BRUEL & KJAER 4294, User Manual

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Calibration Exciter Types 4294 and 4294-002 – User Manual 10
3.2 Specifications
4294 4294-002
Dynamic Characteristics
Frequency (Hz) 159.15 ± 0.02%
Acceleration (ms
–2
(RMS)) 10 ± 3% 3.16 ± 3%
Velocity (mms
–1
(RMS)) 10 ± 3% 3.16 ± 3%
Displacement (
μ
m) 10 ± 3% 3.16 ± 3%
Transverse Amplitude < 5% of main axis amplitude
Distortion 4294:< 2% for 10 to 70 gram load
4294-002: < 2% for 10 to 200 g load
4294 and 4294-002: typical < 7% for 0 to 10 g. Use DB-2996 (10 g) with very light
accelerometers to achieve 2% distortion
Power Requirements
Built-in Battery One 9 V Alkaline Battery QB- 0016 (IEC type 6LR61)
Battery Life Approximately 200 calibrations, each lasting 100 s with automatic switching off at the
end of each calibration
Warm-up Time (Seconds) < 5
Signal Duration (Seconds) 103 ± 1 s with automatic stop
Long-term Stability Better than 1% per year for acceleration, velocity and displacement; better than
10 ppm per year for frequency
Physical Characteristics
Length From bottom to top of calibrator table: 135 mm (5.3 in) – see Fig.3.1
Diameter With case: 46 mm (1.8 in), without case: 43.5 mm (1.7 in)
Weight 500 g (17.6 oz) including battery and leather case
Transducer Mounting
Maximum Load (gram) 70 200
Mounting Torque (Nm) Max. 0.5
Mounting Thread 10–32 UNF