RKI Instruments M2A - Manual (Page 19)

M2A Transmitter Operator’s Manual 14
Chapter 3: Installation & Startup
Overview
This chapter describes procedures to mount the M2A Transmitter in the monitoring environment
and wire it to input power and devices.
Mounting the M2A 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 M2A 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. For lighter gases, mount the
detector near the ceiling; for heavier gases, mount the detector near the floor.
2. At the monitoring site, use #10 screws through the junction box’s two mounting holes to secure
the junction box to a vertical surface. Figure 11 - Figure 16 show the outline and mounting
dimensions for each version of the M2A. Mount the M2A with the detector facing down as
shown in the following figures.
Figure 11: Outline & Mounting Dimensions, Catalytic LEL
2.3 max
7.7 max
1.02
5.86
4.59
3/4 NPT
Conduit Hub
.47 (2X)
.30 (2X)
2.41
5.00
5.23
1 1/2-20 For
Calibration Cup