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電子發燒友網>電子資料下載>類型>參考設計>EVAL-CN0338-ARDZ屏蔽

EVAL-CN0338-ARDZ屏蔽

2021-04-09 | pdf | 730.43KB | 次下載 | 3積分

資料介紹

This version (03 Jan 2021 21:51) was approved by Robin Getz.The Previously approved version (09 Feb 2016 20:45) is available.Diff

EVAL-CN0338-ARDZ Shield

The EVAL-CN0338-ARDZ shield is a Non-Dispersive Infrared(NDIR) carbon dioxide detector reference design. Complete with thermopile sensor, lamp, and light tube, this design interfaces directly with the dual 24-bit sigma delta converters on the EVAL-ADICUP360.

The EVAL-CN0338-ARDZ shield is optimized for CO2 sensing, but can accurately measure the concentration of a large number of gases by using thermopiles with different optical filters.

EVAL-CN0338-ARDZ shield uses NDIR(Non-Dispersive Infrared) physical sensing technique, it does not chemically react with the target gas or give off any toxic by products when measuring the gas concentration. Stable after long period of storage. With two calibrate method (standard beer-lambert calibration and modified beer-lambert calibration) the measurement range can up to 0% ~ 100%. With the temperature composition algorithm in firmware, the CN0338 eliminated temperature drift from idea gas law.

Connectors and configuration

The CN0338 firmware use P0.1 and P0.2 port of ADuCM360 as UART communicate port, for detailed description about how to connect P0.1 and P0.2 UART port to USER USB or DEBUG UBS, please reference EVAL-ADICUP360 Base Board Hardware

CN0338 Shield Board

The following is the CN0338 shield board picture (not to scale):

  • The lamp is connected through the DS1 connector and is powered by the external wall power supply provided on the EVAL-ADICUP360.
  • The light tube is made of PVC piping and is located in the large rectangular blocked off section of the EVAL-CN0338-ARDZ, and secured to the board using tie wraps.
  • J1, J2, J3, and J4 provide electrical and mechanical connector mounts to the SENSOR board. Please see the section below which describes the sensor board in more detail.

CN0338 Sensor Board

The following is the CN0338 sensor board picture (not to scale):

  • The sensor board should be mount to the shield board vertically, please plug the sensor board contact wing (lower part of sensor board without solder mask) to slot (at right part of board between J1 and J4) of shield board. Please make sure header J1,J2,J3,J4 at shield board plug into receptacles J4,J3,J2,J1 at sensor board firmly.
  • The thermopile sensor is located at the reference designator T1, which is at the opposite end of the light tube from where the lamp plugs in.
  • The sensor output goes directly from the EVAL-CN0338-ARDZ to the on board 24-bit sigma deltas of the EVAL-ADICUP360, where the signals are converted and process into the CO2 concentrations.

Schematics, PCB Layout, Bill of Materials

CN0338 Design and Integration Files

  • Schematics
  • Layout Files
  • Gerber Files
  • Assembly Drawing

Software examples

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