Honeywell CM4 Release Note

CM4 Four-Point Continuous Monitor
Technical Handbook
• TOC
• CM4 Overview
• Controls and Indicators
• Installation
• Basic Operation
• Calibration Mode Funct.
• Review Menu Functions
• Setup Menu
• Service Menu
• Maintenance
• Options
• Specications
• Fault Listing
• Detectable Gases
• Printer Options
• Serial Comm Protocol
• Installation Drawings
• LonWorks®Protocol
• Warranty Statement
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual i
Your Uptime Is Our Top Priority
Because your uptime is our top priority, Honeywell Analytics, Inc. provides you with a 24-hour Emergency Service
Hotline.
During Business Hours: Honeywell Analytics Inc. (U.S.A.)
Corporate Headquarters:
847-955-8200
(Toll-Free) 800-323-2000
www.honeywellanalytics.com
24-Hour Emergency Hotline: [phone]
Record your serial number and installation date for easy reference. To save time when calling for service, please have the serial number
of your instrument available.
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual ii
Symbols Used on Your Instrument
Overview
Your Honeywell Analytics instrument uses several symbols to provide information. Each symbol provides a graphic representation of
equivalent words. The symbols are easily recognizable in any language.
Below is a listing of symbols used on Honeywell Analytics products and a brief description of what the symbols represent. (Your
instrument model might not use all of the symbols listed here.)
Symbols
Power Switch ON
Power Switch OFF
Power Indicator LED
Locked Keypad LED
Alarm LED
Equipment Mounting
Position in Rack
Printer Share Box
Printer
Caution – Refer to accompanying
documents. Caution statements are used to
indicate hazards or unsafe practices which
could result in minor personal injury or
product or property damage.
Ground Terminal
Direct Current (D.C.)
Caution – Risk of electrical shock
Warning – Refer to accompanying
documents. Warning statements are used to
indicate hazards or unsafe practices which
could result in severe personal injury or
death.
Caution – Hot Surface
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual iii
EMC Considerations
Overview
Your Honeywell Analytics instrument has been designed to comply
with applicable Electromagnetic Compatibility (EMC) standards at
the time of manufacture. The design includes ltering, shielding and
bypassing techniques. At the time of certication, simulated customer
Input/Output (I/O) schemes were tested.
All methods used in your equipment for emission supression and
reduction of susceptibility are interactive. Modifications to the
instrument will most likely result in increased emissions and higher
vulnerability to other radiated elds.
Following the guidelines in this EMC Considerations section will ensure
your instrument maintains the highest degree of EMC integrity. The
guidelines listed apply only to I/O emissions and do not apply to A.C.
and D.C. instrument power connections.
Cabling
At a very minimum, all cables should include a braided shield. Ideal
results have been obtained with twisted pair cabling which has a foil
shield surrounding each pair plus foil and 90% braid shielding around
the bundle. While this yields the best results, it can be very expensive.
In addition, ensure local electrical code requirements are met.
Cabling Type
The following cable parameters must be considered:
Braid Must have minimum 90% coverage.
Foil When used with braid, provides 100% coverage.
NOTE:
Do not use foil alone, it has a tendency to break.
Twisted Pair Provides for cancelling of magnetic elds.
Stranded Pair ProvidesthegreatestsurfaceareaMDAScienticproducttestinguses
>90%braidwithfoil(aroundthebundle);twistedpair;stranded24AWG
(minimum wiring for all qualication and certication testing).
Examples:
Belden 83652 2-conductor
Belden 83653 3-conductor
Belden 83654 4-conductor
Belden 83656 6-conductor
All examples are 18 AWG stranded, with 100% shield coverage.
Shield
Termination
Continuationoftheshieldtothecabinetearthgroundismostimportant.
For discrete wire terminations, pigtails to the cabinet (connector)
groundshouldbeextremelyshort(absolutelynogreaterthanthree
inches).
Formulticonductorconnectorterminations,only360°shieldedshells
should be used.
Connectors
All qualification and certification of MDA Scientific products were
achieved with high quality connectors, providing 360° shield coverage.
These connectors generally had metal shells.
Failure to properly secure the connector to the equipment will result in
high emission levels. Also, poorly constructed or improperly assembled
connectors can be a high source of radiated noise and provide a path
for external signals into the instrument.
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual iv
Table of Contents
Your Uptime Is Our Top Priority......................................................................... i
Symbols Used on Your Instrument.................................................................. ii
Overview .................................................................................................................. ii
Symbols..................................................................................................................... ii
EMC Considerations ............................................................................................ iii
Overview ................................................................................................................. iii
Cabling ..................................................................................................................... iii
Cabling Type................................................................................................... iii
Connectors...................................................................................................... iii
1 CM4 Overview
1.1 Introduction ................................................................................................. 1-2
1.2 Sampling and Monitoring System ....................................................... 1-3
1.2.1 Flow Connections ........................................................................... 1-3
1.2.2 Pump ................................................................................................... 1-3
1.2.3 Filters ................................................................................................... 1-3
1.3 Detection System ....................................................................................... 1-4
1.3.1 Chemcassette®Carrier .................................................................. 1-4
1.3.2 Optics and Electronics .................................................................. 1-4
1.3.3 Chemcassette®Detection System ............................................. 1-5
1.3.4 Measuring Gases ............................................................................. 1-5
1.4 Displays and Controls ............................................................................... 1-6
1.4.1 Display................................................................................................. 1-6
1.4.2 Status and Alarm LEDs .................................................................. 1-6
1.4.3 Keypad ................................................................................................ 1-6
1.4.4 Power LED.......................................................................................... 1-6
1.4.5 Flow Control...................................................................................... 1-6
1.5 Electrical Connections .............................................................................. 1-6
1.5.1 I/O Panel............................................................................................. 1-6
1.5.2 Power Connection .......................................................................... 1-7
1.5.3 Optional Serial Output.................................................................. 1-7
1.6 Alarms............................................................................................................. 1-7
1.6.1 General and Point Gas Alarms.................................................... 1-7
1.6.2 Activating an Alarm........................................................................ 1-7
1.7 Instrument Diagnostics............................................................................ 1-8
2 Controls and Indicators
2.1 Introduction ................................................................................................. 2-2
2.2 Control Panel................................................................................................ 2-2
2.2.1 Display................................................................................................. 2-2
2.2.2 LEDs and Point ID Labels.............................................................. 2-3
2.2.3 Keypad ................................................................................................ 2-3
2.2.4 Power Indicator LED....................................................................... 2-3
2.3 Relays.............................................................................................................. 2-4
2.4 Sample Flow Controls............................................................................... 2-4
3 Installation
3.1 Introduction ................................................................................................. 3-2
3.1.1 Mounting Alternatives .................................................................. 3-2
3.1.2 Accessory Kit..................................................................................... 3-2
3.1.3 Installation Steps............................................................................. 3-2
3.2
Components and Connections for Installation ....................................... 3-3
3.3 Surveying the Installation Site............................................................... 3-3
3.3.1 Placement of the CM4 .................................................................. 3-3
3.3.2 Exposure to Dust and Humidity................................................. 3-3
3.3.3 Sample Transport Time ................................................................. 3-4
3.3.4 Instrument Dimensions ................................................................ 3-4
TOC
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual v
Table of Contents
3.4 Sample Locations ...................................................................................... 3-4
3.4.1 Sample Line Particulate Filter Use............................................. 3-4
3.4.2 Special Considerations for Positive Pressure. 3-4
3.5 Configuring for Mounting Method...................................................... 3-4
3.5.1 Wall Mount ........................................................................................ 3-5
3.5.2 Rack Mount Kit................................................................................. 3-6
3.5.3 Rack Mounting the CM4-P........................................................... 3-7
3.5.4 Rack Enclosures ............................................................................... 3-7
3.6 Installing Sample Lines............................................................................. 3-9
3.6.1 Sample Line Requirements for Installation............................ 3-9
3.6.2 Tubing Connections.....................................................................3-10
3.6.3 Sample Line Inlet Connections ................................................3-10
3.6.4 Point Legend...................................................................................3-10
3.7 Installing Sample Line Particulate Filters.........................................3-11
3.8 Installing Pump Exhaust Line...............................................................3-11
3.8.1 Exhaust Line Installation Guidelines ......................................3-11
3.8.2 Exhaust Tubing Specifications .................................................3-11
3.9 Connecting AC Power Cord..................................................................3-11
3.10 Wiring Relays ...........................................................................................3-12
3.10.1 Relay Contacts .............................................................................3-12
3.10.2 Ratings ...........................................................................................3-12
3.10.3 Wiring Guidelines .......................................................................3-13
3.11
Wiring Optional Current Loop (4-20 mA Output)......................................... 3-13
3.12 Loading Chemcassette®Tape.............................................................3-14
3.13 Power On/Off...........................................................................................3-14
3.14 Installation Notice..................................................................................3-14
3.15 Function and Cursor Keys ...................................................................3-15
3.15.1 MONITOR.......................................................................................3-15
3.15.2 PROGRAM......................................................................................3-15
3.15.3 RESET/ESCAPE .............................................................................3-15
3.15.4 ENTER..............................................................................................3-15
3.15.5 CURSOR ARROW LEFT/RIGHT.................................................3-15
4 Basic Operation
4.1 Introduction ................................................................................................. 4-2
4.2 Monitor Mode.............................................................................................. 4-2
4.2.1 Exiting Monitor Mode ................................................................... 4-3
4.2.2 Printing Time Weighted Averages (TWA) During Monitor
Mode.............................................................................................................. 4-3
4.2.3 Point Lock-On During Monitor Mode...................................... 4-3
4.2.4 Display Lock-On During Monitor Mode ................................. 4-4
4.2.5 Alarm History During Monitor.................................................... 4-4
4.2.6 Fault History During Monitor Mode......................................... 4-5
4.2.7 Display Point Flows During Monitor Mode............................ 4-5
4.2.8
Advance Chemcassette Tape During Monitor Mode..........................4-5
4.3 Program Mode............................................................................................. 4-5
4.4 Alarms and Faults ....................................................................................... 4-6
4.4.1 Alarms ................................................................................................. 4-6
4.4.2 Faults ................................................................................................... 4-6
4.5 Accessing Programming Functions ..................................................... 4-6
4.5.1 Programming by Scrolling........................................................... 4-7
4.5.2 Programming Using Direct Numeric Entry............................ 4-7
4.6 CM4 Menu Structure ................................................................................. 4-8
4.7 Keypad Locking Feature .......................................................................... 4-9
5 Calibration Mode Functions
5.1 Introduction ................................................................................................. 5-2
5.2 Function 1.1 – Optics Verify .................................................................... 5-2
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual vi
Table of Contents
5.3 Function 1.2 – Manual K-Factor ............................................................ 5-3
5.4 Function 1.3 – Calibrate Current Loop ............................................... 5-4
5.4.1 Selecting the Signal Levels Manually....................................... 5-5
5.4.2
Selecting Signal Levels – Automatic Ramping .........................5-5
5.4.3 Selecting Signal Levels – Step ................................................... 5-6
5.5 Function 1.4 – Tune Current Loop........................................................ 5-6
6 Review Menu Functions
6.1 Introduction ................................................................................................. 6-2
6.2 Function 2.1 – Alarm History.................................................................. 6-2
6.2.1 Print Alarm History ......................................................................... 6-2
6.2.2 Display Alarm History .................................................................... 6-3
6.3 Function 2.2 – Fault History ................................................................... 6-4
6.3.1 Print Fault History ........................................................................... 6-4
6.3.2 Display Fault History ...................................................................... 6-4
6.4 Function 2.3 – Current TWA ................................................................... 6-5
6.4.1 Print TWA............................................................................................ 6-5
6.4.2 Display TWA ...................................................................................... 6-6
6.5 Function 2.4 – Last Power-Down ......................................................... 6-6
6.5.1 Print Last Power-Down ................................................................. 6-6
6.5.2 Display Last Power-Down ............................................................ 6-7
6.6 Function 2.5 – Customer Data .............................................................. 6-7
6.6.1 Print Customer Data....................................................................... 6-7
6.6.2 Display Customer Data ................................................................. 6-7
6.7 Function 2.6 – Print Configuration....................................................... 6-8
6.8 Function 2.7 – Instrument Serial Number ......................................... 6-8
6.9 Function 2.8 – Print Menu .....................................................................6-10
7 Setup Menu
7.1 Introduction ................................................................................................. 7-2
7.1.1 Enabling/Disabling the Keypad................................................. 7-2
7.2 Function 3.1 – Point Enable .................................................................... 7-3
7.3 Function 3.2 – Point Parameters ........................................................... 7-3
7.3.1 Select Gas Type, Program Alarms and Set
Current Loop Full Scale Values.............................................................. 7-3
7.3.2 Defining the Point ID ..................................................................... 7-5
7.4 Function 3.3 – Output Options.............................................................. 7-6
7.4.1 Optional COM Port (3.3.1) ............................................................ 7-6
7.4.2 Optional Printer Port (3.3.2)......................................................... 7-7
7.4.3 Printer Format (3.3.3) ..................................................................... 7-8
7.4.4 Relay State (3.3.4)............................................................................ 7-9
7.4.5 2 mA Fault Operation (3.3.5) .....................................................7-10
7.4.6 Enable/Disable Duty Cycle Option (3.3.6)............................7-10
7.5 Function 3.4 – Configuration ...............................................................7-11
7.6 Function 3.5 – Date & Time ...................................................................7-12
7.6.2 Set Date & Time (3.5.2) ................................................................7-12
7.6.3 Set Display Cycle (3.5.3) ..............................................................7-13
7.6.4 Set TWA Printout Time (3.5.4) ...................................................7-13
7.6.5 Set Idle Time (3.5.5) ......................................................................7-14
7.6.6 Set Duty Cycle (optional) (3.5.6) ..............................................7-14
7.7 Function 3.6 – Access Setup.................................................................7-14
7.7.1 Set Key Lock Code.........................................................................7-15
7.8 Function 3.7 – Maintenance Set-Up ..................................................7-16
7.8.1 Chemcassette®Counter (3.7.1) .................................................7-16
7.8.2 Internal Filter Timer (3.7.2).........................................................7-16
7.8.3 External Filter Timer (3.7.3) ........................................................7-17
8 Service Menu
8.1 Introduction ................................................................................................. 8-2
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual vii
Table of Contents
8.2 Function 4.1 – Relay/LED Test ............................................................... 8-2
8.3 Alarm Tests.................................................................................................... 8-3
8.3.1 Function 4.2.1-Alarm Indicator Test.......................................... 8-3
8.3.2 Function 4.2.2-Simulated Alarm Test ....................................... 8-3
8.3.3 Function 4.2.3-Optics Alarm Test............................................... 8-5
8.4 Function 4.3 – Diagnostics...................................................................... 8-7
8.5 Function 4.4 – Reset System................................................................... 8-8
8.6
Function 4.5 – Load Chemcassette®/Filter Change ..............................................8-8
8.7 Function 4.6 – Set Flow ..........................................................................8-11
8.8 Function 4.7 – MDA Service..................................................................8-12
8.9 Function 4.8 – Pump Limits ..................................................................8-12
8.9.1 Operation.........................................................................................8-12
8.9.2 Set-up................................................................................................8-12
8.10 Function 4.9 – Reboot ..........................................................................8-13
9 Maintenance
9.1 Introduction ................................................................................................. 9-2
9.2 Chemcassette®Maintenance.................................................................. 9-2
9.2.1 Remove Carrier ................................................................................ 9-2
9.2.2 Verify Optics ...................................................................................... 9-4
9.2.3 Loading the Carrier......................................................................... 9-5
9.2.4 Installing the Chemcassette® ...................................................................................................9-6
9.2.5 Checking Flowrates........................................................................ 9-7
9.3 Filter Maintenance ..................................................................................... 9-8
9.3.1 CM4 Internal Filter Replacement Procedure ......................... 9-9
9.3.2 Sample Line Particulate Filter...................................................9-10
9.3.3 CM4-P Filter Maintenance..........................................................9-10
9.4 Fuse Replacement....................................................................................9-11
9.4.1 AC Line Fuse....................................................................................9-11
9.5 Cleaning the Chemcassette®Optics...................................................9-12
9.6 Installing Microtube Assembly............................................................9-13
10 Options
10.1 Communications Options...................................................................10-2
10.1.1 Serial Communications ............................................................10-2
10.1.2 Printers ...........................................................................................10-2
10.2 Remote Alarm Reset Option ..............................................................10-2
10.2.1 How it Works.................................................................................10-2
10.2.2 Wiring Considerations...............................................................10-3
10.2.3 Using an External Power Supply ...........................................10-3
10.2.4
Using the CM4 Monitor’s Internal Power Supply ....................... 10-3
10.3 Sample Line Integrity Option ............................................................10-5
A Specifications
A.1 Introduction.................................................................................................A-2
A.2 Filter Compatibility....................................................................................A-2
A.3 General Specifications..............................................................................A-3
A.3.1 CM4......................................................................................................A-3
A.3.2 CM4-P..................................................................................................A-3
A.4 Transport Times ..........................................................................................A-4
B Fault Listing
B.1 Fault Codes ...................................................................................................B-2
B.2 Leak Check Procedure ..............................................................................B-8
C Chemcassette®Detectable Gases
D Printer Options
D.1 Overview...................................................................................................... D-2
D.1.1 RS-232C............................................................................................. D-2
D.1.2 RS-422................................................................................................ D-2
D.1.3 Desktop Printer .............................................................................. D-2
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual viii
Table of Contents
D.1.4 Enclosure Printer Kit ..................................................................... D-2
D.1.5 Printer Share Box ........................................................................... D-2
D.2 Jumpers........................................................................................................ D-3
D.3 Cabling.......................................................................................................... D-4
D.3.1 EMC Considerations ..................................................................... D-4
D.3.2 Cabling Diagrams.......................................................................... D-5
D.4 Instructions and Checklist ..................................................................... D-7
D.5 Other Applications ................................................................................... D-9
E Serial Communications Protocol
E.1 Introduction ................................................................................................. E-2
E.1.1 Overview.................................................................................................... E-2
E.1.2 Communication Port ............................................................................. E-2
E.1.3 Set up Procedure..................................................................................... E-3
E.1.4 Protocol Specifics.................................................................................... E-3
Data and Packets ....................................................................................... E-3
Checksum (Check Character) ................................................................ E-4
ACK/NAK Handshake ............................................................................... E-4
E.2 Protocol Packet Definition....................................................................... E-5
E.2.1 Packet Format .......................................................................... E-5
Start Code..................................................................................................... E-5
Receiver Address........................................................................................ E-5
Transmitter Address.................................................................................. E-5
Length ........................................................................................................... E-5
Command..................................................................................................... E-5
Data ................................................................................................................ E-5
Checksum..................................................................................................... E-5
E.2.2 Generic Data Formats............................................................................ E-6
Date Format................................................................................................. E-6
Time Format ................................................................................................ E-6
Date/Time Examples ................................................................................ E-6
Concentration Data Format Code ....................................................... E-6
E.3 Protocol Command Definition............................................................... E-7
E.3.1 Status and Query Commands............................................................. E-7
NOP - 0x28 ................................................................................................... E-7
Get System Information - 0x30............................................................. E-7
Get Unit Status - 0x31 .............................................................................. E-8
Get Idle Time - 0x32 ................................................................................E-10
Get Date & Time - 0x33..........................................................................E-10
Get Maintenance Dates - 0x34............................................................E-10
Get Point Configuration - 0x35...........................................................E-11
Get Alarm History - 0x36.......................................................................E-11
Get Current Point Status - 0x37 ..........................................................E-12
Get TWA Time - 0x38 ..............................................................................E-12
Get Display Cycle Time - 0x39 ........................................................E-12
Get the Number of Gas Tables Available - 0x3A...........................E-13
Get Printer Setup - 0x3B........................................................................E-13
Get Gas Table Data - 0x3C.....................................................................E-13
Get Fault History - 0x3D ........................................................................E-14
Get K-Factor - 0x3E..................................................................................E-14
Get Pyrolyzer Temperatures - 0x42 ...................................................E-15
Get Pump Limits - 0x43 .........................................................................E-15
Get Filter Life - 0x44................................................................................E-15
Get Floating Status - 0x45 ....................................................................E-16
Get One Alarm - 0x47 ............................................................................E-17
E.4 Configuration and Directive Commands.........................................E-17
Set K-Factor - 0x50...................................................................................E-17
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual ix
Table of Contents
Reset Fault or Alarm - 0x51 ..................................................................E-18
Set Key-Code - 0x52................................................................................E-18
Lock Keyboard - 0x53.............................................................................E-19
Set 2mA Fault Operation - 0x54 .........................................................E-19
Start New Cycle - 0x55...........................................................................E-19
Program Chemcassette Counter - 0x56...........................................E-20
Set Printer Configuration - 0x57.........................................................E-20
Set Point Enable/Disable – 0x58 ........................................................E-21
Set Point Configuration - 0x59............................................................E-21
Set TWA Time - 0x5A...............................................................................E-22
Set Display Time - 0x5B .........................................................................E-22
Set Idle Time - 0x5C.................................................................................E-22
Set Date Format - 0x5D .........................................................................E-23
Set Date and Time - 0x5E ......................................................................E-23
Set Relay State - 0x5F.............................................................................E-24
End Point Lock-on - 0x60 ......................................................................E-24
Start Point Lock-on - 0x61 ....................................................................E-24
Save Current Configuration - 0x62....................................................E-25
Restore Configuration - 0x63 ..............................................................E-25
Set Duty Cycle - 0x65..............................................................................E-25
Set Filter - 0x66.........................................................................................E-26
Get Duty Cycle - 0x69.............................................................................E-26
E.5 Operation ....................................................................................................E-27
E.5.1 CM4 Instrument Power-up ................................................................E-27
E.5.2 Commands ..............................................................................................E-27
E.5.3 Responses................................................................................................E-27
E.6 Example Packets .......................................................................................E-27
E.7 Serial Device Applications.....................................................................E-31
E.7.1 Impedance Matching...................................................................E-33
E.8 Glossary ..................................................................E-34
F Installation Drawing
G LonWorks®Protocol
G.1 Introduction.................................................................................................G-2
G.2 Enabling LonWorks ...................................................................................G-2
G.2.1 Verifying the Installation......................................................................G-2
G.2.2 Operation..................................................................................................G-3
G.3 LonWorks Retrofit......................................................................................G-4
G.3.1 Parts.............................................................................................................G-4
G.3.2 Installation ................................................................................................G-5
G.3.2.1 Connection to CPU (All Units) ................................................G-7
G.4 Wiring.............................................................................................................G-7
G.4.1 Wiring Kits .................................................................................................G-7
G.4.2 Cable and Junction Boxes...................................................................G-7
H Warranty Statement
Chemcassette®Device Warranty Statement ............................................H-2
Chemcassette®Warranties .............................................................................H-2
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 1-1
1 CM4 Overview
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 1-2
1.1 Introduction
Point 1
Point 2
Point 3
Point 4
Individual
Locations
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONITOR
STATUS ALARM
!LOCATION
PROGRAM
RESET
ENTER
Exhaust
Figure 1-1: Monitoring Points
The MDA Scientic 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
• Displaying the point number, gas type, and
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 lters, detector tape, and even the
entire chassis can be replaced quickly and easily.
The CM4’s exibility allows it to be easily congured for tabletop use,
rack mounting or wall mounting. The CM4 uses MDA Scientific’s
patented Chemcassette®technology for rapid, accurate gas
detection.
This section includes information on the CM4’s:
• Sampling and Monitoring System (Section 1.2)
• Detection System (Section 1.3)
• Displays and Controls (Section 1.4)
• Electrical Connections (Section 1.5)
• Alarms (Section 1.6)
• Instrument Diagnostics (Section 1.7)
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 1-3
1.2 Sampling and Monitoring System
The system draws sample flow simultaneously from all four points.
Two dierent types of sample movement are:
• Transport flow: high-velocity, large-volume air movement
through the lines
• Sample flow: air admitted to the Chemcassette®detection
system
The high speed of transport ow allows rapid monitoring and response
time when using long lines from monitoring points to the CM4. A small
portion of the transport ow is analyzed to determine concentration
levels.
NOTE:
OnnewerstyleCM4(S/NXXX-5000andgreater)andallCM4-P
models, the ow controls (item 6) are located on the lower left
of the front panel. An ambient air lter (item 10) is located on
the lower right.
The ow system includes:
Flowconnections(Manifolds) Orice
Pump Valves
Filters Transducers
1.2.1 Flow Connections
Flow connections consist of quick-connect ports on the back of the
CM4. There are four inlets, one for each monitored point, and an
exhaust outlet.
1.2.2 Pump
The pump provides a vacuum source for transport and sample flow
during monitoring.
1.2.3 Filters
Filters protect the internal precision orice from dust particles. Filters
are located in a removable lter block on the top of the instrument.
See Section 9 for information about lter replacement.
Figure 1-2: CM4 Components and Controls
LEGEND
1. Tape load lever
2. 20-character display
3. Alarm relays
4. Detectors and electronics
5. Status and alarm LEDs
6. Flow controls
7. Keypad
8. Filter block
9. Carrier
10. Air lter
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONITOR
STATUS ALARM
!LOCATION
PROGRAM
RESET
ENTER
3
2
1
4
10 7
8
5
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONITOR
STATUSALARM
!LOCATION
PROGRAM
RESET
ENTER
Table Mount Wall Mount
9
6
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CM4 Four-Point Continuous Monitor
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1.3 Detection System
The CM4 uses the patented MDA Scientific Chemcassette®detection
system. Chemcassettes®sample and detect a specific gas or family
of gases. The Chemcassette®detection system is included on an
analyzer plate on top of the CM4. The analyzer plate:
• Retains the Chemcassette®carrier
• Manages Chemcassette®transport
• Provides optical detection of stain
• Directs sample ow through the Chemcassette®
Components of the detection system include:
• Chemcassette®carrier containing Chemcassette detection
tape
• Optics and electronics for the detection system
• Chemcassette®tape transport mechanism
1.3.1 Chemcassette®Carrier
The Chemcassette®carrier can be pre-loaded with Chemcassette®
tape for rapid tape change.
1.3.2 Optics and Electronics
The heart of the Chemcassette®system is an optical detection system
that measures the stain that develops on the Chemcassette®tape.
The CM4’s unique design has four individual detectors, one for each
monitoring point. See Figure 1-3 for point stain location.
To monitor a point, the detection system detects and measures a
specic gas or family of gases in the sample. The CM4 interprets the
data and responds appropriately. See Section 3.4 for instructions
on determining sample locations and Section 3.6 for information on
installing sample lines.
1234
Chemcassette Tape
Monitoring Points
4321
Monitoring Points
Chemcassette Tape
(as viewed in table top position)
(as viewed in wall mount position)
Figure 1-3: CM4 Point Stain Pattern
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1.3.3 Chemcassette®Detection System
1
2
3
4
5
FLOW
6
7
Figure 1-4: Chemcassette Detection System
Legend
1 Chemcassette®tape 5 Sample inlet
2 Electronics 6 Pressure transducer port
3 LED light source 7 Sample outlet
4 Detector
1. The sample enters the inlet (5) and passes through the
Chemcassette®tape (1) to the sample outlet (7).
2. Target gas in the sample flow reacts with the Chemcassette®
tape (1) and produces a stain density proportional to the gas
concentration.
3. An LED (3) in the CM4 detector head illuminates the sample
stain. The detector (4) optically measures the stain.
4. The CM4 CPU interprets the stain, then reports a precise
concentration level in parts-per-million (ppm) or parts-per-
billion (ppb).
1.3.4 Measuring Gases
Chemcassettes®are available for measurement of gases as well as
families of gases. Gases and families the CM4 detects include (See
Appendix C for more information):
Ammonia (NH3) Hydrogen Iodide (HI)
Arsine (AsH3) Hydrogen Selenide (H2Se)
Boron Triuoride (BF3) Hydrogen Sulde (H2S)
Chlorine (Cl2) Hydrazine (N2H4)
Chlorine Dioxide (ClO2) Monomethyl Hydrazine (MMH)
Diborane (B2H6) Nitrogen Dioxide (NO2)
Dimethyl Amine (DMA) Phosgene (COCl2)
DimethylHydrazine(UDMH) Phosphine (PH3)
Fluorine (F2) Silane (SiH4)
Germane (GeH4)Sulfur Dioxide (SO2)
Hydrogen Bromide (HBr) Tert-Butyl Arsine (TBA)
Hydrogen Chloride (HCl) Tert-Butyl Phosphine (TBP)
Hydrogen Cyanide (HCN) Triethyl Amine (TEA)
Hydrogen Fluoride (HF) Tetrakis(dimethylamino) titanium
(TDMAT)
The pyrolyzer Model CM4-P is specially designed to detect special gases
using high temperature to “crack” those gases into Chemcassette®
detectable gases. Current CM4-P detectable gases are:
Nitrogen Triuoride (NF3)
Methyl Fluoride (CH3F)
The Model CM4-P is not designed to accept other calibrations, and
cannot be converted.
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 1-6
Detection is accomplished by routing the sample from each of its four
points through a high-temperature device (pyrolyzer). For example, at
high temperature, NF3is converted to Hydrogen Fluoride (HF) which
can be detected with a standard Mineral Acids Chemcassette®tape. The
correlation algorithm between HF and NF3is programmed into the CM4-P,
so the instrument’s display and printouts read directly in ppm of NF3.
1.4 Displays and Controls
See Figure 1-2
The displays and controls clustered on the front panel of the CM4
include:
Display Power LED
Status and Alarm LEDs Flow Control
Keypad
1.4.1 Display
The CM4 uses a 1-line, 20-character display. The CM4 display includes
information about concentration and instrument faults and provides
menus for CM4 programming. For more information on the display
panel, see Section 2.
1.4.2 Status and Alarm LEDs
Status LEDs light green when the CM4 is monitoring the point. There
is one LED for each point.
• Light green - normal operation
• Flash green - point lock-on or display lock-on at that point
• Light yellow - instrument fault on that point
• Turn black - not monitoring that point
NOTE:
Status LEDs also turn yellow or ash to indicate an instrument fault.
Alarm LEDs signal gas level alarms for each point. Alarm LEDs:
• Light for Level 1 alarm concentration
• Flash for Level 2 alarm concentration
1.4.3 Keypad
Use the keypad to:
• Program the CM4
• Select specic points to monitor
• Print and display programming parameters
1.4.4 Power LED
The power LED at the bottom right of the panel indicates the CM4
is powered up. A blinking yellow power LED indicates the keypad is
locked, requiring a passcode for any CM4 operation.
1.4.5 Flow Control
Four metering valves, one for each point, control the sample flow
through the Chemcassette®detection system.
1.5 Electrical Connections
All electrical connections are made at the rear of the CM4. User
installed wiring connects to a removable relay panel at the top of the
instrument, allowing the chassis to be removed without disturbing
connections.
1.5.1 I/O Panel
The I/O (Input/Output) panel contains connections to 14 form C relays
to activate external devices:
• A watch dog relay (RY12) which indicates power loss or a
CPU failure
• Eight gas alarm relays which indicate Level 1 and Level 2
alarms
• Two general gas alarm relays which indicate Level 1 and Level
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 1-7
2 alarms at any point
• A Maintenance fault relay (RY8) which indicates the CM4 needs
attention but is continuing to monitor
• An Instrument fault relay (RY10) which indicates the CM4 is
unable to monitor one or more points
In addition, the I/O panel includes:
• Terminals for the current loop options, which produce a 4-20
mA output signal in direct variation to the gas concentration
at each point
• Terminals for the remote reset option, which permit resetting
of faults and alarms for specic points
1.5.2 Power Connection
Connect AC power to the CM4 at the rear panel. The power switch is
located above the power line connection.
1.5.3 Optional Serial Output
Install the optional DB9 (nine-pin) serial data and printer connectors
on the back panel.
1.6 Alarms
The CM4 has alarms that:
• Warn of Level 1 or Level 2 low or high concentrations of the
monitored gas
• Trigger relays to external devices
Section 3.10 describes wiring.
Section 4 describes operation modes and basic operating procedures.
1.6.1 General and Point Gas Alarms
The factory default setting for the Level 1 alarm is the threshold limit
value (TLV) of the monitored gas. The default setting for the Level 2
alarm is two times the TLV. Level 1 and 2 alarms can be factory set
to 1/2 TLV and 1 TLV by specifying part number 1874-0330.
You can also set individual alarm levels for each sample point. Separate
alarm levels for each point provide added protection in critical locations
and allow you to customize the settings to meet the specific needs
of your site.
1.6.2 Activating an Alarm
When the CM4 detects a gas concentration that exceeds a
programmed alarm level, it activates a series of signals. The CM4
continues monitoring during an alarm condition.
NOTE:
When a Level 2 alarm activates, the Level 1 alarm always activates.
• Alarm LEDs indicate Level 1 and Level 2 alarms for the
appropriate point
• The gas alarm relay contacts activate for the appropriate point
• The general alarm contacts activate
• The display continues to show the point number, gas type and
gas concentrations
• The instrument generates the appropriate current loop signal
(2-20 mA/4-20 mA) and an audible tone
• Alarm information is sent to the printer for printing (if enabled)
• Alarm data (most recent 16 alarm events) is stored in memory
• Alarm information is made available over the optional digital
network port
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CM4 Four-Point Continuous Monitor
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1.7 Instrument Diagnostics
The CM4 provides diagnostic instrument fault and maintenance
requirement indications. These activate one of the following:
• One or both fault relays activate
• On-board memory stores most recent eight fault events for
later recall
• Fault information is sent to the printer (if enabled)
• Status LEDs light yellow for the appropriate point to indicate
instrument faults
• The display shows the fault information
• If the fault generated is an instrument fault and the CM4 is
appropriately congured, the current level on the optional analog
4-20 mA output port is reduced to 2 mA.
Condition Point
Status LED
Point
Alarm LED
Relays
Activated
Beeping
AudioAlarm Display
Monitoring Green OFF All OFF OFF Currentconcentrations(eachpointdisplayedforfour
seconds)
Level 1 alarm Green Red
(steady)
-Lowlevelalarmforaectedpoint
- General low level alarm ON Current concentrations
Level 2 alarm Green Flashing
red
- High and low level alarms for
aected point
-Generalhighandlowlevelalarms
ON Current concentrations
LowChemcassettemaintenancefault(monitoringcontinues)
(See Appendix B)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(monitoringcontinuesonunaectedpoints) Yellow OFF Instrument fault OFF Currentconcentrationsfollowedbyfaultmessage(as
last message in sequence)
Instrument fault
(monitoring suspended) Yellow OFF Instrument fault OFF Fault Message
Table 1-1: Instrument Alarms
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 2-1
2 Controls and Indicators
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CM4 Four-Point Continuous Monitor
CM4 Technical Manual 2-2
2.1 Introduction
This section identies:
• The control panel display, keypad, and LEDs (Section 2.2)
• Relays (Section 2.3)
• Sample ow controls (Section 2.4)
NOTE:
OnnewerstyleCM4(S/NXXX-5000andgreater)andallCM4-P
models, the ow controls (item 6) are located on the lower
left of the front panel. An air lter (item 10) is located on the
lower right.
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONITOR
STATUSALARM
!LOCATION
PROGRAM
RESET
ENTER
3
2
1
4
10 7
8
5
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONITOR
STATUSALARM
!LOCATION
PROGRAM
RESET
ENTER
Table Mount Wall Mount
9
6
Figure 2-1: CM4 Components and Controls
Legend
1 Tape load lever 6 Flow controls
2 20-character display 7 Keypad
3 Alarm relays 8 Filter block
4 Detectors and electronics 9 Carrier
5 Status and alarm LEDs 10 Air lter
2.2 Control Panel
The front control panel consists of:
• Display (1)
• Status and alarm LEDs and point ID Labels (2)
• Keypad (3)
• Power LED indicator (4)
CM4 Gas Monitor
1 2 3 4
Figure 2-2: Control Panel
Legend
1 Display 3 Keypad
2 Status LED and point ID labels 4 Power/Lock LED
2.2.1 Display
The display is a 1-line by 20-character vacuum fluorescent display
that shows program and operation information.
In the Monitor Mode, if no gas concentration is detected and in the
Idle Mode, the display brightness is reduced to 60% of full brightness.
This feature extends the life of the vacuum uorescent display.
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