[Analog Input Wrong Measure]

Firstly, I want to thank everyone who answers very kindly,

I will follow your advice to do a small calibration routine to create an offset

 

Thank you, 

 

Ramiro

 

 

[Analog Input Wrong Measure]

I'm use a V350-35-T2 and IO-AI4-AO2, and connect a pressure transmiter (2 wires) to AN0 (V350) (10 bit), the pressure transmitter range is 0-10 barg 

I configured the MI0 with parameters: 204 to 1023 and 0 to 1000 

At atmospheric pressure the measure should be 0 barg/204 but in online test the measure of count is 203

I connected an ampherimeter to measure the real current and it measure 4 mA (in online test I read 203 count)

I changed the connection of pressure transmitter to AI0 (12 bit) (of IO-AI4-AO2) and parameters now are: 819 to 1095 and 0 to 1000

I read at 4 mA 816 count, it is not correct measure (819)

Any explanation about it? solution? 

Thank you

PD: Excuse me about my bad English