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Mipex -02 Series User Manual

Small-size explosive gas measuring sensor
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Optosense LLC
USER MANUAL
SMALL-SIZE EXPLOSIVE GAS MEASURING
Design department
SENSOR MIPEX-02-X-X-X.1 X (RX)
SMALL-SIZE EXPLOSIVE GAS MEASURING
SENSOR MIPEX-02-X-X-X.1 X (RX)
USER MANUAL
ESAT.413347.005 UM
ESAT.413347.005 UM
Revision 3.0
January 19th, 2017
Page 1 of 46
THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.

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  • Page 1 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) SMALL-SIZE EXPLOSIVE GAS MEASURING SENSOR MIPEX-02-X-X-X.1 X (RX) USER MANUAL ESAT.413347.005 UM ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 1 of 46 THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.
  • Page 2 Excluded temperature zero adjustment manual mode (see Appendix D.2). October 21 Formatting. 2016 Added:  Table 1 “target gases for MIPEX-02 sensors”.  Response time when dust filter is applied.  Graphs of sensor power consumption.  Section 6.5 “Connecting multiple sensors to single UART line”.

  • Page 3: Table Of Contents

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table of contents Introduction ..........................4 1.1. List of abbreviations ......................4 1.2. List of terms ........................4 Description ..........................5 Technical specifications ......................7 Intrinsic safety ........................9 Handling precautions ......................

  • Page 4: Introduction

    1. INTRODUCTION This user manual (UM) is intended to describe design and operation of small-sized gas sensor MIPEX-02 (hereinafter MIPEX-02 or sensor). UM contains basic technical data, recommendations and other information necessary for proper operation, maintenance and storage of sensor.

  • Page 5: Description

    С – measured gas concentration; – photodetector signals amplitude. Differential dual wavelength method allows eliminating of water vapor, optical elements contamination and other non-selective hindrances influence. Target gases available for MIPEX-02 are listed in Table 1. ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 5 of 46 THE SOLE PROPERTY OF OPTOSENSE LLC.
  • Page 6 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 1. Target gases for MIPEX-02 sensors Optical elements Spectral Analytical tasks Target gas code (see characteristic Notes description Appendix A) maximum For optical elements Analyzing a gas mixture sensitivity to other 3.31 m...

  • Page 7: Technical Specifications

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 3. TECHNICAL SPECIFICATIONS Table 2. General specifications (for available options see Appendix A) Gas sampling method Diffusion Operating principle Non-Dispersive Infra-Red (NDIR) +С Н Target gas...
  • Page 8 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 3. Measurement specifications 0…1.5 0…2.5 Measurement range, % vol. 0…5 0…100 ± 0.1% vol. or ± 5% of indication (whichever is greater) for CH Basic variability (+20…+25 ⁰C) ±...

  • Page 9: Intrinsic Safety

    ) within the range of +3.0…+5.0 V, with the output power (P ) range of 0.02…0.25 W in accordance with IEC 60079-0, IEC 60079-11, IEC 60079-14 and whose parameters conform MIPEX-02 intrinsic safety values pointed above. Current provided by power supply unit must be 25 mA ≤ I ≤ 450 mA.

  • Page 10: Handling Precautions

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 5. HANDLING PRECAUTIONS  Do not use damaged sensor. It must be repaired only by personnel authorized by manufacturer.  Keep sensor out of contact with aggressive substances e.g. acidic environments, which can react with metals, as well as solvents, which may affect polymeric materials.

  • Page 11: Installation And Service

     Harwin H3183-05;  Harwin H3182-05 for MIPEX-02-X-X-X.1 A modifications. Sensor pinout is shown in Appendix A, Table 7. End user instrument design has to provide that sensor is free of excessive pressure on its housing, ingress of dust, dirt and condensed moisture, as these factors may affect the accuracy of measurement.

  • Page 12: Electrical Conditions

    10 mA (see Fig. 1). After that sensor switches to the normal current consumption mode.  During operation, MIPEX-02 has pulsed current consumption. Pulse repetition period is 10 ± 20% ms (depends on ambient temperature). ...
  • Page 13 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) -0.5 -0.1 Time, s Fig. 1. Typical sensor voltage drop after power up (input voltage 3.3 VDC, load resistance R = 100 Ohm) -0.1 -0.015 -0.01 -0.005...
  • Page 14 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) -0.1 -0.02 -0.01 0.01 0.02 0.03 Time, s Fig. 3. Typical sensor voltage drop when UART is active (<@> command) Fig. 4. Typical barrier voltage drop waveform (3.3 V input) ESAT.413347.005 UM...
  • Page 15 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Fig. 5. Typical current consumption waveform (3.3 V input, R = 30 Ohm, C = 20 µF) ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 15 of 46...

  • Page 16: Getting Started

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 6.4. Getting started  During first 40 seconds after the power is up sensor does not return the measured concentration value (the value is displayed as “-1”, hex: “8001”, see Table 13).
  • Page 17 USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Fig. 6. Connection diagram of multiple sensors to single UART line Resistors are calculated as follows: 1. Determine the quantity of sensors N that should be connected to single UART line.

  • Page 18: Low Power Consumption Mode

    USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 6.6. Low power consumption mode It is possible to switch sensor to low power consumption mode, which corresponds to indicator mode. To switch sensor power consumption mode, resetting its power supply is not necessary.

  • Page 19: Storage And Transportation

    USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 7. STORAGE AND TRANSPORTATION Transportation can be done by all means of transportation in covered vehicles as well as in a heated pressurized plane compartments in accordance with the rules of cargoes transportation actual for the respective type of transportation.

  • Page 20: Warranty

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 8. WARRANTY Manufacturer guarantees sensor compliance with specifications and requirements stated in this UM if customer follows operating, transportation and storage terms. During warranty period, manufacturer replaces or repairs for free all its products that do not operate because of production fault.

  • Page 21: Contacts

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) 9. CONTACTS MIPEX TECHNOLOGY / Оptosense LLC 27AD, Engelsa prospekt, St. Petersburg, 194156, Russia Tel/fax: +7 (812) 633-0594, 633-0595 web: http://www.mipex-tech.com e-mail: info@mipex-tech.com support: support@mipex-tech.com ESAT.413347.005 UM Revision 3.0...

  • Page 22: Appendix A. Sensor Types And Characteristics

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) APPENDIX A. SENSOR TYPES AND CHARACTERISTICS MIPEX-02-B-C-D.1 X (RX) Application: R – calibration gas and range* X – temperature class and accuracy** Pins length: Not specified – 5.75 mm A –...
  • Page 23 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 5. Metrological properties of sensor (RX-code) Temp. range, °C Part number Target gas Calibration gas Meas. range, % vol. 0…2.5 MIPEX-02-1-I-D.1 X (00) 0…5 MIPEX-02-1-I-D.1 X (10) -10…+40...
  • Page 24 C4H10 C6H14 C2H4 CGM concentration, % LEL Fig. 7. Typical sensitivity of MIPEX-02-1-X-X.1 X (target and calibration gas is CH ) to other hydrocarbons The table shows basic variability of MIPEX-02 sensor readings. For each sensor modification, readings variability stated in Table 6 is provided within a temperature range determined by a sensor RX-code (see Table 5).
  • Page 25 SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) C3H8 C4H10 C5H12 C6H14 CGM concentration, % LEL Fig. 8. Typical sensitivity of MIPEX-02-2-X-X.1 X (target and calibration gas is C ) to other hydrocarbons C3H8 C2H6 C4H10 C6H14 C2H4 CGM concentration, % LEL /СН...
  • Page 26 SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Fig. 10. MIPEX-02-X-X-1.1 X (housing type “1”) overall dimensions in millimeters Fig. 11. MIPEX-02-X-X-2.1 X (housing type “2”) overall dimensions in millimeters Fig. 12. MIPEX-02-X-X-3.1 X (housing type “3”) overall dimensions in millimeters ESAT.413347.005 UM...
  • Page 27 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 7. Sensor pinout Purpose UART, TxD output UART, RxD input – ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 27 of 46 THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.

  • Page 28: Appendix B. Connection Diagram

    RxD input TxD output MIPEX-02/03 MIPEX-02 interface board Fig. 14. Connection diagram for MIPEX-02 via MIPEX-02/03 interface board (ESAT.200200.00) during span calibration (SPC – pins for measuring sensor power consumption; V is a voltmeter) ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 28 of 46 THE SOLE PROPERTY OF OPTOSENSE LLC.
  • Page 29 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Fig. 15. Example of connecting MIPEX-02 to “ia” intrinsically safe circuit ESAT.413347.005 UM Revision 3.0 January 19th, 2017 Page 29 of 46 THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.

  • Page 30: Appendix C. Uart Communication Protocol

    Sensor firmware could be updated or downgraded (e.g. to version 25.4/24.4). Contact support for available compatible versions and instructions. Sensor is manufactured with firmware version 25.6/24.6. Appendix C.1. General information Data exchange with MIPEX-02 sensors is performed via UART interface:  Sensor has symbol rate of 9600 baud. ...

  • Page 31: Appendix C.2. Communication Protocol Commands

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Appendix C.2. Communication protocol commands There are several types of commands used for communication with sensor: commands for requesting measured data and diagnosing (see Appendix C.2.1);...
  • Page 32 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 8. Structure of response on <@> and <@*X> commands Command <@> (hex: “40 0D”) Command <@*X> (hex: “40 2A X 0D”) Byte number @ (hex: “40”) Byte data Table 9.
  • Page 33 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 12. Bits of status bytes description Bit number of Bit number of Status word <DATAE2> <DATAE> Description Recommendations compliance status-bytes status-byte – – – Normal mode, static temperature Sensor is warming up.

  • Page 34: Appendix C.2.2. Commands For Controlling Operating Mode

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Appendix C.2.2. Commands for controlling operating mode USER Request syntax Response description Command description mode mode Response contains of word Switches commands level from “OEM” or, if the password is “USER”...

  • Page 35: Appendix C.2.4. Commands For Sensor Configuring And Span Calibrating

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Appendix C.2.4. Commands for sensor configuring and span calibrating USER Request syntax Response description Command description mode mode Intended for checking current auto- AZERO ON zeroing...
  • Page 36 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) USER Request syntax Response description Command description mode mode Returns date of the last span DATEZC? DD.MM.YY calibration operation. Writes the last date of span DATEZC DD.MM.YY OK calibration to sensor memory DATEZC DD.MM.YY...
  • Page 37 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) USER Request syntax Response description Command description mode mode Turns off displaying of sensor status with nega- INDSIG OFF tive values in concentra- tion field. Turns on displaying of...

  • Page 38: Appendix C.2.5. Commands For Configuring Net Address

    Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Appendix C.2.5. Commands for configuring net address USER Request syntax Response description Command description mode mode 4 bytes in ASCII format: “0D” symbol, sensor’s hexadeci- Returns sensor’s net address mal net address in range 00…FF and “0D”...

  • Page 39: Appendix D. Sensor Configuration

    Zeroing and span calibration should be carried out by qualified personnel outside of an explosive area under normal conditions in the following sequence: Communicate sensor via UART interface (example based on MIPEX-02/03 interface board ESAT.200200.00 is shown on Fig. 17; gas adapter ESAT.200210.00 is available as an option).
  • Page 40 Gas adapter MIPEX-02 USB cable MIPEX-02/03 interface board Fig. 17. Typical scheme of MIPEX-02 span calibration Converting of % vol. to % LEL is performed according to the following equation: 100 × C LFSCL = C(h) where: LFSCL is component concentration, % LEL;...
  • Page 41 USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) С is component concentration, % vol.; С(h) is the lower explosive limit of component, % vol. (constant); For methane C ( h ) = 4.4% vol.; for propane C ( h ) = 1.7% vol.

  • Page 42: Appendix D.2. Temperature Dependence Of Zero Adjustment

    USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Appendix D.2. Temperature dependence of zero adjustment It is allowed for user to adjust the temperature dependence of zero. To do this split any temperature range into equal intervals about 12.5 °C each. Each interval is used for corresponding operating temperature.

  • Page 43: Appendix E. Dust Filter Attaching

    USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) APPENDIX E. DUST FILTER ATTACHING To improve sensor operation reliability, dust filter should be attached to sensor surfaces. For sensor housing types “1” and “3”, only top filter (ESAT.717100.001; see Fig. 20) should be applied.

  • Page 44: Appendix F. Troubleshooting

    USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) APPENDIX F. TROUBLESHOOTING If there is suspicion that sensor returns wrong data and / or operates improperly, it is necessary to check its status by sending command <DATAE2> (see Appendix C.2.1). It returns concentration value and two status bytes.
  • Page 45 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 17. Structure of response to <F> command Command <F> (hex: “46 0D”) response Byte number Byte data Data description Hex: “0E” Special character Sensor temperature expressed in ADC counts Hex: “09”...
  • Page 46 Optosense LLC USER MANUAL SMALL-SIZE EXPLOSIVE GAS MEASURING Design department SENSOR MIPEX-02-X-X-X.1 X (RX) Table 18. Status word values description Status Priority Description Recommendations word level Normal operating mode, temperature – 12 (lowest) is static. Sensor is warming up. Do not perform span calibration.

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