Hello!
I am using MPXH6400A pressure sensor for measuring pressure inside a closed chamber. Clean air is being passed through the chamber. The reading were taken after allowing system to stabilize for 5 minutes. Day 1 reading for output voltage was 1.22 V (corresponding pressure value = 102.2865 KPa), and day 2 reading for output voltage was 1.18 V (corresponding pressure value = 99.0469 KPa), although all the system parameters were maintained.
Kindly explain the reason for the difference.
Hello,
A possible reason for this difference might be the temperature.
Please be aware that the maximum error over 0 °C to 85 °C is 1.5% in the MPXx6400A device.
Are you exposing your application to temperature changes?
In order to get more information about the temperature error, please refer to the figure bellow:
I hope this information will be useful for you.
If I misunderstood your question, feel free to let me know. I will be glad to help.
Have a great day.
David Diaz.