Nuvair Pro CO2 Analyzer User manual

Operation Manual
Pro CO2AnalyzerTM
Carbon Dioxide Analyzer
02.1.12

If you have any questions on this equipment please contact Technical Support at:
Nuvair
2949 West 5th St.
Oxnard, CA 93030
Phone: [phone]
FAX: [phone]
Email: [e-mail]
Hours: Monday through Friday
8:00 AM to 5:00 PM PST USA
This Operation Manual contains important safety information and should always be
available to those personnel operating this equipment. Read, understand, and retain all
instructions before operating this equipment to prevent injury or equipment damage.
Every effort was made to ensure the accuracy of the information contained within this manual; however,
we retain the right to modify its contents without notice. If you have problems or questions after reading
the manual, stop and call for information.

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Table of Contents
1.0Introduction ....................................................................................................... 4
2.0System Description ……………………………………………………………........ 5
2.1Controls ………………………………………………………….................. 6
2.2Display …………………………………………………………................... 6
2.3Alarm ...................................................................................................... 6
2.4Sensor …………………………………………………............................... 6
2.5Batteries …………………………………………………………….............. 6
2.6Flow Adapter Cap ..............………………………………………………... 7
3.0Calibration ……………………………………………….………………................. 7
4.0Operation........................................................................................................... 8
4.1Sample Flow Method …………………………………….……................... 9
4.2Programming Procedures ………… ………………………………............10
4.3Alarm Setting …………………………………………….............................11
4.4 Full Scale Value Setting …………………………………………………… 11
5.0Threshold Alarms .............................................................................................. 11
6.0 Powering Off …………………………………………………………………………12
7.0 Factory Reset ………………………………………………………………………..12
8.0 Maintenance………………………………………………………………………… 12
8.1Analyzer Care ……………………………………………………................ 12
8.2Battery Replacement …………………………………………………......... 13
8.3Sensor Replacement ……………………………………………................ 13
8.4 Handling Sensor …………………………………………………………. 14
9.0Spares and Accessories ………………………………………………………….... 16
9.1Sensor ………………………………………………………………..............16
9.2Calibration Equipment.…………………………………………….............. 16
10.0 Troubleshooting............................................................................................ 16
11.0 Relay Output Schematics………………………………………………………… 17
Appendix ……………………………………………………………………................... 17
Analyzer specifications ………………………………………………………………… 18
Warranty …………………….…………………………………………….……..............19

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1.0Introduction
This manual will assist you in the proper set-up, operation and maintenance of the Pro CO2TM
Carbon Dioxide Analyzer. Be sure to read the entire manual.
Throughout this manual we will use certain words to call your attention to conditions, practices
or techniques that may directly affect your safety. Pay particular attention to information
introduced by the following signal words:
Indicates an imminently hazardous situation, which if not avoided, will result in serious
personal injury or death.
Indicates a potentially hazardous situation, which if not avoided, could result in serious
personal injury or death.
Indicates a potentially hazardous situation, which if not avoided, may result in minor or
moderate injury. It may also be used to alert against unsafe practices.
Notifies people of installation, operation or maintenance information which is important
but not hazard-related.
Warnings Graphics Defined:
Gas Inhalation Skin damage

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2.0System Description
The Pro CO2TM Carbon Dioxide Analyzer measures Carbon Dioxide (CO2) levels in gases in the
range of 0 to 2000 parts per million (ppm). It can be used to measure the CO2content in all
breathing gas mixes. The Analyzer is designed to verify CO2concentration in stored gas
cylinders as well as to monitor continuous flow of gas from a compressor. The Analyzer is a
moisture and impact resistant unit compatible with outdoor and marine environments.
Carbon Dioxide is a colorless, odorless, tasteless gas that will not support
life. Exposure to Carbon Dioxide can lead to unconsciousness and death.
The Analyzer is battery powered and includes an
internally mounted Sensor with audible alarm.
The Water-Resistant Case includes a Digital
Display and controls that are environmentally
sealed
The Analyzer uses a Flow Adapter Cap and
Flexible tubing to deliver sample gas to the
Sensor. Pressurized gases must be regulated to
avoid damage to the analyzer. Use of this
Analyzer in a hyperbaric chamber will void the
owner’s warranty.
The Analyzer comes in a high impact storage
case. It is ready for use after calibration with an
appropriate certified calibration gas.
This analyzer is designed for use at atmospheric pressures only. It is not designed for
exposures in a hyperbaric chamber. Use of this analyzer in a hyperbaric chamber will
result in incorrect readings and may damage the unit.
Although the Analyzer is a rugged instrument, careless handling or abuse may result in
damage to the Analyzer resulting in inaccurate gas analysis. Inaccurate gas analysis can
lead to serious personal injury or death.
Extreme CO2 exposure levels directed at the Analyzer sensor may damage the sensor.
Flow
Adapter Cap
Over Sensor
Face
Water-
Resistant
Case

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2.1.Controls
2.2.Display
2.3.Alarm
The Analyzer includes an audible alarm that is activated when the Sensor reaches 199 ppm
CO2or user programmed level. The alarm will not clear until the concentration of CO2drops
below user programmed level.
2.4.Sensor
The Analyzer uses an NDIR “non-dispersive infra red” CO2Sensor to measure CO2content in
gases. The Sensor is disposable and user-replaceable, with a life expectancy of up to 24
months depending on usage. The Sensor is designed for use at atmospheric pressure (0 P.S.I.).
The gas mixture to be analyzed must be regulated accordingly, and any potential for pressure or
vacuum must be avoided.
2.5.Batteries
One 9-volt battery provides power. The battery is located inside the Analyzer and is user-
replaceable. The battery should be removed any time the Analyzer will be stored without use
for extended periods of time. Screen will blink alternately from “000” to “bAt” at start up when
battery is low. We also offer a 110/230v electric option.
Digital
Display
On/Off Button
Low Battery
Indication
Adjust Button
“Cal” on older
models
Relay
Output
Program Button
CarbonDioxide
Reading
0 – 2000 ppm
In 1 ppm
increments

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2.6.Flow Adapter Cap
The Analyzer includes a Flow Adapter Cap with flexible tubing and flow orifice. It attaches to the
Sensor port and is sealed by an o-ring. It can be used to direct the gas sample flow to the
Sensor via one of two methods:
Flow to the sensor needs to be restricted to .5-1liter. Increased flow will create faulty readings.
Nuvair offers flow restrictors to accomplish this task. See appendix.
3.0Calibration
Analyzer calibration must be verified on a weekly basis. Improper calibration may result
in an incorrect reading, exposing the user to dangerous levels of Carbon Dioxide.
Exposure to Carbon Dioxide can lead to unconsciousness and death.
This Analyzer must always be checked against a calibration gas and used with gases
regulated and supplied at atmospheric pressure (0 P.S.I.). Use of gases at higher
pressures may result in incorrect readings and may damage the Analyzer. Incorrect
readings may expose the user to high levels of carbon Dioxide resulting in personal
injury or death.
Checking Calibration or use of the Analyzer with a low battery may result in inaccurate
readings. Inaccurate gas analysis can lead to serious personal injury or death.
If the Analyzer has been subjected to a recent change in ambient temperature, allow it to
stabilize for one hour before checking calibration.
Verify calibration on a weekly basis. Breathing gas applications require the use of a certified
CO2calibration gas and flow rate of 0.5-1 L/min. The equipment to produce this flow is
available from Nuvair. See Spares and Accessories section.
To assure the greatest accuracy for other applications, use the calibration gas concentration
closest to the expected concentration in the gas being measured.
Sample Flow Method
Flow is Delivered from
Low Pressure Source
via Flexible Tubing
Direct Flow Method
Flow is Directed to
Flow Orifice on Face
of Flow Adapter Cap
Vent Hole

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4.0Operation
Prior to each Analyzer use:
1) Turn unit on (hold on/off for 3 sec) and monitor Display for low battery warning. Replace
battery immediately if warning appears. The display will count down from 29 PPM to Att
and then display the current CO2 level sensed by the analyzer sensor.
2) Cycle through the current settings of the analyzer.
a. Hold down the “Prog” button for 2 seconds then use the “On/Off” button to cycle
through the low Alarm Value, high Alarm Value, Full Scale Value and end.
b. Adjust Alarm values at this time if needed see “4.2”
3) Check Calibration of Analyzer using “Calibrated Test Gas”
Tip: You can check the battery life and current temperature by holding Adjust button for 3
seconds. The display will alternate from battery life to current temperature (Celsius) twice before
returning the home screen.
Do not test cylinders suspected of containing carbon dioxide in a confined
space that does not have good ventilation. Exposure to carbon dioxide can
lead to unconsciousness and death.
Gas, even under moderate pressures, can cause extreme bodily harm. Never allow any
gas stream to be directed at any part of your body.
Never expose the sensor to pressures above atmospheric pressure (0 P.S.I.) or you may
cause damage to the sensor and/or receive false readings. Damaged Sensors will not
provide accurate gas analysis. Inaccurate gas analysis can lead to serious personal
injury or death.
Low Battery
Indication
Ready For
Gas Analyzing

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The Pro CO2TM can be used to monitor an enclosed space or to analyze a regulated gas sample
flow, the contents of a gas cylinder, or the flow from a regulator:
•If monitoring an enclosed space, simply remove the Flow Adapter Cap to expose the Sensor
face to the atmosphere and allow 15 seconds for the Display reading to stabilize.
•If analyzing a gas flow, the Sample Flow Method is the preferred method. The flow rate
must equal 0.5 to 1 L/min at atmospheric pressure (1 bar). To produce this flow, a Flow
Restrictor and Regulator may be required. Contact Nuvair if you need assistance.
4.1.Sample Flow Method of Checking Calibration (Preferred)
Nuvair offers CO2gas testing kits see addendum for more information.
Testing Gas must not contain Helium for calibration to succeed.
Step 1. Attach
Flexible Tubing
to Gas Sample
Flow of 0.5 to 1
L/min
Step 2. Verify
that Gas is
Flowing Out
Holes in Flow
Adapter Cap
Step 3. Allow Display
Reading to Stabilize
Step 4. Record
Reading while Gas is
Flowing
Flow Restrictor/
Regulator
Assembly
1000 PPM CO
2
Calibration Gas
Canister
Nuvair
Calibration Gas
Specs:
CO 10 ppm
CO2 1000 ppm
Nitrogen Balance

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4.2.Programming Procedures
Keep the “Prog” button pressed for more than two seconds and then release the button.
“Pr” should display for two seconds and then the display will change to AL 1 and alternate
with the 3 digit set value.
It is possible to program:
oAL 1 Low alarm point expressed in ppm of Carbon Dioxide concentration
oAL 2 High alarm point expressed in ppm of Carbon Dioxide concentration
oFSC Value expressed in ppm of Carbon Dioxide concentration corresponding to
the current output full scale value (20mA). 4mA always correspond to 1999 ppm
CO2concentration.
At the end of the programming procedure the display will show “End” and the instrument
will display the Carbon Dioxide content in the gas mix.
Below are the actual screen views of each of the modes. (*Calib button say as adjust)
Program
Low Alarm
High Alarm
Full Scale Value
End

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4.3.Alarm Setting (AL 1 & AL 2)
1.) Press the “Prog” button for more than two seconds and then release the button.
On the display will appear “Pr” for two seconds, then “AL1” will appear and be ready
for changing the value of the low alarm point. After a second the display will show the
value of “AL1” CO2ppm current setting.
2.) The blinking digit shows the cursor position.
3.) Press the “Prog” button to increase the value (from 0 to 9)
4.) Press the “Adjust” button to move the cursor to the next digit, the “Adjust” button will
be used to cycle through the rest of the digits.
5.) To complete your entry and save the CO2ppm value, press the “On/Off” button. You
will then automatically jump to “AL 2” programming view.
6.) Repeat steps 3 through 5 to modify and save the “AL 2” high alarm CO2ppm desired
value.
7.) Once programming of “AL 2” is complete you will be in the “FSC” Value Screen and
ready for programming this value. To jump to the end continue to press the “On/Off”
button until the end screen appears.
4.4.Full Scale Value Setting (FSC)
Once the alarms have been set the Pro CO2Analyzer goes to “FSC” view so that you can
change the analog full scale value. It is not necessary to modify this value which is factory
set at 1999. However if installing a new sensor the value on the sensor can be entered into
the “Fsc” setting and must be entered into the “Fct” setting. This is the Carbon Dioxide
concentration corresponding to 20 mA on the analog output. 4mA is the value at 1999 ppm
of Carbon Dioxide. This value can be changed in the same manner as the Alarm settings:
1.) Press the “Prog” button for more than two seconds and then release the button.
On the display will appear “Pr” for two seconds, then “AL 1” will appear. Press the
On/Off button to cycle through the Alarm settings until you reach the “FSC” view. The
“FSC” screen and a 3 digit value will alternate for a few seconds and the Pro CO2
Analyzer will be ready for adjusting the “FSC” Value.
2.) The blinking digit shows the cursor position.
3.) Press the “Prog” button to increase the value (from 0 to 9) (0-19 on the third value)
4.) Press the “Adjust” button to move the cursor to the next digit, the “Adjust” button will
be used to cycle through the rest of the digits.
5.) To complete your entry and save the FSC value, press the “On/Off” button. You will
then automatically jump to “End” programming view.
5.0. Threshold Alarms
The CO2 analyzer will alarm until it has reached the AL1 (low) set point if the AL1 has
been set. Once the gas is above the AL1 set point the analyzer will not alarm until the
gas value is over AL2 or under AL1 during the gas analyzation. Should the Carbon
Dioxide gas trip the low or high alarms (AL1 or AL2) the instrument will go into alarm
mode and will activate the (optional) relays output (open collector max 100mA) and the
internal buzzer. The display will show the trespassed alarm and the actual measured
value. To stop the audible alarm, press any key. In this event the Pro CO2Analyzer will
remain in alarm mode until the analyzed value reads between the AL1 and AL2 set points.
The relay output typically is used to shut down the compressor. Nuvair can supply the
necessary components to adapt your compressor to the relay or provide them at the time
of install on a new compressor.

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6.0. Powering Off
At the home or gas reading screen, hold down the On/Off button for a couple of seconds.
The Analyzer will display “OFF” and then go blank.
7.0. Factory Reset
In case it is necessary to reset the Pro CO2Analyzer to the factory settings, power on the
Analyzer pressing at the same time for more than one second the “On/Off” and “Adjust”
buttons. On the display will appear “res” and the instrument will go to the reading page.
In case of reset, the instrument will delete all the alarms settings and the full scale value.
Before using again the instrument, it may be necessary to program again the alarm
values and the full scale value. All the analysis concentration shown on the display could
be wrong. Wrong Carbon Dioxide analysis may lead to death. You should calibrate your
analyzer immediately after a reset before using.
8.0. Maintenance
8.1. Analyzer Care
Analyzers immersed in liquid or stored in wet environments may not operate properly.
This may result in incorrect readings. Incorrect gas analysis may result in personal
injury or death.
Protect the analyzer from excessive shock and impact. Excessive shock and impact may
result in incorrect readings. Incorrect gas analysis may result in personal injury or
death.
Protect the analyzer from exposure to hyperbaric environments. Exposure to hyperbaric
environments may result in incorrect readings. Incorrect gas analysis may result in
personal injury or death.

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8.1. Analyzer Care
•Do not clean Analyzer with anything other than a damp soft cloth.
•Do not immerse in liquid, leave unprotected outside, or store in a wet environment.
•Protect Analyzer from excessive shock and impact.
•Protect Analyzer from excessive exposure to sunlight and extreme temperatures.
•Do not use the Analyzer in a hyperbaric environment.
8.2. Battery Replacement
Be sure to dispose of spent, leaking, or damaged Battery properly, according to local
regulations.
The following pictures illustrate the steps required to replace the batteries in the Analyzer.
8.3.Sensor Replacement
Take care not to damage sensor when replacing.
Be sure to dispose of spent, leaking, or damaged Sensors properly, according to local
regulations.
Step 1. Remove
Screws
Step 2. Remove
Back Cover
Step 3.
Remove &
Replace Old
Battery
Step 5.
Reinstall
Screws
Step 4. Replace
Back Cover -
Do Not Pinch
Wires
Step 6. Turn
Analyzer On
Step 7.
Perform
Calibration
Sensor

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Do not swallow (ingest) either the electrolyte from the Sensor or the Sensor itself. The
Potassium hydroxide chemical contained in the Sensor will cause severe injury or death.
If electrolyte or the Sensor is swallowed, seek medical attention immediately.
If after handling the Analyzer or Sensor, you find that your fingers or other
parts of your body feel “slippery” or the skin or eyes sting, immediately
flush affected area with clean, fresh water for at least 15 minutes. The
stinging or slippery sensation is an indication of a leaking Sensor. The Potassium
Hydroxide chemical contained in the Sensor can cause severe injury or death. Seek
immediate medical attention if eye contact is made or skin stinging persists.
8.4 Handling Sensors
Replacement Sensors are supplied in sealed bags. Normally Sensors do not present a health
hazard. Before opening the bag, check that the electrolyte has not leaked. However, if
electrolyte leakage has occurred, do not open bag. Dispose of Sensor properly or return for
replacement. If electrolyte leakage occurs while the Sensor is in service, use rubber gloves and
chemical splash goggles for handling. Rinse contaminated surfaces thoroughly with water.
Electrolyte First Aid Procedures
•Ingestion - Drink a large volume of fresh water. Do not induce vomiting. Get immediate
medical attention.
•Eye Contact - Flush eyes with clean, fresh water for at least 15 minutes and get medical
help immediately.
•Skin Contact - Flush the affected area with clean, fresh water for at least 15 minutes and
removed contaminated clothing. If stinging persists get medical attention.

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The following pictures illustrate the steps required to replace the Sensor in the Analyzer.
Step 1.
Remove Flow
Adapter Cap
Step 2.
Remove
Screws
Step 3.
Remove
Back
Step 4.
Disconnect
Electrical
Connector
Step 5. Remove
Old Sensor from
Case by
Unscrewing
Step 6. Replace
with New
Sensor
Step 7. Remove
Shorting Plug from
Sensor Electrical
Connector & Reconnect
Step 9.
Reinstall
Screws
Step 8.
Replace
Front Cover
- Do Not
Pinch Wires
Step 10. Replace
Flow Adapter Cap
Step 12. Check
Calibration
Note: Reversing Polarity
Will Cause Display to
Read Negative
Step 11. Turn
Analyzer On

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9.0Spares and Accessories
9.1.Sensors
Sensor replacement for Pro CO2
9.2.Calibration Equipment
Calibration check requires certified CO2calibration gas
to be delivered at a specific flow rate and pressure.
A variety of calibration gas canisters are available from
Nuvair, with compatible Flow Restrictor/ Regulator
assemblies to regulate the gas.
10.0 Troubleshooting
SYMPTOM REASON SOLUTION
Battery symbol Low Battery Change the battery
No display
Switched off
Bad connection
Low Battery
Switch on
Check display/ battery connection
Change the battery
Reading erratic
Pressure on sensor
Radio transmission
Sensor old or faulty
Condensation on sensor.
Check flow
Move unit away
Change sensor
Dry in air
Display segments missing Display faulty Return to dealer
Reading drifts Rapid temperature change Stabilize temperature & recalibrate
Flow Restrictor/
Regulator
Assembly
Nuvair
Calibration Gas
Specs:
CO 10 ppm
CO2 1000 ppm
Nitrogen Balance

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12.0 Relay Output Schematics
4-20mA Connections: The relay output uses a special “Mini Jack” plug that can be
purchased separately from Nuvair. Insert the plug into the output jack. Connections diagram
below for additional wiring.
The plug should be connected or disconnected when the instrument is switched off, or
the instrument will automatically switch off.
Open Collector Connections:

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Appendix
Analyzer Specifications
Resolution: 0 – 2500 (50ppm) CO2
Alarm Set Point: What ever ppm desired of CO2
Display Accuracy: +/- 5%
Sensor Type: NDIR non-dispersive infra red
Expected Sensor Life, Room Air: 2 Years
Power: 9 Volt Battery or optional 110/230v electric
Response Time: Less Than 50 Seconds to 90% of Final Value
Stabilization Time: 10 Minutes Max Accuracy7
Operating Temperature: 41 to 104°F (5 to 40°C)- Will work outside this range
with decreased accuracy.
Storage Temperature: 14 to 140°F (-10 to 60°C)
Operating Pressure: Not to Exceed 1 Atmosphere Absolute (0 P.S.I.)
Humidity: 15-90% Continuous 0-99% Intermittent
Note: All specifications are at ambient / sea level, 77°F / 25°C and subject to change without notice

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NUVAIR Pro CO2TM Warranty
NUVAIR extends a limited warranty, which warrants the Pro CO2TM to be free from defects in materials
and workmanship under normal use and service for a limited period. The Pro CO2is warranted
according to the pro-rated terms as set forth below. This warranty is not transferable.
NUVAIR will, at it’s discretion and according to the terms as set forth within, replace or repair any
materials which fail under normal use and service and do not exhibit any signs of improper maintenance,
misuse, accident, alteration, weather damage, tampering, or use for any other than the intended purpose.
Determination of failure is the responsibility of NUVAIR, which will work together with the customer to
adequately address warranty issues. When any materials are repaired or replaced during the warranty
period, they are warranted only for the remainder of the original warranty period. This warranty shall be
void and NUVAIR shall have no responsibility to repair or replace damaged materials resulting directly or
indirectly from the use of repair or replacement parts not approved by NUVAIR.
Terms:
NUVAIR warrants the Pro CO2to be free from defects in material and workmanship for a period of twelve
(12) months from date of purchase. The warranty covers parts and labor.
A warranty registration card, supplied with system documentation, must be filled out and submitted to
NUVAIR for the warranty to be registered. If the warranty registration card is not received within ten (10)
days of purchase, the warranty will begin with the date of manufacture by NUVAIR.
Maintenance Items:
Any materials which are consumed, or otherwise rendered not warrantable due to processes applied to
them, are considered expendable and are not covered under the terms of this policy. This includes
batteries.
Return Policy:
Application for warranty service can be made by contacting NUVAIR during regular business hours and
requesting a Return Material Authorization number. Materials that are found to be defective must be
shipped, freight pre-paid, to the NUVAIR office in Oxnard, California. Upon inspection and determination
of failure, NUVAIR shall exercise its options under the terms of this policy. Warranty serviced materials
will be returned to the customer via NUVAIR’s preferred shipping method, at NUVAIR’s expense. Any
expedited return shipping arrangements to be made at customer’s expense must be specified in
advance.
Limitation of Warranty and Liability:
Repair, replacement or refund in the manner and within the time provided shall constitute NUVAIR’S sole
liability and the Purchaser’s exclusive remedy resulting from any nonconformity or defect. NUVAIR shall
not in any event be liable for any damages, whether based on contract, warranty, negligence, strict
liability or otherwise, including without limitation any consequential, incidental or special damages, arising
with respect to the equipment or its failure to operate, even if NUVAIR has been advised of the possibility
thereof. NUVAIR makes no other warranty or representation of any kind, except that of title, and all other
warranties, express or implied, including warranties of merchantability and fitness for a particular purpose,
are hereby expressly disclaimed. No salesman or other representative of NUVAIR has authority to make
any warranties.

Nuvair™ 2012 All Rights Reserved
Phone [phone]
Fax [phone]
2949 West 5th Street
Oxnard, CA 93030
USA
Email : [email protected]m
Web : www.nuvair.com
Revision 0212