I am using my Raspberry Pi 3 Model P with a MCP3008 to read the pressure (Chilled Water) for an HVAC application from a Pressure Transmitter Wika A-10.
- Power Supply: 8 - 30 V
- Pressure Range: 0 - 16 bar
- Signal 0 - 5 V.
In fact, the pressure is always inferior than 10 bar, so my signal is always inferior than 3.3 V.
I connected my transmitter as below:
However the reading is not really accurate. Is it because of the 3.3V from Raspberry Pi which is not accurate enough? Do you have any alternative to propose?
Thank you very much,