Polytec OFV-511 User Manual

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With the low pass filter switched off, the vibrometer behaves as a system of constant
time delay i.e. the phase shift is proportional to the frequency. The phase shift
depends, however, on the measurement range set. .
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Velocity
decoder
Measurement range
Time delay t
d
(typ.)
Specific phase roll-off p
d
(typ.)
µ s °/kHz
OVD-01 1 23.9 − 8.6
57.1 − 2.56
25 and 125 6.0 − 2.15
1,000 5.2 − 1.9
OVD-02 5 6.4 − 2.3
25 and 125 1.9 − 0.7
1,000 0.9 − 0.33
Velocity
decoder
Measurement range THD @ f = 1kHz
10%...90% of full scale range
OVD-01 1 < 0.25% (< − 52dB)
5; 25; 125 and 1,000 < 0.10% (< − 60dB)
OVD-02 5 and 25 < 0.20% (< − 54dB)
125 and 1,000 < 0.30% (< − 50dB)
mm
s
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⁄
mm
s
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Polytec OFV-511 Specifications

General

Brand	Polytec
Model	OFV-511
Category	Measuring Instruments
Language	English