Type 8921B reference shaker from Kistler Instruments is a compact, portable vibration exciter
designed to calibrate the sensitivity of accelerometers in both laboratory and
field environments. The rechargeable battery powered unit with automatic
power-off is an easy to use method of verifying the sensitivity of
accelerometers weighing up to 600 grams.
The new shaker provides an accurate,
controlled vibration level to verify the sensitivity of accelerometers or a
complete measuring system traceable to a national standard. The internal
control and excitation system provides a constant, precise frequency whilst a
closed loop control maintains constant amplitude independent of the mass of the
test article. Should the test article exceed the capacity of the shaker, the
unit provides an audible and visual warning to the operator and has sufficient
power to test sensors from the smallest laboratory accelerometer to large
industrial sensors.
In addition to confirming the sensitivity of
accelerometers, the reference shaker provides a convenient and accurate means
of testing the integrity of a vibration measurement system from end-to-end. The
rugged design of the shaker ensures years of reliable operation in factory
environments and in the laboratory. The self-contained, rechargeable battery
can power the shaker for up to five hours and an automatic shut-off after 10
minutes of continuous operation protects the battery from accidental discharge.
Front panel indicators provide information about the sensor sensitivity and the
condition of the internal battery.
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