The AI Strain Gage DAQmx Create Virtual Channel.vi
input. The Unit
is set strain(ε, m/m) as default value. You could change the unit setting to From Custom Scale.
If you select this value, you must wire a custom scale name to the custom scale name
input. For more detail, please refer to the AI Strain Gage part of DAQmx Create Virtual Channel (VI) - NI-DAQmx Help