Nuvair Pro H2O Alarm User manual

Operation Manual
Pro H2O AlarmTM
Moisture Analyzer
Rev. 08.17

2
If you have any questions on this equipment please contact Technical Support at:
Nuvair
1600 Beacon Place
Oxnard, CA 93033
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
4.5 PrE Pressure Value……………………………… ………………………… 11
5.0Calibration …………………………………………………………………………… 12
6.0Threshold Alarms .............................................................................................. 12
7.0 Powering Off …………………………………………………………………………12
8.0 Factory Reset ………………………………………………………………………..12
9.0 Maintenance………………………………………………………………………… 13
9.1Analyzer Care …………………………………………………….................13
9.2Battery Replacement …………………………………………………..........13
9.3Sensor Replacement …………………………………………….................14
10.0 Spares and Accessories …………………………………………………………14
10.1 Calibration Equipment.……………………………………….................14
11.0 Troubleshooting...............................................................................................14
12.0 Relay Output Schematics………………………………………………………… 15
13.0 Analyzer Specifications ………………………………………………............... 16
Warranty …………………….…………………………………………….……... 17

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1.0Introduction
This manual will assist you in the proper set-up, operation and maintenance of the Pro H2OTM
Moisture 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 H2OTM Moisture Analyzer measures water (H2O) levels in gases in the range of 0 to
1999 parts per million (ppm). It can be used to measure the water content in gas mixes that will
increase with humidity and moisture saturation of filters. The Analyzer is designed to verify H2O
concentration in stored gas cylinders as well as to monitor continuous gas flow from a
compressor. The Analyzer is a water and impact resistant unit compatible with outdoor and
marine environments.
As soon as the analyzer alarm is tripped shut down your compressor system
and replace all of your filter cartridges in the compressor system.
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 H2O 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 user
programmed level. The alarm will not clear until the concentration of Moisture drops below user
programmed level.
As soon as the analyzer alarm is tripped shut down your compressor system
and replace all of your filter cartridges in the compressor system.
2.4.Sensor
The Analyzer uses a Capacitive H2O Sensor to measure moisture content in gases. The
Sensor is disposable and user-replaceable, with a life expectancy of 60 months plus 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.
Digital
Display
On/Off Button
Low Battery
Indication
Adjust Button
Relay
Output
Program Button
Moisture Reading
0 – 1999 ppm
In 1 ppm
increments
Moisture Reading
0 – 100%
In .1 % 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 of pressure maximum. Nuvair offers flow
restrictors to accomplish this task. See appendix.
3.0Calibration
Analyzer calibration must be verified on a daily basis. Improper calibration may result in
an incorrect reading, delivering inaccurate levels of moisture being monitored.
This Analyzer must always be checked with 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 will deliver inaccurate moisture readings.
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 daily basis. Breathing gas applications require the use of a certified
calibration gas with no moisture concentration 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) To turn the unit on, hold the On/Off button until the display show “On”. Monitor the display
for low battery warning. Replace battery immediately if warning appears. Once fully
cycled the screen should read “000”.
2) The display will cycle through a couple screens and finish with the current relative
humidity percentage of moisture being sensed.
3) At this time the Alarm function should be activated by holding the “On/Off” and
“Prog” buttons until the display flashes ALN, then ON. The alarm function is active
when a triangle is present in the upper left corner of the display.
4) Cycle through the current alarm settings of the analyzer.
a. Hold down the “Prog” button for 2 seconds then use the “On/Off” button to cycle
through the 1st Alarm Value, 2nd Alarm Value, Full Scale Value, and Pressure
Value. The “End” screen will display for a couple seconds before going back to
the current percentage of moisture.
b. Adjust Alarm values at this time if needed see “4.2 programing”
4) Pressing the Adjust key it is displayed the Temperature value (°C) (TeM).
4.1) Pressing again the ADJUST key PPM in volume (PPM) is displayed.
4.2) Pressing again the ADJUST key Absolute humidity (gr/m3) (AbH) is displayed. The
absolute humidity is the mass of water vapor in a particular volume of dry air
4.3) Pressing again the ADJUST key Dew Point (°C) (td) is displayed.
4.4) Pressing again the ADJUST key Mixing ratio (gr/Kg) (Mr) is displayed. The mixing
ratio is the mass of water vapor in a particular mass of dry air.
4.5) Pressing again the ADJUST key Volt output of the battery (Bat) is displayed.
4.6) Pressing again the ADJUST key zero Offset value (OFS) is displayed. This value is 0
if the analyzer is not adjusted in dry gas. If the instrument was adjusted in 0% RH, OFS is
the value of the relative humidity at the zeroing time. During the OFS visualization,
pressing at the same time for three seconds ON/OFF and ADJUST key, the instrument
will lose the 0 Adjustment, and the OFS value will go to 0.
4.7) Pressing again the ADJUST key Relative humidity value is displayed. (Home
Screen)
5) Check Calibration of Analyzer using “Calibrated Test Gas”
Gas, even under moderate pressures, can cause extreme bodily harm. Never allow any
gas stream to be directed at any part of your body.
Low Battery
Indication
Ready For
Gas Analyzing

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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.
It is very important that the calibration take place at atmospheric pressure (1 bar) and
with calibrated test gas that has no moisture in it.
The Pro H2OTM can be used to monitor a regulated gas sample flow, the contents of a gas
cylinder, or the flow from a regulator:
•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 gas testing kits see addendum for more information.
Testing Gas must not contain Moisture 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 30
Seconds for Display
Reading to Stabilize
Step 4. Record
Reading while Gas is
Flowing
Flow Restrictor/
Regulator
Assembly
Moisture Free
Calibration Gas
Canister

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4.2.Programming Procedures
Keep the “Pro” 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 First alarm point expressed in ppm of Moisture in concentration
oAL 2 Second alarm point expressed in ppm of Moisture in concentration
oFSC Value expressed in ppm of moisture in concentration corresponding to the
current output full scale value 4-20mA output if available.
oPrE ambient pressure expressed in mBar. Default value is 1013
At the end of the programming procedure the display will show “End” and the instrument
will display the moisture in percentage of relative humidity content in the gas mix.
Below are the actual screen views of each of the modes.
Program
First Alarm
Second Alarm
Full Scale Value
Pressure Value of Sensor
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 first alarm point. After a second the display will show the
value of “AL1” H2O ppm current setting. Default is 1999.
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 H2O ppm 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” H2O ppm 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 H2O Analyzer goes to “FSC” view so that you
can change the analog full scale value. The FSC value sets the span of the
instrument for the 4-20 mA output, if available. The value is related to PPM value.
It is not necessary to modify this value which is factory set. 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 CO
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)
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 “PrE” programming view. To continue pass this to the end
press the On/Off button until the “End” screen appears.
4.5.Ambient Pressure Value (PrE)
After the “FSC” is set the Pro H2O Analyzer goes to “PrE”, this is the Ambient Pressure value,
measured in mBar. Default is 1013 It is not necessary to modify this value. The display will
have a blinking digit which shows the current cursor position.
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. Use the
On/Off button to cycle through the various settings until you reach the PrE” screen.
The 4th digit value will blink and is the first value that can be changed.
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 PrE value, press the “On/Off” button. You will
then automatically jump to “End” programming view.

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5.0 Calibration in 0% humidity dry gas
It is possible to calibrate the humidity sensor with a certified dry GAS containing 0% of
relative humidity. Attach dry gas to flow inlet of analyser, wait for at least 1 minute and
press at the same time ON/OFF and Adjust button. You will see on display CAL Att and
the value will be 0, and on the display there will be an up arrow symbol.
For coming back the original factory calibration, follow the Reset procedure stated below
in 8.0. The instrument will forget the last calibration operation once reset.
For resetting the instrument to the original factory settings (rES), power on the instrument
pressing at the same time for few seconds the ON/OFF and the Adjust button.
Calibration gas must be certified Moisture free for accurately calibrating the moisture
analyzer.
As soon as the analyzer alarm is tripped shut down your compressor system
and replace all of your filter cartridges in the compressor system.
6.0 Threshold Alarms
The Alarm function must be activated every time the unit is powered on. To activate, wait
until the unit has cycled through its startup and is steadily displaying the analyzer’s
reading. Press and hold the On/Off and Prog buttons simultaneously until the display
flashes ALN, then ON. The alarm function is active when a triangle is present in the
upper left of the analyzer display.
Should the Moisture content exceed the threshold alarms (AL1 or AL2) the instrument
will go into alarm mode and will activate the (optional) relays output (open collector max
100mA) and internal buzzer. The display will show the trespassed alarm and actual
measured value. To stop the audible alarm, press any key. In this event the Pro H2O
Analyzer will remain in alarm mode until the analyzed value goes below the alarm.
The relay output typically is used to shut down the compressor or activate external
optional alarms. 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.
7.0 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.
8.0 Factory Reset
In case it is necessary to reset the Pro H2O Analyzer 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.
Resetting the Analyzer will result in all user programmed alarms and calibration being
erased and set at factory defaults.

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9.0. Maintenance
9.1. 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.
•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.
9.2. 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.
5.0.
9.3.Sensor Replacement
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

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The Pro H2O sensor is a Capacitive sensor element with good dynamic performance
long term stability and highly resistant to dew formation. The sensor should never need
to be replaced during the life of the instrument. If damage occurs send the analyzer back
to Nuvair for inspection and Nuvair will determine if the unit can be repaired or needs to
be replaced.
10.0 Spares and Accessories
10.1. Calibration Equipment
Calibration requires certified calibration gas to be free of
any moisture and delivered at a specific flow rate and
pressure.
Nuvair offers a calibration gas canister with a compatible
flow restrictor and regulator assembly to regulate the gas
for proper calibration.
11.0 Troubleshooting
12.0 Relay Output Schematics
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

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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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13.0 Analyzer Specifications
Relative Humidity Range: 0 – 100% relative humidity
Resolution: 0.5% relative humidity
Display Accuracy: ± 2%(10 to 40 °C & 10 to 90 %rh) (±97 mg/m3 at 0°C)
additional error temperature: ± 0.1 % rh/K for less than 10 °C and greater than 40 °C
additional error rh: ±0.25% rh/%rh for less than 10% rh and greater than 90% rh
Relative Humidity Sensor Type: Capacitive
Expected Sensor Life, Room Air: 5+ Years
Power: (1) 9 Volt Battery
Response Time:
Stabilization Time:
Operating Temperature: -4 to 176°F (-20 to 80°C) – Will work outside this range with
decreased accuracy.
Storage Temperature:
Operating Pressure: Not to Exceed 1 Atmosphere Absolute (0 P.S.I.)
Note: All specifications are at ambient / sea level, 77°F / 25°C

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NUVAIR Pro H2OTM Warranty
NUVAIR extends a limited warranty, which warrants the Pro H2OTM to be free from defects in materials
and workmanship under normal use and service for a limited period. The Pro H2Ois 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 H2Oto 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.

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Notes:

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Nuvair™
Phone [phone]
Fax [phone]
1600 Beacon Place
Oxnard, CA 93036
USA
Email : [email protected]m
Web : www.nuvair.com
Revision 08.14