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DAQ6210 sampling problem

I am using a DAQ6210 "super" multifunction device just it doesn't work.
I would measure a scaled sine wave signal about 50Hz.But the device shows wrong wave form from the M&A explorer, it seems like a lost signal because of low sampling frequency.
On the bases of the Niquist rule the sampling frequency must be bigger than 100Hz.
I have tried 300-500-1000-2500Hz but nothing happened, the signal was still wrong.
The number of the samples were different as well from 100 up to 1000,but nothing changed.
 
The only configuration which was working ->Number of samples:150 Sampling frequency:500 for 2hours but not anymore.
 
It seems not to get the adjusted values from the software, because 300Hz samplig frequency looked like 50Hz.
 
Could you help me please!!!!!!!!!!!!!!!!!!!!!!
 
Lorand


Message Edited by hatvakaro on 11-29-2007 03:58 AM
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Hi Lorand,

at least you need a sampling frequenz that is ca. 10 times faster than the one you would like to measure to get  judiciously curve. A 2kHz sample frequence with 200 samples should show a correct graph.
Another question, why do you run this in MAX? MAX usually is for generating Tasks or do a short check if the HW works but not for measurement.

Regards Chris
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