Voltage drift in an analog data acquisition 
Author Message
 Voltage drift in an analog data acquisition

I have developed a data acquisition program that inputs an analog
signal from a micrometer, converts it to a diameter measurement, and
displays the value numerically and graphically.  It also does the same
procedure with a thermocouple for temperature observations.  This
program monitors a component for about 8-14 hours.  During
observation, I'm seeing a periodic (sinusoidal) pattern in the charted
data.  I assume that this is a voltage drift (~mV).  Is there any way
to tune this voltage drift out since it is skewing my results?

Tue, 30 Mar 2004 20:05:43 GMT  
 Voltage drift in an analog data acquisition
Hi Ethan,

it depends on the frequency of this noise signal.
From your question I undersand your signals are very slow, pratically
DC voltages; in this case if the noise has a frequency of 50-60Hz you
can filter it down by a low pass filter (either analog or digital).
If the noise has a much lower freq., then it is probably generated by
the sensor.

Hope this helps,

Wed, 31 Mar 2004 00:37:00 GMT  
 [ 2 post ] 

 Relevant Pages 

1. synchronizing analog data acquisition with analog waveform generation

2. voltage data acquisition in fuse testing

3. synchronizing digital output and analog data acquisition

4. synchronisation between analog data-acquisition and counting increments

5. Analog voltage input to frequency

6. Simultaneous Analog Acquisitions

7. About PCI-6534 and analog acquisition

8. contemporary acquisition of 2 analog signals with 2 different sampling frequency

9. synchronise digital and analog acquisition using PCI-6025E board

10. i want to build a comparator to compare voltages such that reference voltage is negative

11. Data Acquisition in Clarion

12. Data acquisition from two chassis


Powered by phpBB® Forum Software