The
Power Amplifier Type
2706
amplifies
the
signal from
the
Beat
Frequency
Oscillator
Type
1022 and feeds it
to
the
Exciter.
The
signal from
the
Force Transducer
is
boosted
in
the
Conditioning Amplifier
Type
2626
and fed
to
the compressor circuit
of
the
Oscillator. In this way,
the
force
level
of
the
shaker system can be held
constant
throughout
a frequency
sweep
regardless
of
table and specimen resonances, provided suitable com-
pressor speeds and sweep speeds are
selected.
The Force Transducer Type
8200
has a nominal charge sensitivity
of
17.8
pC/Ibf. (4 pC/N). While there are no
direct
reading force scales for
the
Measuring Amplifier, a proper choice
of
acceleration scales will accomplish
the
same purpose.
The
SA 0071 scale
is
for
accelerometers with a sensitivity
of
6-17 mV/g. Since
the
output
of
the
Type
2626
is
10 mV/g
once
the
sensitivity
of
the
transducer
is
dialed in,
the
SA 0071 could be used
to
read
Newtons
or
pounds instead of
g.
17
To Next Page
Loading...
