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PureAire Universal Gas Detector Instruction Manual

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Universal
Gas Detector
Instruction Manual
PureAire Monitoring Systems, Inc.
1140 Ensell Road
Lake Zurich, Illinois 60047
Phone: 847-726-6000
Fax: 847-726-6051
Toll-Free: 888-788-8050
pureairemonitoring.com

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  • Page 1 Universal Gas Detector Instruction Manual PureAire Monitoring Systems, Inc. 1140 Ensell Road Lake Zurich, Illinois 60047 Phone: 847-726-6000 Fax: 847-726-6051 Toll-Free: 888-788-8050 pureairemonitoring.com...
  • Page 2 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.
  • Page 3 This can cause the electrolyte to leak from the sensor cell pressure compensation screw. PureAire Renewable sensor cell has a 7-pin connector that connects to the transmitter and remote sensor cable.

  • Page 4: Table Of Contents

    4.3 Routine Maintenance Schedule ..........15 4.4 Loss of Power Indicator .............. 15 4.5 Alarm Reset ................15 5: Universal Gas Detector Programming ..................16 5.1 Joystick Operation ..............16 5.2 Program Flowchart ..............17 5.3 Entering the Password ..............21 5.4 Changing the User Password ............

  • Page 5: 1: Introduction

    PureAire Monitoring Systems, Inc. 1: Introduction The Universal Gas Detector is a compact gas monitor designed for the continuous detection and measurement of toxic and corrosive gas leaks. It consists of a generic transmitter/controller connected to a dedicated, renewable gas sensor that automatically inputs the gas and measurement range. The Universal is a single point monitor built into a polycarbonate UL listed enclosure suitable for indoor use.

  • Page 6: Component Identification

    Calibration 1.1.3 The PureAire Gas Sensor used with the Universal Gas Detector has a dedicated microcontroller built directly into the sensor electronics which allows you to remove from it the transmitter for all routine calibration and maintenance. Calibration data is directly entered into the sensor electronics and then transferred to the transmitter once it’s plugged in.
  • Page 7 PureAire Monitoring Systems, Inc. Digital Display — 3-digit backlit LCD digital display for showing the type of gas detected and concentration in ppm, ppb or %. Joystick — Used for selecting and adjusting the built-in menus. The joystick is also used to select alarm levels, relay settings and resetting any latching visual and audio alarms.
  • Page 8 PureAire Monitoring Systems, Inc. 1.2.3 Side View Exterior with Audio Alarm Audio Horn — This built-in horn is a 90dB high pitched audio sound that will activate when the alarm levels go above the selected alarm thresholds. The audio alarm is non-latching and will automatically turn off when the gas levels go below the alarm thresholds NOTE: The audio alarm is an immediate alarm.
  • Page 9 PureAire Monitoring Systems, Inc. 2. Sensor cell 1.2.4 Transmitter Interior connector 1. Power Analog output Terminal Block Fuse (Field replaceable) Common Common mA output + 24 VDC + 24 VDC Power Analog Terminal Block — This terminal block is where the 24VDC power and 4-20 mA analog output connection is made.
  • Page 10 Universal Gas Detector with remote cable connected to the wall (Max cable length 30 feet) Universal Gas Detector with remote cable connected to a duct (Max cable length 30 feet)

  • Page 11: 2: Specifications

    Loss of VDC power; analog signal drops to 0 mA Electronics failure: Fault relay activated and analog signal drops to 2 mA. Operating Temp: -30° 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 12: Physical Characteristics

    Enclosure Type: General purpose; not intended for explosive atmospheres. 2.6 Universal Gas Detector Default Factory settings The Universal Gas Detector is shipped with factory defaults for the alarm relay settings. The following are the factory defaults: Menu Function Factory Default...

  • Page 13: 3: Installation

    3.2 Mounting 3.2.1 Transmitter Enclosure The Universal Gas Detector is designed primarily for wall mounting and should be installed at a height convenient for operation, maintenance, and viewing of the instrument display. The following is a drawing of the mounting dimensions.

  • Page 14: Wiring

    PureAire Monitoring Systems, Inc. 3.3 Wiring The Universal Gas Detector requires a single, 3-wire shielded cable for analog output and 24 VDC power input. A three-wire shielded cable; 3-conductor, 18 AWG stranded General Cable E2203S.30.860, or equivalent is recommended for the connection. The analog out and VDC power in connections are made on the terminal block inside the transmitter housing.

  • Page 15: Sensor Installation

    PureAire Monitoring Systems, Inc. 3.4 Sensor Installation  NOTE: The following applies to the Renewable Sensor cell mounted directly to the Universal Gas Detector transmitter.  IMPORTANT: Be careful not to touch the membrane on the bottom of the sensor during installation.

  • Page 16: Initial Startup

    After power up, reset the zero. Refer to Section 6.2.4 The instrument should now be powered up. Upon power up, the Universal Gas Detector LCD displays the PureAire logo and then starts a 30 second count down. During the entire warm-up period the monitor will momentarily activate the internal relays and horn.

  • Page 17: 4: Normal Operation

    PureAire Monitoring Systems, Inc. 4: Normal Operation The Universal Gas Detector is a single point monitor designed for the continuous detection and measurement of ambient toxic and corrosive gas concentration levels. 4.1 Signal Outputs The Universal Gas Detector outputs a continuous 4-20 mA analog signal proportional to the measured concentration of toxic or corrosive gas.

  • Page 18: Routine Maintenance Schedule

    Every 6 - 12 months 4.4 Loss of Power Indicator In the event the Universal Gas Detector loses 24VDC power, the 4-20 mA analog output signal drops to 0mA. The LCD display will also display a blank screen. 4.5 Alarm Reset Whenever the detector alarms are activated, the built-in alarm relays, panel mounted LED’s and audio...

  • Page 19: 5: Universal Gas Detector Programming

    PureAire Monitoring Systems, Inc. 5: Universal Gas Detector Programming The Universal Gas Detector 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 20: Program Flowchart

    PureAire Monitoring Systems, Inc. 5.2 Program Flowchart Enter PassCode OK 0.0 ppm Password Set 4-20mA Set 4mA PassCode OK loop Zero Set 20mA Span NOTE: All numerical values shown are only examples and are not Factory Test Loop & Testing...
  • Page 21 PureAire Monitoring Systems, Inc. Set Alarm Set Alarm 1 Normal Threshold PassCode OK Polarity Polarity Invert Set Alarm 2 Normal Polarity Invert Set Audio Normal Alarm Polarity Invert Set Latching Set Latching Relay 1 Nonlatch NOTE: All numerical Latch values...
  • Page 22 PureAire Monitoring Systems, Inc. Zero PassCode OK Suppression 0.2 ppm Set Alarm Set Relay 1 5 ppm Thresholds Alarm Set Relay 2 10 ppm Alarm Set Audio 5 ppm Alarm NOTE: All Set Alarm Set Alarm 1 ppm or %...
  • Page 23 PureAire Monitoring Systems, Inc. Enter Enter New Manage PassCode OK minimum of User Passwords 2 characters Password Enable User Enabled Password Disabled Reset User Reset to Factory Password Default...

  • Page 24: Entering The Password

    PureAire Monitoring Systems, Inc. 5.3 Entering the Password The Universal Gas Detector is supplied with a factory set password to prevent unauthorized access to The Password is 557. 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 25: Changing The User Password

    PureAire Monitoring Systems, Inc. 5.4 Changing the User Password The Universal Gas Detector 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 26 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 27 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 please contact PureAire with your 0.0 ppm serial number or DTM number...

  • Page 28: Entering The Menus

    PureAire Monitoring Systems, Inc. 5.5 Entering the Menus The Universal Gas Detector is supplied with main menus with sub menus to adjust mA outputs, alarm relay settings, sensor adjustments and zero suppression for toxic and corrosive gas sensor cells. 5.5.1 Set 4-20mA loop .Set 4-20mA loop..
  • Page 29 The 20mA output being sent from the Universal Gas detector will change as the number on the digital display changes. Push the joystick left once to enter the setting.

  • Page 30: Set Formats

    PureAire Monitoring Systems, Inc. 5.5.2 Set Formats This is the menu at which to adjust the relay states for the two gas alarm relays and the individual instrument fault relay. Push the joystick down to access the next main menu, Set Formats. The display will scroll the following: …Set Formats…...
  • Page 31 PureAire Monitoring Systems, Inc. Push the joystick down to access the next menu, Format Relay 2. The display will scroll the following: … Format Relay 2.. 0.0 ppm This is the menu at which to adjust the second level alarm relay state on the Universal Gas Detector.

  • Page 32: Set Alarm Threshold Polarity

    Push the joystick right to access the first sub menu; Set Alarm 1 Polarity will scroll on the display. This is the menu at which to adjust the first level alarm polarity state on the Universal Gas Detector. ..Set Alarm 1 Polarity...
  • Page 33 Push the joystick down to access the next sub menu; Set Audio Alarm Polarity will scroll on the display. This is the menu at which to adjust the second level alarm polarity state on the Universal Gas Detector. ..Set Audio Alarm Polarity...

  • Page 34: Set Latching

    Push the joystick right to access the first sub menu; Set Latching Relay 1 will scroll on the display. This is the menu at which to adjust the first level alarm latching state on the Universal Gas Detector. ..Set Latching Relay 1…...
  • Page 35 Push the joystick down to access the next sub menu; Set Latching Relay 2 will scroll on the display. This is the menu at which to adjust the second level alarm state on the Universal Gas Detector. ..Set Latching Relay 2…...

  • Page 36: Resetting A Latching Alarm

    5.5.5 Resetting a Latching Alarm To reset a latching alarm relay, you must enter the password correctly and then push the joystick IN to enter the reset command. The Universal Gas Detector also has an internal 2-pin terminal block for connecting a remote reset switch. (See Alarm Relay board, section 1.2.7)

  • Page 37: Set Zero Suppression

    PureAire Monitoring Systems, Inc. 5.5.7 Set Zero Suppression This menu is provided to decrease the sensitivity of selected gas sensors. It essentially programs the instrument to ignore gas measurements that are below the programmed ppm level.  EXAMPLE: If the measurement range of the instrument is 0 to 10 ppm, gas measurements below 0.5 ppm will be displayed and output as 0 (zero) when the zero-...
  • Page 38 PureAire Monitoring Systems, Inc. This is the gas concentration at which the instrument’s first level alarm will be activated. To change the displayed value, push the joystick to the right to display the first level alarm setting. The display will indicate a value between 0.0 ppm and the full scale of the monitor.

  • Page 39: Set Alarm Hysteresis

    0.0ppm 5.5.9 Set Alarm Hysteresis PureAire’s Universal Gas Detector may be used as a control system. When used to regulate gas 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 gas concentration.
  • Page 40 PureAire Monitoring Systems, Inc. Pushing the joystick again to the right will display a value 0.0ppm (factory default). Pushing the joystick up increases the percentage up to a maximum value of the full range for the monitor. Adjust the digital display until the desired hysteresis value is selected 0.5ppm...

  • Page 41: Set Sensor Adjust

    0.0ppm 5.5.10 Set Sensor Adjust This menu will permit calibrating the Universal Gas Detector to a known span gas concentration. It is recommended to calibrate the detector every six months or anytime the sensor cell electrolyte is replaced. For a complete explanation of the sensor cell calibration procedure refer to Section 6.2...

  • Page 42: 6: Maintenance & Cell Calibration

    6.1.1 Sensor Cell Recharge 1. Remove the sensor cell from the Universal Gas Detector or duct. 2. Remove the box nut, membrane retainer ring, membrane, O-ring and silicon sheet, (if provided) 3. Do not remove the cell from the mounting ring NOTE: The O-rings can be either black or white.
  • Page 43 PureAire Monitoring Systems, Inc. 5. Hold the sensor in your hand with the sensing electrode up. Pour 10 cc’s of fresh electrolyte into the sensor and rinse. Discard into the beaker. Nozzled Electrolyte Bottle Sensing Electrode Electrolyte P/N EL-160-1 Pressure Compensation Port 6.
  • Page 44 PureAire Monitoring Systems, Inc. 6. Refill the sensor cell with fresh electrolyte until it reaches ½ the MAX mark. Fill level ½ the MAX mark. Nozzled Electrolyte Bottle Sensing Electrode Electrolyte Pressure Compensation Port 7. Wipe the sensing electrode and the surrounding area with a dry paper tissue.
  • Page 45 PureAire Monitoring Systems, Inc. 8. Place the O-ring and Silicon O-ring Sheet, (if provided) onto the sensor. Silicon Sheet NOTE: If reusing the old O-ring and Silicon sheet, please dry them thoroughly before reinstalling. 8. Apply a generous drop of electrolyte on the sensing electrode.
  • Page 46 PureAire Monitoring Systems, Inc. 10. Place the retainer ring over the membrane and then place the box nut over the retainer ring. Turn box nut clockwise until hand tight; continue tightening until the box nut can no longer be moved by hand.

  • Page 47: Sensor Cell Replacement Parts

    PureAire Monitoring Systems, Inc. 6.1.2 Sensor Cell Replacement parts White or Flat O-Ring Sensors Range Electrolyte Membrane Black O-ring Silicon Sheet GS-161 1 ppm EL-160-1 M-100M White GS-160 3 ppm EL-160-1 M-100M White GS-161 1 ppm EL-160-1 M-100M White GS-261...

  • Page 48: Sensor Calibration Procedure

    CAUTION: Be sure to observe all safety guidelines when using span gases. NOTE: If the instrument is connected to a controller, set the controller to the standby mode to avoid accidental alarms. The Universal Gas Detector’s internal alarm LED’s and relays are always live. During a calibration test if levels exceed preset alarm thresholds you will also be verifying the internal alarms and any remote horns, strobes or fans that are connected.

  • Page 49: Sensor Calibration Equipment

    PureAire Monitoring Systems, Inc. 6.2.2 Sensor Calibration Equipment It is recommended to purchase calibration gas standards directly from your specialty gas provider. Calibration span gas standards can be found from the following suppliers: Air Liquide Specialty Gas; (alspecialtygases.com) Scott Specialty Gas; (alspecialtygases.com) CalGas;...

  • Page 50: Setting Zero

    PureAire Monitoring Systems, Inc. Push the joystick down to display the “Set Sensor Zero” menu. ..Set Sensor Zero… 0.0 ppm 6.2.4 Setting Zero  IMPORTANT: This procedure should be performed under normal monitoring conditions, without any of the target gas present. It is not recommended to use zero air.
  • Page 51 PureAire Monitoring Systems, Inc. 4) Push the joystick Right to enter the sensor span mode. 0.0 PPM 5) Open the valve on the Span gas cylinder 6) Expose the sensor cell to the span gas for 1 to 2 minutes until the gas reading stabilizes.
  • Page 52 PureAire Monitoring Systems, Inc. 9) Turn off the gas and remove the sensor cell from the calibration cap by gently rocking the sensor from the cap. 10) Allow the instrument to return to a zero reading. If the instrument has not returned to zero after 5 minutes, reset the zero.

  • Page 53: 7: Appendix

    Remote Display Alarm Indicator The Remote Display Alarm Indicator is designed to display remote concentration information from PureAire monitors. All PureAire monitors have a built in 4- 20mA output. The remote display alarm easily connects to the monitor’s input power and mA output connection. An 18 AWG, three conductor, shielded control and instrumentation cable, Belden 8770 or equivalent is recommended for the connection.
  • Page 54 PureAire Monitoring Systems, Inc. How to mount the Remote Display Alarm Indicator 1) Open the two side doors to expose the front panel screws. 2) Loosen the 4 screws to separate the front panel from the case. Mount the case to a wall or other flat surface.
  • Page 55 2. Alarm Polarity Switches – These switches are used to select when the alarms will activate. For Universal Gas Detector the alarm switches are set for “Below”. If the readings go into alarm the internal horn and LED’s will activate. When used with our toxic gas monitors, the polarity is set to “Above”.
  • Page 56 LED and the display will read FL , (indicating that the Universal Gas Detector is in fault). This will clear after the Universal Gas Detector completes the 30 second warm-up. During warm up...
  • Page 57 Detector and the remote display alarm indicator. To perform this in the field, first enter the password on your Universal Gas Detector and select the “Set 4-20mA loop” menu. (See Section 5.5.1 Set 4- 20mA loop in your Universal manual).
  • Page 58 Alarm 2 Alarm 1 Fault Relay Board This drawing shows how to connect a remote Horn and strobe to PureAire’s Universal Gas Detector with the Alarm relay #1 set to a Normally Open position. Note: Federal Signal Horn/Strobe or equivalent...
  • Page 59 PureAire Monitoring Systems, Inc. How to connect a remote fan contactor to the Universal Gas detector To external voltage source, 24 VAC or 24 VDC, 2 amps max. Externally powered relay External relay coil. Relay coil voltage Relay 1, or Relay 2...

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