Introduction - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor

1.1 Introduction

Individual
Locations
Exhaust
Figure 1-1: Monitoring Points
CM4 Technical Manual
Point 1 Point 3
Point 2 Point 4
! STATUS ALARM LOCATION
1 2 3
MONITOR
1
4 5 6 PROGRAM
2
7 8 9
3 RESET
0
4 ENTER
The MDA Scientific CM4 continuously monitors four locations (called
points) for toxic gases. It responds to gases that exceed a programmed
alarm level by:
• Triggering alarms and LEDs that warn of high or low
concentrations
• Triggering relays to external devices
• D i s p l a y i n g t h e p o i n t n u m b e r , g a s t y p e , a n d
gas concentration
• Printing the alarm information and storing it in memory (printing
requires optional printer)
The CM4 triggers relays for each individual point for two levels of gas
concentrations. These programmable limits are factory-set at TLV and
2 TLV.
Each point may be up to 300 feet (90 m) from the CM4 location. This
allows operators to monitor gas concentrations in an area removed
from the location where gas may actually be leaking.
The CM4 provides fast response to a wide range of gases. It was
designed for maximum uptime, so filters, detector tape, and even the
entire chassis can be replaced quickly and easily.
The CM4's flexibility allows it to be easily configured for tabletop use,
rack mounting or wall mounting. The CM4 uses MDA Scientific's
patented Chemcassette
detection.
This section includes information on the CM4's:
• Sampling and Monitoring System
• Detection System
• Displays and Controls
• Electrical Connections
• Alarms (Section 1.6)
• Instrument Diagnostics
1-2
technology for rapid, accurate gas
®
(Section 1.2)
(Section 1.3)
(Section 1.4)
(Section 1.5)
(Section 1.7)