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RKI Instruments 65-2650XL-04 Operator's Manual

Molecular property transmitter
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65-2650XL-04
TM
Molecular Property Spectrometer
M2A-XL Transmitter
Operator's Manual
Part Number: 71-0687
Revision: P1
Released: 7/29/24
RKI Instruments, Inc.
www.rkiinstruments.com

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  • Page 1 65-2650XL-04 Molecular Property Spectrometer M2A-XL Transmitter Operator’s Manual Part Number: 71-0687 Revision: P1 Released: 7/29/24 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 For most applications, typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage. 2 • 65-2650XL-04 Molecular Property Spectrometer M2A-XL Transmitter Operator’s Manual...
  • Page 3 We do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or shipment of parts back to RKI.

  • Page 4: Table Of Contents

    Selecting the Gas Type ............34 4 • 65-2650XL-04 Molecular Property Spectrometer M2A-XL Transmitter Operator’s Manual...
  • Page 5 Appendix C: Function Code 16 Registers ......61 65-2650XL-04 Molecular Property Spectrometer M2A-XL Transmitter Operator’s Manual • 5...

  • Page 6: Chapter 1: Introduction

    Chapter 1: Introduction Overview This chapter briefly describes the 65-2650XL-04 M2A-XL Transmitter. This chapter also describes the 65-2650XL-04 M2A-XL Transmitter Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the M2A. About the M2A Transmitter The M2A transmitter is a fixed mount, continuous-monitoring detector head.

  • Page 7: Specifications

    0 - 100% LEL ± 5% LEL Octane 0 - 100% LEL ± 5% LEL Pentane 0 - 100% LEL ± 5% LEL Propane 0 - 100% LEL ± 6% LEL 65-2650XL-04 Transmitter Operator’s Manual Chapter 1: Introduction • 7...
  • Page 8 M2A and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the M2A as described in this manual. 8 • Chapter 1: Introduction 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 9 S) or silicones present where sensor poisoning is a common problem • High-humidity environments where catalytic or IR sensors may not hold up • Environments more likely to have mixtures of hydrocarbons present 65-2650XL-04 Transmitter Operator’s Manual Chapter 1: Introduction • 9...

  • Page 10: Chapter 2: Description

    3/4 NPT Conduit Hub Magnetic Wand Window M2A-XL Junction Detector Junction Box External MPS LEL Detector Ground Stud Calibration Adapter/ Splash Guard 3/4 NPT Conduit Hub Figure 1: M2A External Components 10 • Chapter 2: Description 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 11 (near the M2A junction box is optimal for ease of calibration). The calibration adapter/splash guard also protects the detector from splashing water or direct water spray. 65-2650XL-04 Transmitter Operator’s Manual Chapter 2: Description • 11...

  • Page 12: Internal Description

    The Modbus output may be used to connect the M2A to a Modbus network. The terminal PCB also controls three relays: one fail and two gas alarm. 12 • Chapter 2: Description 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 13 The Modbus terminal strip is a three position plug-in style terminal strip and is the bottom terminal strip in the left terminal column. It allows connection of the M2A into a Modbus network. 65-2650XL-04 Transmitter Operator’s Manual Chapter 2: Description • 13...
  • Page 14 Alarm 2 LED RX LED Fail LED TX LED Magnetic Switches ENTER DOWN/NO RKI INSTRUMENTS UP/YES M2A-XL TRANSMITTER Push Button Control Switches OLED Display UP/YES DOWN/NO ENTER Figure 4: Control PCB Component Location 14 • Chapter 2: Description 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 15 Since displaying the Information Screen only requires the use of one switch, the wand may be used to show the Information Screen (see “Information Screen” on page 25). 65-2650XL-04 Transmitter Operator’s Manual Chapter 2: Description • 15...
  • Page 16 The alarm 2 LED is on when the M2A is experiencing an alarm 2 condition. • RX & TX LED’s These LED’s indicate data being received (RX) and transmitted (TX) when the M2A’s Modbus output is operating. 16 • Chapter 2: Description 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 17: Chapter 3: Installation & Startup

    3/4 NPT 4.86 5.66 Conduit Port, Plugged 2.82 3/4 NPT Conduit Port Ø 0.25, 2X 1.00 Figure 5: Outline & Mounting Dimensions, M2A Transmitter 65-2650XL-04 Transmitter Operator’s Manual Chapter 3: Installation & Startup • 17...
  • Page 18 3/4 NPT 2.70 Female 3.65 9.00 MAX Rubber Spacer, J-Box MPS LEL Detector 5.25 Calibration Adapter/ Splash Guard Figure 6: Outline & Mounting Dimensions, MPS LEL Remote Detector 18 • Chapter 3: Installation & Startup 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 19: Wiring The M2A Transmitter

    2 i nches (for Group B environments) or 1 8 Detector J-Box inches (for G roups C a nd D environments) MPS LEL Detector Calibration A dapter/Splash Guard Figure 7: MPS LEL Detector Wiring 65-2650XL-04 Transmitter Operator’s Manual Chapter 3: Installation & Startup • 19...
  • Page 20 Table 5: Wire Size for PWR/SIG Connections Max Distance to Max Distance to Max Distance to Controller Controller w/16 Gauge Controller w/14 Gauge w/18 Gauge Wire Wire Wire 2,500 ft. 5,000 ft. 8,000 ft. 20 • Chapter 3: Installation & Startup 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 21 11. Make controller, device, and relay connections as appropriate. If shielded cable is used for the PWR/SIG connections, connect the cable shield’s drain wire to an available chassis ground at the gas monitoring controller, recording device, or programmable controller. 65-2650XL-04 Transmitter Operator’s Manual Chapter 3: Installation & Startup • 21...

  • Page 22: Start Up

    Adjusting the Fresh Air Reading When the M2A is shipped from RKI Instruments, Inc., it is factory calibrated. If a full calibration is desired at startup, see “Calibration” on page 40. Verify that the M2A is in a fresh air environment (environment known to be free of the target gas and combustible or toxic gas vapors and of normal oxygen content, 20.9%).
  • Page 23 WARNING: This manual assumes the MPS sensor is operating in a background of fresh air. If the MPS sensor is not operating in a fresh air background (e.g. a monitoring background of nitrogen or argon), consult RKI Instruments Inc. before calibrating the sensor.
  • Page 24 SPAN w/Cal Gas?. NOTE: If setting the zero reading fails, see “Troubleshooting” on page 37 for recommended actions. 11. Leave the sample tubing connected to the regulator and the calibration cup. 24 • Chapter 3: Installation & Startup 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 25: Chapter 4: Operation

    M2A. 3. Release the DOWN/NO button when you are done viewing the Information Screen. The display will return to the normal operation screen within a couple of seconds. 65-2650XL-04 Transmitter Operator’s Manual Chapter 4: Operation • 25...

  • Page 26: 4 - 20 Ma Signal Output Operation

    • Gas reading alternates with ALARM-1 message • A2 LED is on Alarm 2 Increasing gas reading at or above the alarm 2 setpoint • Gas reading alternates with ALARM-2 message 26 • Chapter 4: Operation 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 27 NOTE: If the ENTER button is pressed while the M2A is in an alarm 1 condition, the A1 LED will flash but all other indications will remain unchanged. You cannot de-energize the alarm 1 relay until the gas reading falls below the alarm 1 setpoint. 65-2650XL-04 Transmitter Operator’s Manual Chapter 4: Operation • 27...
  • Page 28 • The gas reading is replaced by the FAIL message. • The fail relay de-energizes. NOTE: The fail alarm has a 30 second delay. Responding to a Fail Condition 1. Verify that the detector wiring is correctly and securely connected. 28 • Chapter 4: Operation 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 29 2. When the input power increases above 10.0 volts, the M2A will begin its warm-up sequence. 3. Verify that the M2A enters normal operation after its warm-up sequence. If necessary, perform a fresh air adjustment. See “Adjusting the Fresh Air Reading” on page 22. 65-2650XL-04 Transmitter Operator’s Manual Chapter 4: Operation • 29...

  • Page 30: Chapter 5: Configuration Mode

    If the currently displayed parameter is OK, press the ENTER button to proceed to the next parameter. Table 7 lists the M2A parameters you can set. Table 7 also lists the factory set value for each parameter. 30 • Chapter 5: Configuration Mode 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 31 2 circuit after the alarm 2 condition passes. ALARM-2 (relay reset) (LATCH) If set as SELF-RST, the M2A automatically resets the alarm 2 circuit after the alarm 2 condition passes. 65-2650XL-04 Transmitter Operator’s Manual Chapter 5: Configuration Mode • 31...
  • Page 32 If set to Disabled, the Auto Zero function is turned off. 4. When you have scrolled through all the adjustable parameters, SAVE IT? YES/NO appears on the display. 32 • Chapter 5: Configuration Mode 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 33 If you wish to save the adjustments made, press and release the UP/YES button. Config Saved is indicated on the display for a few seconds and the M2A returns to normal operation. 65-2650XL-04 Transmitter Operator’s Manual Chapter 5: Configuration Mode • 33...

  • Page 34: Chapter 6: Gas Type Mode

    This chapter describes how to use Gas Type Mode to select the M2A’s gas type. The gas type determines the target gas and detection range. CAUTION: The 65-2650XL-04 M2A-XL is factory setup for methane (CH ). Do not change the Gas Type setting.
  • Page 35 See “Chapter 5: Configuration Mode” on page 30 for a complete description of Configuration Mode. 7. When you have reviewed and accepted the last item in Configuration Mode by pressing the ENTER button, display will ask SAVE IT? YES/NO. 65-2650XL-04 Transmitter Operator’s Manual Chapter 6: Gas Type Mode • 35...
  • Page 36 Since a complete calibration is required, the calibration sequence will proceed without asking if you want to perform certain operations. 36 • Chapter 6: Gas Type Mode 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 37: Chapter 7: Maintenance

    PCB and on the bottom of the terminal PCB. 3. If the power difficulties continue, contact RKI for further instruction. 65-2650XL-04 Transmitter Operator’s Manual Chapter 7: Maintenance • 37...
  • Page 38 6. If the fail condition continues, contact • The detector was RKI for further instruction. exposed to gas during its 2-minute warmup period. • The detector is malfunctioning. • The terminal or display PCB is malfunctioning. 38 • Chapter 7: Maintenance 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 39: Calibration Frequency

    If an application is not very demanding, such as clean, temperature-controlled environments where the toxic or combustible target gas is not normally present, and calibration adjustments are minimal at calibration, RKI Instruments, Inc. recommends the following calibration frequency for the 65-2650XL-04 transmitter: •...

  • Page 40: Calibration

    M2A is in Calibration Mode. The output signal will not indicate current readings and the relays will not resume operating normally until the M2A is in normal operation again. 40 • Chapter 7: Maintenance 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 41 NOTE: The following procedure assumes that the target gas is present in a high enough concentration to affect the fresh air (zero) reading. If a fresh air environment can be verified, applying zero air to the detector is not necessary when setting the zero reading. 65-2650XL-04 Transmitter Operator’s Manual Chapter 7: Maintenance • 41...
  • Page 42 WARNING: This manual assumes the MPS sensor is operating in a background of fresh air. If the MPS sensor is not operating in a fresh air background (e.g. a monitoring background of nitrogen or argon), consult RKI Instruments Inc. before calibrating the sensor.
  • Page 43 SPAN w/Cal Gas?. NOTE: If setting the zero reading fails, see “Troubleshooting” on page 37 for recommended actions. 11. Leave the sample tubing connected to the regulator and the calibration cup. 65-2650XL-04 Transmitter Operator’s Manual Chapter 7: Maintenance • 43...
  • Page 44 M2A will return to normal operation. 10. Store the components of the calibration kit in a safe place. 11. Unscrew the regulator from the calibration cylinder. 44 • Chapter 7: Maintenance 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 45: Replacing Components Of The M2A

    10. Turn on or reconnect power to the M2A. NOTE: Allow the replacement detector to warm up for 15 minutes before you continue with the next step. 11. Calibrate the replacement detector as described in “Calibration” on page 40. 65-2650XL-04 Transmitter Operator’s Manual Chapter 7: Maintenance • 45...

  • Page 46: Chapter 8: Rs-485 Modbus Output

    The MODBUS terminal strip is located on the terminal PCB (see Figure 2). The following signals are available at the Modbus terminal strip: Table 10: Modbus Terminal Strip Signals Modbus Terminal Modbus Signal Name Label (RS-485 Name) Common 46 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 47 An M2A can be wired into an existing M2 Modbus system. The shape of the terminal PCB will be different but the wiring connections are identical and the ground jumper on the M2A must still be removed. 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 47...
  • Page 48 An M2A can be wired into an existing M2 Modbus system. The shape of the terminal PCB will be different but the wiring connections are identical and the ground jumper on the M2A must still remain installed. 48 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 49 ID = 2 ID = 3 ID = 4 ID = 127 Up to 128 M2As can be connected without a repeater Figure 12: Multiple M2As in a Two Branch Configuration 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 49...

  • Page 50: Using The M2A In A 4-Wire Modbus System

    If the currently displayed parameter setting is OK, press the ENTER button to proceed to the next parameter. Table 11 lists the M2A Modbus Mode parameters you can set. Table 11 also lists the factory set value for each parameter. 50 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 51 NOTE: All M2As on a Modbus network must be configured with the same baud rate and parity, and each M2A must have a unique slave ID. For an M2A to participate on a network, the ENABLED/DISABLED setting must be set to ENABLE. 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 51...

  • Page 52: Supported Modbus Functions

    2 = Normal 3 = Warm-up 4 = Fail 5 = Calibration 6 = Post-Calibration 7 = Low Power 8 = Setup [11] Gas Type Change 0=Not Changed 1=Changed 52 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 53 0 = Not Energized 1 = Energized Alarm 2 Relay Status 0 = Not Energized 1 = Energized Alarm 1 Relay Status 0 = Not Energized 1 = Energized 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 53...
  • Page 54 Register 26 Register 26 is the alarm 1 ON delay. Integer values are in seconds. Register 27 Register 27 is the alarm 1 OFF delay. Integer values are in seconds. 54 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 55 Register 36 Register 36 is calibration month (upper byte) and day (lower byte). This is zero based (e.g. January=0 and the 1st=0). Register 37 Register 37 is the calibration year. 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 55...
  • Page 56 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 56 • Chapter 8: RS-485 Modbus Output 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 57 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 65-2650XL-04 Transmitter Operator’s Manual Chapter 8: RS-485 Modbus Output • 57...

  • Page 58: Chapter 9: Parts List

    Hydrophobic membrane 45-6132RK Termination and ground jumper 61-0230 MPS LEL detector 71-0687 65-2650XL-04 M2A-XL Transmitter Operator’s Manual (this document) 81-0076RK-01 Zero air calibration cylinder, 34 liter steel 81-0076RK-03 Zero air calibration cylinder, 103 liter 81-1050RK Regulator, with gauge and knob, 0.5 liter/minute continuous flow, for 17 liter and 34...

  • Page 59: Appendix A: Control Button Quick Reference Guide

    • Enable or Disable Modbus Modbus Mode Press and Hold DOWN/NO and • Slave ID ENTER for 5 • Baud Rate seconds • Parity • Response Delay 65-2650XL-04 Transmitter Operator’s Manual Appendix A: Control Button Quick Reference Guide • 59...

  • Page 60: Appendix B: Plc And Dcs Device Wiring

    (24 VDC) - Alarm 1 Alarm Device Detector Controller Wiring (PLC, DCS) Alarm 2 Alarm Device Modbus Wiring Typical Alarm Wiring Shown Figure 13: PLC and DCS Device Wiring 60 • Appendix B: PLC and DCS Device Wiring 65-2650XL-04 Transmitter Operator’s Manual...

  • Page 61: Appendix C: Function Code 16 Registers

    Value must be an integer. Any decimals are omitted. The decimal point location is the same as specified in Register 1 of Function Code 03. Register 8 Register 8 is the alarm 2 trigger. 0=Decreasing 1=Increasing 65-2650XL-04 Transmitter Operator’s Manual Appendix C: Function Code 16 Registers • 61...
  • Page 62 Integer value is in seconds (0-60 in 5 second increments). Register 15 Register 15 is the calibration timeout. Value is in minutes (5, 10, 15, 20, 25, or 30). 62 • Appendix C: Function Code 16 Registers 65-2650XL-04 Transmitter Operator’s Manual...
  • Page 63 This register can be used to clear those flags. Table 19: Register 19, Clear Change Flags Bit(s) Value & Field [15:2] Unused Write “1” to this bit to clear “Gas Type Changed” flag 65-2650XL-04 Transmitter Operator’s Manual Appendix C: Function Code 16 Registers • 63...
  • Page 64 Function Code 16, Register 21, that value is automatically copied to Function Code 03, Register 40. The M2A firmware looks to Function Code 03, Register 40 for the remote configuration setting. 64 • Appendix C: Function Code 16 Registers 65-2650XL-04 Transmitter Operator’s Manual...

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