PureAire Monitoring Systems Air Check Advantage Ex User manual

Air Check Advantage Ex
Methyl iodide Monitor
Instruction Manual
PureAire Monitoring Systems, Inc.
1140 Ensell Road
Lake Zurich, IL. 60047
Phone: [phone]
Fax: [phone]
Toll-Free: 888-788-8050
E-mail: [email protected]
Web: Pureairemonitoring.com

PureAire Monitoring Systems, Inc.
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Welcome to PureAire Monitoring Systems
I’d 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’re capable of providing small systems of a few points
o 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’re available 24
hours a day, 7 days a week to help you when you need us. Our 24 hour Emergency phone number is
1-847-420-3814. We can provide field service, preventative maintenance programs and training
to your technicians in the operation of our equipment. Our goal is to provide the best after sale
service and support in the industry. That’s 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’m proud to welcome you to our family of valued and satisfied customers.
Sincerely,
Albert A. Carrino
President

PureAire Monitoring Systems, Inc.
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Read Before Operating
This gas monitoring system has been designed to provide long-term reliable performance. We recommend the
following basic precautions while installing, operating and maintaining this device.
Read this “Guide to Operation and Installation” carefully. Installation, maintenance, calibration and testing
should be carried out by qualified personnel only.
Check if the power supply matches the specifications given in this guide and ensure that the system has been
connected properly. This monitor must be powered by a regulated 24VDC power supply.
Please insure the proper polarity. Reversing the polarity will damage the fuse on the drive PCB.
After power up, please let the system equilibrate a few hours before making any adjustments.
The Methyl iodide monitor is designed for safety monitoring where normal use is defined as zero gas
concentration with an occasional excursion. If the monitor is continuously exposed to Methyl iodide or if the
monitor is exposed to very high short term gas concentrations, it will require more frequent sensor cell
recharges, and complete pyrolizer filament and pump replacement.
PureAire Monitoring Systems, Inc.
557 Capital Drive
Lake Zurich, Illinois 60047
Ph: 888-788-8050
Ph: 847-726-6000
Fax: [phone]
After Hours Hot Line: 847-420-3814
[email protected]t
www.pureairemonitoring.com
This system has a built-in pyrolizer. The pyrolizer insulation temperature can reach
150 F and can cause burns if touched. Use Caution when working near the pyrolizer.

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Table of Contents
1: Introduction........................................................................................ 4
1.1 Component Identification…………………………………….. 5
2: Specifications.................................................................................... 10
2.1 Performance Specifications........................................................ 10
2.2 Gas Detection System................................................................ 10
2.3 Signal Outputs............................................................................ 11
2.4 Electrical Requirements............................................................. 11
2.5 Physical Characteristics............................................................. 11
2.6 Air Check Methyl iodide Default Settings................................. 12
3: Installation........................................................................................ 13
3.1 Site Requirements...................................................................... 13
3.2 Mounting.................................................................................... 13
3.3 Sensor Installation...................................................................... 13
3.4 Wiring........................................................................................ 14
3.5 Initial Startup ............................................................................. 15
4: Air Check Methyl iodide Programming......................................... 16
4.1 Control Panel Overview............................................................. 16
4.2 Joystick Operation ..................................................................... 16
4.3 Program Flow Chart................................................................... 17
4.4 Entering the Password................................................................ 21
4.5 Changing the User Password..................................................... 22
4.6 Entering the Menus.................................................................... 25
5: Maintenance & Calibration ............................................................ 36
5.1 Routine Maintenance Schedule.................................................. 36
5.2 Loss of Power Indication........................................................... 36
5.3 Sensor Cell Removal and Installation........................................ 37
5.4 Electrolyte Replacement............................................................ 38
5.5 System Calibration..................................................................... 42
6: Appendix........................................................................................... 46
Rev. 3.15 Oct 2015

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1: Introduction
The Air Check Ex Methyl iodide Monitor is a compact extractive gas sampling system designed for
the continuous detection and measurement of toxic gas leaks. It is capable of sampling over distances
of up to 100 feet (33 meters).
The Air Check Ex is a single point monitoring system built into an explosion proof water resistant
housing that may be wall mounted and is designed to require as little space for installation as
possible.
The system has the following features:
24 VDC operation
Built-in pyrolizer
Integral digitally controlled sampling pump and flow system
Local digital display
User selectable dual level alarm and system fault relays
4-20 mA output
Renewable long life electrochemical sensor cell
Supervised electronics monitors sensor, pyrolizer and sample pump
Ex proof enclosure is rated for Class 1, Division 1 Groups B, C & D

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1.1 Component Identification
1.1.1 Overall System Composition
The Air Check Ex Methyl iodide Monitor may be integrated into the overall hazardous gas
monitoring system. As a result, it may be remotely located for the monitoring of process areas and
other environments where access to the instrument for maintenance or service may be restricted. It
may also be used as a stand-alone detection system.
Ex proof Seal Fitting —This is the opening in the transmitter housing for connecting the 4-20 mA
output, 24 VDC power cable, and alarm relay wiring.
Sample Inlet —This is a Class 1 Div 1 Flame arrestor and serves as the connection for the incoming
sample line.
Sample exhaust —This is a Class 1 Div 1 Flame arrestor and serves as the connection for the
incoming sample exhaust line.
Front Cover—This permits accessing the inside of the sample and control system.
Mounting Tabs
Seal Fitting
Front Cover
Sample Exhaust
Sample Inlet
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1.1.2 Front View Control Panel
1. Local Digital Display —During normal operation, displays the name and concentration of the
target gas. Also displays alarm messages and programming/calibration menus and information.
NOTE: The digital display is generic and used for all gases. Any display of gases other
than Methyl iodide are for reference for the instruction manual only.
2. Joystick —Used for selecting and adjusting the built-in menus for alarm threshold settings,
relay state, alarm delay etc.
3. Alarm & Fault LED’s —These LED’s illuminate when a gas concentration alarm or
instrument fault is detected.
4. Flowmeter —This flow meter displays the flow rate to the sampling system in SCFH.
NOTE –The flow rate is factory set and is continuously regulated via a built-in flow sensor.
Flow rate is factory set for sampling distances up to 100 feet. Field adjustment should
not be required.
Local Digital
Display
Joystick
Alarm &
Fault
(LED’s)
AL 2 , AL 1
& Fault
Flowmeter

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1.1.3 Internal View
1. Main Power Connector —Connector for 24VDC power input. See section 3: Installation for
more information.
2. Pyrolizer Assembly —Converts AN gas into HCN gas prior to presentation to the gas sensor.
CAUTION - The pyrolizer insulation temperature is above 150 F and can cause burns if touched
3. Pyro & Pump Drive PCB —Controls power to the pyrolizer filament and regulates the sample
pump flow control
4. Control Electronics and readout —Converts the signal from the sensor cell and sends
information to the local digital display and analog /relay terminal block.
5. Flow Meter —Provides positive indication of flow through the monitor.
NOTE –The flow rate is factory set and is continuously regulated via a built-in flow sensor.
6. Flow Chamber —The converted gas from the pyrolizer is introduced to the gas sensor in this
chamber. Sample flow into the chamber is continually monitored. If the sample pump fails, the
system fault relay is activated.
7. CH3I Sensor Cell —A renewable electrochemical sensor cell. Typical life is 3 to 6 years.
8. Sample Pump —This internal sample pump is used to draw the gas sample from the area into
the pyrolizer and flow chamber.
NOTE –The sample pump flow is continuously regulated via a built-in flow sensor.
1) Main Power Connector
2) Pyrolizer Assembly
4) Control Electronics / Readout
5) Flow Meter
3) Pyro & Pump Drive PCB
7) CH3I sensor cell
6) Flow chamber
9) Sample Pump
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1.2.5 Transmitter Interior
1. Power Analog Terminal Block —This terminal block is where the 24VDC power and 4-20
mA analog output connection is made.
1.2.6 Alarm Relay Board
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Pump Connector
Alarm 2 Relay
CONN 1
Alarm 1 Relay
CONN 2
Fault Relay
CONN 3
NO NC C NO NC C NO NC C
Alarm 2 Alarm 1 Fault Relay
Sensor cell
connector
24 VDC Power
Terminal
Block
(Terminated at
Factory)
Flow Sensor
Remote
Reset
Terminal Block
1. Power Analog
Terminal Block
Common
(Terminated at Factory)
mA output
+ 24VDC
(Terminated at Factory)
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Main power connection
(To be terminated by
customer)
Status LED’s
Green Power LED. Confirms
Power is being supplied to the monitor
Yellow Flow Status LED.
Confirms the sample pump is
operating and flow is being
maintained at the proper flow rate
Blue Fault Status LED.
Indicates various system faults.
When not in fault the Blue LED
remains illuminated continuously
Pump and Pyrolizer Drive Assembly
Pyrolizer
Filament
connector
Pyrolizer
Drive Board
Main 24VDC
Power
Connector
(Do Not
Remove
Jumper)
Sample
Pump
+ 24VDC Pin 1 Common Pin 2
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