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Related Manuals for PureAire Air Check O2 KF-25
Summary of Contents for PureAire Air Check O2 KF-25
- Page 1 Air Check Deficiency Monitor KF-25 0-25% Instruction Manual Part Number 99035, 99128 1140 Ensell Road Lake Zurich, Illinois 60047 Phone: 847-726-6000 Fax: 847-726-6051 Toll-Free: 888-788-8050 pureairemonitoring.com Rev 4.10 April 2023...
- Page 2 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.
- Page 3 Please Read Before Installation The following will damage the Air Check Oxygen monitor. 1. The Air Check O monitor requires 24 VDC regulated power. Please Do Not connect the monitor to any voltage that exceeds ANY AC Voltage. 24 Volts DC, or 2.
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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 ........................8 2.1 Performance Specifications ..........8 2.2 Gas Detection System ............8 2.3 Signal Outputs ..............8 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. Digital Display — 3-digit backlit LCD digital display for showing the oxygen levels in percent. Joystick — Used for selecting and adjusting the built-in menus. The Air Check Low Range O2is available with optional dual level user selectable relays.
- Page 8 PureAire Monitoring Systems, Inc. 1.2.2 Front View Exterior Al 2 Al 1 Fault 1.2.3 Side View Exterior with Audio Alarm NOTE: The audio alarm is an immediate alarm. Oxygen levels must recover above the alarm thresholds before the horn turns off. There is no alarm delay function available.
- Page 9 PureAire Monitoring Systems, Inc. 1.2.5 Transmitter Interior 2. Sensor cell connector 1. Power Analog output Terminal Block Common Common mA output + 24 VDC + 24 VDC 3. PTC Resettable Fuse Power Analog Terminal Block — This terminal block is where the 24VDC power and 4-20 mA analog output connection is made.
- Page 10 PureAire Monitoring Systems, Inc. 1.2.7 Alarm Relay Board Relay 2 Relay 1 Fault Relay Remote NC C NO NC C NO NC C NO Reset Horn Connector Oxygen sensor connector 1.2.8 Enclosure Mounting Feet Mounting Feet can be oriented in any direction...
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Page 11: 2: Specifications
Loss of VDC power (analog signal drops to 0 mA). Sensor cell failure: Fault relay activated. 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 12: System Default Factory Settings
PureAire Monitoring Systems, Inc. 2.6 AirCheck O System Default Factory settings The Air Check O Deficiency Monitor, when supplied with the optional Relay module, is shipped with factory defaults for the alarm relay settings. The following are the factory defaults:... -
Page 13: 3: Installation
If possible, avoid areas with high temperatures or condensing humidity. 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 14: 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 15: 4: Normal Operation
NOTE: All system faults are displayed on the front panel. Each fault has its own specific code to identify the specific problem. Please contact PureAire whenever a fault is displayed. ** When using your own power supply please ensure that the voltage is regulated to 24VDC +/- 0.5 volts. -
Page 16: 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 17: 5: Air Check O
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 18: 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 19 PureAire Monitoring Systems, Inc. Normal Set Alarm 1 Set Alarm Threshold PassCode OK Polarity Polarity Invert Set Alarm 2 Normal Polarity Invert Set Audio Normal Alarm Polarity Invert Set Latching Set Latching Nonlatch Relay 1 NOTE: All numerical Latch values...
- Page 20 PureAire Monitoring Systems, Inc. NOTE: Zero suppression function is not Zero PassCode OK available for Suppressio 000 * Oxygen Set Alarm Set Relay 1 19.5% Thresholds Alarm Set Relay 2 18.0% Alarm Set Audio 19.5% Alarm NOTE: All Set Alarm 1 0.0%...
- Page 21 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 18 | P a g e...
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Page 22: 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 23 PureAire Monitoring Systems, Inc. 6. Push the joystick in the center to enter the password. If you entered it correctly the display will scroll Password OK..PassCode OK…… 20.9% NOTE: If an incorrect password has been entered, the display will indicate Password Failed.
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Page 24: 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 25 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 26 PureAire Monitoring Systems, Inc. …New Password Entry OK… 20.9% NOTE: If on the second entry the password entered was different from the first, the display will take you back to the “Re-enter Password Screen”. You’ll need to repeat steps 2 through 11. If you do not enter the password correctly, the monitor remembers the last password that was properly input.
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Page 27: 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 28 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…..
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Page 29: Set Formats
PureAire Monitoring Systems, Inc. NOTE: When adjusting the 4 mA and 20mA settings, the actual reading may quickly switch from your setting and an alternate number. This is a run time indication and is normal. 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. - Page 30 PureAire Monitoring Systems, Inc. ..Set Formats… 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: ..Format Relay 1… 20.9% Push the joystick down to access the next main menu, Set Formats. The display will scroll the following: …...
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Page 31: Set Alarm Threshold Polarity
PureAire Monitoring Systems, Inc. Push the joystick twice to select the fault relay to be adjusted. The display will scroll, Format Fault Relay. ..Format Fault Relay... 20.9% This is the menu at which to adjust the fault alarm relay state on the Air Check Monitor. - Page 32 PureAire Monitoring Systems, Inc. ..Set Alarm 1 Polarity... 20.9% 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.
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Page 33: Set Latching
PureAire Monitoring Systems, Inc. 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 Air Check O Monitor. - Page 34 PureAire Monitoring Systems, Inc. latching or non-latching state. In a latching state, the relay will remain activated until the user manually selects the Enter Key. In a non-latching state, the alarm relay will automatically reset once the gas concentration has returned to 20.9% for oxygen.
- Page 35 PureAire Monitoring Systems, Inc. Push the joystick down to select the next relay to be adjusted. The display will scroll the following, Set Latching Relay 2. ..Set Latching Relay 2… 20.9% This is the menu at which to adjust the second level alarm relay state on the Air Check Monitor.
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Page 36: Resetting A Latching Alarm
PureAire Monitoring Systems, Inc. NOTE: The O system must have the audio alarm option module installed to access this menu. If this option is installed the display will indicate N/A, (not available) To change this value, push the joystick right to display the relay state. The display will Indicate LATCHING. -
Page 37: Set Zero Suppression
PureAire Monitoring Systems, Inc. and pushing the joystick down decreases the value. Press ENTER to accept the value. 20.9% After entering the alarm delay, the display will default back to the Alarm Delay menu and the display will scroll the following: …Alarm Delay…... - 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 00.0% and 25.5%.
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Page 39: Set Alarm Hysteresis
20.9% 5.5.9 Set Alarm Hysteresis 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 40: Set Sensor Adjust
PureAire Monitoring Systems, Inc. Push the joystick right to access the Set Alarm 1 Hysteresis. Pushing the joystick again to the right will display a value 0.0%, (factory default). Pushing the joystick up increases the percentage up to a maximum value of 2.5%. Adjust the digital display until the desired hysteresis value is selected. -
Page 41: 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 42: Sensor Verification
PureAire Monitoring Systems, Inc. 6: Maintenance & Sensor Verification Only qualified personnel should perform maintenance and sensor verification 6.1 Sensor Verification The earth is a stable source of calibrated oxygen at 20.9%, therefore under ambient conditions you can perform a visual verification of the Air Check O monitor to verify its reading to 20.9%.. - Page 43 Press the joystick to the left to revert back to the Sensor Adjustment menu. …Sensor adjustment.. 20.9% 6.2.1 Sensor Verification to Nitrogen PureAire recommends challenging the O monitor with nitrogen every 6 to 12 months. This requires completely blanketing the sensor with an atmosphere of 99.99% nitrogen inside your chamber.
- Page 44 NOTE: There is no zero-adjustment needed with PureAire’ oxygen monitor. The oxygen sensor span is the only adjustment required.
- Page 45 PureAire Monitoring Systems, Inc. Calibration O-Ring placed in the inlet of the KF-25 tester KF-25 Oxygen Sensor KF-25 Tester Calibration O-Ring Regulator 500cc Span Gas 42 | P a g e...
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Page 46: 7: Appendix
PureAire Monitoring Systems, Inc. 7.0 Appendix 43 | P a g e... - Page 47 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 44 | P a g e...
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