Hi there!
I am owner
of NI PCI-6221 device. I have a problem with noise during voltage acquiring.
I’m using
SCB-68 terminal board and shielded connection cable.
When I try
to acquire voltage from any analog input in differential or RSE configuration I’m
acquiring noise with amplitude of approximately 50 microvolts. I’m acquiring
this noise even when inputs are grounded (shorted) on AI GND terminals on
terminal board.
In
attachment you can see example of this noise. It’s a screenshot of LabView
project’s front panel. Voltage input settings:
Signal
input range: Max: 200m V; Min: -200m V
Terminal
configuration: RSE
Clock
settings: Samples to read: 100; Rate(Hz): 1k
AI0 channel
was grounded on AI GND terminal.
The same
result I have in Measurements and Automation Explorer’s Test Pannels.
What can be
the reason of this noise?
Thanks!
DarkOne
