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7626375 |
System and method for configuring a display for a digital multimeter
A digital multimeter with a rotary switch having a plurality of positions, each of the positions corresponding to a primary measurement function to be performed. An LCD displays secondary functions...
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7545136 |
Device for measuring current
A device for measuring current comprises a magnetic field sensor for measuring the magnetic field produced by a current I flowing through a current conductor and a yoke of a magnetic material with...
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7538539 |
Current meter with reduced range switching and load transients
An ammeter for ATE instrumentation includes an amplifier, a first current measuring circuit coupled to the amplifier's power supply leads, and a second current measuring circuit coupled to the...
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7477998 |
System and method for providing universal additional functionality for power meters
A system and method for providing an additional option function to existing functionality of a meter device configured for measuring parameters of energy is provided. The meter device is coupled...
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7468602 |
Digital multi-meter
A digital multi-meter (DMM) is described which can be inserted into a peripheral device card expansion slot of a personal digital assistant (PDA) to provide the PDA with DMM functionality. The DMM...
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7459900 |
Modular current sensor for modularized servo control system
A modular current sensing system for a servo control system that includes a magnetic core with an open center portion and a connection plate that includes at least three wire connectors, wherein...
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7439725 |
Multimeter
A multimeter has a housing with at least three input connections, configured as female connectors, for connecting to two measurement lines. When a measurement variable is changed, it is possible to...
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7339367 |
Interface for detection and control of multiple test probes
An interface module. The interface module includes a probe identification module configured for connection to an identification bus, a probe detect module configured for connection to a...
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7336065 |
Energy device with an extended dynamic range on current readings
Systems and methods are disclosed for accurately measuring delivered or supplied electrical energy over an extended range of values. In one embodiment, a meter for monitoring the energy at a remote...
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7332903 |
Device and method for measuring a current flowing in an electrical conductor
A device is provided for measuring a current flowing in an electrical conductor with a magnetic circuit for coupling to the electrical conductor. The magnetic circuit has an air gap, and a magnetic...
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7312602 |
Electrical meter with retractable leads
An electrical meter 10 comprises a housing 12 with a spool 14 rotatably mounted therein. A first lead cable 16 and a second lead cable 18 are wound upon the spool 14 . A wound spring 90...
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7276893 |
Automatic ranging current shunt
A range-changing circuit includes an array of graduated impedances in serial relationship, and a voltage sensing and limiting switch across one of said impedances. The switch limits the voltage...
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7180309 |
Electronic system for multielectrode sensors and electrochemical devices
A basic electronic unit, an integrated electronic system, and the associated software program for coupled multielectrode electrochemical devices or sensors. The basic electronic unit uses different...
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7175490 |
Boat indicator
A boat indicator enables a user to easily read engine speeds for boats which can switch between a low-speed trolling mode and a normal running mode at speeds higher than the trolling mode speed....
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7164262 |
In-head converter with display
A typical probe comprises a sensor, and a connection head that includes a conversion circuit for driving the sensor. The probe communicates with a controller via a two wire DC 4-20 mA link. The...
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7148674 |
Apparatus for automatically measuring a relatively wide range of leakage currents
A leakage current measurement apparatus for measuring leakage currents is disclosed. The leakage current measurement apparatus automatically selects one of non-inductive shunt resistors of 10Ω,...
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7126325 |
Digital multi-meter with operational error prevention technology using LED and microprocessor with input sockets
The present utility model provides a digital multi-meter that can not only; generate warning signal when the test probe is misplugged but also indicate the assigned socket before the probe is...
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7109700 |
Multimeter having off-device display device and selection device
Electronic testing devices such as multimeters, and probes therefor. The probes may have off-device display devices attached thereto. The display devices may be non-detachably attached to the...
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7109728 |
Probe based information storage for probes used for opens detection in in-circuit testing
Disclosed is a novel electrical probe that stores probe-specific information. A probe implemented in accordance with the invention includes a processor, memory, and a communications interface....
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7072785 |
Rate measurement for anomalous trigger events
A method and apparatus for processing anomalous trigger event conditions to provide anomalous trigger event rate measurements. The apparatus operates to identify one or more trigger events in at...
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7071712 |
Method for the automatic identification of sensor sensitivity
A method for the automatic identification of sensor sensitivity, according to which resistance of a specific magnitude is allocated to the sensor. The resistance is used to allocate the sensor to a...
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7062168 |
Bifurcated range stages to increase speed or dynamic range of measuring instruments and associated methods
Multiple stage ranging circuitry for a measuring circuit includes a first ranging circuit that selectively amplifies an input signal by respective amounts according to the magnitude of the input...
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7038398 |
Kinetic illumination system and methods
The present invention relates to methods of creating eye-catching displays by taking advantage of color-changing illumination provided by LED systems disclosed herein. Displays can be made to...
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7034517 |
Multimeter with filtered measurement mode
A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from...
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6989663 |
Flatness correction
A calibration system for measurement device is operable to calibrate each channel response to compensate its own gain error for a desired frequency range. The channel modes may include voltage...
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6985819 |
DMM module for portable electronic device
A digital multimeter adapter for a portable electronic device includes a hardware interface connector and a computer program memory. The memory stores computer program instructions that direct the...
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6975104 |
Clamp meter with dual display
A clamp type digital multimeter has one or more digital displays mounted so as to permit at least one of the displays to be read even when attachment of the clamp jaws about a conductor forces the...
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6936978 |
Methods and apparatus for remotely controlled illumination of liquids
Methods and apparatus for remotely controlled illumination of liquids in a variety of environments. In one example, remotely controlled multi-color LED-based light sources are employed to achieve a...
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6841987 |
High speed measurement system which selects optimal measurement range on a sample by sample basis
A high speed multiple range measurement system that selects on a sample by sample basis the range having the highest resolution and accuracy for which an overload condition does not exist. A...
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6837108 |
Increasing the dynamic range of a MEMS gyroscope
A MEMS gyroscope system and method for increasing a dynamic range of the MEMS gyroscope is provided. By adjusting a scale factor of the MEMS gyroscope, the highest sensed rate will be increased,...
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6825717 |
Feedback network and amplifier and/or converter circuit with a feedback network
A feedback network for connecting an output of an operational amplifier with a feedback input of the operational amplifier, wherein the feedback network comprises a feedback circuit. The feedback...
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6812685 |
Auto-selecting, auto-ranging contact/noncontact voltage and continuity tester
An electrical testing device has non-contact AC voltage sensing, single probe contact AC voltage testing and voltage metering functions. Non-contact voltage sensing is used to detect the vicinity...
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6794881 |
Arrangement for measuring the root mean square of a power frequency voltage across a large dynamic range, especially for measuring electrical output
The root mean square of a power frequency voltage is measured across a large dynamic range, for example in order to measure electrical output, by converting the voltage to be measured into two or...
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6794859 |
Automatic multimeter
To measure a resistance value in a circuit by conventional method, one side of the resistor should be disconnected from the circuit, then an Ohmmeter is connected across the resistor. To measure a...
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6675650 |
Automotive display
A tachyometric display for automotive engines comprising a display head defining a circular display field. The field comprises a plurality of concentric circular bands having a quiescent state in...
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6646562 |
Hooking-type fully automatic electric meter
A hooking-type fully automatic electric meter with a function of fully automatic detecting and choosing a measuring mode among the electric current, voltage and resistance measuring modes. A user...
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6622097 |
Method and apparatus for reading and controlling electric power consumption
An electro-optical, automatic meter reader for enabling a consumer to view and manage power consumption through a browser. A sensor attached to a bracket is mounted to the outside cover of a...
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6603301 |
Multiple range current measurement system with low power dissipation, fast setting time, and low common mode voltage error
A multi-range measuring circuit for measuring a flow of electrical current between a first node and a second node. A measurement resistor is connected to the first node to develop a voltage having...
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6577287 |
Dual variable color display device
A single variable color display device simultaneously exhibits two distinct display units in a side by side relation. Two color controls are provided for illuminating the display units in...
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6577132 |
Passive system for the detection and indication of non-ionizing electromagnetic radiations and static electricity
A passive device for the detection and indication of non-ionizing electromagnetic radiations and static electricity is provided. The device is especially designed to be applied to or integrated in...
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6563296 |
Closely-coupled multiple-winding magnetic induction-type sensor
The invention relates to sensors for detecting a time-varying current by employing a plurality of coils with separate windings, disposed on separate toroidal cores, that are placed in close...
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6548999 |
RMS power sensor with 84 dB dynamic range
A power meter includes components to measure RMS power over an 84 dB range or greater using the I-V square-law relation of a diode for measurements. The power meter includes multiple diodes along...
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6531862 |
High performance current sensor using low cost current transformer arrays
The present invention provides a current sensor for an electrical device. The sensor includes a housing, a conductor routed through the housing, an array of current transducers coupled to the...
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6483289 |
Modular sensor array, metering device and mounting and connection base
A metering module has a housing, a metering circuit in the housing for receiving and processing at least one signal corresponding to an electrical quantity, and developing an output signal. A...
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6466003 |
Microamp measurement for two-terminal digital meter
A two-terminal multimeter capable of both volt/ohm and current measurement employs an input protection circuit with a positive temperature coefficient impedance and a reference impedance, across...
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6429641 |
Power booster and current measuring unit
A power booster and current measuring circuit provides a quiet, accurate voltage to a load (such as a transistor during parametric testing) with a load current of up to 1 ampere, and can measure...
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6424327 |
Multicolor display element with enable input
A multicolor display element includes a plurality of display areas arranged in a pattern, each including light emitting diodes of respective primary colors, which are coupled to the buses in...
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6392402 |
High crest factor rms measurement method
An rms converter accommodates incoming signals of large crest factor by using an amplifier having a transfer function of non-uniform slope. The amplifier has a lower gain for larger signals. The...
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6385550 |
Apparatus and method for providing forward and backward compatibility between a host instrument and an accessory
A probe or accessory incorporating the features of the subject invention includes a communications arrangement for communicating topology-related data to a host instrument connected to the probe or...
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6380726 |
Smart auto-ranging RMS measurement method and apparatus
An apparatus and method for performing an auto-ranging function in electronics test equipment monitors both the RMS value and the peak value of the input signal to be measured. In the subject...
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