Polytec PSV-500-3D, Руководство по эксплуатации

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7-4
7 Technical Specifications
Table 7.2: Metrological properties of the DV-04 decoder for PSV-500-3D Standard (2 of 5)
Full scale value (peak) 10 20 50 mm/s
Scaling of analog output
2.5 5 12.5
Frequency range
f
min
0 0 0 Hz
f
max
100 200 500 kHz
Max. acceleration 640 2 560 16 000 g
Frequency response
1
1 The frequency response defines the frequency-dependent amplitude error, referred to the reference frequency of 1 kHz.
0.0 Hz…100 kHz ±0.1 ±0.1 ±0.1 dB
100 kHz…500 kHz –/– +0.2/–0.5 +0.2/–0.5 dB
Resolution analog output 0.38 0.76 1.9 µm/s
Resolution
2
2
The noise-limited resolution is defined as the signal amplitude (rms) at which the signal-to-noise ratio is 0 dB with 1 Hz
spectral resolution, measured in a distance of 0.5 m on 3M Scotchlite™ Tape (retro-reflective film).
Frequency-dependent
3
3
The attainable resolution is frequency-dependent and is specified for frequencies above 10 Hz. In the frequency range from
10 Hz to 5 kHz the specified decoder noise is superimposed by the scanner noise. The resolution is then between 0.1 and
1.0 μ m/s with 1 Hz spectral resolution.
0.02 0.02…0.03 0.02…0.08
typically
4
4
The typical value refers to the center of the operating frequency range.
0.02 0.03 0.05
Calibration error analog output
5
5
Conditions: sinusoidal vibration, f = 1 kHz, amplitude 70% of full scale range, load resistance ≥ 1 M Ω
T
a
= +5 °C…+40 °C
(T
a
= 41 °F…104 °F)
±1.0 ±1.0 ±1.0 %
Linearity error analog output
6
6
The linearity error is defined as the amplitude dependent, relative deviation of the scaling factor referred to the scaling factor
under calibration conditions (refer to footnote
5
).
0.5 0.5 0.5 %
Harmonic distortions
7
7
Harmonic distortions are specified up to 70% of full scale for the wanted signal.
< –48 < -52 < -52 dBc
Spurious signals (non-harmonic)
8
8
The maximum amplitude of the distortions refers to the full scale.An exception of this is just a peak in the frequency range
20…25 kHz and its multiples. This peak is generated by the laser in the optical sensor, the amplitudes depend on the stand-off
distance. The CoherenceOptimizer can cause interferences at a frequency of 610 Hz and harmonics.
< -70 < -75 < -80 dBFS