8 • 65-2427-05-01 H
2
S Detector
detection range of the detector. The plug-in sensor used for this detector is resistant to
degradation caused by frequent exposure to low levels of H
2
S or occasional exposure to high
levels of H
2
S.
Junction Box
The junction box allows you to install the detector at a mounting site that is remote from a
controller and it protects the detector wiring connections. Two conduit hubs allow you to
mount the detector to the junction box and connect the wiring from the detector to a controller.
Three spacers installed on the back of the junction box control the distance of the junction box
from a mounting surface and ensure that there is enough room to install a calibration cup on
the detector during calibration. The terminal block within the junction box facilitates the
wiring process. A cover on the front of the junction box allows access to the interior of the
junction box.
Installation
This section describes procedures to mount the H
2
S detector in the monitoring environment
and wire the detector to a controller.
Mounting the H
2
S Detector
1. Select a mounting site that is representative of the monitoring environment. Consider the
following when you select the mounting site.
•
Select a site where the detector is not likely to be bumped or disturbed. Make sure
there is sufficient room to perform start-up, maintenance, and calibration procedures.
•
Select a site where the target gas is likely to be found first.
NOTE:
If your application does not require a specific mounting site, mount the detector at
approximately breathing level.
