CM4 Four-Point Continuous Monitor
CM4 Technical Manual
3-2
3.1 Introduction
The installation and initial start-up procedure for the CM4 consists of
six steps, described in this and the following sections:
1. Physical installation of the instrument at the site (Section 3:
Installation).
2. Initial power-up (
3. Instrument programming configurations (
Section 7: Setup
4. Verification of the integrity of the alarm system (
).
5. Adjustment of CM4 sample flow rates (
6. Verification of the optics system (
3.1.1 Mounting Alternatives
The CM4 is designed to be operated in four different configurations:
• Tabletop
• Wall mount
• Rack kit (customer-supplied rack)
• Rack enclosure (MDA-supplied cabinet)
The tabletop is the basic, stand-alone configuration that is used
throughout this manual to show instrument operation. As needed,
certain illustrations will also show the wall mount configuration for
added clarity.
Wall and rack configurations require either adapter kits or a separate
enclosure. See
for information.
When selecting a site for installation of the CM4, consider the mounting
option best suited for your location. Operators can place the CM4 up to
300 feet (90 m) from monitoring points to monitor gas concentrations
in an area removed from the location where gas may actually be
leaking.
3.1.2 Accessory Kit
Your CM4 includes an Accessory Kit (P/N 874265) which contains
this manual (on CD), a calibration card and other items used in
installation.
3.1.3 Installation Steps
Proceed through each of the steps to install the CM4. This section
details physical installation procedures which you should perform in
order:
• Surveying the Installation Site (
• Placement of the CM4 (
)
• Sample Locations (
)
• Configuring for Mounting Method (
for options)
• Installing Sample Lines (
)
• Installing Sample Line Particulate Filters (
)
• Installing Pump Exhaust Line (
• Connecting AC Power Cord (
)
• Wiring Relays (
• Wiring Optional Current Loop (4-20 mA Output) (
)
• Loading Chemcassette
®
)
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