Renesas RTD120D-EVK Software Manual
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Renesas RTD120D-EVK Software Manual

Renesas RTD120D-EVK Software Manual

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RTD120D-EVK
Thermopile CO
EVK
2
Overview
The RTD120D Thermopile CO
(RTD120D-EVK) monitors CO
Renesas RTD120D dual-thermopile detector. The
RTD120D-EVK
is intended to:
1. Help evaluate the RTD120D detector in a
microcontroller-based system
2. Show how to monitor the performance of an NDIR
CO
sensor solution based on Renesas
2
thermopiles
3. Demonstrate the process of calibrating such a
detection system
Right out of the box, the EVK can begin measuring
CO
levels. Simply attach the LCD module to the
2
main EVK board (if it is not already attached), and
then connect the provided USB cable to the board
and to a power source, such as a phone charger or a
PC USB port. The LCD will display the software title
and version number briefly, then after a 30-second
warm-up it will display CO
ppm (parts per million). It will also display readings of
other sensors on the board; that is, barometric
pressure, relative humidity, and ambient temperature.
In addition to the stand-alone operation described
above, the EVK can provide advanced functionality
when connected to a host computer.
This document explains how to use the EVK with
application software running on a host PC in order to
provide additional capability, including:
1. Remote monitoring of CO
barometric pressure, relative humidity, and
ambient temperature
2. Graphical display of data
3. Calibration of the CO
enhanced visual feedback
R36US0002EU0100 Rev 1.00
Aug 26, 2021
Detector EVK
2
levels using the
2
concentration readings in
2
concentration,
2
detection process with
2
Evaluation Kit Software Manual
Features
▪ CO
Detector Evaluation Software running on
2
®
Windows
, or end-user supplied software
communicating via text commands or ModBus
over USB, using any OS
▪ Extend functionality to simplify evaluation of
RTD120D Thermopile Detector
▪ Communicate with Thermopile CO
using ModBus or simple serial commands for
terminal CLI or end-user supplied software
▪ Capture, graph, process, and export CO
concentration and other performance data
▪ Software supports calibration of CO
algorithm with an interactive GUI environment
Detector EVK
2
2
detection
2
Page 1
© 2021 Renesas Electronics
®

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Summary of Contents for Renesas RTD120D-EVK

  • Page 1 , or end-user supplied software (RTD120D-EVK) monitors CO levels using the ® communicating via text commands or ModBus Renesas RTD120D dual-thermopile detector. The over USB, using any OS RTD120D-EVK is intended to: ▪ Extend functionality to simplify evaluation of 1. Help evaluate the RTD120D detector in a...

  • Page 2: Table Of Contents

    USB connection. When the EVK powers up, it immediately operates as a stand-alone CO detector as described in the RTD120D-EVK CO EVK User Manual, with the integrated LCD and push-button switches acting as the primary user interface. In the background, the USB interface is continually monitored for an incoming connection.
  • Page 3 EVK in this mode. In order to allow strings of characters to be pasted into such a terminal program without any data loss, Renesas recommends to configure a 5 millisecond delay between sent characters in the terminal program’s settings. For example, in Tera Term, the following setup works reliably when pasting text into the terminal window (MENU: Setup - Serial Port...)

  • Page 4: Modbus Example: Daqfactory

    ModBus application. Note: After installing DAQFactory, either version can be run from the Start menu; however, Renesas recommends running the Express version because it does not have a time limit. If you require more capability beyond the needs R36US0002EU0100 Rev 1.00...

  • Page 5: Board Connections

    RTD120D-EVK Evaluation Kit Software Manual of the RTD120D-EVK, you can later purchase one of the more full-featured versions of DAQFactory directly from AzeoTech. (DAQFactory and AzeoTech are registered trademarks of AzeoTech, Inc. Renesas has no affiliation with AzeoTech.) Board Connections A USB (B-micro) connector is used to power the board and for communications with a host computer.
  • Page 6 RTD120D-EVK Evaluation Kit Software Manual 2. In the Serial Port Configuration dialog, set Serial Port # (COM) to the port number the EVK is connected to (e.g., 4 for COM4). To determine the correct COM port number, you may need to open Device Manager from the Windows Start menu to observe which COM port appears in response to connecting the USB cable between the kit and your PC.

  • Page 7: Monitoring Co 2 Concentration And Sensor Readings

    ▪ With a GUI, using a connected PC for a more interactive and visual experience This section describes the GUI-based method of CO calibration. To calibrate the kit without using a connected host computer (instead using the LCD and pushbutton UI), see the RTD120D-EVK CO EVK User Manual. 2.5.1...

  • Page 8: Calibration Procedure

    RTD120D-EVK Evaluation Kit Software Manual such as for calculating CO concentration or calibrating the kit so that accurate CO concentration determination is possible. Calibration consists of allowing various gas mixtures of known CO concentration to enter the gas chamber (where CO concentration is measured), and storing in memory the resulting “raw”...
  • Page 9 RTD120D-EVK Evaluation Kit Software Manual 3. Follow the steps using the GUI. Table 1. Calibration Steps (GUI) Button to “accept” raw value or Step save all results Note Determine the “raw” value for Zero gas (N). Mandatory (typically pure Nitrogen) Determine the “raw”...
  • Page 10 RTD120D-EVK Evaluation Kit Software Manual 3. Confirm that the displayed page appears similar to the following screen-shot, and monitoring of the kit's data immediately begins. Watch as the three graphs accumulate and show data arriving from the right side of each plot as time proceeds.
  • Page 11 RTD120D-EVK Evaluation Kit Software Manual 6. The amount of change of the raw value in the last several samples is displayed in the plot labeled “Variation (peak-to-peak)”. In this plot, there is a normal (green) and a magnified (blue) trace.
  • Page 12 RTD120D-EVK Evaluation Kit Software Manual 9. To write this calibration point to flash memory, press: 10. Now you can turn off the gas supply valve if you are using a calibration gas canister, or otherwise remove the reference gas source (or remove the kit form the gas chamber, plastic bag, etc.). If you are using outdoor air as the reference gas then nothing more needs to be done.

  • Page 13: Appendix A: Background Information

    RTD120D-EVK Evaluation Kit Software Manual Appendix A: Background Information The following high-level block diagram introduces the structure of this EVK, followed by a basic functional description. Character LCD Antenna USB Connector (16 character x 2 lines) Connector pushbutton switches GPIO...

  • Page 14: Appendix B: Terminal Mode Commands

    RTD120D-EVK Evaluation Kit Software Manual Appendix B: Terminal Mode Commands The following table provides a list of supported commands available in terminal mode. Table 2. Terminal Commands Command Parameters Description / Example Show brief help text Turn lamp ON (overridden by automatic ON/OFF)
  • Page 15 RTD120D-EVK Evaluation Kit Software Manual Table 2. Terminal Commands (Cont.) Command Parameters Description / Example =config2 Report configuration settings (group 2): ▪ s1_ppm ▪ s2_ppm ▪ s3_ppm ▪ s4_ppm ▪ s1_raw ▪ s2_raw ▪ s3_raw ▪ s4_raw ▪ cal_slope =vars1 Report variables (group 1): ▪...
  • Page 16 RTD120D-EVK Evaluation Kit Software Manual Table 2. Terminal Commands (Cont.) Command Parameters Description / Example =raw_uf Get un-filtered RAW value =raw Get filtered RAW value =co2_on Get CO thermopile reading with lamp ON =co2_off Get CO thermopile reading with lamp OFF...

  • Page 17: Revision History

    RTD120D-EVK Evaluation Kit Software Manual Table 2. Terminal Commands (Cont.) Command Parameters Description / Example (unused) compute droop (unused) Set calibration raw #4 point save_to_flash Save parameters to flash memory Revision History Revision Date Description 1.00 Aug 26, 2021 Initial release.
  • Page 18 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.

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