I have connected pts-01 sensor(it has two same map sensor inside 0-4bar 0-5V (for vacuum and lpg pressure) to JP9 diff amp.
ADC analog CH0 is calculated value from diff amp and it works i would use it for lpg fuel trim later...
analog CH1 is value in volts for lpg pressure and its displayed ok
problem is:
analog CH2 reads 0.0V when disconnected, if i connect 1 Volt wire, it reads 0V
When analog CH1 is connected to 3volt from sensor#1 (reads ok) and then when i connect 1 Volt from sensor#2 to CH2, CH1 then jumps (reads) to 5V, if i switch wires, then it reads 0v.
Is there problem with internal pullup?
I have VEMS v3.5 it sholud be like 3.3
Youtube link:
https://youtu.be/r8hH_3in7sU