Sound and Vibration Instrument Hire and Calibration
Bruel & Kjaer 4294 Vibration Calibrator Specifications
| B&K 4294 : Vibration Calibrator - hand held | £ 5 a day * |
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Vibration System :
Electromagnetic Exciter with internal built-in accelerometer for servo regulation of vibration amplitude
Frequency :
159.15 Hz ± 0.02 % (1000 rad/s)
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.
Distortion :
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.
Dimensions :
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 %
Humidity :
Up to 90 %RH (non condensing) at 30 °C
Battery :
1 x 9 V Alkaline battery - IEC type 6LR61
Weight :
500 g including battery and leather case
Accessories Include :
1 x Leather Case - KE 0278
1 x 10-32 UNF Steel Stud - YQ 2962
1 x 3 mm Mounting Disc Adaptor - DB 2996
* Our standard hire charges are based on a 4-day minimum period, details other options.
