BRUEL & KJAER 4809 - Introduction to Vibration Exciter Type 4809

1. INTRODUCTION
The Type 4809 Vibration Exciter is a permanent magnet type exciter
with a force rating of 10 lbf (44.5 N). It has a round table with a centrally
located
mounting hole for connection to the test object. It can be operated
in any position.
The Type
4809 can be used for accelerometer calibration, for mechanical
impedance measurements, for educational demonstrations or for vibration
testing
of small objects or structures.
It has a maximum acceleration capacity of 75 g and a maximum displace-
ment of 0.315 in. (8 mm) peak to peak. Low distortion operation is possible
in the frequency range 20 Hz to 20 kHz.
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