PureAire Monitoring Systems Air Check Advantage Acrylonitrile Monitor User manual

Air Check Advantage
Acrylonitrile Monitor
Instruction Manual
PureAire Monitoring Systems, Inc.
557 Capital Dr.
Lake Zurich, IL. 60047
Phone: [phone]
Fax: [phone]
Toll-Free: 888-788-8050
E-mail: [email protected]t
Web: Pureairemonitoring.com

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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 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’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

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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.
This monitor has a digitally controlled flow system and cell test function. Once per hour the internal
sample pump will power off and on in one second increments. This self-test lasts only 5 seconds without
interfering with methyl bromide readings.
After power up, please let the system equilibrate a few hours before making any adjustments.
NOTE: Please refer to the Quick Start Guide supplied with this manual.
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]
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........................................................................................ 5
1.1 Component Identification……………………………………….6
2: Specifications.................................................................................... 11
2.1 Performance Specifications........................................................ 11
2.2 Gas Detection System................................................................ 11
2.3 Signal Outputs............................................................................ 12
2.4 Electrical Requirements............................................................. 12
2.5 Physical Characteristics............................................................. 12
2.6 Air Check Acrylonitrile Default Settings................................... 13
3: Installation........................................................................................ 14
3.1 Site Requirements...................................................................... 14
3.2 Mounting.................................................................................... 14
3.3 Sensor Installation...................................................................... 14
3.4 Wiring........................................................................................ 15
3.5 Initial Startup ............................................................................. 16
4: Air Check Methyl Bromide Programming.................................... 17
4.1 Control Panel Overview............................................................. 17
4.2 Joystick Operation ..................................................................... 17
4.3 Program Flow Chart................................................................... 18
4.4 Entering the Password................................................................ 22
4.5 Changing the User Password..................................................... 23
4.6 Entering the Menus.................................................................... 26
5: Maintenance & Calibration ............................................................ 37
5.1 Routine Maintenance Schedule.................................................. 37
5.2 Loss of Power Indication........................................................... 37
5.3 Sensor Cell Removal and Installation........................................ 38
5.4 Electrolyte Replacement............................................................ 39
5.5 System Calibration..................................................................... 43
6: Appendix........................................................................................... 47
Rev 3.08 3/1/12

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1: Introduction
The Air Check Acrylonitrile 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 is a single point monitoring system built into an a Nema 4x 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
NOTE: The Air Check Acrylonitrile enclosure is NOT 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 Acrylonitrile 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.
Front Cover—This permits accessing the inside of the sample and control system.
Mounting Tabs—Adjustable feet designed to connect the methyl bromide enclosure to walls or
other solid surface. There is one on each corner of the enclosure.
Cover Fastening Screws—Captive Philips head plastic screws used to fasten the front cover to the
base of the methyl bromide monitor. There is one on each corner of the front cover.
NOTE: Please Do not over tighten the screws as the Phillips head will strip.
Cable Port —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 serves as the connection for the incoming sample line.
Sample exhaust —This serves as the connection for the sample exhaust line.
Mounting Tabs
(on each corner)
Cable Port
Sample Inlet
Front Cover
Cover fastening
screws
(on each corner)
Mounting Tabs
(on each corner)
Sample Exhaust

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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.
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.
Front Cover
Cover fastening
screws
(on each corner)
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. Acrylonitrile 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.
9. Inlet & Exhaust —These are connections for the incoming gas sample and outgoing exhaust
sample
Main Power Connector
Pyrolizer Assembly
Control Electronics / Readout
Pyro & Pump Drive PCB
Flow Meter
Acrylonitrile sensor cell
Flow chamber
Sample Pump
Mounting Feet
Strain relief
Exhaust and Inlet

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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
1. Power Analog
Terminal Block
Common
mA output
+ 24VDC
Common
m
A
o
u
t
p
u
t
+
2
4
V
D
C
9
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