Clemco CMS-4 Operation Manual
CMS-4
IN-HELMET CARBON MONOXIDE MONITOR
O. M. 29872
DATE OF ISSUE: 07/2019
REVISION:
WARNING
Do not use this equipment
before READING this
© 2019 CLEMCO INDUSTRIES CORP.
One Cable Car Dr.
Washington, MO 63090
Phone (636) 239-4300
ax (800) 726-7559
F
Email: info@clemcoindustries.com
www.clemcoindustries.com
MANUAL and
UNDERSTANDING its
contents.
These WARNINGS are
included for the health
and safety of the operator
and those in the
immediate vicinity. Failure
to read and understand
these warnings can result
in injury or death.
Electronic files include a
preface containing the
same important
information as in the
orange cover.
PREFACE
• Employers are responsible for identifying all job site hazards, educating and training all persons who will operate and
maintain these products, and ensuring that all blast operators and their assistants understand the warnings and
information contained in these instructions relating to safe and proper operation and maintenance of this equipment.
• Serious injury or death can result from failure to comply with all Occupational Safety and Health Administration
(OSHA)regulations and all manufacturer’s instructions.
• This equipment is not intended for use in any area considered hazardous per National Electric Code NFPA 70 2011,
Article 500.
• Read this document and follow all instructions before using this equipment.
OSHA regulations relating to ab rasi ve bla sting are con tained in the Code o f Federal Regulation s, Title 29 (29 C FR 1910 Gene ral Indust ry ;
1915 Maritime; 1926 Con s truction). The most pertinent include: 1910.94 Ventilation, 1910 .95 Occupational Noise Exposure , 1 910.132
Personal Protective Equipment, 1910.133 Eye and Face Prote cti on, 191 0.134 Respiratory Protection, 1910 .1 35 Head Protection,
1910.244 (b) Remote Controls. Consult www.osha.gov for complete information.
NOTICE
PRODUCTS AND THIS INFORMATIONAL MATERIAL
TO
PURCHASERS
AND USERS OF
OUR
Clemco proudly provides products for the abrasive blast
industry and is confident that industry professionals will use
their knowledge and expertise for the safe and efficient use of
these products.
The products described in this material, and the information
relating to these products, are intended for knowledgeable,
experienced users.
No representation is intended or made as to: the suitability of
the products described here for any purpose or application, or
to the efficiency, production rate, or useful life of these
products. All estimates regarding production rates or finishes
are the responsibility of the user and must be derived solely
from the user’s experience and expertise, not from information
contained in this material.
It is possible that the products described in this material may
be combined with other products by the user for purposes
determined solely by the user. No representations are
intended or made as to the suitability of or engineering
balance of or compliance with regulations or standard practice
of any such combination of products or components the user
may employ.
Abrasive blast equipment is only one component of an
abrasive blasting job. Other products, such as air
compressors, air filters and receivers, abrasives, scaffolding,
hydraulic work platforms or booms, equipment for lighting,
painting, ventilating, dehumidifying, parts handling, or
specialized respirators or other equipment, even if offered by
Clemco, may have been manufactured or supplied by others.
The information Clemco provides is intended to support the
products Clemco manufactures. Users must contact each
manufacturer and supplier of products used in the blast job for
warnings, information, training, and instruction relating to the
proper and safe use of their equipment.
GENERAL INSTRUCTIONS
This material describes some, but not all, of the major
requirements for safe and productive use of blast machines,
remote controls, respirator systems, and related accessories.
All equipment and accessories must be installed, tested,
operated and maintained only by trained, knowledgeable,
experienced users.
The blast operator and all workers in the vicinity must be
properly protected from all job site hazards including those
hazards generated by blasting.
Work environments involving abrasive blasting present
numerous hazards. Hazards relate to the blast process from
many sources that include, but are not limited to, dust
generated by blasting or from material present on the surface
being blasted. The hazards from toxic materials may include,
but are not limited to, silica, cyanide, arsenic, or other toxins
in the abrasives or in the coatings, such as lead or heavy
metals. Other hazards from toxins include, but are not limited
to, fumes from coating application, carbon monoxide from
engine exhaust, contaminated water, chemicals or asbestos.
In addition, physical hazards that may be present include, but
are not limited to, uneven work surfaces, poor visibility,
excessive noise, and electricity. Employers must identify all
job site hazards and protect workers in accordance with
OSHA regulations.
Never modify Clemco equipment or components or
substitute parts from other manufacturers for any Clemco
components or parts. Any unauthorized modification or
substitution of supplied-air respirator parts violates OSHA
regulations and voids the NIOSH approval.
IMPORTANT
Contact Clemco for free booklets:
Blast Off 2 – Guide to Safe, Productive, and Efficient Abrasive
Blasting, and Abrasive Blasting Safety Practices – Guide to Safe
Abrasive Blasting.
Clemco Industries Corp. One Cable Car Drive Washington MO 63090
Tel: 636 239-4300 — Fax: 800 726-7559
Email: info@clemcoindustries.com
Website: www.clemcoindustries.com
[I]
PREFACE
OPERATIONAL INSTRUCTIONS
OSHA regulation 1910.134 requires appropriate respiratory protection for blast operators and workers in
the vicinity of blasting. These workers must wear properly-fitted, properly-maintained, NIOSH-approved,
respiratory protection that is suitable for the job site hazards. Blast respirators are to be worn only in
atmospheres not immediately dangerous to life or health from which wearers can escape without use of
the respirator.
The employer must develop and implement a written respiratory protection program with required
worksite- specific procedures and elements for required respirator use. The employer must provide
effective training to employees who are required to use respirators. The training must be comprehensive,
understandable, and recur annually, and more often if necessary.
NEVER use abrasives containing more than one percent crystalline silica. Fatal diseases, such as silicosis,
asbestosis, lead or other poisoning, can result from inhalation of toxic dusts, which include, but are not
limited to, crystalline silica, asbestos, and lead paint. Refer to NIOSH Alert 92-102; and OSHA CPL 03-00-007:
“National Emphasis Program – Crystalline Silica”, in which OSHA describes policies and procedures for
implementing a national emphasis program to identify and reduce or eliminate health hazards from exposure
to crystalline silica. Numerous topics associated with the hazards of crystalline silica in silica blasting sand
can be found on http:// osha.gov/. Clemco urges users of silica blasting sand to visit this website, and read
and heed the information it contains.
Always make sure the breathing air supply (respirator hose) is not connected to plant lines that supply
gases that include, but are not limited to, oxygen, nitrogen, acetylene, or other non-breathable gas. Never
modify or change respirator air line connections without first testing the content of the line for safe
breathing air. Failure to test the line may result in death to the respirator user.
• Breathing air quality must be at least Grade D,
as defined by the Compressed Gas Association
specification G-7.1, per OSHA Regulation 29 CFR
1910.134. When compressed air is the breathing air
source, a Clemco CPF (suitable sorbent bed filter)
should be used. Respirator hose connecting the
respirator to the filter must be NIOSH approved.
Non- approved hose can cause illness from
chemicals employed to manufacture the hose.
• All workers must always wear NIOSH-approved
respirators when any dust is present. Exposure to
dust can occur when handling or loading abrasive,
blasting, cleaning up abrasive, or working in the
vicinity of blasting. Before removing the respirator,
test the air with a monitoring device to ensure it is
safe to breathe.
For additional information, consult:
Occupational Safety and Health Administration (OSHA) - www.osha.gov
Compressed Gas Association (CGA) - www.cganet.com
The Society for Protective Coatings (SSPC) - www.sspc.org
National Association of Corrosion Engineers (NACE) - www.nace.org
American Society for Testing and Materials (ASTM) - www.astm.org
National Institute of Occupational Safety and Health (NIOSH) - www.niosh.gov
American National Standards Institute (ANSI) - www.ansi.org
OPERATOR SAFETY EQUIPMENT
• Clemco respirators DO NOT remove or protect against
carbon monoxide or any other toxic gas. Monitoring
devices must be used in conjunction with the respirator to
ensure safe breathing air. Always locate compressors and
ambient air pumps where contaminated air will not enter
the air intake.
• Always use Clemco lenses with Clemco respirators;
installing non-approved lenses voids the NIOSH approval.
Respirator lenses are designed to protect the wearer from
rebounding abrasive; they do not protect against flying
objects, heavy high-speed materials, glare, liquids, or
radiation.
INDUSTRY ORGANIZATIONS
[II]
PREFACE
BLAST MACHINES AND REMOTE CONTROLS
OSHA regulation 1910.169 describes the necessity of pressure relief valves on compressed air equipment. Do not
operate blast machines with air compressors that are no t equipped with properly functioning pressure relief valves.
OSHA regulation 1910.244(b) requires the use of remote controls on blast mach ines.
Serious injury or death can result from many sources, among them:
Involuntary activation of the remote controls. Never modify or substitute remote control parts; parts are not
compatible among different manufacturers. Welding hose is not suitable for remote control hose. Its ID and material
composition make it unsafe for remote control use.
Exceeding the maximum working pressure. Clemco blast machines are built to ASME-code and carry a ‘U’ or ‘UM’
stamp, and National Board/serial number. Every machine is marked with its maximum working pressure. Never
exceed the maximum working pressure limits of the blast machine.
Uncontrolled blast stream. High-velocity abrasive particles will inflict serious injury. Always point the blast nozzle
in the direction of the blast surface only. Keep unprotected workers out of the blast area.
Welding on the blast machine. Never weld on the blast machine; welding voids the Nation al Bo ard approval and
may affect the dimensional integrity of the vessel.
Moving the blast machine. Never manually move a blast machine contain ing abrasive, any machine containing
abrasive must be moved with appropriate mechanical lifting equi pment.
HOSES, COUPLINGS, AND NOZZLE HOLDERS
The inside diameter (ID) of air hoses, fittings, and connections
should be at least four times larger than the nozzle orifice size. Blast
hose ID should be three to four times the size of the nozzle orifice.
Example: a #6 nozzle (3/8” diameter orifice) calls for 1-1/2” ID blast
hose and 1-1/2” ID or larger compressor hose. All hose runs should be
kept as short as possible and run in as straight a line as possible to
reduce pressure loss.
To install, squarely cut the end of the hose so that it fits snugly
against the coupling or hose end shoulder. Always use the screws
recommended by the manufacturer ensuring that they do not
penetrate the inner wall. Make sure the couplings tightly fit the hose.
Install cotter pins at ev ery conn ection or use couplings with built-in
lock-springs to prevent disengagement. Install safety cables at all
connections to prevent whipping if hoses disengage or blow out.
MAINTENANCE AND REPAIR
Completely read and follow all service instructions and recommended maintenance intervals. Always shut off compressor and
depressurize blast machine before performing any maintenance. At every service interval, clean all filters, screens, and alarm systems. If
spring-loaded abrasive valves are used, always cage spring before disassembly.
WARRANTY
The following is in lieu of all warranties, express, implied or statutory, and in no event shall seller or its agents, successors, nominees or
assignees, or either, be liable for special or consequential damage arising out of a breach of warranty. This warranty does not apply to any damage or
defect resulting from negligent or improper assembly or use of any item by the buyer or its agent or from alteration or attempted repair by any person
other than an authorized agent of seller. All used, repaired, modified, or altered items are purchased “as is” and with all faults. In no event shall seller
be liable for consequential or incidental damages. The sole and exclusive remedy of buyer for breach of warranty by seller shall be repair or
replacement of defective parts or, at seller’s option, refund of purchase price, as set forth below
:
1. Seller makes no warranty with respect to products used other than
in accordance hereunder.
2. On products seller manufactures, seller warrants that all products are to
be free from defects in workmanship and materials for a
period of one year from date of shipment to buyer , but no warranty is
made that the products are fit for a particular purpose.
3. On products which seller buys and resells pursuant to this order, seller
warrants that the products shall carry the then sta ndard warranties of the
manufacturers thereof, a copy of which shall be made available to the
customer upon request.
4. The use of any sample or model in connection with this order is for
illustrative purposes only and is not to be construed as a warranty that the
product will conform to the sample or model.
5. Seller makes no warranty that the products are delivered free of the
rightful claim of any third party by way of patent infringement or the like.
6. This warrant y is conditioned upon seller’s receipt within ten (10)
days after buyer’s discovery of a defect, of a written notice stating in
what specific material respects the product failed to meet this
warranty. If such notice is timely given, seller will, at its option, either
modify the product or part to correct the defect, replace the product or
part with complying products or parts, or refund the amount paid for
the defective product, any one of which will constitute the sole liability
of the seller and a full settlement of all claims. No allowance will be
made for alterations or repairs made by other than those authorized
by seller without prior written consent of seller. Buyer shall afford
seller prompt and reasonable opportunity to inspect the products for
which any claim is made as above stated.
Except as expressly set forth above, all warranties, express, implied
or statutory, including implied warranty of merchantability, are
hereby disclaimed.
[III]
PREFACE
r
p
r
as
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Co
s
DAILYSET‐ UP CHECKLIST
2. Breathing Air Compressor for
High Pressure Respirators
or Ambient Air Pump for
Low Pressure Respirators
4. External or
Helmet Mounted
Carbon Monoxide
Monitor /Alarm
Make sure all blast operators are properly trained and suitably attired with a blast suit, safety boots, leather gloves, respiratory and hearing protection. Every day before start up,
check all equipment components, including piping, fittings, and hoses, and valves, for leaks, tightness, and wear. Repair or replace as needed. Use the following checklist.
1. PROPERLY-MAINTAINED AIR COMPRESSOR
sufficient volume (cfm) at given pressure for nozzle and other tools. ADD 50%
volume (cfm) reserve to allow for nozzle wear. Use large compressor outlet and
air hose (at least 4 times the nozzle orifice diameter). For oil-lubricated
compressors, the employer shall use a high- temperature or carbon monoxide
alarm, or both, to monitor carbon monoxide levels. If only high-temperature
alarms are used, the air supply shall be monitored at intervals sufficient to
prevent carbon monoxide in the breathing air from exceeding 10 ppm. Follow
the manufacturer’s checklist and maintenance instructions.
2. BREATHING-AIR COMPRESSOR
capable of providing Grade D quality air, located in a dust free area. Read # 1
above.
3. CLEAN, PROPERLY-MAINTAINED NIOSH-APPROVED SUPPLIED-AIR
RESPIRATOR
Make sure all respirator components are in place — all lenses, inner collar, and
cape. Thoroughly inspect all components for wear. The NIOSH approval (approval
number is listed in the owner’s manual) is for a complete assembly from point of
attachment on the CPF (sorbent bed) filter to the complete respirator. Substitution of
any part voids the NIOSH approval.
4. CARBON MONOXIDE MONITOR/ALARM
inside the supplied-air respirator for monitoring for the presence of deadly CO gas
and warning the operator(s) when the CO level reaches an unacceptable level.
When an ambient air pump is used for breathing air, a CO monitor provides a
measure of safety. Read # 1 above.
5. BREATHING-AIR FILTER (OSHA-REQUIRED
removal of moisture and particulate matter in the compressed air breathing-air
supply. Monitor the condition of the cartridge and replace when odor is detected or
at 3 month intervals, whichever comes sooner. The breathing air filter does NOT
detect or remove carbon monoxide (CO). Always install a CO monitor/alarm.
6. BLAST MACHINE
Maximum Working Pressure) sized to hold a 30-minute abrasive supply. Examine
pop-up valve for alignment. Check piping, fittings, screens, valves for tightness,
leaks, and wear. Always ground the machine to eliminate hazard of static shock.
Install a blast machine screen to keep out foreign objects. Use a blast machine
cover if left outdoors overnight. Never exceed the maximum working pressure of the
vessel.
worn by blast operators, and other workers exposed to blast dust.
(bearing U or UM stamp, National Board Number, and
3. NIOSH Approved
Supplied-Air Respirator
5. CPF Air Filter
sized to provide
(or oil-less ambient air pump)
installed at th e CPF filt e r or
sorbent bed filter) for
1. Air Compresso
12. Abrasive
11. Appropriately Sized Nozzle
9. Blast Hose
7. AIR LINE FILTER
blast machine inlet and sized to match the size of the inlet piping or larger air supply
line. Clean filter and drain often. Damp abrasive causes operational problems.
8. REMOTE CONTROLS
operating condition. Test and check all components to ensure all parts are present
and fully functional. Use genuine replacement parts. NEVER mix parts from different
manufacturers. Never use welding hose for remote control hose.
9. BLAST HOSE
The ID should be three to four times the size of the nozzle orifice diameter. Blast hose
should be arranged in as straight a line as possible from the blast machine to the
work area, avoiding sharp bends.
10. COUPLINGS AND NOZZLE HOLDERS
be installed with manufacturer recommended screws. Coupling lugs must snap firmly
into locking position. Gasket must always be used to form a positive seal, and cotter
pins must be installed. Replace gasket when wear, softness or distortion is detected.
Check nozzle holder for thread wear; replace at any sign of wear. Install safety cables
at all connections.
11. NOZZLE
orifice size should be checked and nozzle replaced when worn
1/16” from original size. (No. 5 nozzle has 5/16” orifice diameter; replace when it
measures 3/8”). Threads should be inspected daily for wear and nozzle should be
replaced when wear is detected. Always use a nozzle washer.
12. ABRASIVE
should be properly sized for the job. Check material safety data sheet for freesilica, cyanide, arsenic, lead and other toxins and avoid use when these toxic,
harmful substances are present.
SURFACE TO BE BLASTED
Take appropriate protective measures as required by OSHA to ensure the blast
operator, other workers in the vicinity, and any bystanders are properly protected.
©Clemco Industries Corp., Stock No. 20954P, 0692 Rev. F, 06/12
6. ASME Code
t Machin
Bl
8. Remote
ntrol
7. Air Line
Moisture
arato
Se
10. Hose Couplings and Safety Cables
(moisture separator) installed as close as possible to the
are required by OSHA and must be in perfect
should have an inside diameter sized to suit the blast nozzle.
should fit snugly on the hose and
must be a material specifically manufactured for blasting. It
should be examined for hazardous substances.
[IV]
CMS-4 IN-HELMET CARBON MONOXIDE MONITOR Page 1
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1.0 INTRODUCTION
1.1 Scope of Manual
1.1.1 These instructions cover operation, maintenance,
troubleshooting and replacement parts for the CMS-4
Respirator-Mounted Carbon Monoxide Monitor.
1.1.2 The monitor detects the presence of carbon
monoxide (CO) inside Apollo supplied-air respirators,
where the maximum CO exposure limit in the United
States is 10 parts per million (ppm). This is the limit set
to meet the requirement for Grade D quality breathing air.
The monitor also displays the PEAK level of CO, shortterm exposure limit (STEL), and time-weighted average
(TWA). Instructions to toggle through the PEAK CO
concentrations, STEL, and TWA are explained in
Section 4.3.
1.1.3 All respirator users and those responsible for
maintenance and calibration of the monitor must read
and understand this manual before using the respirator
or operating the monitor.
1.2 Safety Alerts
1.2.1 Clemco uses safety alert signal words, based on
ANSI Z535.4-2011, to alert the user of a potentially
hazardous situation that may be encountered while
operating this equipment. ANSI's definitions of the signal
words are as follows:
This is the safety alert symbol. It is
used to alert you to potential physical
injury hazards. Obey all safety
messages that follow this symbol to
avoid possible injury or death.
NOTICE
Notice indicates information that is considered
important, but not hazard-related, if not
avoided, could result in property damage.
Caution indicates a hazardous situation that, if
not avoided, could result in minor or moderate
injury.
CAUTION
© 2019 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 29872
ARNING
Warning indicates a hazardous situation that, if
not avoided, could result in death or serious
injury.
DANGER
Danger indicates a hazardous situation that, if
not avoided, will result in death or serious
injury.
1.3 Table of Contents
Topic Page Section
INTRODUCTION ..........................................1 ........... 1.0
Scope of Manual ...........................................1 ........... 1.1
Safety Alerts .................................................1 ........... 1.2
Table of Contents .........................................1 ........... 1.3
Specifications .............................................. 2 ......... 1.4
Description of Operation .............................. 2 ......... 1.5
Ancillary Equipment Requirements ............. 3 ......... 1.6
Components and Functions ......................... 3 .......... 1.7
Case ......................................................... 3 ...... 1.7.1
Sensor Retainer ....................................... 3 ...... 1.7.2
Sensor ...................................................... 3 ...... 1.7.3
Sensor Gasket ........................................... 3 ...... 1.7.4
Charcoal Filter (black) .............................. 3 ...... 1.7.5
Hydrophobic Filter (white) .........................3 ....... 1.7.6
LCD (liquid crystal display) ........................ 3 ...... 1.7.7
Control Buttons ......................................... 4 ...... 1.7.8
Alarm-Lights ............................................. 5 ...... 1.7.9
Audible Alarm ........................................... 5 .... 1.7.10
Vibrating Alarm ......................................... 5 .... 1.7.11
Lithium Battery (a spare is included) ......... 5 .... 1.7.12
SETUP - INSTALLATION, STARTUP,
AND OPERATION .......................................5 ........... 2.0
Installation .....................................................5 ........... 2.1
Prepare Mounting Clip ...............................5 ........ 2.1.1
Installation in Apollo 20 .............................5 ........ 2.1.2
Installation in Apollo 60 and Apollo 600 ....6 ........ 2.1.3
Turning ON and Startup Procedure ..............6 .......... 2.2
Setting Date and Time ..................................6 ........... 2.3
Performing a Fresh-Air Adjustment ..............7 .......... 2.4
Turning OFF the CMS-4 ...............................7 .......... 2.5
ALARMS ......................................................8 ........... 3.0
Alarm Indications ..........................................8 ........... 3.1
Alarm Indications Table ................................8 ........... 3.2
Resetting CO Alarms ....................................8 ........... 3.3
Responding to CO Alarms ............................8 ........... 3.4
CO Alarm ...................................................8 ........ 3.4.1
Over Range Alarm .....................................8 ........ 3.4.2
Battery Alarms ...........................................8 ........ 3.4.3
CMS-4 IN-HELMET CARBON MONOXIDE MONITOR Page 2
W
Sensor Failure Alarm .............................. 10 ......... 3.4.4
Clock Failure Alarm ................................. 10 ......... 3.4.5
System Failure Alarm .............................. 10 ......... 3.4.6
Alarm Setpoints .......................................... 10 ............ 3.5
MANEUVERING THROUGH MENU MODES 10 .............. 4.0
Measuring Mode ......................................... 10 ........... 4.1
Entering Measuring Mode ....................... 11 ......... 4.1.1
User Mode .................................................. 11 ............ 4.2
Entering User Mode ................................ 11 ......... 4.2.1
Tips for Using User Mode ....................... 11 ......... 4.2.2
Display Mode .............................................. 12 ............ 4.3
Entering Display Mode ............................ 12 ......... 4.3.1
Tips for Using Display Mode ................... 13 ......... 4.3.2
Display Mode Menu Item (Ref. Table) ........ 13 ......... 4.3.4
Displaying the PEAK Screen .................. 14 ......... 4.3.5
Displaying the STEL Screen ................... 14 ......... 4.3.6
Displaying the TWA Screen .................... 14 ......... 4.3.7
Maintenance Mode ..................................... 14 ............ 4.4
Return to Factory Default Settings ........... 14 ......... 4.4.1
Entering Maintenance Mode .................... 15 ......... 4.4.2
Performing a Default (M.DEF) ................. 15 ......... 4.4.3
CALIBRATION, FRESH-AIR ADJUSTMENTS,
BUMP TEST, and STORAGE ................... 15 ........... 5.0
Calibration Schedule ............................. 16 ............ 5.1
Performing Fresh-Air Adjustments ........ 16 ........... 5.2
Fresh-Air Adjustment with Ambient Air .. 16 ......... 5.2.1
Fresh-Air Adj. with 0 PPM CO Test Gas 16 ......... 5.2.2
Prepare Calibration Connector ................ 17 ............ 5.3
Connect Calibration Cup to Monitor ....... 17 ............ 5.4
Remove Calibration Cup from Monitor ... 18 ............ 5.5
Performing a Bump Test ........................ 18 ............ 5.6
Calibrating the CMS-4 ............................ 19 ............ 5.7
Storing the Calibration Kit and Test Gas .. 20 ............ 5.8
MAINTENANCE ......................................... 20 ............ 6.0
Replacing the Lithium Battery ............... 20 ........... 6 . 1
Replacing the Sensor ............................ 21 ........... 6.2
Replacing the Charcoal Filter ................ 22 ........... 6.3
Replacing the Hydrophobic Filter .......... 22 ........... 6.4
TROUBLESHOOTING ............................... 23 ........... 7.0
REPLACEMENT PARTS ............................ 24 ........... 8 . 0
System Replacement Parts .................... 24 ............ 8.1
Monitor Replacement Parts .................... 24 ............ 8 . 2
1.4 Specifications
Target Gas ................. Carbon Monoxide (CO)
Detection Range ...................... 0 to 1000 ppm
Display Increment 0 ‒ 500 .................. 1 ppm
0 ‒ 1000 ................ 5 ppm
CO Sensor ............................ Electrochemical
CO Test Gas ....................................... 25 ppm
Warning Alarm .................................... 10 ppm
Alarm Point, Low ................................. 10 ppm
Alarm Point, High ................................ 10 ppm
1.5 Description of Operation
ARNING
The CMS-4 detects carbon monoxide, which
can be life threatening. When using the CMS-4,
follow the instructions, maintenance,
calibration schedule, and warnings in this
manual to assure proper and safe operation of
the
monitor and to minimize the risk of personal
injury. Carbon monoxide poisoning can result
in death or serious injury.
1.5.1 The CMS-4 respirator-mounted carbon
monoxide monitor detects the presence of carbon
monoxide (CO) inside a supplied-air respirator.
1.5.2 CO is displayed in parts per million (ppm). The
current maximum exposure limit in the United States for
carbon monoxide in Grade D compressed breathing air
is 10 parts per million. If CO concentrations reach the
exposure limit, three alarms occur. The audible alarm
alternates between a high and low tone at about once
per second, the LED lights flash twice per second, and
the vibrator pulses twice per second. If an alarm occurs,
remove the respirator as soon as it is safe to do so.
1.5.3 The CMS-4 offers a full range of features,
including:
Digital liquid crystal display (LCD)
Visual, audible, and vibrating alarms that alert the
user to CO concentrations, malfunction, low
battery, and other conditions as noted within this
manual.
Low battery alarm
Sensor fail alarm
Current time display
Up to 4,000 hours of operation from one battery
* Peak is the highest CO concentration since the
monitor was last turned on. Refer to Section 4.3.5
for additional information on the PEAK screen.
* STEL is an acronym for short-term exposure
limit. It is the average reading over the last 15
minutes. Refer to Section 4.3.6 for additional
information on the STEL screen.
* TWA is the time-weighted average over the last
8 hours. Refer to Section 4.3.7 for additional
information on the TWA screen.
* Although some may find PEAK concentrations,
STEL, and TWA information useful, it is not pertinent
for supplied-air respirator use because the maximum
exposure limit for Grade D breathing air is 10 ppm.
© 2019 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 29872
CMS-4 IN-HELMET CARBON MONOXIDE MONITOR Page 3
1.6 Ancillary Equipment Requirements
1.6.1 In addition to the monitor, the following
equipment is required to operate and maintain the CMS4 Monitor:
Calibration connector with 0.5 LPM fixed-flow
slide valve, tubing, and calibration cup: Stock
No. 29767.
25 ppm Test Gas: Stock No. 25573.
1.7 Components and Functions
Items included with the monitor package are shown in
Figure 1. Callouts shown in Figure 2 are items needed to
perform routine functions.
1.7.1 Case: The CMS-4’s sturdy, high-impact plastic
case is dust proof, water resistant, and .radio frequency
(RF) resistant.
The digital LCD is visible through the clear window on
the front of the case. During normal operation
(Measuring Mode), it displays
CO (Type of gas detection)
Remaining battery life
Current time
The heart symbol pulses, indicating the monitor is
in normal operating status.
In other modes, the LCD displays functions necessary to
operate and maintain the monitor. Refer to menu modes
in Section 4.0.
Below the LCD are two black control buttons: AIR and
POWER/MODE. The operator uses the buttons to make
selections and adjustments though various menus. Refer
to Section 1.7.8 for button functions
To the left of the LCD is the audible alarm opening,
which is located inside the case.
1.7.2 Sensor Retainer: The sensor retainer is located
on the right side of the case and allows access to the
filters, sensor gasket, and sensor.
1.7.3 Sensor: The sensor is held in its socket by the
sensor retainer. The CO sensor is an electrochemical
cell that consists of two precious-metal electrodes in a
dilute acid electrolyte. A gas-permeable membrane
covers the sensor face and allows gas to diffuse into the
electrolyte. The gas reacts in the sensor and produces a
current proportional to the concentration of the target
gas. The current is amplified by the CMS-4’s circuitry,
converted to a measurement of gas concentration, and
displayed on the LCD.
1.7.4 Sensor Gasket: The sensor gasket fits over
and seals around the sensor.
1.7.5 Charcoal Filter (black): A black charcoal filter is
placed into a recess in the filter gasket over the CO
sensor. The charcoal filter disk scrubs H2S and certain
hydrocarbons out of the sample to avoid false CO
readings. If false or elevated CO readings are noticed,
especially in the presence of H2S, change the charcoal
filter. Refer to Section 6.3: Replacing the Charcoal Filter.
1.7.6 Hydrophobic Filter (white): The white, circular
hydrophobic filter sits into the larger recess on the filter
gasket, on top of the charcoal filter.
Calibration Cup
CMS-4 Monitor
Velcro®
Loop Tape
Velcro®
Hook Tape
Transparent
Mounting Strip
Tubing 3/16" x 2 Ft
0.5 LPM Slide Valve
Calibration
Connector
CLEMCO
25 ppm CO
Test Gas
O
N
P
E
C
LES
O
Figure 1
1.7.7 LCD: A digital LCD (liquid crystal display) is
visible through the clear plastic window in the top of the
case. During normal operation in Measuring Mode, the
LCD displays CO concentrations, the time, remaining
battery life, and the heart symbol pulses, indicating the
monitor is in normal operating status. The LCD also
shows information for each of the CMS-4’s operating
modes. Once the monitor is ON, pressing the
Power/Mode or Air control button turns on the LCD
backlight for 30 seconds. NOTE: Except in dark places,
the display is easily seen without the backlight.
© 2019 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 29872
CMS-4 IN-HELMET CARBON MONOXIDE MONITOR Page 4
CMS-4 callouts shown are items
needed to perform routine functions.
Cover Screw
Sensor Retainer
LED Alarm-Lens
Audible Alarm Opening
AIR Button
POWER/MODE Button
LCD Window
Sensor Retainer
CLEMCO
Hydrophobic Filter (white)
Charcoal Filter (black)
Sensor Gasket
Sensor Orientation Slots
Velcro® Loop Tape
Velcro® Hook Tape
Sensor
Mounting Clip
Figure 2
1.7.8 Control Buttons: Two control buttons, AIR and
POWER/MODE, are located below the LCD. The
functions performed by the control buttons are
summarized in the table in Figure 3.
They turn the CMS-4 ON and OFF. They control what is
displayed on the LCD, including time, gas
concentrations, as well as other messages. They also
allow for a fresh-air adjustment, change alarm points,
change the time, and calibrate the instrument.
NOTE: Important points to remember are:
1. The AIR button scrolls through items on the
menus much like a cursor. Once the menu
item is selected, use the POWER/MODE to
enter the selection into the microprocessor.
2. To reverse the direction of change (i.e. from
increasing to decreasing or vice versa):
a. Press and hold AIR.
b. Immediately press POWER/MODE
and then release both buttons.
NOTE: Each screen displays for 20 seconds. If you
do not press a button within 20 seconds, the CMS-4
automatically returns to Measuring Mode.
Button Function
POWER/MODE
AIR
Turns the monitor ON and OFF.
Activates Display Mode.
Enters instruction into CMS-4’s
microprocessor.
Resets alarm after an alarm
condition.
Also
Turns the LCD backlight on
(when monitor is on).
.
Activates the Demand Zero
function (adjusts the CMS-4’s
fresh-air baseline).
Enters instructions into the
CMS-4’s microprocessor.
Increases the value of a
parameter available for
adjustment.
Scrolls through parameter
options.
Also
Turns the LCD backlight on
(when monitor is on).
Figure 3
© 2019 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 29872
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