Service-Request Requirement; Why Does The Data Read From I-8014W Seem Unstable - ICP DAS USA I-8014W User Manual

Service-request requirement

When using a stable signal source such as a battery to output signal to the I-8014W
and getting an incorrect or unstable data, prepare the following three items and e-mail
to service@icpdas.com
●
The picture of physical wiring
●
The file saved from the Basic Information tag (See
●
The file saved from the AI Test tag (See
Why does the data read from I-8014W seem
unstable?
If the battery testing could measure voltage correctly, but not the real signal source, it
maybe caused by the following factors:
●
a noise-corrupted signal source
●
the instability of a signal source
●
the floating signal source which does not reference to a system ground
(earth or building ground)
Because the high speed data acquisition function of the I-8014W, it captures all the
noise coupled on signal or any change of voltage on an unstable source. In this case,
signal filtering or isolation should be considered to enhance the signal quality.
I-8014W API User Manual, v1.0.1, June 2011
Copyright © 2011 ICP DAS Co., Ltd. All Rights Reserved. E-mail: service@icpdas.com
.
It is recommended to connect the V- to AGND (system
ground) when measuring differential signals as the figure
shows as below:
page 89, step
page 91, step 4)
3)
92