How to hange reference of AIN pin

4 posts / 0 new

Tue, 02/28/2017 - 07:36

BruceYuan

Hi,

I am new to this forum and my background was in civil engineering. My question might not be very clear or professional but I am still looking forward to receiving some answers and helps.

I am wondering if I can change the reference or the resolution of AIN pin so that it can read finer values. I noticed that AIN pin has a detection step of approximately 0.0003V, is there a way to make it read even finer values?

Thanks,

Bruce

Tue, 02/28/2017 - 10:31

LabJack Support

Appendix B has lots of

Appendix B has lots of details about the typical resolutions you can achieve:

https://labjack.com/support/datasheets/u6/appendix-b

No, you can't change the reference, but you can increase the gain of the internal instrumentation amplifier, which reduces the signal range, which improves resolution.

Tue, 02/28/2017 - 12:03

BruceYuan

Thanks for the support.

If I understand correctly, I can improve the effective resolution by increasing the resolution index. How exactly can I do that?

Tue, 02/28/2017 - 15:08

LabJack Support

What are you using for

What are you using for software?

In the Test panel in LJControlPanel, or in LJLogUD, or in LJStreamUD, you control ResolutionIndex right on those screens.

For software of your own, you control it by writing to LJ_chAIN_RESOLUTION which you should see in most examples involving analog inputs.

https://labjack.com/support/datasheets/u6/high-level-driver/example-pseu...