Shunts
An Instrument Shunt is a resistor connected in parallel with a measuring device to move the current range beyond a particular value for which the instrument is capable of measuring directly.
See Also: Current Shunts
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Product
DC Current Shunts
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DC current shunts / standards are true 4-terminal devices that precisely measure DC currents from 10 A to 10,000 A. They use special alloys in the resistive elements which are supported on an insulating base for mechanical stability. The 9230A includes special features to reduce the effects of power dissipation and associated self heating errors. These shunts are designed to operate in air at full rated current. These are the best performing, and most widely used, DC metrology shunts in the world.
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Product
AC Current Shunts
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AC Current Shunts feature low uncertainty (high accuracy), low temperature coefficients and excellent stability. These shunts are purely resistive with extremely small values of reactance. The 7340 shunts may be used over a wide frequency range from DC to 100 kHz and are optimized for use with thermal converters.
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Product
Phase Meter Current Shunts
610 and 650
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Clarke-Hess Communications Research
The Model 610 and 650 Current Shunts are specifically designed to operate with the Model 6000A Precision Phase Meter. These shunts are frequency tuned to have negligible phase shift (less than 5m) at 50/60Hz making them ideal for line frequency applications. They can also be idealized for other frequencies as specified by the user. Consult factory for details.
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Product
Working Standard Shunts
CSW
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CSW shunts are rated to 100 % continuous current with no loss of accuracy. They are largely immune from connection errors common to many shunts. All CSW shunts include ISO17025 accredited calibration through full current range.
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Product
Signal Conditioners
General Purpose
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Encore offers a complete line of General Purpose Signal Conditioning instrumentation to meet even the most demanding requirements. Packaged as interchangeable two-channel plug-in modules, Encore’s broad product line includes frequency to voltage converters, strain gage amplifiers, accelerometer conditioners, digital voltmeters and DC power supplies. All of our systems feature a common CAL input on the rear of the rack which allows for calibration of the entire rack. Calibration function varies based on the modules installed. For example, the Model 633 applies a shunt calibration resistor across the bridge, while the Model 149 applies a reference charge source to the input. Contact Encore today and let our team of design engineers help you determine which of our products is best for your application.
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Current Sensing
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voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.
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Product
Precision High Current Resistors/Shunts
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Measurements International Ltd.
The precision high current shunts are a series of High Current Resistors ranging from 1 A to 3000 A with optional air moving fans and resistance values from ohms to micro-ohm.
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Product
FD-11637, 8-Channel Strain/Bridge Input Device for FieldDAQ
785641-01
Strain/Bridge Input Module
8-Channel Strain/Bridge Input Device for FieldDAQ - The FD-11637 can measure eight channels and has built-in bridge completion and voltage excitation to support for quarter-, half-, and full-bridge sensors. It also features anti-alias filtering, offset nulling, and shunt calibration to reduce the effect of noise and improve measurement accuracy. The FD-11637 has an ingress protection rating up to IP67 (dust- and water-resistant), can operate in -40 °C to 85 °C environments, and can sustain 100 g shock and 10 grm vibration. The FD-11637 incorporates Time Sensitive Networking (TSN) and features an integrated network switch and built-in power circuitry for simple daisy chaining. You program the FD-11637 with NI-DAQmx, which automatically synchronizes multiple FieldDAQ™ devices. The FD-11637 is ideal for test cell and outdoor environments.
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Product
AC Current Shunts
CSA Series
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Ohm-Labs’ CSA series of ac current shunts are designed as laboratory standards for ac current measurement up to high frequencies.
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Product
Single Phase 2 Circuit Energy Meter Test Bench Type KP-S1000-B
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Bofa Instrument & Equipment Co., Ltd
Single phase 2-circuit energy meter test bench type KP-S1000-B, is a new generation, high precision energy meter calibration equipment. It is especially designed for testing 2-circuit energy meter (shunt circuit and CT circuit), open or closed test link (I-P link) both. It is an ideal testing equipment for mass production of 2-circuit energy meter in meter factory. All the testing procedures can be automatically operated by PC or by Keyboard manually.
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Product
AC Power Analyzers
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Measure voltage, current and power on 4 channels: DC, 1-phase AC or 3-phase ACMake more accurate power measurements: 0.05% at 50/60 HzMeasure current directly: internal shunts to 50 Arms, or with external probes or transducersAddress multiple test scenarios with isolated inputs
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Product
Shunt Voltage References
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Analog Devices offers a broad line of shunt precision voltage references that combine excellent accuracy and temperature stability with low noise and small packages. These devices operate in a manner that is functionally equivalent to a Zener diode. The bias current must be set higher than the sum of the maximum quiescent current of the voltage reference and the maximum expected load current. Since shunt voltage references are typically biased with a resistor, the voltage reference can operate on a wide range of input voltages.
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Product
PXI Based Multifunction Measurement and ICT Instrument
PXI-501
Multifunction Switch/Measure Unit
The PXI-501 is a multifunction measurement instrument for functional and in-circuit measurements.It combines two parametric measurement units with a digital voltmeter, a high voltage current source and a discharge unit. This powerful combination makes it the ideal instrument for classical analog in-circuit test and manufacturing defect analysis with additional functional test capabilities.With it’s fast sampling rate of up to 4MSps it speeds up measurements and is capable of measuring and generating AC signals up to 100kHz.To enhance the PXI-501 capabilities it can be combined with an ABex TM-501 or an ABex TM-404. The ABex TM-501 enhances the in and output range of the PXI-501. Furthermore, it provides a shunt current measurement upgrade. In combination with the ABex TM-404 it’s a complete in-circuit test solution with 86 channels in one ABex slot. For sure it can be upgraded to 2838 test points in one rack by simply adding additional matrix modules.With the above-mentioned terminal modules, the PXI-501 is able to act as a ABex system controller, so that no additional controller is required in the cassis.
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Interface Technology ProLine
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Knick Elektronische Messgeräte GmbH & Co. KG.
Isolation Amplifier for DC voltage and current measurement with galvanic isolation, active and passive standard signal isolation amplifier, supply isolation amplifier for supplying 2-wire sensors, transmitter for temperature and AC signals, isolating amplifiers for high voltages and shunt applications. T
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Product
Current Probes
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Teledyne LeCroy current probes do not require the breaking of a circuit or the insertion of a shunt to make accurate and reliable current measurements. Based on a combination of Hall effect and transformer technology, Teledyne LeCroy current probes are ideal for making accurate AC, DC, and impulse current measurements.
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Capacitance Bridge
1621
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The GenRad1621 Capacitance Measurement system is a completely self-contained system capable of capacitance measurements in increments as small as 0.1 aF (10-4 pF) and conductance measurements in increments as small as 100 aU (10-7 U; equivalent to a shunt resistance of 1010 M). Measurements are three terminal, with 2- or 3-terminal connection, and provision is also made for the connection of an external standard for comparison measurements.
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Midi Logger
GL240
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Its compact size contains an isolated input system which ensures that signals are not corrupted by inputs to other channels, thus eliminating wiring concerns. The GL240s multi-type inputs are suitable for voltage, temperature, humidity, pulse, and logic signals, enabling combined measurements of different phenomena like temperature/humidity and voltage. power ground allowing off-ground measurements using shunts, as well as powered or grounded thermocouples.
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Product
PXIe-4330, 25 kS/s, 24-Bit, 8-Channel PXI Strain/Bridge Input Module
781346-01
Analog Input Module
25 kS/s, 24-Bit, 8-Channel PXI Strain/Bridge Input Module—The PXIe‑4330 is a simultaneous input module that provides integrated data acquisition and signal conditioning for bridge-based sensors. The PXIe‑4330 includes increased accuracy, high data throughput, and synchronization features, making it ideal for high-density measurement systems. To remove noise, the PXIe‑4330 offers antialiasing and digital filters per channel. Each channel also features an independent, programmable excitation voltage. Additionally, the PXIe‑4330 provides remote sensing, internal bridge completion, and shunt calibration options per channel.
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Product
Load Cell Amplifier Signal Conditioner with Removeable Terminals
MODEL LCA-RTC
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The LCA-RTC Module provide low-cost, dedicated signal conditioning for a single bridge type load cell or torque sensor. Model LCA-RTC comes with removable screw-clamp terminal connectors, which accept wires without soldering.On- board jumper selections include sensitivities from 0.5 mV/V to 10 mV/V, bandwidths from 100 Hz to 30 kHz, and amplified outputs of 0 to ±5V, 0 to ±10V, 0-16 mA, 0-20 mA or 4-20 mA. Zero and span adjustments are via precision 25-turn low-tempco metal film potentiometers.The units can be operated next to the sensor with 4-wire hookup or at distances up to 1 km (3300 feet) with 6-wire hookup. An onboard 87.325 kΩ resistor allows easy shunt calibration at the push of a button. Provision is also made for a user-furnished calibration resistor. Power requirements are 11.8 to 26V DC with load currents from 10 to 60 mA, the latter applying when the unit provides 10V DC excitation to a 350 ohm load cell and delivers a 20 mA analog output.
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Product
Shunt Regulators
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These are the standard reference voltage source widely used by the feedback circuits of switching power supplies. Compared to the Zener diode, which is a discrete product, a shunt regulator has much better voltage precision because voltage control is carried out as an IC.
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Product
High Frequency Clock Divider Board
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Alliance Support Partners, Inc.
Clock Divider is designed to divide high frequency signals, up to 2.5GHz, from 4 to 256 times. It will accept single ended (Unbalanced) or differential (Balanced) signals with amplitudes as little as 100mV rms. The clock division is controlled by 4 shunt jumpers. The circuit can be disabled and the divide by counter reset with 2 control signals. The on board regulator will accept voltages from 4.85 to 15.0V. The output is capable of driving 700mV Peak to Peak into 50 Ohms.
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Turbine Flowmeters
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Titan’s small turbine flowmeter range use a radial flow principle based on the Pelton wheel technique. This well proven method is the ideal way of measuring low rates of flow of low viscosity liquids. For these mini flowmeters, a jet of fluid is directed at a turbine that is mounted on robust low friction sapphire bearings. The geometry of the turbine and the fluid chamber ensures that the rotational speed of the rotor is proportional to the flow rate through the device. The use of this radial arrangement allows more energy to be imparted into the turbine, so the bearing drag is far less important. Furthermore, because more energy is available the bearings themselves can be a lot stronger so increasing the life of the flowmeter. For larger flows, some of the liquid can bypass the turbine chamber, which then behaves as a “shunt” to the metered fluid. Accuracy is still maintained and the output remains linear.
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Product
Stand Alone/ Bench Top Load Cell Amplifier/ Conditioner Module
MODEL TMO-2
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The TMO-2 Transducer Modules is a complete differential amplifier/signal conditioners with self contained power. The units provide excitation, balance and span adjustment via precision 10 turn pots, and shunt calibration necessary to couple a user supplied bridge type transducer to an indicating instrument. Full scale output is specified at plus or minus 10 VDC. The TMO-2 provides a floating shunt calibration circuit which applies calibration at the transducer, thereby eliminating errors due to line losses. The excitation supply incorporates a Wagner Ground to greatly improve Common Mode Rejection. The factory set bandwidth of the module is narrow to improve stability for applications such as weighing scales. The removal of a single capacitor will increase the frequency response DC to 60K Hz for dynamic data applications.
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Product
Digital Arrester Clamp Tester
ALCL-40L
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MULTI MEASURING INSTRUMENTS Co., Ltd.
Lightning arresters are designed to protect a power distribution system by shunting to ground the high voltage surges caused by lightning. ALCL-40L measures to warn that an arrester is damaged or deteriorated and should not be energized.
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Dual Wide Range Power Monitor
LTC2992
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The LTC®2992 is a rail-to-rail system monitor that measures current, voltage, and power of two supplies. It features an operating range of 2.7V to 100V and includes a shunt regulator for supplies above 100V. The voltage measurement range of 0V to 100V is independent of the input supply. Two ADCs simultaneously measure each supply’s current. A third ADC monitors the input voltages and four auxiliary external voltages. Each supply’s current and power is added for total system consumption. Minimum and maximum values are stored and an overrange alert with programmable thresholds minimizes the need for software polling. Data is reported via a standard I2C interface. Shutdown mode reduces current consumption to 25μA typically.
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9 Pin Breakout Interface
VSI-Breakout-9
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The VSI-Breakout-9 is a very useful tool in debugging signals or software in a system. It allows unlimited access to signals within the cabling that might otherwise be difficult to access. The board gives test points at each side of the connector and jumper with a easy to use tabbed shunt to allow for easy disconnection of any particular signal between the connectors. The jumpers also give an opportunity to inject a signal regardless of what signal was originally being driven.
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Product
Selectable Shunt Current Sensor ±40 V, 20 MHz
CX1104A
Power Sensor
The CX1104A selectable shunt current sensor is a dedicated accessory for the CX3300 series and enables dynamic current measurements from 1 μA to 15 A up to 20 MHz bandwidth with an available calibrated resistive sensor head attached
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Product
AC Power Sources
CSW Series
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AMETEK Programmable Power, Inc.
The CSW Series represents a new generation of AC/DC power sources that address the increasing demands on test equipment to perform additional functions at a lower cost. By combining a flexible AC/DC power source with a high performance power analyzer, the Compact CSW Series is capable of handling complex applications that have traditionally required multiple systems. The sleek integrated approach of the CSW avoids cable clutter that is commonly found in test systems. All connections are made internally and the need for digital multimeters, power harmonics analyzers, and current shunts or clamps is eliminated.
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Product
Standard Resistor Oil Bath
9400
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Measurements International Ltd.
Measurements International’s series of fluid baths are used for the maintenance of standard resistors and shunts. The 9400 has been designed after compiling years of customer feedback on existing resistor oil baths.
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Product
Torque Measuring and Monitoring System
WISER 4000
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TECAT Performance Systems, LLC
The WISER 4000 system is the latest release of TECAT’s low-cost, ultra-low power and extremely accurate torque sensor. The wireless system has the optional ability to measure 3-axis acceleration, barometric pressure and ambient temperature, all within the same incredibly small footprint. The 4000 includes on-board data logging without PC or DAQ connectivity, and remote flash capability, which enables firmware upgrades without removing the system from the unit under test. Featuring shunt calibration, TECAT’s latest WISER system is designed to simplify instrumentation verification for users, while allowing them to check calibration of the system in the field. In addition, the WISER 4000 has been enhanced with two additional outputs, a higher-speed recording, and is available with custom-built remote enclosures to protect the system’s remote unit and battery from damage due to debris.
