Ametek ASR900, Installation And Maintenance Manual

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3-16 | Heated Acid Gas Sample Probe (Large Diameter)
To wire the Probe Heater Assembly:
1. The signal and power conductors can be run in separate or common
conduit ( North American/General Purpose installations ) or cable
( European/Hazardous Location installations ). Terminal Box entries
are ½ " NPT.
Refer to the Sample/Vent Line, Conduit & Tube Installation drawing,
Customer I/O Board drawing, and other related wiring drawings in
the “Supplemental Information” section of the analyzer or HAG Probe
manual.
Connect the conductors that supply power and a ground source from
the Probe Heater to terminals on
J107 of the Customer I/O board.
Connect the Probe Heater RTD to terminal J103 on the Customer I/O
board.
2. Complete the wiring from the analyzer to the Terminal Block in the
Probe Heater Junction Box (see Figure 3-3).
Tighten the screws to secure each wire to the appropriate Terminal
Block location in the Junction Box.
3. Plug all unused cable entry ports with a plug certified for the hazard-
ous area.
4. With the Junction Box o-ring (comes with P/N 300-8743) in place on
the Junction Box Cover, thread the Cover onto the Junction Box Body
by hand and then tighten it using a suitable tool. Take care to avoid
damaging the o-ring and the threads.
Tighten the set screw on the end of the Junction Box Cover.
Install an external ground connection, using the washer and ground
screw on the Junction Box Body. A cable lug must be used to terminate
the conductor so that it is secured against loosening and twisting, and
that contact pressure is permanently secured.
5. Continue with “Powering Up the Probe Heater Assembly and
Analyzer,” later in this chapter.

NOTE