I am a new user of DAQ. I am trying to acquire voltage value from analog input using AI sample channel.vi. Why does the DAQ read 10 all the time even though there is no input connected at the analog input terminal?

[voltage and current signals]

i am trying to acquire voltage and current value from analog input AI0 and AI1 sample channels.

but why does the DAQ read both de current and voltage values all the same?