ATI
Q45S/87 Portable Wet H
2
S Monitoring System
Part 3
– Sensor Information
10
O&M Manual
– Rev-C
Figure 3 shows an exploded view of the duct insertion assembly with the
hydrogen sulfide sensor and cable assembly.
To facilitate installation, disassemble the sensor system so that the front half of
the holder can be screwed into the duct separately.
The front section of the sensor holder assembly is screwed to the duct, and it will
need to be removed periodically to replace the prefilter membrane. Apply teflon
tape to the threads prior to inst
allation and screw this part in “hand tight” to allow
for easy removal.
When taking the sensor assembly apart, first loosen the cable gland at the back
of the adapter so that cable can slide freely. Then unscrew the adapter from the
front holder. The sensor can be pulled out from the holder using the cable.
When inserting the sensor, connect the sensor cable first and use the connector
to press the sensor firmly into place. An o-ring at the front of the holder seals the
compartment. A small amount of o-ring lubricant on the side of the front section
of the sensor will make insertion and removal much easier. Screw the adapter
back in and then tighten the cable gland to seal the cable against water intrusion.
Figure 3 - Duct Sensor Holder Exploded View
