Polytec PSV-500, Hardware Manual

Page: 62 / 109

7-6
7 Technical Specifications
Table 7.4: Metrological properties of the DV-04 decoder (4 of 4)
Full scale value (peak) 1 000 2 000 5 000 10 000 mm / s
Scaling of analog output
250 500 1 250 2 500
Frequency range
f
min
0 0 0 0 Hz
f
max
2 000 2 000 2 000 2 000 kHz
Max. acceleration 1 280 000 2 560 000 6 400 000 12 800 000 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 ± 0.1 dB
100 kHz … 1 MHz + 0.2 / – 0.5 + 0.2 / – 0.5 + 0.2 / – 0.5 + 0.2 / – 0.5 dB
1 MHz … 2 MHz + 0.2 / - 1 + 0.2 / - 1 + 0.2 / - 1 + 0.2 / - 1 dB
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 1 m on 1 3M Scotchlite™ Tape (retro-reflective film).
frequency-dependent
3
3
The attainable resolution is frequency-dependent and 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.
0.2 … 0.8 0.4 …1.0 1.0 … 1.5 2.0 … 2.5
typically
4
4
The typical value refers to the center of the operating frequency range.
0.4 0.6 1.0 2.0
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 ± 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 0.5 %
Harmonic distortions – 52 – 52 – 52 – 52 dBc
Spurious signals (non-
harmonic)
7
7
The maximum amplitude of the distortion refers to the full scale. An exception of this is just a peak, generated by the optical
sensor in the frequency range 20…25 kHz and its multiples, whose amplitudes depend on the stand-off distance.
– 86 – 90 –90 – 90 dBFS