Connecting The Sensor; Sensor Connections; Figure 2: Sensor Pcb Connections - Pentair GOYEN MECAIR PEM Manual

1. Drill a hole with an ID of at least ∅ 45 mm in the stack/duct where the sensor is to be located.
2. Fit a 1.5" BSP socket, which must be securely welded to the stack. Ensure the BSP socket is 90° to the stack or
at a slight upward angle of about 5°, so the sensor probe points downwards allowing condensate to drain off into
the stack.
3. Insert the sensor probe into the socket and secure with the floating nut. Ensure the sensor enclosure is upright
with the cable entry glands at the bottom and is adequately supported when tightening the floating nut.
NOTE: Ensure the grounding strap connects the sensor securely to the stack/duct via the earth stud assembly
at the rear of the sensor enclosure.
4. Tighten the lock nut. When tightening the lock nut ensure the floating nut is held securely with a wrench.

5.4 CONNECTING THE SENSOR

5.4.1 Sensor Connections

Figure 2: Sensor PCB connections

1 Power IN (mains/AC)
2 Fuse holder (mains fuse)
3 Bus termination switch (set to T/terminated)
4 4–20 mA output
5 RS-485 connector
6 not in use
7 do not use
8 Fault relay (Relay 1)
9 Lid earthing strap (do not remove)
10 Connection to CPU board (do not remove)
11 Power supply/PSU cover (do not remove)
12 INSTALLATION AND OPERATION MANUAL – OWNER'S RECORD PEM MANUAL – PARTICULATE EMISSION MONITOR