Search found 7 matches

by ACW
Fri Dec 13, 2013 2:55 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

Hi Thanks looks like a soulution for now, possibly plot the average reading over 10 - 20 samples to smooth out the curve but problen is that i am looking for small transiant changes in the force. i will keep experimenting see if i can get any better results possibly have to resort to a more expensiv...
by ACW
Fri Dec 13, 2013 2:03 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

+/- 1.25v but no change when you use the other ranges

Thanks
by ACW
Fri Dec 13, 2013 12:11 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

the range is o to 30 mV on the recording. the noise seen is roughly 20mV when you have the scope running, same with the pico log. the measurement we are looking at is from zero to 0.5v. that relates to the source, a force gauge that reads zero to 5kg. the noise is almost as large as the changes we a...
by ACW
Fri Dec 13, 2013 9:47 am
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

Hi data recording uploaded as file atachment
Test run with noise

voltage input is on the top line and had the input leads shorted together, when using it with the measuring source we get the same level of noise that interferes with the signal we are trying to look at.

Thanks
by ACW
Thu Dec 12, 2013 4:43 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

No
Tried it on batteries, but no difference,

Any more advice

Thanks
by ACW
Thu Dec 12, 2013 3:47 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

Re: DRdaq noise on signal

Hi
Got a second DrDaq and it shows the same symptoms
Is my laptop that is generating the noise? or the usb power supply from the laptop

Thanks
by ACW
Wed Dec 11, 2013 2:43 pm
Forum: Getting Started
Topic: DRdaq noise on signal
Replies: 11
Views: 8497

DRdaq noise on signal

Hi using a DrDaq to log voltage data but when setting up the system we get noise on the signal that cannot be removed. if we try shorting the input connectors i would expect to see zero volts but the noise moves from 0 to 30mv the signal we are measuring is in the range zero to 0.5 v any solutions o...