Brand: Honeywell
Category: Gas Detector Transmitter
Document Type: Manual
Language: EN
Manual for CM4
Uploaded: Nov. 21, 2025, 6:07 p.m.
Manual Publish Date: 2011-10-01
Warranty Information
The instrument is warranted for 12 months from first turn-on or 18 months from delivery against defects in materials or workmanship.
The CM4 Four-Point Continuous Monitor continuously samples four locations for toxic gases. It triggers alarms and LEDs, and can activate relays to external devices when programmed alarm levels are exceeded. The instrument displays point number, gas type, and concentration, and can print this information with an optional printer. It supports tabletop, rack, or wall mounting and features MDA Scientific's patented Chemcassette technology for rapid and accurate gas detection. The system is designed for maximum uptime with easily replaceable components.
Troubleshooting and error codes
| Condition | Point Status LED | Alarm LED | Relays Activated | Beeping Audio Alarm | Display |
|---|---|---|---|---|---|
| Monitoring | Green | OFF | -Lowlevelalarmforaffectedpoint | OFF | Currentconcentrations(eachpointdisplayedforfour seconds) |
| Level 1 alarm | Green (steady) | ON | -General low level alarm | ON | Current concentrations |
| Level 2 alarm | Flashing Green | Flashing red | High and low level alarms for affected point | ON | Current concentrations |
| LowChemcassettemaintenancefault(monitoringcontinues) | Green | OFF | Maintenance fault | OFF | Currentconcentrationsfollowedbyfaultmessage(as last message in sequence) |
| Power interruption or CPU fault | OFF or random | OFF or random | Watchdog fault | OFF | Blank or random |
| InstrumentFault(monitoringcontinuesonunaffectedpoints) | Yellow | OFF | Instrument fault | OFF | Currentconcentrationsfollowedbyfaultmessage(as last message in sequence) |
| Instrument fault (monitoring suspended) | Yellow | OFF | Instrument fault | OFF | Fault Message |