MATEKSYS-4525DO reading 13.71 m/s airspeed while stationary

Other Hardware Sensors
1

Hello all,

I am trying to use the Mateksys-4525DO digital airspeed sensor with Teensy4.1 and TeensyDuino library to measure airspeed of a model rocket. The specific model of the sensor is the TE 4525DO-DS5AI001DP. Currently, the sensor is communicating via I2C and powered with 5V. I did not do any calibration of the sensor, because through research I did not see any mention of the need for any calibration. I am using the bolderflight library to read data from the board.

The problem is, even when everything is stationary, the sensor is supposedly reading around 13.71 m/s airspeed once the pressure differential is converted. After testing in a wind tunnel, we found that the sensor was reading incorrect airspeeds at multiple different true airspeeds. Does anyone have an idea of how I can fix this.

Thanks

2

Calibrate it and let us know what the results are.

3

airspeed -= 13.71; // job done

Unless you want to tell us more.
Pease read the "how to post" sticky.
Leo..

1 Like
4

Have you tried:

AirSpeed -= 13.71: // ?

5

do you have information on how to calibrate the sensor? i did not find any information on how to do this in the spec sheet or other online information

6

the difference between the true airspeed and measured airspeed was not a constant 13.71.

7

the difference between the true airspeed and the measured airspeed was not a constant 13.71. // job not done.

What more would you like to know?

8

Have you read the data sheet? https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+SheetMS4515DOB11pdfEnglishENG_DS_MS4515DO_B11.pdf4525DO-DS5AI001DP
It also states: EB values are valid only at the calibrated supply voltage. Post an annotated schematic showing exactly how you have wired this, be sure to include all parts, connections, power sources, etc.

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