Diagnostic Connections; Vent Connection; Electrical Connections For Type 3661 Positioners - Emerson Fisher 3660 Instruction Manual

Instruction Manual
Form 5265
March 2006
12B8052-A
A6084*/IL

Diagnostic Connections

To support diagnostic testing of
valve/actuator/positioner packages, special
connectors and hardware are available. Typical
connector installations are shown in figure 16. The
hardware used includes 1/4-inch NPT pipe nipples
and pipe tees with 1/8-inch NPT pipe bushings for
the connectors. The connectors consist of 1/8-inch
NPT bodies and body protectors. If the diagnostic
connectors are ordered for a positioner with gauges,
1/8-inch stems are also included.
Install the connectors and hardware between the
Type 3660 or Type 3661 positioner and the actuator.
1. Before assembling the pipe nipple, pipe tee, pipe
bushings, actuator piping, and connector body, apply
sealant to all threads. Sealant is provided with the
diagnostic connectors and hardware.
2. Turn the pipe tee to position the connector body
and body protector for easy access when doing the
diagnostic testing.
Figure 16. FlowScannert Valve Diagnostic System Connections
3660 and 3661 Positioners

Vent Connection

The Type 3660 and 3661 positioners are equipped
with a 1/4-inch NPT vent connection in the cover.
Electrical Connections for Type 3661
Positioners
WARNING
For intrinsically safe installations, refer
to the loop schematics shown in
figures 27 and 29, factory drawings, or
to instructions provided by the barrier
manufacturer for proper wiring and
installation.
Select wiring and/or cable glands that
are rated for the environment of use
(hazardous area, ingress protection
and temperature). Failure to use
properly rated wiring and/or cable
glands can result in personal injury or
property damage from fire or
explosion.
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