PureAire Monitoring Systems 99019 User manual

PureAire Monitoring Systems
O2Deficiency Sample Draw Monitors
Instruction Manual
For models
US (99019/99029/99092)
Intl (99129/99130)
Water Resistant (99118)
Class I EXR (99020/99099)
Class II EXR (99045)
PureAire Monitoring Systems, Inc.
1140 Ensell Road
Lake Zurich, Illinois 60047
Phone: [phone]
Fax: [phone]
Toll-Free: [phone]
24/7 Emergency: [phone]
Pureairemonitoring.com
Rev 5.03, August 2023

© 2023 PureAire Monitoring Systems, Inc.
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Welcome to PureAire Monitoring Systems
I would like to thank you for investing in our continuous life safety and process control
toxic gas monitoring systems.
PureAire offers an unbeatable combination of experience and innovation in solving the
safety and environmental needs of our customers. We can provide small systems of a few
points, to a total multi-point turnkey computerized package.
PureAire’s proprietary sensor cell technology and state-of-the-art electronics are designed
to interface with the latest distributive or PLC based control systems. We believe that our
experience, innovative products, and commitment to service will satisfy your specific
monitoring needs now, and in the future.
Our growth is a result of our total commitment to supporting our customers. We are
available 24 hours a day, 7 days a week to help you when you need us. Our 24-hour
Emergency phone number is [phone]. We can provide field service
recommendations, preventative maintenance programs and training to your technicians in
the operation of our equipment. Our goal is to provide the best after-sales service and
support in the industry. That is just one way PureAire takes that extra step to ensure your
complete satisfaction.
Thank you again for investing in PureAire Monitoring Systems for your monitoring needs
and I am proud to welcome you to our family of valued and satisfied customers.
Sincerely,
Albert A. Carrino
President

© 2023 PureAire Monitoring Systems, Inc.
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PLEASE READ BEFORE INSTALLATION
The following environmental conditions WILL DAMAGE the
Oxygen Monitor
1. The PureAire Monitor requires 24 VDC regulated power ONLY.
DO NOT connect the monitor to >24 VDC, or ANY AC Voltage.
2. DO NOT power the monitor without the sensor attached to the
main assembly. DO NOT disconnect/reconnect sensor while
monitor is powered.
3. Each sensor cell is matched specifically to each monitor. NEVER
exchange sensors and monitors.
4. Flows rates above 500 cc/min (0.5 LPM) may lead to inaccurate
readings. Flow rates above 1 LPM will cool the sensor and yield
inaccurate readings.
5. Calibration gases should be blends consisting of Oxygen and
Nitrogen ONLY. DO NOT expose the monitor to any combustible
gas (Methane, Hydrogen, etc.). Combustible gas exposure will
quickly damage the cell.
6. NEVER expose the sensing element to compounds consisting of
Silicone, Freon, or corrosive compounds. Exposure will quickly,
irreversibly damage the cell causing an extreme loss in sensitivity.
7. When using the monitor, DO NOT expose the oxygen sensor
directly to a water stream. In areas requiring wash downs, cover
and protect the monitor and power supply. Contact PureAire for
details on waterproof enclosures.
The Password for entering the menus is 557.

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Table of Contents
PureAire Monitoring Systems O2Deficiency Sample Draw Monitors .......................................... 1
1: Introduction................................................................................................................................. 7
1.1 Key Features..................................................................................................................... 7
1.1.1 Long Life Zirconium Oxide O2Sensor..................................................................... 7
1.1.2 Smart Electronics ...................................................................................................... 8
1.1.3 Sensor Adjustment.................................................................................................... 8
1.1.4 Factory Reset ............................................................................................................ 8
1.1.5 AutoSpan Function ................................................................................................... 8
1.2 Component Identification................................................................................................. 8
1.2.1 Sample Draw Oxygen Monitors ............................................................................... 8
1.2.2 Sample Draw Oxygen Monitors (Hornless) ............................................................. 9
1.2.3 Sample Draw Oxygen Monitors (Pumpless) .......................................................... 10
1.2.4 Water Resistant Sample Draw Monitors................................................................. 10
1.2.5 Class I Explosion Proof Monitor ............................................................................ 11
1.2.6 Class II Explosion Proof Monitor ........................................................................... 11
1.2.7 Particulate Filter Assembly..................................................................................... 12
1.2.8 Water/Humidity Filter Assembly............................................................................ 12
1.2.9 Joystick Board......................................................................................................... 13
1.2.10 Relay Board ............................................................................................................ 13
2: Specifications............................................................................................................................ 14
2.1 Performance Specifications............................................................................................ 14
2.2 Operating Conditions ..................................................................................................... 14
2.2.1 Sample Draw Oxygen Detector .............................................................................. 14
2.2.2 Water Resistant Sample Draw Oxygen Detector.................................................... 14
2.2.3 Class I Explosion Proof Oxygen Detector.............................................................. 14
2.2.4 Class II Explosion Proof Oxygen Detector............................................................. 14
2.3 Gas Detection System .................................................................................................... 15
2.4 Electrical Requirements ................................................................................................. 15
2.5 Physical Characteristics.................................................................................................. 15
2.5.1 Sample Draw Oxygen Detector .............................................................................. 15
2.5.2 Water Resistant Sample Draw Oxygen Detector.................................................... 15
2.5.3 Class I Explosion Proof Oxygen Detector.............................................................. 15
2.5.4 Class II Explosion Proof Oxygen Detector............................................................. 15

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2.6 Default Factory Settings................................................................................................. 16
3: Installation ................................................................................................................................ 17
3.1 Site Requirements .......................................................................................................... 17
3.2 Mounting ........................................................................................................................ 18
3.2.1 Sample Draw Monitor Enclosure Dimensions ....................................................... 18
3.2.2 Water-Resistant Sample Draw Monitor Enclosure Dimensions............................. 18
3.2.3 Explosion-Proof Class I Enclosure Dimensions ..................................................... 19
3.2.4 Explosion-Proof Class II Enclosure Dimensions.................................................... 19
3.2.5 Sample Inlet Filter................................................................................................... 20
3.2.5.1 Dust & Particulate Filter ..................................................................................... 20
3.2.5.2 Humidity/Water Filter......................................................................................... 21
3.2.6 Installation Guidance .............................................................................................. 21
3.3 Wiring............................................................................................................................. 22
3.3.1 Power to Monitor .................................................................................................... 22
3.3.2 Relay Board Connections ....................................................................................... 22
4: Normal Operation ..................................................................................................................... 23
4.1 Signal Outputs................................................................................................................ 23
4.2 Instrument Faults............................................................................................................ 23
4.3 Routine Maintenance Schedule...................................................................................... 23
4.4 Loss of Power Indication................................................................................................ 24
4.5 Alarm Reset.................................................................................................................... 24
5: Monitor Programming .............................................................................................................. 25
5.1 Joystick Operation.......................................................................................................... 25
5.2 Overall Program Flowchart............................................................................................ 26
5.2.1 Top Level Menu Navigation................................................................................... 26
5.3 Entering Password.......................................................................................................... 27
5.4 Changing the User Password ......................................................................................... 27
5.5 Setting 4-20mA Loop..................................................................................................... 28
5.6 Setting Relay Formats .................................................................................................... 28
5.7 Setting Alarm Polarity.................................................................................................... 29
5.8 Setting Alarm Latching .................................................................................................. 30
5.9 Sensor Adjustment Menus ............................................................................................. 31
5.10 AutoSpan Menus ........................................................................................................ 32
5.11 Factory Reset Menus .................................................................................................. 33

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5.12 Setting Alarm Hysteresis ............................................................................................ 34
5.12.1 Hysteresis................................................................................................................ 34
5.13 Setting Alarm Thresholds........................................................................................... 35
5.14 Setting Alarm Delay ................................................................................................... 36
6: Maintenance & Sensor Verification ......................................................................................... 37
6.1 Setting Alarm Delay....................................................................................................... 37
6.1.1 Sensor Verification Gas .......................................................................................... 37
6.1.2 Sensor Verification Equipment............................................................................... 37
6.2 Sensor Functionality Verification Procedure ................................................................. 37
6.3 Ambient Oxygen Level Verification.............................................................................. 38
6.4 AutoAdjust Functions .................................................................................................... 39
6.4.1 Monitor AutoSpan .................................................................................................. 39
6.4.2 Reset AutoCal to Factory Settings.......................................................................... 40
6.5 Manual Monitor Span Adjustment................................................................................. 40

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1: Introduction
The Air Check O2Deficiency Monitor is a compact and efficient system for continuous oxygen
level monitoring in confined spaces or areas with inert gases. Unaffected by fluctuating
temperature or humidity levels, the device’s robust zirconium sensor provides accurate and
stable oxygen readings. Suitable for both indoor and outdoor use, the monitor is factory
calibrated against NIST standards and carries UL, CUL, and Ce certifications.
The system’s centerpiece is a durable zirconium sensor that reacts quickly to low oxygen levels,
offering precise measurements across a broad temperature and humidity spectrum. Designed for
minimal maintenance, this sensor is expected to work seamlessly for 10+ years, and unlike
disposable sensors, it eliminates the need for frequent calibration, with no zero or span pots,
saving significant maintenance time and costs.
Each Air Check O2 Sample Draw Monitor system consists of a resilient zirconium oxide sensor
cell and a three-wire transmitter. The monitor, capable of operating as a stand-alone gas detector,
can also be incorporated with PureAire’s single or multi-point controllers, or a comprehensive
centralized control system. Importantly, the performance and accuracy of the monitor remain
consistent irrespective of the prevailing weather or temperature conditions.
A defining aspect of the monitor is its Sensor Housing Assembly, designed to facilitate pass-
through or internally drawn samples. Included as a standard feature is a sample pump, although it
is optional, capable of drawing at a rate of 250 ccs/min or 0.25 LPM. Similarly, the audio alarm,
while standard, is optional and can be tailored as per your needs.
The sample pump has a maximum draw distance of 100 ft, providing flexibility in monitoring
locations. The electrical components of the monitor are securely housed in a standard NEMA 3
enclosure. Optional upgrades include an IP65 water-resistant enclosure, or Class I or Class II
explosion-proof housing, depending on your specific requirements. This manual will offer
detailed instructions on the installation, operation, and maintenance of the Air Check O2Sample
Draw Monitor.
1.1 Key Features
The Air Check O2Deficiency Monitor is designed with an array of innovative features that
facilitate ease of use and efficient operation. These unique characteristics have been thoughtfully
incorporated to streamline the installation process, optimize daily functionality, and minimize
maintenance needs. By fusing cutting-edge technology with user-centric design, the monitor
delivers reliable performance while ensuring a simplified user experience.
1.1.1 Long Life Zirconium Oxide O2Sensor
The Air Check O2Deficiency Monitor features a durable zirconium oxide O2sensor with over 10
years of continuous operation life. Uniquely designed by PureAire, this sensor can accurately
detect low oxygen levels in confined spaces and process tools without needing a reference gas,
setting it apart from conventional concentration O2cells.

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1.1.2 Smart Electronics
The monitor integrates a specialized electronic circuit to continuously oversee the sensor’s
operation. This advanced circuitry can promptly identify any sensor degradation or failure,
alerting the user to any sensor faults or electrical issues that might disrupt surveillance via the
standard mA signal output or the optional fault relay.
1.1.3 Sensor Adjustment
The device uses a stable zirconium oxide sensor that requires minimal adjustment.
Environmental factors like changes in barometric pressure, temperature, and humidity do not
affect the sensor’s performance. It can easily visually verify the Earth’s 20.9% oxygen level
under ambient conditions, without the need for any zero or span pot adjustments. Periodic
nitrogen testing is all that’s needed to verify the cell’s response to low oxygen levels.
1.1.4 Factory Reset
Introduced in the Version 5.0 update, the factory reset feature allows users to return the monitor
to its original state as per the factory calibration certificate, enhancing the usability and
convenience of the system.
1.1.5 AutoSpan Function
Also added in the Version 5.0 update, the AutoSpan function enables automatic span adjustment
to 20.9% oxygen, eliminating the need for manual adjustments and further simplifying the user’s
experience.
Further details about the factory reset and AutoSpan function will be provided later in the
manual.
1.2 Component Identification
1.2.1 Sample Draw Oxygen Monitors

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1.2.2 Sample Draw Oxygen Monitors (Hornless)

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1.2.3 Sample Draw Oxygen Monitors (Pumpless)
1.2.4 Water Resistant Sample Draw Monitors

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1.2.5 Class I Explosion Proof Monitor
1.2.6 Class II Explosion Proof Monitor

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1.2.7 Particulate Filter Assembly
1.2.8 Water/Humidity Filter Assembly

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1.2.9 Joystick Board
1.2.10 Relay Board
NC: Normally Closed
C: Common
NO: Normally Open

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2: Specifications
NOTE: For our continual product improvement, all specifications are subject to change without notice
2.1 Performance Specifications
Sensor Type: Long-Life Zirconium Oxide Sensor Cell. 0-25%/0-30%/0-95%
Response Time: Swift response within 1 second to any O2 level change.
Accuracy: Delivers ±0.2% O2 accuracy. (±1% of full range)
Fault Indicators: Loss of VDC power (analog signal drops to 0 mA).
Sensor cell failure: Fault relay activated.
Operating Cond.: -40° to 134°F (-40° to 55°C)
0 to 95% RH (Standard)
Up to 100% RH, Water Resistant Enclosure, w/o horn (99118 only)
Class 1, Div 1 & 2, Groups B, C, D, Zones 1 & 2, Groups IIB+H2, IIA
(99020/99099)
Class 2, Div 1 & 2, Groups E, F, G, Class III, Type 4 & 4X. ATEX, IEC Ex, Ex
d IIC, IP66 (99045)
UL/CUL Listing: Measuring Equipment E363306
Ce: EN 61000-3-2:2006 EMC, EN 61000-3-3:2008 EMC, EN61010-1-3-2013 LVD
2.2 Operating Conditions
2.2.1 Sample Draw Oxygen Detector
Product Lines: Standard
Temperature: -40° to 40°C (-40° to 104°F); Consult PureAire for extended ranges.
Rel. Humidity: 0 to 95% RH; NEMA 3 enclosure.
2.2.2 Water Resistant Sample Draw Oxygen Detector
Product Lines: 99118
Temperature: -40° to 40°C (-40° to 104°F); Consult PureAire for extended ranges.
Rel. Humidity: 0 to 100% RH; IP65 water resistant enclosure.
2.2.3 Class I Explosion Proof Oxygen Detector
Product Lines: 99020/99099
Temperature: -40° to 55°C (-40° to 134°F); Consult PureAire for extended ranges.
Rel. Humidity: 0 to 95% RH; Explosion proof designed for installation in Class I, Div. 1&2,
Groups B, C, and D, Zones 1&2, Groups IIB+H2, IIA hazardous areas.
2.2.4 Class II Explosion Proof Oxygen Detector
Product Lines: 99045
Temperature: -40° to 40°C (-40° to 104°F); Consult PureAire for extended ranges.
Rel. Humidity: 0 to 95% RH; Explosion Proof designed for installation in Class II, Groups E, F,
and G, Class III, Type 4 & 4X. ATEX, IEC Ex, Ex d IIC, IP66.

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2.3 Gas Detection System
Type and Life: Long-Life Zirconium Oxide Sensor cell with a lifespan of 10+ years under
normal conditions.
Transmitter: Features a microprocessor with a built-in 3-digit backlit LCD display and
joystick-operated menus for easy navigation.
2.4 Electrical Requirements
Power: 24VDC external power. A regulated 24VDC power supply is required.
Consumptions: Approx. 250mA
2.5 Physical Characteristics
2.5.1 Sample Draw Oxygen Detector
Product Lines: Standard
Dimensions: 7.0 (W) x 5.0 (H) x 5.0 (D) inches; 178 x 127 x 127 mm
Weight: 4 pounds (2 kg)
Enclosure Type: General purpose NEMA 3 housing; not intended for explosive atmospheres.
2.5.2 Water Resistant Sample Draw Oxygen Detector
Product Lines: 99118
Dimensions: 7.0 (W) x 5.0 (H) x 5.0 (D) inches; 178 x 127 x 127 mm
Weight: 4 pounds (2 kg)
Enclosure Type: Polycarbonate IP65 water resistant; not intended for explosive atmospheres.
2.5.3 Class I Explosion Proof Oxygen Detector
Product Lines: 99020/99099
Dimensions: 6.625 (W) x 5.50 (H) x 5.25 (D) inches; 168 x 140 x 134 mm
Weight: 12 pounds (5.5 kg)
Enclosure Type: Explosion proof housing designed for installation in Class I, Div 1&2,
Groups BCD, Zones 1&2, Groups IIB+H2, IIA hazardous areas.
2.5.4 Class II Explosion Proof Oxygen Detector
Product Lines: 99045
Dimensions: 6.625 (W) x 5.50 (H) x 5.25 (D) inches; 168 x 140 x 134 mm
Weight: 12 pounds (5.5 kg)
Enclosure Type: Explosion proof housing designed for installation in Class II, Div 1&2,
Groups EFG, Class III, Type 4 & 4X. ATEX, IEC Ex, Ex d IIC, IP66.

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2.6 Default Factory Settings
The Air Check O2 Monitor is shipped with factory defaults that are saved to the memory of the
unit. Factory resettable functions are denoted by †.
Menu
Factory Default
Definition
Set 4-20mA Loop†
mA output is
individually set at the
factory using a
calibrated Fluke meter.
Use this function to adjust the
Oxygen monitors 4 mA (Zero), and
20 mA (Span) analog output
Set Formats†
Alarm 1 = Normal
Alarm 2 = Normal
Fault = Normal
When alarm activates, the relays
should energize (Normal), or de-
energize (Inverted)
Set Polarity†
Alarm 1 = Inverted
Alarm 2 = Inverted
Audio = Inverted*
Alarm should activate above
specified concentration (Normal),
or when lower (Inverted) than the
alarm thresholds
Set Latching†
Alarm 1 = Non-latching
Alarm 2 = Non-latching
Fault = Non-latching
Automatic alarm reset (non-
latching), or manual alarm reset
(latching)
Alarm Delay†
Alarm = 5 Seconds
Delay until alarm is activated
Zero Suppression
—
NOT ENABLED ON O2 MONITOR
Set Alarm
Thresholds†
Alarm 1 = 19.5%
Alarm 2 = 18.0%
Audio = 19.5%*
Alarm levels
Set Alarm
Hysteresis†
Alarm 1 = 0.0%
Alarm 2 = 0.0%
Audio = 0.0%*
Deadzone setting, more
information in Section 5
Sensor
Adjustment†
Monitors are
individually calibrated
at the factory using
NIST traceable gas
mixtures
For manual span adjustment or
dynamic calibration (w/ known
span gas) of Oxygen monitor
Manage
Passwords Factory Default is 557 For changing the password from
factory default to a new password
*NOTE: The Audio alarm feature is optional
The LED indicators on the front panel are connected directly to the alarm relays.

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3: Installation
3.1 Site Requirements
The Air Check O2Sample Draw Monitor is a sensitive piece of equipment and requires strategic
placement to function optimally. Select an installation site that is free from extreme vibration,
electrical noise or interference, high temperatures, or areas with a high likelihood of condensing
humidity.
Consider installing the monitor at an elevated position that facilitates easy operation,
maintenance, and display visibility. It should be mounted a minimum of 12 inches from the floor
level and maintain a clearance of at least 3.75 inches for the inlet dust filter, a critical component
that extends the lifespan of the device.
The monitor incorporates an internal sample pump, factory-set at a rate of 250 cc/min (0.25
LPM), which cannot be adjusted in the field. An onboard flow sensor continually observes the
flow rates and triggers a fault mechanism, which includes the activation of a front-mounted LED
and a fault relay, should the flow rate deviate from the set standard.
The pump responds dynamically to potential blockages in the sample line; it accelerates to
restore the proper flow rate when a blockage is detected, and the fault indicator illuminates. If the
obstruction is removed, the pump adjusts its speed accordingly, and the fault light deactivates
once the flow rate is back to the factory-prescribed settings.
We suggest using polypropylene sample tubing with dimensions of 1/4” OD by 3/16” ID for
optimal results. To maintain sample integrity, ensure that the tubing is of low permeability. Note
that the monitor is designed to draw samples from distances ranging from 3-100 feet, and the
total length of the tubing should not exceed 100 feet. Please consider lag time proportional to the
distance of tubing for changes in oxygen readings.
NOTE: Pump is optional. For pumpless models, there will be no indication of flow faults.
CAUTION: ONLY CLASS I (99020/99099) & CLASS II (99045) ENCLOSURES ARE
RATED FOR HAZARDOUS LOCATIONS.

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3.2 Mounting
3.2.1 Sample Draw Monitor Enclosure Dimensions
3.2.2 Water-Resistant Sample Draw Monitor Enclosure Dimensions

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3.2.3 Explosion-Proof Class I Enclosure Dimensions
3.2.4 Explosion-Proof Class II Enclosure Dimensions

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3.2.5 Sample Inlet Filter
3.2.5.1 Dust & Particulate Filter
Depending on the environment, it is recommended that the filter be replaced every 12 months. In
dusty environments, filter replacement may be more frequent.
For replacement dust/particulate filters, please order PureAire P/N 90115.