RKI Instruments Pioneer 4W - Manual (Page 107)

CO Transmitter • 4 Pioneer Operator’s Manual
Test points
The test points (labeled TP- and TP+ ) are directly above and below the interconnect
terminal strip. The test points produce a 100 to 500 mV output that is proportional to the
transmitter’s 4 to 20 mA output. Use the test points and a voltmeter to measure the
transmitter’s output during the start-up and calibration procedures.
Junction Box
Use the junction box to install the CO transmitter at a mounting site that is remote from
the Pioneer. The junction box also protects the amplifier and wiring connections made to
the amplifier. Use the two 3/4 in. conduit hubs to mount the detector to the junction box
(bottom hub) and connect wiring from the amplifier to the Pioneer (top hub).
NOTE: The CO detector and amplifier are factory-mounted to the junction box.
Use the junction box’s two mounting holes to mount the CO transmitter to a vertical
surface at the monitoring site. Use the cover on the front of the junction box to access the
interior of the junction box.
Installation
This section describes procedures to mount the CO transmitter in the monitoring
environment and wire the transmitter to the Pioneer Gas Monitor.
Mounting the CO Transmitter
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 transmitter 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
transmitter at approximately breathing level.