The Pressure-dP/dt Amplifier Module is a precision bridge transducer
amplifier and
regulated 5 volt DC bridge excitation source plus a differentiator and
precision
derivative calibrator. The Model 300-205 will operate most implanted pressure
transducers, pressure catheters and extracorporeal gauges.
The Model 300-205 provides front panel adjustment for bridge balance. Calibration
and
zero are generated with precision internal bridges and are selected with a front
panel
RUN/Calibrate switch. The 'zero' output represents a balanced bridge and the
calibrate
position represents 100 mm Hg when used with a 5uV/V/mm Hg sensitivity
gauge. The
calibration output can be used with other gauge sensitivities and the
full-scale calibration value will be
inversely proportional to 5uV/V/mm Hg divided by
the actual gauge factor.
The300-205 provides both instantaneous and mean pressure output signals. The
output
signals are controlled by a set of front panel gain and offset controls which
make it
possible to configure the module to drive chart recorders, tape recorders or
A/D
converters.
In addition to the pressure outputs, the Pressure-dP/dt Module contains a precision
low
noise differentiator with two-pole high frequency cut-off. The differentiator has
independent front panel gain and offset controls for use with various recording devices.
The Model 300-205 has a differentiating calibrator which is unique. Internal clock
circuits
generate a multiple slope, constant amplitude waveform which is used to calibrate
the dP/dt
output. A front panel selector switch sets calibration steps in units of the
pressure gauge calibration, either internal bridge
or manometer calibration. The
calibration units are in mm Hg/sec. Independent front panel gain and offset controls set
the dP/dt calibrator output level in order to match to the pressure calibration signal.
Copyright 1995 Triton Technology, Inc.
Updated March 28, 2006
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