Yageo KEMET USEQGCK5000000 User Manual Download

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TO CO

Gas Sensing Evaluation Kit (Analog) USEQGCK5000000

The above information is believed to be correct but does not purport to be all inclusive and must be used only as a guide.

Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

TO Pyroelectric Infrared

Gas Sensing Evaluation Kit

USEQGCK5000000

User Guide

Rev. 4.3

MAR 2022

Summary of Contents for KEMET USEQGCK5000000

Page 1: ...t 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...

Page 2: ...the KEMET Gas Sensing Evaluation Tool Software 4 3 2 Connecting the TO Gas Sensing Evaluation Kit 4 4 SOFTWARE USER GUIDE 5 4 1 Starting the Software 5 4 2 Connecting Software to the Data Capture Boa...

Page 3: ...a flexible platform to start evaluation and design work with all KEMET TO 39 packaged gas sensors The software includes facilities to capture measured data and visualise and record it on a Windows PC...

Page 4: ...e select the setup exe file that has this icon This will start the installation process Figure 2 Installer Screen Follow the on screen instructions and enter the information required As part of the in...

Page 5: ...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 co...

Page 6: ...through the USB cable From the menu bar select the Device option and then COMXX Gas Sensor v3 1 VB as shown below Figure 4 Detector Connection If the device does not show up then click Rescan Ports S...

Page 7: ...reading the stream and does not stop the actual data capture boards data stream 4 3 1 Data Capture Settings It is possible to change some of the settings on the data capture board and also the filter...

Page 8: ...S root mean square output of each sensor channel calculated to the specified filter widths Figure 7 RMS Result Section The values are updated when the calculations are complete for each set of data wi...

Page 9: ...aking the window width to be 8 samples 10 Hz emitter frequency gives 8 samples per emitter period If we change this to 7 instead then we are looking at a different part of the waveform each time and i...

Page 10: ...fy that the value in the box is being used If the new value is not accepted for example if the minimum value is greater than the maximum value or text has been entered instead of a number then the pre...

Page 11: ...ile Writing Settings It is possible to choose to capture data indefinitely which will capture data until the software is instructed to stop or the PC runs out of disk space to specify the number of sa...

Page 12: ...to turn the sensor signals into a known concentration of gas is of course the requirement of most gas detection systems The gas concentration view of the KEMET Gas Sensing Evaluation Tool is available...

Page 13: ...th mentioning that the same set of coefficients cannot be used for different systems Each system must be calibrated individually as there are system differences such as sensor responsivity and emitter...

Page 14: ...t Moving Average This is simply the number of rolling average windows being averaged to provide the RMS data point that is passed to the concentration calculations Output Moving Average Size This chan...

Page 15: ...tem reset to default 255 Stop streaming data ok 6 2 Sampling and Signal Processing for KEMET TO Sensors KEMET s unique thin film pyroelectric sensors have excellent response at higher modulation frequ...

Page 16: ...ct it is recommended that sampling and filtering regimes are modified in accordance with the following diagrams The figure below shows a typical waveform from KEMET TO sensors when illuminated with a...

Page 17: ...ated to emitter design than KEMET sensors The signal size Sum on samples Sum off samples 7 EMITTER VOLTAGE SETTING As with all electronics there are tolerances for each of the components The gas demo...

Page 18: ...form After the signal has gone through a low pass and a high pass filter the signal changes to the same as shown in the KEMET software Figure 2 Input to ADC The signal is the same as is shown in the K...

Page 19: ...voltage across the emitter 1 Turn the voltage up until one of the signals has saturated looking out for the waveforms listed above for saturation 2 Slowly reduce the voltage until no evidence of satu...