RKI Instruments AirLink 6940XP Operator's Manual
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RKI Instruments AirLink 6940XP Operator's Manual

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AirLink 6940XP
Operator's Manual
Part Number: 71-0584
Revision: P1
Released: 4/14/22
RKI Instruments, Inc.
www.rkiinstruments.com

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Summary of Contents for RKI Instruments AirLink 6940XP

  • Page 1 AirLink 6940XP Operator’s Manual Part Number: 71-0584 Revision: P1 Released: 4/14/22 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 Frequency of calibration depends upon the type of use you have and the sensor types. For most applications, typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage. AirLink 6940XP Operator’s Manual • 2...
  • Page 3 Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge.
  • Page 4 Danger Statements DANGER: The RKI Instruments Inc. AirLink 6940XP is an ambient air Hazardous gas sensor assembly and only monitors in the immediate vicinity of the sensor housing. A site survey is required in order to determine the best placement and quantity of sensor assemblies. Improper installation can lead to an undetectable gas leak which could result in personal injury or loss of life.

  • Page 5: Table Of Contents

    Mounting the AirLink 6940XP ........
  • Page 6 Parts List ............74 AirLink 6940XP Operator’s Manual • 6...

  • Page 7: Overview

    4 different types of toxic gases in potentially hazardous environments. This product is UL certified as Class I, Division 1, Groups B, C, and D. The AirLink 6940XP features non-intrusive magnetic switches that allow for complete system configuration, regular...

  • Page 8: Specifications

    Specifications Table 1 lists specifications for the AirLink 6940XP. Table 1: Specifications Alarm Points Target Gas Detection Range Increment Haz. Loc. (1 / 2 / 3 / 4)* Ammonia (NH 0-100 ppm 1 ppm Cl. 1 Div. 2 12 / 25 / 50 / 100 ppm...
  • Page 9 0 - 100 ppm 0.01 ppm Cl. 1 Div. 1 10 / 15 / 15 / 100 ppm Alarms are only programmable at a controller and do not affect operation of the AirLink 6940XP. Diffusion Sampling Method Enclosure Ratings Explosion/Flame-Proof 9 •...
  • Page 10 • Electrochemical (EC): 250 feet Max Cable Length for Remote-Mounted • Infrared (IR): 40 feet Sensor Kit • PID: 35 feet 7” D x 11” W x 24” H Dimensions 25 lbs. Weight AirLink 6940XP Operator’s Manual Specifications • 10...
  • Page 11 WARNING: When using the AirLink 6940XP, you must follow the instructions and warnings in this manual to assure proper and safe operation of the AirLink 6940XP and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the AirLink 6940XP as described in this manual.

  • Page 12: External Description

    Front panel handles (x2) Sensor Housing Number 3 Display screen Sensor Housing Number 2 Enclosure lid with glass window Sensor Housing Number 1 Magnetic tool NOTE: The AirLink 6940XP’s conduit hubs are 3/4 NPT. AirLink 6940XP Operator’s Manual External Description • 12...

  • Page 13: Internal Description

    Sensor 2 connector Power cable connection Sensor 3 connector Battery pack plug Sensor 4 connector Mounting socket (4x) Control board assembly Battery pack Terminal board assembly Battery pack restraining strap thumbscrew (2x) 13 • Internal Description AirLink 6940XP Operator’s Manual...

  • Page 14: Exploded Drawing

    Sensor housing cap with flame arrestor Internal system (Up to 4) Antenna fitting connector Sensor housing plug (Up to 4) Antenna fitting Enclosure Sensor housing base with sensor adapter board (Up to 4) AirLink 6940XP Operator’s Manual Exploded Drawing • 14...

  • Page 15: Remote-Mounted Kit

    • The unit should be placed greater than 6.5 feet/2 meters away from a monitor in order to ensure reliable communications. • Select a site where the AirLink 6940XP is not likely to be bumped or disturbed. Make sure there is sufficient room to perform start-up, maintenance, and calibration procedures.
  • Page 16 • Avoid installing the AirLink 6940XP in a location where airborne particles could cover or coat the sensor. NOTE: These guidelines are ONLY intended as a general directive for the placement of the AirLink 6940XP. This information should NOT serve as a complete list when considering all potential parameters for the proper location of the unit.
  • Page 17 The cable and cable bushing/cable gland sent with the assembly are not explosion- proof. WARNING: If installed in a classified area, use appropriate construction technique to maintain the explosion-proof classification of the assembly. 4.54 Ø 0.20 3.29 Figure 5: Remote-Mounted Kit’s Detector Junction Box Dimensions 17 • Installation AirLink 6940XP Operator’s Manual...

  • Page 18: Remote-Mounted Kit Wiring

    7. Connect the ferruled wires to the color-coded terminals in the detector junction box. 8. Secure the detector junction box’s enclosure lid back onto the enclosure. AirLink 6940XP Operator’s Manual Installation • 18...

  • Page 19: Connecting The Batteries

    Connecting the Battery The AirLink 6940XP is powered by a 3.6V/76AH lithium-thionyl battery pack. The battery pack is already installed upon shipment but with the wiring disconnected. CAUTION: The internal components can be static sensitive. Use caution when opening the enclosure and handling internal components.

  • Page 20: Closing The Enclosure

    WARNING: When securing the lid onto the device, tighten the enclosure lid by hand ONLY. Overtightening of the lid by use of hand-tools could result in damage to the O- ring, potentially compromising the moisture seal, resulting in an unsafe environment. AirLink 6940XP Operator’s Manual Installation • 20...

  • Page 21: Start Up

    3. Verify that the controller is on and operating properly. Refer to the controller operator’s manual. 4. Press and hold ADD for approximately 6 seconds to turn the AirLink 6940XP on. The unit enters a 1-minute startup period (3.5 minutes for versions with an LEL).
  • Page 22 Sulfur Dioxide (SO VOCs 10 minutes 7. The AirLink 6940XP is factory-calibrated before shipping from RKI. If a full calibration is desired at startup, see page 37. NOTE: The user interface will be slow to respond until the AirLink 6940XP establishes a connection with the controller.

  • Page 23: Operation

    (page 46). When the reading surpasses the background setting, the reading is sent back to the controller in 5-second intervals. NOTE: The user interface will be slow to respond until the AirLink 6940XP establishes a connection with the controller.

  • Page 24: Magnetic Buttons

    Powering the Device When the AirLink 6940XP’s batteries are first plugged in, the unit does not automatically power on. The directions below describe how to power on and power off the AirLink 6940XP once power has been applied. Powering On Powering on the device begins the operation of the unit, automatically initiating the system start- up cycle and 1-minute warm up period (3.5 minutes for LEL versions).

  • Page 25: Faults

    Normal Operating Mode and the affected channel’s units reappear. For a list of the fault codes and warning symbols of the AirLink 6940XP and their associated meanings, see page 53. Above Background Display Behavior...

  • Page 26: Accessing The Settings Menus

    Sensor housing numbers indicated in Figure 1 on page 12. NOTE: After 5 minutes of no interaction with the device, the unit will automatically return to Normal Operating Mode. AirLink 6940XP Operator’s Manual Operation • 26...

  • Page 27: Global Settings And Configuration

    Global Settings and Configuration The AirLink 6940XP’s settings allow the end-user to tailor the device settings to meet their required specifications and/or site conditions. To access the instrument’s Product Settings and Configuration Menus, press and hold MENU for approximately 6 seconds.

  • Page 28: Network Id

    • There are 78 networks available with the 2.4 GHz radio. The controller and AirLink 6940XP must have the same Network ID in order to communicate. 1. If necessary, enter the Product Settings and Configuration menu by pressing and holding MENU for 6 seconds.

  • Page 29: Unit Information

    • The radio In Range Status • The number of missed radio transmissions to the controller • The battery voltage of the AirLink 6940XP • The date of manufacture of the sensor assembly • The serial number of the sensor assembly This screen is for informational purposes only.

  • Page 30: Display Screen Contrast Setting

    Due to varying external elements, such as extreme sunlight, the brightness of the display screen may need to be adjusted for optimum viewing. The contrast setting on the AirLink 6940XP ranges from 0 to 255. The instrument’s factory default setting is 150, approximately 58% of the contrast scale.

  • Page 31: Return To Factory Default Settings

    Return to Factory Default Settings Returning the AirLink 6940XP to its factory default settings will reset all customization of the device, including the zero and calibration settings of the sensor element. A factory default does not change the gas type.

  • Page 32: Exiting The Global Settings Menu

    Global Settings menu. Pressing MENU or BACK will also return the instrument to the Global Settings menu. 6. If “Yes” is selected, the screen will indicate the AirLink 6940XP’s completion of the reset to factory default settings. Press MENU or BACK to return to the Global Settings menu.

  • Page 33: Sensor Settings And Calibration

    Sensor Settings and Calibration The AirLink 6940XP’s sensor settings allows the four sensors to independently calibrated and adjusted. To access these menus, press and hold MENU until the Product Settings and Configuration menu screen appears on the display. Press ADD or SUB to switch between Global Settings and all four sensor setting menus.

  • Page 34: Turning The Sensor On/Off

    The AirLink 6940XP is shipped with the sensors configured as below: • 2 Gas AirLink 6940XP – Sensors 1 and 2 turned ON, Sensors 3 and 4 turned OFF • 3 Gas AirLink 6940XP – Sensors 1, 2, and 3 turned ON, Sensor 4 turned OFF •...

  • Page 35: Zeroing The Sensor

    2. Press and release ADD until the Zero menu item appears. Non-O Sensor Sensor 3. Press MENU to select the menu item. 4. Press ADD to begin the zero process. 35 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...
  • Page 36 Unscrew and remove the rain guard from the assembly. b. Install the calibration cup to the AirLink 6940XP’s sensor housing. c. Screw the regulator into the zero air calibration cylinder (100% N cylinder if zeroing a sensor).

  • Page 37: Calibrating The Sensor (Manual Cal)

    40 to calibrate the sensor element. NOTE: LEL and CO - LEL and CO versions of the AirLink 6940XP can only be calibrated using Auto Cal (see page 40). HCl - It is recommended that the HCl version only be calibrated using Auto Cal, but Manual Cal can be used if desired.
  • Page 38 4. Press MENU to select the Calibration menu item. 5. Unscrew and remove the rain guard from the assembly. 6. Install the calibration cup to the AirLink 6940XP’s sensor housing. 7. Use the sample tubing to connect the regulator to the calibration cup.
  • Page 39 NOTE: Even if the reading does not need adjustment to match the calibration cylinder’s concentration, you must adjust it up and then back down to reset the Cal field in the Zero/Calibration Timer Information screen. 39 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...

  • Page 40: Calibrating The Sensor (Auto Cal)

    NOTE: LEL and CO - LEL and CO versions of the AirLink 6940XP can only be calibrated using Auto Cal (see the next section). HCl - It is recommended that the HCl version only be calibrated using Auto Cal, but Manual Cal can be used if desired.
  • Page 41 4. Press ADD to proceed to the Auto Calibration confirmation screen. To cancel calibration and return to the Sensor Settings menu, press SUB. Pressing MENU or BACK will also return the instrument to the Sensor Settings menu. 41 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...
  • Page 42 7. Press MENU to save the gas concentration setting and advance to the calibration start screen. 8. Unscrew and remove the rain guard from the assembly. 9. Install the calibration cup to the AirLink 6940XP’s sensor housing. 10. Use the sample tubing to connect the regulator to the calibration cup.
  • Page 43 The sensor element will need to be replaced before completing the zero and calibration process. 14. Turn the regulator knob clockwise to close the regulator. 15. Press MENU or BACK to return to the Sensor Settings menu. 43 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...

  • Page 44: Sensor Radio Address

    Sensor Radio Address The AirLink 6940XP sensor radio addresses are adjustable from 1 to 255. Each of sensor that is turned on has its own radio address, and the address for each sensor must be set to a different value.

  • Page 45: Sensor Alarm Test

    The test can also be used to simulate emergency/safety drills onsite. NOTE: Triggering AirLink 6940XP relays will also simulate Alarm 1 and Alarm 2 relays at the controller. Controllers cannot distinguish between real and simulated data received.

  • Page 46: Sensor Background Setting

    MENU to select the menu. 2. Press and release ADD until the Background (Background High for O versions) menu item appears. Press MENU to select the Background menu item. Non-O sensor sensor AirLink 6940XP Operator’s Manual Sensor Settings and Calibration • 46...
  • Page 47 Press MENU or BACK to save the setting(s) and return to the Sensor Settings menu. 5. Press MENU or BACK to save the setting and return to the Sensor Settings menu. 47 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...

  • Page 48: Calibration Method

    3. Use the ADD and SUB buttons to cycle between manual calibration and auto calibration. 4. Press MENU or BACK to save the calibration method and return to the Sensor Settings menu. AirLink 6940XP Operator’s Manual Sensor Settings and Calibration • 48...

  • Page 49: Sensor Information

    2. Press and release ADD until the “Sensor Info” menu item appears. Press MENU to select the “Sensor Info” menu item. 3. Review the information displayed. 4. Press MENU or BACK to return to the Sensor Settings menu. 49 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...

  • Page 50: Last Zero/Cal Times

    2. Press and release ADD until the “Last Time Zero/Cal” menu item appears. Press MENU to select the “Last Time Zero/Cal” menu item. 3. Review the information displayed. 4. Press MENU or BACK to return to the Sensor Settings menu. AirLink 6940XP Operator’s Manual Sensor Settings and Calibration • 50...

  • Page 51: Reset Sensor Zero/Cal

    Calibration values. To return to the Sensor Settings menu without reseting the Zero and Calibration Values, press SUB. Pressing MENU or BACK also returns the instrument to the Sensor Settings menu. 51 • Sensor Settings and Calibration AirLink 6940XP Operator’s Manual...

  • Page 52: Exiting The Sensor Settings Menu

    6. Press MENU or BACK to return to the Sensor Settings menu. NOTE: If the AirLink 6940XP’s stored Zero and Calibration values are reset, the device MUST be zeroed and calibrated again for proper and safe operation of the device.

  • Page 53: Maintenance

    The AirLink 6940XP may be adversely affected by the exposure to certain airborne substances. Loss of sensitivity or corrosion may be gradual if such materials are present in sufficient concentrations.
  • Page 54 System faults will activate the fault terminal on the device. ** When replacing the sensor element, the detector must be nulled and calibrated. AirLink 6940XP Warning Symbols (for LEL Type Only) Problem Cause(s) Solution(s) The sensor is undergoing a rapid 1.

  • Page 55: Replacing The Desiccant

    Each AirLink 6940XP comes with a desiccant bag installed in the junction box. The contents are blue when it is dry. As the desiccant absorbs moisture, it turns amber. Periodically check the desiccant and replace it if it has turned amber.
  • Page 56 Overtightening of the lid by use of hand-tools could result in damage to the O- ring, potentially compromising the moisture seal, resulting in an unsafe environment. 14. Press ADD to initiate the 1-minute startup (3.5 minutes for LEL versions). AirLink 6940XP Operator’s Manual Maintenance • 56...
  • Page 57 Ethylene Oxide Formaldehyde Hydrogen Chloride Hydrogen Cyanide Hydrogen Fluoride Hydrogen Sulfide Nitric Oxide Nitrogen Dioxide Oxygen Ozone Phosphine Sulfur Dioxide VOCs 16. Zero and calibrate the AirLink 6940XP’s sensors as described on page 33. 57 • Maintenance AirLink 6940XP Operator’s Manual...

  • Page 58: Cleaning The 10.0 Ev Or 10.6 Ev Pid Lamp

    Lamp Cleaning Procedure 1. Press and hold SUB for approximately 6 seconds until “OFF” shows on the display screen. 2. Unscrew and remove the sensor housing cap from the sensor housing base. Set aside. AirLink 6940XP Operator’s Manual Maintenance • 58...
  • Page 59 PID sensor near the face. Figure 7: Using Removal Tool 7. Squeeze the removal tool to push the tabs into the sensor slots until the electrode stack and lamp are released. 59 • Maintenance AirLink 6940XP Operator’s Manual...
  • Page 60 15. Ensure the lamp is completely dry and any visible signs of contamination are removed before reinstalling. AirLink 6940XP Operator’s Manual Maintenance • 60...
  • Page 61 20. Plug the sensor element into the sensor housing board. Ensure that the pins on the sensing element align with the sockets on the sensor housing board. 61 • Maintenance AirLink 6940XP Operator’s Manual...

  • Page 62: Replacing The Pid Lamp

    Ordering the Correct Replacement Lamp It’s important to order the correct replacement lamp for your PID sensor. 1. Look at the part number label on the side of your PID sensor. AirLink 6940XP Operator’s Manual Maintenance • 62...
  • Page 63 1. Press and hold SUB for approximately 6 seconds, until “OFF” shows on the display screen. 2. Unscrew and remove the sensor housing cap from the sensor housing base. Set aside. 63 • Maintenance AirLink 6940XP Operator’s Manual...
  • Page 64 9. Discard the old PID lamp. NOTE: At this point it is recommended that the finger cots be used on the fingers handling the lamp. Finger cots are included with the lamp cleaning kit. AirLink 6940XP Operator’s Manual Maintenance • 64...
  • Page 65 14. Plug the sensor element into the sensor housing board. Ensure that the pins on the sensing element align with the sockets on the sensor housing board. 65 • Maintenance AirLink 6940XP Operator’s Manual...

  • Page 66: Replacing The Pid Electrode Stack

    DO NOT use any metal objects or tools to remove the sensor. The electrode stack can last for the life of the PID sensor if the AirLink 6940XP is used in a very clean, controlled environment. When used in a heavily contaminated or dirty environment, the electrode stack may only last a month.
  • Page 67 4. Place the PID sensor face down on a flat clean working surface. NOTE: At this point it is recommended that the finger cots be used on the fingers handling the lamp. Finger cots are included with the lamp cleaning kit. 67 • Maintenance AirLink 6940XP Operator’s Manual...
  • Page 68 The lamp should be supported by the O-ring. 12. Continuing to hold the electrode stack between your forefinger and thumb, carefully insert the lamp into the lamp cavity in the sensor ensuring that the lamp remains in position. AirLink 6940XP Operator’s Manual Maintenance • 68...
  • Page 69 16. Press ADD to initiate the 1-minute startup (3.5 minutes for LEL versions). 17. Wait 10 minutes and then zero and calibrate the detector as described on page 35. 69 • Maintenance AirLink 6940XP Operator’s Manual...

  • Page 70: Replacing The Sensor

    1. Press and hold SUB for approximately 6 seconds until “OFF” shows on the display screen. 2. Unscrew the rain guard. 3. Unscrew and remove the sensor housing cap from the sensor housing base. Set aside. AirLink 6940XP Operator’s Manual Maintenance • 70...
  • Page 71 NOTE: Some electrochemical sensing elements are shipped with a shorting spring between two of the pins, this shorting spring MUST be removed before installing the sensing element. 71 • Maintenance AirLink 6940XP Operator’s Manual...
  • Page 72 Ethylene Oxide (EtO) 48 hours Formaldehyde (CH 10 minutes Hydrogen (H 2 hours Hydrogen Chloride (HCl) 12 hours Hydrogen Cyanide (HCn) Hydrogen Fluoride (HF) 2 hours Hydrogen Sulfide (H Nitric Oxide (NO) 12 hours AirLink 6940XP Operator’s Manual Maintenance • 72...
  • Page 73 Detection Gas Warm Up Time Nitrogen Dioxide (NO 2 hours Oxygen (O Ozone (O Phosphine (PH Sulfur Dioxide (SO VOCs 10 minutes 9. Zero and calibrate the detector as described on page 35. 73 • Maintenance AirLink 6940XP Operator’s Manual...

  • Page 74: Parts List

    ), for up to 100 ppm full scale 66-0006L-1 Sensor, ammonia (NH ), for up to 100 ppm full scale, long life/low humidity 66-0006-2 Sensor, ammonia (NH ), for 200 to 1,000 ppm full scale AirLink 6940XP Operator’s Manual Parts List • 74...
  • Page 75 ), LPIR type, 5.0% volume full scale 66-0068 Sensor, arsine (AsH ), 1.00 ppm full scale 71-0584 AirLink 6940XP Operator’s Manual (this document) 81-0002RK-01 Calibration cylinder, 50% LEL hydrogen in air, 34 liter steel 81-0002RK-03 Calibration cylinder, 50% LEL hydrogen in air, 103 liter...
  • Page 76 81-0176RK-04 Calibration cylinder, 25 ppm NH in nitrogen, 34 liter aluminum 81-0180RK-02 Calibration cylinder, 10 ppm NO in nitrogen, 58 liter 81-0180RK-04 Calibration cylinder, 10 ppm NO in nitrogen, 34 liter aluminum AirLink 6940XP Operator’s Manual Parts List • 76...
  • Page 77 Calibration cylinder, 5 ppm EtO in air, 34 liter aluminum 82-0003RK Electrode stack removal tool 82-0101RK Magnetic wand 82-0300RK Aluminum oxide powder PID lamp cleaning kit, with electrode stack removal tool, for 10.0 eV and 10.6 eV PID sensors’ lamps ONLY AirLink 6940XP Operator’s Manual Parts List • 77...

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