Measure vacuum pressure via MPXV6115V

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Measure vacuum pressure via MPXV6115V

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LORDSUN1
Contributor I

When I used the Arduino board and the MPXV6115V sensor to measure the vacuum pressure, the output from the Vout pin shows the value around 900, which should be 1023 (due to the ADC function of the Arduino board).

I am not sure why this happens. Is it normal for the vacuum pressure sensor?

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Xiyang,

 

Which Arduino board are you actually using and what is the voltage (in Volts) on the Vout pin? You should see something around 4.6V with no pressure applied and 5.0V supply voltage:

 

Capture.JPG

 

Best regards,

Tomas

   

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Xiyang,

 

Which Arduino board are you actually using and what is the voltage (in Volts) on the Vout pin? You should see something around 4.6V with no pressure applied and 5.0V supply voltage:

 

Capture.JPG

 

Best regards,

Tomas

   

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LORDSUN1
Contributor I

Thanks for your kind notification.

Yes, you're right. The arduino board I used is the Arduino Mega 2560, the output from the pressure sensor is around 900, due to the Analog-digital-conversion, thus the output voltage should be 900/1023*5 V, around 4.5V.

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