Vibration System :
Electromagnetic exciter with internal built-in accelerometer for servo regulation of vibration amplitude
159.15 Hz ± 0.02 % (1000 rads-1)
RMS Vibration Levels :
Acceleration : 10 ms-2 (rms) ± 3 %
Velocity : 10 mm/s (rms) ± 3 %
Displacement : 10 µm (rms) ± 3 %
Transverse amplitude :
less than 5 % of main axis amplitude.
less than 2 % for 10 to 70 gram load; less than 7 % for 0 to 10 gram.
Use DB 2996 (10 g) with very light accelerometers to achieve 2 % distortion
Warm up time :
less than 5 seconds
Mounting Torque for accelerometer :
max. 0.5 Nm
Signal Duration :
103 ± 1 s with automatic stop
Long Term Stability :
better than 1 % per year for acceleration, velocity, displacement; better than 1O ppm per year for frequency.
Transducer Mounting :
Maximum Load : 70 grams.
Mounting Thread : 10-32 UNF
Battery Life :
Approximately 60 calibrations each lasting approximately 100 s with automatic switching off at the end of each calibration.
Length : 155 mm
Diameter : 52 mm
Temperature Range :
+l0 °C to +4O °C for 10 ms-2 reference within ± 3 %
-10 °C to +55 °C for 10 ms-2 reference within ± 5 %
Up to 90 %RH (non condensing) at 30 °C
1 x 9 V Alkaline battery - IEC type 6LR61
500 g including battery and leather case
Calibration Exciter Type 4294
is a small, handy, completely self-contained
vibration reference source. It is intended for rapid
calibration and checking of vibration measurement, monitoring
and recording systems.
Small, lightweight and battery-driven
Leather case with impact protection – designed for everyday use in
Drop- and environment-tested according to IEC 60068
Splash-proof according to IP54 (IEC 60529)
High precision, crystal controlled servo-operating at 159.15Hz
(1000 rad s–1)
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