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Frequency Response
The frequency responses of the two accelerometers
were tested on a SPEKTRA GmbH CS18 HF high-
frequency calibration shaker with a range of 5Hz
to 20kHz. The sensors were securely mounted to
ensure accurate results over the full test range.
Figure 1 illustrates the results of the testing. The
data indicates that the VC MEMS sensor has a usable
bandwidth of up to 4kHz, while the piezoelectric
sensor has a usable bandwidth greater than 15kHz.
Figure 1: Frequency response chart. (Source: TE Connectivity)
Technology Comparison Chart
For industrial condition monitoring and predictive
maintenance applications, the following vibration
specification parameters are considered critical
to ensure long-term, reliable, stable, and accurate
performance:
• Wide frequency response
• Measurement resolution and dynamic range
• Long-term stability with minimum drift
• Operating temperature range
In the following paragraphs, these specifications
are compared for a typical PE condition-monitoring
accelerometer and a wide-bandwidth VC MEMS
accelerometer. Both accelerometers had a full scale
(FS) range of ±50g.
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830M1 Triaxial
Condition Monitoring
Accelerometers
