ED Decision 2003/10/RM
Data acquisition systems which utilize an analog-to-digital (A/D) converter to process the electronic signals from load cells must be configured to accurately record loads during a test. The following parameters are recommended for recording with an A/D converter system:
1. Sample Rate 20 Hz minimum
2. Resolution 12 bits minimum
3. Anti-aliasing pre-filter 5 Hz low pass (0 to -4 dB at 5 HZ),
-20 dB/decade rolloff at frequencies above 10 Hz
The signal amplifier should provide sufficient gain so that the expected full-scale, or highest anticipated value to be recorded, is at least 70 percent of the maximum input range of the analog-to-digital converter (A/D). No post acquisition digital filter, smoothing, or averaging algorithm may be applied to the data.
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