optional universal mounting bracket. Before mounting the transducer, note the
following recommendations:
D Ensure that all bolts are fully tightened. The recommended torque is 22 NSm (16 lbfSft).
D Bolts that connect to the transducer and to a valve actuator should have the lock washer placed directly beneath the
bolt head and the flat washer placed between the lock washer and bracket. All other bolts should have the lock
washer next to the nut, and the flat washer placed between the lock washer and bracket.
D Do not mount the transducer in a location where foreign material may cover the stroke port or exhaust port. See the
descriptions of the stroke port and exhaust port later in this section.
Pressure Connections
CAUTION
Do not use sealing tape on pneumatic connections. This instrument contains small passages that may become obstructed
by detached sealing tape. Thread sealant paste should be used to seal and lubricate pneumatic threaded connections.
As shown in figure 4, all pressure connections are 1/4‐18 NPT internal connections. Use 9.5 mm (3/8‐inch) outside
diameter tubing for the supply and output connections.
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