Table of Contents
Advertisement
~
r-.....-
~ ~
t--....-
~"\:-...
\
Dispi.:Cement
l
"'
l'\
"' ,
'\
"""'
..
'\
"'
~
'\
"'
~
1:
1Hz-
1000
mm
-
2:
3H
z
-
100
mm
3
:
10
Hz
-
10
mm
_
~
"" '
~
"" '
~
4
:
30H
z- 1
mm
1\.
~:
~
~~
=
g:6 t
:m -
~
~
~
"\
~
'
'\
\.
'\
~
'
'
-
10
-
20
r \
.1
r\.2
r \
.3
"
4
1'\.s
"6
"
'
"
f\.
\.
"
\..
-30
-40
\
"
\
"
\
"
\.
\
r\
\
1\.
\
-50
\.
\.
\.
\.
\.
!\.
1 Hz
10Hz
100Hz
1
kHz
10
kHz
Frequency
171C'2ttf#
Fig.5.9. Frequency response of displacement networks
~
-20°
~
E
-400
~
-
60°
!
-80°
~
f.
-
100°
-180°
-
--
. .............
0.1 Hz
-
--
-..._
--
Di~lacement
J
.
r---
--.........
---
r--..- --.........
---
1:
1 Hz - 1000
mm
-
r--....
2
:
3 Hz - 100
mm
l'oo.
....
3:
jg
~:
: : :
~Om%m
_
"""
....................
""
.........
~
4:
1'--.
t'....
5:
100Hz-
0.1
mm
"
~
"
'
"
"'~
6I
300 Hz
-
O.Ql mm-
1\..
1
"
2
,,3
"4
'1\..s
"·J
'
'-..
""'
~
"""
~
~
"
...............
~
~
"-..
..........__
__
..............
---
=--- --
[--.....
----
_--.......
t--
-
-
-
-
1Hz
10Hz
100
Hz
1kHz
Frequency
Fig.5.10.
Phase response of displacement networks
given in Fig.5.9), which is equal to or just less than the lowest measurement
frequency of interest. This ensures that signals with frequency components
equal to, or greater than the lowest frequency of interest are correctly
integrated.
5.2.5. Output Characteristics
For the "Acceleration", "Velocity" and "Displacement" modes of the
4292, the minimum resistive load which may be connected to the output of
the preamplifier is 1 Mil. The output characteristics (peak output voltage
versus frequency) of the preamplifier in its "Acceleration" mode, for mini-
mum and maximum preamplifier sensitivities are given in F igs.5. 11 and
5.12, respectively. The characteristics
·
s how the upper limits of the preampli-
fier's dynamic range when various extension ·cables (cable capacitance
5 nF/100 m) are connected to its output.
27
Advertisement
Table of Contents
