Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Reexamination Certificate
1999-11-17
2001-08-07
Metjahic, Safet (Department: 2858)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
C324S142000
Reexamination Certificate
active
06271654
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a multifunctional meter with dual input channels, and more particularly to an meter which is able to not only display two sets of measured values, but also calculate the measured values in the case of two objects to be measured.
DESCRIPTION OF RELATED ART
As well-known, a multifunctional meter is an important measuring tool in the electrical field. It is commonly used to measure DC current, voltage, resistance, capacity, and polarity of a semi-conductor element. A conventional meter generally has a single input channel formed by a positive probe and a negative probe, that is, only one object can be measured and displayed during each operation. In the case that there is more than one object to be measured at the same time, the probes have to be removed from one object to the other. Furthermore, the measured values of each operation have to be manually recorded for further calculation. As a result, it is an aim of the present invention to set the above-mentioned problems aside and to provide an improved meter which is able to measure more than one object during one operation and provide display, storage and calculation functions to the measured values.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, a multifunctional meter with dual input channels comprises a display disposed on a panel thereof, and a function key arranged on the panel for a user to select and set various functions. A first multiple selecting unit and a second multiple selecting unit respectively are connected and controlled by a first knob and a second knob through a plurality of contact points within the meter. The meter further includes a large-current probe socket, a pair of positive probe sockets and a negative (ground) probe socket. The negative probe socket is commonly used with the pair of positive probe sockets. The first positive probe socket and the negative probe socket form a first input channel and the second positive probe socket and the negative probe socket form a second input channel. The first and second input channels are respectively connected with the first multiple selecting unit and the second multiple selecting unit. Additionally, a processing unit is arranged within the meter and connected with the display, the function key, and the first and second multiple selecting units for selective display, storage and/or calculation of two sets of measured values obtained by the first and second input channels.
In accordance with another aspect of the present invention, a multifunctional meter with dual input channels comprises a display disposed on a panel thereof and a function key arranged on the panel for a user to select and set various functions. A first multiple selecting unit and a second multiple selecting unit are respectively connected and controlled by a first knob and a second knob through a plurality of contact points within the meter. The meter further has a large-current probe socket, a pair of positive probe sockets and first and second negative (ground) probe sockets respectively arranged on the meter. The first positive probe socket and the first negative probe socket form a first input channel. The second positive probe socket and the second negative probe socket form a second input channel. The first and second input channels are respectively connected with the first multiple selecting unit and the second multiple selecting unit. Additionally, a processing unit is arranged within the meter, connected with the display, the function key, and the first and second multiple selecting units for selective display, storage and/or calculation of two sets of measured values obtained by the first and second input channels.
REFERENCES:
patent: 2509415 (1950-05-01), Bernreuter
patent: 2732491 (1956-01-01), Jeannot
patent: 4825392 (1989-04-01), Freeman
patent: 5243275 (1993-09-01), Nakazawa et al.
patent: 5619129 (1997-04-01), Kamiya
patent: 0416731A2 (1991-11-01), None
Metjahic Safet
Nguyen Vincent Q.
Pelton, Esq. William E.
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