The Dual Pressure Amplifier Module is a precision bridge transducer
and regulated 5 volt DC bridge excitation source. The 300-204 will operate most
implanted pressure transducers (i.e. Konigsberg), pressure catheters (i.e. Millar)
and extracorporeal gauges. There are two identical, independent amplifiers
contained in the module.
The Model 300-204 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.
The Model 300-204 provides both instantaneous and mean 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,
A/D converters, etc.
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