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TO CO
Gas Sensing Evaluation Kit (Analog) USEQGCK5000000
2
TO Pyroelectric Infrared
CO
Gas Sensing Evaluation Kit
2
USEQGCK5000000
User Guide
Rev. 4.3
MAR 2022
The above information is believed to be correct but does not purport to be all inclusive and must be used only as a guide.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
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Summary of Contents for Yageo KEMET USEQGCK5000000
- Page 1 TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 TO Pyroelectric Infrared Gas Sensing Evaluation Kit USEQGCK5000000 User Guide Rev. 4.3 MAR 2022 The above information is believed to be correct but does not purport to be all inclusive and must be used only as a guide. ©...
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Page 2: Table Of Contents
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 TABLE OF CONTENTS INTRODUCTION ......................3 GETTING STARTED ..................... 3 Kit Contents ......................3 Minimum System Requirements ................3 INSTALLATION ......................4 Installing the KEMET Gas Sensing Evaluation Tool Software ......... 4 Connecting the TO Gas Sensing Evaluation Kit ............ -
Page 3: Introduction
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 INTRODUCTION This document describes the KEMET demonstrator kit that enables simple and efficient data visualisation and capture from KEMET TO-39 packaged sensor components. These high- performance thin film pyroelectric sensor products are typically used in NDIR gas sensing, process analytical measurement, IR spectroscopy and medical diagnostic applications. -
Page 4: Installation
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 3. 450 MB of available hard-disk space for installation, additional free space required for storing CSV files 4. 1,024x768 display (1,280x1,024 recommended) 5. Local administrative rights to install device drivers 6. .NET Framework 4.5 7. -
Page 5: Software User Guide
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 SOFTWARE USER GUIDE The KEMET Gas Sensing Evaluation Tool Data Capture software runs on Microsoft Windows PCs and communicates with the Evaluation Kit USEQGCK5000000’s PCB, which enables easy testing of KEMET TO packaged sensors. The software provides an interface to the analog circuits and A-D (Analog to Digital) converter, which are provided by the Silicon Labs C8051F350. -
Page 6: Connecting Software To The Data Capture Board
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Connecting Software to the Data Capture Board To connect to the data capture board make sure the board is powered and connected to the PC through the USB cable. From the menu bar select the Device option and then COMXX : Gas Sensor v3.1 VB as shown below. -
Page 7: Data Capture Board Control
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Data Capture Board Control The current settings used on the data capture board are displayed and the root mean square (RMS) values update at a rate depending on filter width and emitter frequency. Figure 6 –... -
Page 8: Rms Values
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Emitter Frequency (Hz): The frequency with which the board pulses the IR emitter can be set between 2 Hz and 30 Hz. Emitter Duty Cycle: This can be set with two options, either 25% or 50% duty cycle. RMS Width: The filter width of the RMS can be increased by a number of periods from 1 up to 1,000. -
Page 9: Viewing Live Data - Oscilloscope Window
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 for some integer ‘n’. This ensures that the RMS is taking one period or a multiple of periods effectively. Taking values of ‘n’ that are not integers will produce a varying output in terms of RMS due to sampling more or less than one complete waveform, as shown below. - Page 10 TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Figure 10 – Oscilloscope Window - Normal View The oscilloscope value display range can be adjusted by two different methods: 1. By entering the maximum and minimum values in the text box at the end of each axis. When entering the values, the color of the box will change to signify that the value in the box is not currently being used for the display.
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Page 11: Saving Data To Csv (Comma Separated Value) File
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 4.5 Saving Data to CSV (Comma Separated Value) File From the file menu on the main screen it is possible to save the captured data to Comma Separated Value files, for analysis in Matlab, Excel, etc. After selecting Save to CSV a pop- up window Capture Data to CSV File will appear requesting information about how long the software should save data for. -
Page 12: Concentration View
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 At any time while the software is capturing data to a file it is possible to stop the data capture by selecting Stop CSV Capture from the file menu. CONCENTRATION VIEW The ability to turn the sensor signals into a known concentration of gas is of course the requirement of most gas detection systems. - Page 13 TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Figure 15 – Save Coefficients The next time this system is connected to the software the coefficients can be loaded from the file using the Load Coefficients option. It is worth mentioning that the same set of coefficients cannot be used for different systems.
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Page 14: Signal Processing
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 If the CSV options is selected from this view, there is an additional option of saving the concentration values calculated. This must be opened and selected to save concentration data. Figure 17 – CSV Options from Concentration View Signal Processing RMS Rolling –... -
Page 15: Commands Description
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 Commands Description Command Description Response Character Code “ok” Null command Get product details Product string “Set number of channels (1, 2 or 4 Set number of accepted)” channels “ok” or “Error setting not accepted” “Send channel number (1, 2, 3 or 4 accepted)”... - Page 16 TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 film device structure with a low noise transimpedance amplifier, which includes a 31 Hz first order low pass filter. To maximize the competitive advantage offered by this product it is recommended that sampling and filtering regimes are modified in accordance with the following diagrams.
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Page 17: Emitter Voltage Setting
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 1. For each different NDIR design the timings for switch on (t2-t1) and switch off (t4-t3) time will have to be measured, as they are more correlated to emitter design than KEMET sensors. The signal size = Sum (on samples) –... -
Page 18: Method
TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 The graph can be explained by following the output of the sensor through the hardware signal conditioning components. Using an oscilloscope to capture the output on the pin of the TO packaged sensor shows the following the graph when the output is saturated. Figure 19 –... - Page 19 TO CO Gas Sensing Evaluation Kit (Analog) USEQGCK5000000 environments that have less CO than average environmental CO levels, it will be necessary to reduce the voltage slightly further again to ensure that when the level of absorbing gas drops, the additional signal strength will not cause the output to saturate. The emitter board has a potentiometer for altering the voltage across the emitter.
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