Mechanical Measurements; Automatic Recording Of Accelerometer Frequency Response - BRUEL & KJAER 1013 Instructions And Applications

phones) should be small in comparison with the time constant which deter-
mines the compressor speed.
Fig. 5.17 shows a frequency characteristic of a piezo-electric hydrophone
measured by the previously mentioned system.
Exciting Section
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1013
AO 0014
Accelerometer
under test
Cathode
Follower
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2804
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Control voltage to regul. am pl.
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- - - - - - - - - - - - - - - - - - - - - - - - - ________________________ J
Mechanical Connection
2804
Fig. 5.18. Measuring arrangement for frequency response calibration of
accelerometers .
MECHANICAL MEASUREMENTS
Automatic Recording of Accelerometer Frequency Response.
In the production of high quality electromechanical transducers it is a
important asset to deliver wit hevery unit an individually recorded amplitude
versus frequency characteristic.
The B & K accelerometers, which are duly supplied with individually re-
corded amplitude vs. frequency curves, are measured on a measuring
arrangement equivalent to the one shown in Fig. 5.18. The arrangement con-
40