Nuvair Pro He Alarm Helium Analyzer User Manual

Pro He Alarm Helium Analyzer

User Manual
Pro He Alarm
Helium Analyzer

Pro He Alarm Helium Analyzer

If you have any questions on this equipment please contact Technical Support at:

Nuvair 1600 Beacon Place Oxnard, CA 93033

Phone: +1 805 815 4044
Fax: + 805 486 0900
Email: info@nuvair.com
Hours: Monday through Friday 8:00 AM to 5:00 PM PST USA

Warning

This User 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.

Nuvair

Page 2

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Pro He Alarm Helium Analyzer

1.0 Introduction

This manual will assist you in the proper set-up, operation and maintenance of the Pro HE Helium 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

2.0 System Description

The Pro HE Helium Analyzer measures helium (He) levels in gases in the range of 0 to 100% of volume with a.1% resolution. It can be used to measure the He content in all breathing gas mixes. The Analyzer is designed to verify helium concentration 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.

Helium is a colorless, odorless, tasteless gas that will not support life. Exposure to Helium can lead to unconsciousness and death.

The Analyzer is battery powered or 110/230V and includes an internally mounted sensor with audible & visual 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 is self calibrating and ready for use after powering on. Certified calibration gas should be used periodically to confirm the accuracy of the analyzer sensor and electronics are working properly.

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 Helium exposure levels directed at the Analyzer sensor may damage the sensor.

2.0 Description

2.1. Controls

2.2. Display

2.3. Alarm

The Analyzer includes an audible and visual alarm that is activated when the Sensor reaches the alarm set points which are user programmed. The alarm will not clear until the concentration of He drops below user programmed set points.

2.4. Sensor

The Analyzer uses a “Thermal Conductive” Helium sensor to measure He content in gases. The Sensor is designed for use at atmospheric pressure (0 P.S.I.). The gas mixture to be analyzed must be regulated to .5-1.0 LPM, and any potential for pressure or vacuum must be avoided.

2.5. Batteries

The Pro He rechargeable model uses a “110/230V” charger with a Lithium Polymer rechargeable battery. A fully charged battery should last up to 24 hours. Recharge takes about 4 hours. DO NOT LEAVE UNIT UNATTENDED WHILE CHARGING and UNPLUG ONCE CHARGED. The battery is located inside the Analyzer and is user- replaceable. Lithium battery models should have battery 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.

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 Oring. 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.

3.0 Calibration

Analyzer calibration must be verified on a weekly basis. Improper calibration may result  in an incorrect reading, exposing the user to dangerous levels of Helium. Exposure to  Helium 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 He calibration 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.

Should the unit begin to display readings other than the helium percentage of the calibration test  gas, perform a Factory Reset as outlined in Section 7.

Pro He Alarm Helium Analyzer

4.0 Operation

Prior to each Analyzer use:

1. Turn unit on (hold on/off for 3 sec) and monitor Display for low battery warning. Charge battery immediately if warning appears. The display will show “On”, “(version of software)  and then “Att” and then display the current He 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 two Threshold Alarm Values set, Full Scale Value, Auto shutdown time, and end.

b. Adjust Alarm values at this time if needed see “4.2”

3. Confirm 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.

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.

The Pro HE 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 He test gas for confirming calibration. See kits in the addendum for  more information.

Testing Gas must contain a known amount of Helium for calibration test to succeed.

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:

o AL 1 Low alarm point expressed in ppm of Helium concentration

o AL 2 High alarm point expressed in ppm of Helium concentration

o FSC Value expressed in ppm of Helium concentration corresponding to the current output full scale value (20mA). 4mA always correspond to 1999 ppm He concentration.

o tOn Time on value- This is the time the analyzer will stay on before auto powering  off.

At the end of the programming procedure the display will show “End” and the instrument will display the Helium content in the gas mix.

Below are the actual screen views of each of the modes. (*Calib button say as adjust)

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 alarm percentage. Default is 100% and if either alarm is  set at 100% the alarm will be excluded. After a second the display will show the value  of “AL1” He % 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 He % 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” if desired or leave at 100% to  exclude alarm.

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 He Analyzer 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 100. This is the Helium concentration corresponding to 20 mA on the analog output.  4mA is the value at 0% of Helium concentration. 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 He 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 “tOn” programming view.

4.5.Auto Switch Off Delay Time (tOn)

In this setting it is possible to change the auto off delay time of the Analyzer. The display will show 180 seconds default, We manually change this to 600 seconds before shipping. This value is changed by the same procedure as the Alarm settings, follow procedure above in 4.3. This setting can be adjusted from 0 to 1999 seconds. To keep the instrument from  turning off the Analyzer time should be set to “000” seconds. To complete your entry and  move to the end screen press the power on/off button when programming is complete.

The analyzer will shut off after the set time value is reached that is programmed into the analyzer. If you are using the analyzer for continuous blending, set the value to “000” to

prevent the analyzer from shutting off automatically. With the analyzer off inaccurate gas  mixture could take place and lead to a death. Always analyze mixed gas before you dive.

5.0. Threshold Alarms

The He analyzer will alarm once the gas goes over the alarm set point (AL1 or AL2) .  Once the gas is above the AL1 or AL2 set point the analyzer will go into alarm mode until  the gas value drops below the set point during the gas analyzation. Should the Helium gas trip the 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 He Analyzer will remain in alarm mode until the analyzed value reads below 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.

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 He Analyzer to the factory settings, or the  displayed Helium Percentage does not correlate with the content of your calibration test  gas, follow this procedure to reset the unit:

1. Power on the unit by holding down the On/Off button until the display turns on.
2. Wait until the display has stabilized and the unit is ready to analyze.
3. Record any alarm levels or Auto Off time that are programmed and retain for later use.  Cycle back to the home screen.
4. Press the On/Off and Adjust buttons at the same time and hold until the display  changes.
5. Release the buttons. The unit should now be reset.
6. Test the Analyzer with calibrated test gas to ensure accuracy. If the analyzer still does  not display an accurate reading, contact Nuvair for repair or replacement of the unit.
7. If the analyzer is now accurate, you may now re-program any alarms and Auto Off  time.

In case of reset, the instrument will delete all the alarms settings and the Auto Off time value. Before using the instrument after a reset, it may be necessary to program again

the alarm values and the Auto Off value. You should confirm your calibration with a certified testing gas immediately after a reset before using.

Nuvair Page 13 www.nuvair.com

Pro He Alarm Helium Analyzer

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. The Lithium Polymer battery may present a fire hazard if the battery gets  wet.

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.

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 or damaged Battery properly, according to local regulations. The following pictures illustrate the steps required to replace the batteries in the Analyzer.

“LB” Model: Remove four nuts and pull out aluminum plate. Under this plate is the Lithium  Polymer battery. Contact Nuvair for a replacement battery.

8.3. Sensor Replacement

Should the sensor become faulty, contact Nuvair for repair or replacement.

Replace sensor when the Helium analyzer is unable to correctly analyze Helium gas. The  use of a damaged sensor may cause dangerous analysis and lead to death. Wrong Helium analysis may lead to death. Always contact Nuvair for repairs. Do not use any  other helium sensor brands for replacement.

9.0 Spares

9.1.Calibration Equipment

Calibration check requires certified He calibration 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.

9.2.110V/230V Charger for Lithium Battery powered Pro He Analyzer VERY IMPORTANT YOU ONLY USE Nuvair SUPPLIED MODEL: H00740003-XX-W1 USING ANY OTHER CHARGER COULD CAUSE A FIRE.

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
Condensation on sensor.

|

Check flow
Move unit away
Return to Dealer
Dry in air

Display segments missing

|

Display faulty

|

Return to dealer

Reading drifts

|

Rapid temperature change

|

 Stabilize temperature & recalibrate

Nuvair Page 17

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Pro He Alarm Helium Analyzer

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:

Appendix

Analyzer Specifications

Resolution: 0 – 100% Helium in air or nitrogen or oxygen
Alarm Set Point: Whatever % desired of He
Display Accuracy: +/- 2%
Sensor Type: Thermal Conductive Technology
Expected Sensor Life, Room Air: 2 Years
Power: 7.4V Li, or optional 110/230v electric
Battery Life: 6 hrs+ with Lithium battery
Response Time: Less than 10 Seconds to 90% of Final Value
Stabilization Time: 10 Minutes Max Accuracy
Operating Temperature: 41 to 104°F (5 to 40°C)- Will work outside this range with decreased accuracy.
Storage Temperature: 5 to 122°F (-15 to 50°C)
Operating Pressure: Not to Exceed 1 Atmosphere Absolute (0 psi)
Humidity: 0-90% Non Condensing. Don’t allow moisture to build up on the sensing surface.

Note: All specifications are at ambient / sea level, 77°F / 25°C and subject to change without notice Charger Specifications for Lithium Polymer rechargeable battery Models

Features:

• 110V-240V AC input for worldwide power support
• Constant charging current for faster charging
• Stabilized output, low ripple
• Safety Protection:
• Over Voltage Protection
• Short Circuit Protection
• Output reverse input protection
• The charger will cut off automatically if battery is fully charged (1/10C) and indicated by LED In charging mode RED LED Battery Full GREEN LED

Specifications:

Input: AC 100-240V 50-60Hz
Output: DC 8.1V
Charging Current: 300mA

WARNING:

• Charge only Nuvair 7.4V Li-ion rechargeable battery pack with this charger
• Don’t expose the product to rain or humidity to prevent from electric shock
• It is normal for the product to get slightly warm when in use
• Keep out of reach of children
• Don’t touch any part of the product during charging to prevent electric shock.

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Pro He Alarm Helium Analyzer

Nuvair Pro HE Warranty

Nuvair extends a limited warranty, which warrants the Pro HE to be free from defects in materials and  workmanship under normal use and service for a limited period. The Pro He is warranted according to  the 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 He to 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 Page 20

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Pro He Alarm Helium Analyzer

Notes: Nuvair Page 21 www.nuvair.com

Phone +1 805 815 4044

Fax +1 805 486 0900

1600 Beacon Place

Oxnard, CA 93033

USA

info@nuvair.com

www.nuvair.com 

Revision 05.21

References

• NUVAIR: Breathing Air Systems, Industrial Compressors, Nitrox

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