PureAire Air check O2 Instruction Manual
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PureAire Air check O2 Instruction Manual

O2 deficiency monitor 0-25%
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Air Check
O
Deficiency Monitor 0-25%
2
Instruction Manual
For model D
Part number 99018
1140 Ensell Road
Lake Zurich, Illinois 60047
Phone: 847-726-6000
Fax: 847-726-6051
Toll-Free: 888-788-8050
pureairemonitoring.com
Rev 4.09 September 2022

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  • Page 1  Air Check Deficiency Monitor 0-25% Instruction Manual For model D Part number 99018 1140 Ensell Road Lake Zurich, Illinois 60047 Phone: 847-726-6000 Fax: 847-726-6051 Toll-Free: 888-788-8050 pureairemonitoring.com Rev 4.09 September 2022...
  • Page 2 Our goal is to provide the best after sale 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’m proud to welcome you to our family of valued and satisfied customers.
  • Page 3 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 a waterproof enclosure. 8. The Factory Password for entering the menus is...

  • Page 4: Table Of Contents

    PureAire Monitoring Systems, Inc. Table of Contents 1: Introduction ........................2 1.1 Key Features ................ 2 1.2 Component identification ............ 3 2: Specifications ........................7 2.1 Performance Specifications ..........7 2.2 Gas Detection System ............7 2.3 Signal Outputs ..............7 2.4 Electrical Requirements ............

  • Page 5: 1: Introduction

    Each system consists of a long-life zirconium oxide sensor cell and three-wire transmitter. The Air Check O monitor may be used as a stand-alone gas detector, linked to optional PureAire single and multipoint controllers, or connected to your own centralized control and surveillance system. This manual covers the installation, operation, and maintenance of the Air Check O...

  • Page 6: Component Identification

    PureAire Monitoring Systems, Inc. 1.1.3 Calibration The Air Check O monitor incorporates a stable zirconium oxide sensor that rarely requires calibration. Changing barometric pressure changes or changes in temperature and humidity do not affect the zirconium oxide oxygen cell. The earth is a wonderful source of calibrated oxygen at 20.9%, therefore under ambient conditions visual verification of the Air Check O...
  • Page 7 PureAire Monitoring Systems, Inc. Transmitter Cover — A removable cover that protects the interior of the transmitter. Transmitter Cover Fasteners — There are 4 captive screws secure the transmitter cover in place. Electronics Fasteners — These captive screws secure the electronics to the enclosure 1.2.2 Front View Exterior...
  • Page 8 PureAire Monitoring Systems, Inc. 2. Sensor cell 1.2.5 Transmitter Interior connector 1. Power and analog output Terminal PTC Resettable Fuse Common Common mA output + 24 VDC + 24 VDC Identification legend 1. Main Power Terminal Block — This terminal block is where the main power and 4-20mA analog output connection is made.

  • Page 9: 2: Specifications

    Loss of VDC power (analog signal drops to 0 mA). Sensor cell failure: Operating Temp: -40° to 134°F (-40° to +55°C); consult PureAire for lower or higher operating temperatures. Humidity: 0 to 95% RH; consult PureAire for sensors which can operate in 100% condensing RH environments.

  • Page 10: System Default Factory Settings

    PureAire Monitoring Systems, Inc. 2.6 AirCheck O System Default Factory settings The Air Check O Deficiency Monitor is shipped with factory defaults for the alarm relay settings. The following are the factory defaults: Menu Function Factory Default Menu Defined Set 4-20mA loop...

  • Page 11: 3: Installation

    30 feet. WARNING: The Air Check monitor is not designed for installation in  hazardous areas. Consult PureAire for information on enclosures for use in hazardous environments. 3.2 Mounting 3.2.1 Transmitter Enclosure The Air Check O...

  • Page 12: Wiring

    The instrument should now be powered up. Upon power up, the Air Check  O monitor LCD displays the PureAire logo and then starts a 4-minute, (240 second) count down as the current to the zirconium oxide O sensor stabilizes. The monitor will output a 4-mA signal during the entire warm- up period.

  • Page 13: 4: Normal Operation

    NOTE: All system faults are displayed on the front panel. Each fault has it’own specific code to identify the specific problem. Please contact PureAire whenever a fault is displayed. NOTE: If a Fault condition clears itself, the Fault message will continue to scroll until manually cleared.

  • Page 14: Routine Maintenance Schedule

    PureAire Monitoring Systems, Inc. 4.3 Routine Maintenance Schedule Continuous gas detection systems depended upon to measure and detect hazardous gas leaks in the workplace requires periodic maintenance to ensure proper operation. The frequency with which this routine maintenance is required depends on the environment. The following table is intended to serve as a general guideline for routine maintenance.

  • Page 15: Monitor Programming

    PureAire Monitoring Systems, Inc. 5: Air Check O Monitor Programming The Air Check O Deficiency Monitor is supplied with user selectable settings to adjust the alarm settings, 4 and 20mA output and minor sensor adjustments. The settings are arranged in menus that are accessed by moving the joystick.

  • Page 16: Program Flowchart

    PureAire Monitoring Systems, Inc. 5.2 Program Flowchart Enter PassCode OK Oxygen Password 20.9% Set 4mA Set 4-20mA PassCode OK Zero loop Set 20mA Span NOTE: All numerical values shown are only examples and are not Factory Not available Defaults Force loop...
  • Page 17 PureAire Monitoring Systems, Inc. Set Alarm 1 Set Alarm Normal Threshold Polarity PassCode OK Polarity Invert Set Alarm 2 Normal Polarity Invert Set Audio Normal Alarm NOTE: The Polarity menus highlighted in Invert light gray are only used for O2 monitors...
  • Page 18 PureAire Monitoring Systems, Inc. NOTE: Zero suppression Zero function is not PassCode OK Suppression available for 000 * Oxygen Set Alarm Set Relay 1 19.5% Thresholds Alarm NOTE: The menus highlighted in Set Relay 2 light gray are 18.0% Alarm...
  • Page 19 PureAire Monitoring Systems, Inc. Enter Enter New Manage minimum of 2 PassCode OK User Password Passwords characters Enabled Enable User Password Disabled Reset to Reset User Factory Password Default...

  • Page 20: Entering The Password

    PureAire Monitoring Systems, Inc. 5.3 Entering the Password The Air Check Oxygen monitor is supplied with a factory set password to prevent unauthorized access The Password is 557. to the menus. The following explains how to enter the password. 1. Push the joystick once to the right. Enter Password will scroll on the first line of the digital display.

  • Page 21: Changing The User Password

    PureAire Monitoring Systems, Inc. 5.4 Changing the User Password The Air Check Oxygen monitor is supplied with a factory set password to prevent unauthorized access to the menus. The user can change this password and the following explains how to change the password.
  • Page 22 PureAire Monitoring Systems, Inc. 6. Push the joystick again to the right to select the third entry. Push the joystick up or down to select the third and final digit. The character being entered will flash and the first and second characters entered will remain lit.
  • Page 23 Push the joystick in, (like a doorbell) to reset the password back to 557. Push the joystick left 4 times to go back to the measuring mode. NOTE: If you lose your password Oxygen please contact PureAire with your 20.9% serial number or DTM number...

  • Page 24: Entering The Menus

    PLC controller or SCADA system. You can also connect the Air Check O monitor to a volt meter to read the mA output. Please consult PureAire for more information. From this main menu, pushing the joystick to the right will select the sub menu and the digital display will scroll the following: ..Set 4mA zero…...
  • Page 25 NOTE: The Force Loop function is not available on the Air Check O monitor. It was designed for toxic and corrosive gases. This is the sub menu is only used on PureAire’s toxic and corrosive monitors. …Not Available.. 20.9% Push the joystick to the left brings you back to the pervious menu. The digital display Will scroll the following: ...Force Loop…..

  • Page 26: Set Formats

    PureAire Monitoring Systems, Inc. 5.5.2 Set Formats (Only available on O monitor with Relays) This is the menu at which to adjust the relay states for the two gas alarm relays and the individual instrument fault relay. NOTE: The O system must have the relay module installed to access this menu.
  • Page 27 PureAire Monitoring Systems, Inc. From this main menu, pushing the joystick to the right will select the sub menu and the digital display will scroll the following: ..Format Relay 1… 20.9% Push the joystick down to access the next main menu, Set Formats. The display will scroll the following: …...

  • Page 28: Set Alarm Threshold Polarity

    PureAire Monitoring Systems, Inc. This is the menu at which to adjust the fault alarm relay state on the Air Check Monitor. To change this value, push the joystick right to display the relay state. The display will Indicate INVERT. Pushing the joystick down will change the relay state from INVERT to NORMAL.
  • Page 29 PureAire Monitoring Systems, Inc. INVERT 20.9% NORMAL 20.9% After entering the relay state, the display will default back to the Set Alarm 1 Polarity menu. The display will scroll the following: ..Set Alarm Polarity.. NOTE: The 20.9% menus highlighted in Push the joystick down to access the next sub menu;...

  • Page 30: Set Latching

    PureAire Monitoring Systems, Inc. To change this value, push the joystick right to display the relay state. The display will Indicate INVERT. Pushing the joystick down will change the relay state from INVERT to NORMAL. Press ENTER to accept the value.
  • Page 31 PureAire Monitoring Systems, Inc. To change this value, push the joystick right to display the relay state. The display will Indicate LATCH. Pushing the joystick down will change the relay state from LATCHING to NON-LATCHING. Press ENTER to accept the value.
  • Page 32 PureAire Monitoring Systems, Inc. After entering the relay state, the display will default back to the Set Latching menu. The display will scroll the following: ..Set Latching…. 20.9% From this main menu, pushing the joystick to the right will select the sub menu and the digital display will scroll the following: ..Set Latching Relay 1…...

  • Page 33: Resetting A Latching Alarm

    PureAire Monitoring Systems, Inc. 5.5.5 Resetting a Latching Alarm (Only available on O monitor with Relays) To reset a latching alarm relay, you must enter the password correctly and then push the joystick down to enter the reset command. The Oxygen monitor also has an internal 2-pin terminal block for connecting a remote reset switch.

  • Page 34: Set Alarm Thresholds

    PureAire Monitoring Systems, Inc. 5.5.8 Set Alarm Thresholds (Only available on O monitor with Relays) ..Set Alarm Thresholds.. 20.9% This main menu will permit adjusting the oxygen concentration percentage that will activate alarm levels 1 and 2. If the Audio alarm output module is installed, it will also permit setting the level at which the audio alarm will activate.
  • Page 35 PureAire Monitoring Systems, Inc. Pushing the joystick up increases the value and pushing the joystick down decreases the value. Press ENTER to accept the value. 18.0% 20.9% After entering the relay state, the display will default back to the Set Relay 2 Alarm Threshold Menu.

  • Page 36: Set Alarm Hysteresis

    (Only available on O monitor with Relays) PureAire’s oxygen monitor may be used as a control system. When used to regulate oxygen levels the need of a dead band, “hysteresis” may be required for the alarm relays. This menu will permit the setting of the alarm hysteresis to a desired concentration of Oxygen.

  • Page 37: Set Sensor Adjust

    PureAire Monitoring Systems, Inc. Press ENTER to accept this value. The digital display will revert to Set Alarm 2 Hysteresis. ..Set Alarm 2 Hysteresis… 20.9% Push the joystick down to access the next sub menu; Set Alarm Audio Hysteresis will scroll on the digital display.

  • Page 38: Main Operation Mode

    Press the joystick to the left to revert back to the Sensor Adjustment menu. NOTE: The “Set Module Zero” menu is not available for the Oxygen monitor This menu was designed for PureAire toxic and corrosive gas monitors. When selected, nothing will happen. Push the joystick Left to leave this menu.

  • Page 39: 6: Maintenance & Cell Verification

    0% oxygen. 6.1.1 Sensor Verification Gas For testing the Air Check O monitor, PureAire recommends the use of nitrogen. This can be purchased from your gas supplier, or the gas supplier listed below: 6.1.2 Sensor Verification Equipment...

  • Page 40: Sensor Verification Procedure

    PureAire Monitoring Systems, Inc. 6.2 Sensor Verification Procedure CAUTION: Be sure to observe all safety guidelines when generating and using nitrogen. Under ambient non-oxygen deficient environments, Air Check monitor will  indicate a display reading of 20.9%. As the sensor ages, the reading may decrease in value.
  • Page 41 …Sensor adjustment.. 20.9% 6.2.1 Sensor Verification to Nitrogen PureAire recommends challenging the O monitor with nitrogen every 6 to 12 months. The sensor protector has a ¼” male tube fitting designed for connecting sample tubing from a Nitrogen cylinder. Expose the O...
  • Page 42 PureAire Monitoring Systems, Inc. NOTE: The Oxygen monitor should be tested in an upright position to allow the span gas to fully saturate the sensor cell. CAUTION: For best results, the Oxygen monitor should be protected from wind and high airflow when gas calibrating with test gas.

  • Page 43: 7: Appendix

    PureAire Monitoring Systems, Inc. 7.0 Appendix...
  • Page 44 PureAire Monitoring Systems, Inc. How to convert 4-20mA current output to a 1-5 VDC voltage output PureAire O2 Monitor User PLC input 4-20mA output Attach 250-ohm resistor to the PLC or device input...

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99018

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