Mipex MIPEX-02 User manual

www.mipex-tech.com
ESAT.100200.00.06 UM
September 23, 2021
Page 1 of 43
SMALL-SIZE INFRARED GAS SENSOR
MIPEX-02-X-RX-X.1 G
Non EX version
USER MANUAL
ESAT.100200.00.06 UM

USER MANUAL
SMALL-SIZE INFRARED GAS SENSOR MIPEX-02-X-RX-X.1 G
ESAT.100200.00.06 UM
September 23, 2021
Page 2 of 43
THE SOLE PROPERTY OF SIA MIPEX. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF SIA MIPEX IS PROHIBITED.
INFORMATION CONTAINED IN THIS DOCUMENT IS THE SOLE PROPERTY OF SIA MIPEX.
ANY REPRODUCTION IN PARTS OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF
SIA MIPEX IS PROHIBITED.
Document revisions
Rev.
Date
Common changes
06
September
23, 2021
Change of software version to 25.8.
Adding information to Appendix C.1
05
November 06,
2020
Changing the description of the sensor and measurement range of
hydrocarbon gases.
04
September
29, 2020
Removal from the document of CO2 sensor with stainless steel type of
housings.
Introduction of non-safety design.
03
September
3rd, 2020
Adding to the document CO2 sensor, with stainless steel type of housings.
Changed fig.9 and fig.10.
02
August 21th,
2018
Corrected operation temperature range lower limit from -55 °C to -40 °C
(see. Table 2).
Removed description of firmware revision 25.67 (see Appendix C).
Corrected description of <CCS>, <CFS>, <CKS> and <INIT> commands
(see Appendix C.2.1, Appendix C.2.4).
01
February 08th,
2018
Released version.

USER MANUAL
SMALL-SIZE INFRARED GAS SENSOR MIPEX-02-X-RX-X.1 G
ESAT.100200.00.06 UM
September 23, 2021
Page 3 of 43
THE SOLE PROPERTY OF SIA MIPEX. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF SIA MIPEX IS PROHIBITED.
Table of contents
1. Introduction ............................................................................................................................... 4
1.1. List of abbreviations .......................................................................................................... 4
1.2. List of terms ....................................................................................................................... 4
2. Description ................................................................................................................................ 5
3. Technical specifications .......................................................................................................... 6
4. Handling precautions ............................................................................................................... 8
5. Installation and service ............................................................................................................ 9
5.1. Preparation ........................................................................................................................ 9
5.2. Mounting ............................................................................................................................ 9
5.3. Electrical conditions ......................................................................................................... 10
5.4. Getting started ................................................................................................................. 13
5.5. Connecting multiple sensors to single UART line ........................................................... 13
6. Storage and transportation .................................................................................................... 15
7. Warranty .................................................................................................................................. 16
8. Contacts .................................................................................................................................. 17
Appendix A. Sensor types and characteristics ....................................................................... 18
Appendix B. Connection diagram ............................................................................................. 25
Appendix C. UART communication protocol ........................................................................... 26
Appendix C.1. General information ........................................................................................ 26
Appendix C.2. Communication protocol commands .............................................................. 27
Appendix C.2.1. Commands for requesting measured data .......................................... 28
Appendix C.2.2. Commands for controlling operating mode .......................................... 31
Appendix C.2.3. Commands for requesting factory settings and properties .................. 31
Appendix C.2.4. Commands for sensor configuring and span calibrating ..................... 32
Appendix C.2.5. Commands for configuring net address ............................................... 35
Appendix D. Sensor configuration ........................................................................................... 36
Appendix D.1. Zeroing and span calibration .......................................................................... 36
Appendix D.2. Temperature dependence of zero adjustment ................................................ 39
Appendix E. Dust filter attaching .............................................................................................. 40
Appendix F. Troubleshooting ................................................................................................... 41

USER MANUAL
SMALL-SIZE INFRARED GAS SENSOR MIPEX-02-X-RX-X.1 G
ESAT.100200.00.06 UM
September 23, 2021
Page 4 of 43
THE SOLE PROPERTY OF SIA MIPEX. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF SIA MIPEX IS PROHIBITED.
1. INTRODUCTION
This user manual (UM) is intended to describe design and operation of small-sized gas sensor
MIPEX-02-X-RX-X.1 G (hereinafter MIPEX-02 or sensor). UM contains basic technical data,
recommendations and other information necessary for proper operation, maintenance and storage
of sensor.
SIA MIPEX reserves the right to make changes to this manual.
1.1. List of abbreviations
• ADC – Analog-to-Digital Converter.
• LEL – Lower Explosive Limit.
• LED – Light Emitting Diode.
• CGM – Control Gas Mixture.
• NDIR – Non-Dispersive Infra-Red.
• UART – Universal Asynchronous Receiver/Transmitter.
• CRC – Cyclic Redundancy Check.
• IP – Ingress Protection.
• ASCII – American Standard Code for Information Interchange.
• Hex – hexadecimal.
1.2. List of terms
• Target gas is a gas, which sensor is intended to detect and measure its concentration.
• Calibration gas refers to CGM containing that gas, used for sensor calibration.
Any command stated in this UM as <X>, where X stands for a command text consisted of any
number of characters, must be read and/or sent without the symbols “<” and “>”.

USER MANUAL
SMALL-SIZE INFRARED GAS SENSOR MIPEX-02-X-RX-X.1 G
ESAT.100200.00.06 UM
September 23, 2021
Page 5 of 43
THE SOLE PROPERTY OF SIA MIPEX. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF SIA MIPEX IS PROHIBITED.
2. DESCRIPTION
MIPEX-02 sensor is a small-size, ultra-low power consumption gas sensor that operates on
the NDIR (non-dispersive infrared radiation) principle to detect and determine the concentration of
hydrocarbon gases (methane - CH4 and propane - C3H8) in atmosphere
non-hazardous.areas. The sensor is used as a OEM component for portable and fixed gas detectors.
Has a long life time. The sensor's ultra-low power consumption allows it to be used in battery-
powered systems, including IoT applications.
Sensor has several modifications for specific needs. They differ by housing types, photodiode
and LED, calibration gases, interface types, measuring ranges etc. (see Appendix A).
Sensor is a smart integrated system and includes mirror optical system, photodiode and LED,
signal amplifiers, microcontroller, current driver of the infrared LED, UART interface signal generator
and supply forming voltage unit. Sensor microcontroller performs storage of unique sensor
calibration constants, processing of measurement results and concentration of measured gas, and
information exchange.
Sensor operating principle is based on NDIR technology, i.e. on selective infrared radiation
absorption by gas molecules.
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.
Table 1. Target gases for MIPEX-02 sensors
Target gas
Analytical tasks
description
Optical elements
code (see
Appendix A)
Spectral
characteristic
maximum
Notes
CH4
Analyzing a gas mixture
containing methane as
the main component.
1
3.31 µm
For optical elements
sensitivity to other
hydrocarbons, see
Fig. 7.
C3H8
Analyzing a gas mixture
containing heavy hydro-
carbons. The presence
of methane is negligible.
2
3.4 µm
For optical elements
sensitivity to other
hydrocarbons, see
Fig. 8.