Use With Other Instruments; Frequency Sweep Vibration Testing - BRUEL & KJAER 2707 Instructions And Applications

5. USE WITH OTHER INSTRUMENTS
5.1. FREQUENCY SWEEP VIBRATION TESTING
Sine wave testing is a powerful laboratory tool during equipment
development and can be used not only to detect resonance, but also for
extended testing at the known resonances (dwell testing) and for testing by
sweeping through a band of frequencies.
Sweep testing requires the exciter to be fed with a sinusoidal drive signal,
at a pre-determined rate of change of frequency (sweep rate). Resonances in
the test object and exciter system mean that the power supplied to the
exciter is frequency dependent and must be automatically decreased or
increased. This is usually done by the compressor amplifier within the signal
source, the time constant (regulation speed) of which must be selected
according to the expected 0-values of the system resonances.
Automatic Vibration
Exciter Control
1025
Remote Control
Power Amplifier
2707
Level Recorder
2305
Precision Sound
Level Meter
2203
Exciter Head/Body
4801/4812
Preamplifier
2622
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• 0 . - · -
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ZTI02S
Fig.5. 1. Measuring set-up for investigation of vibration sensitivity of the
Precision Sound Level Meter Type 2203
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