7-4
7 Technical Specifications
Phase Frequency Response
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. .
Harmonic Distortions
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
5
7.1
−
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 = 1 kHz
10%... 90% of full scale range
OVD-01
1
< 0.25% (<
−
52 dB)
5; 25; 125 and 1,000
< 0.10% (<
−
60 dB)
OVD-02
5 and 25
< 0.20% (<
−
54 dB)
125 and 1,000
< 0.30% (<
−
50 dB)
mm
s
----------
V
⁄
mm
s
----------
V
⁄
Summary of Contents for OFV-3001
Page 28: ...3 16 3 First Steps...
Page 54: ...5 12 5 Operating the Vibrometer...
Page 94: ...D 10 D Functional Description of the Controller...
