How do I change the input sensitivity of the 6024E DAQ?

[Callum]

I am trying to acquire a very small voltage signal but the option in DAQ properties only gives me +10V, -10V. I thought I would have the option of choosing a lower range as described in the user manual.

[Chris Matthews]

Are you using the Easy I/O library for DAQ or the Data Acquisition library functions?

For Easy I/O Library, when you pass in new ranges to the functions, it will automatically gain the signal. You can also set up the ranges by configuring a named channel in Measurement & Automation Explorer. For example,
for a read with a range of -1 to 1 (gain of 10) use:

nidaqAIScanOp ("daq::1!(0)", 1000, 1000.0, 1.0, -1.0,
kNidaqGroupByChannel, &actRate, &data);

If you are using the lower level Data Acquisition library functions. The DAQ_Start, DAQ_Op, AI_Read, etc. functions let you specify the gain. For a range of -1 to 1, set gain to 10. For example,

DAQ_Op (1, 1, 10, &data, 1000, 1000.0);

See the NI-DAQ Reference Manual for more info
rmation.

Best Regards,

Chris Matthews
National Instruments