Polytec PSV-I-500 - Page 75

7-12
7 Technical Specifications
Table 7.10: Metrological properties of the DV-04 decoder for PSV-500-3D Xtra (5 of 5)
Full scale value (peak) 25 000 30 000 mm/s
Scaling of analog output
6 124 7 349
Frequency range
f
min
00Hz
f
max
2 000 100 kHz
Max. acceleration 32000000 1920000 g
Frequency response
1
1
The frequency response defines the frequency-dependent amplitude error, referred to the reference frequency of 1 kHz.
0.0Hz…100kHz ±0.1 ±0.1 dB
100 kHz…1 MHz +0.2/–0.5 –/– dB
Resolution analog output 954 1 144 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 μm/s with 1 Hz spectral resolution.
5.0…8.0 6.0…8.0
typically
4
4
The typical value refers to the center of the operating frequency range.
6.0 7.0
Calibration error analog output
5
5
Conditions: sinusoidal vibration, f = 1 kHz, amplitude 70% of full scale range, load resistance ≥ 1MΩ
T
a
= +5 °C…+40 °C
(T
a
= 41 °F…104 °F)
±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 %
Harmonic distortions
7
7
Harmonic distortions are specified up to 70% of full scale for the wanted signal.
up to 2.5 MHz < –52 < –52 dBc
>2.5MHz <–26 –/– dBc
Spurious signals (non-harmonic)
8
8
The maximum amplitude of the distortions refers to the full scale at a stand-off distance of 0.5 m.
< –85 < –85 dBFS