Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1988-11-29
1990-11-20
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324689, G01R 2726
Patent
active
049721550
ABSTRACT:
A test apparatus for determining a given property, by weight, such as moisture content, of a material such as a grain or the like, comprises a chamber for receiving a sample of material to be tested, having an open top portion through which the material may be introduced therein for testing. An electrical circuit is operatively coupled with the chamber for producing an electrical measurement signal corresponding to the property to be determined and an indicator provides an observable indication of the given property of material in accordance with the corresponding electrical measurement signals. A measurement initiating control in responsive to the accumulation of a predetermined measurement weight of material in the chamber for initiating the operation of the circuit. A further warning control is responsive to the weight of material in the chamber reaching a second, predetermined warning weight slightly less than the predetermined measurement weight for producing a warning signal. The indicator is responsive to the warning signal for producing a warning indication for alerting the operator to introduce material into the chamber more slowly to thereby reduce the inertia of material entering the chamber as the measurement weight is approached, to facilitate accuracy of the determination of the given property of material, by weight.
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Bushnell Richard
Dickey-john Corporation
Eisenzopf Reinhard J.
Regan Maura K.
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