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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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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Impulse Current Measuring Shunts
ICMS
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The Impulse Current Measuring Shunts ICMS are new designed tubular shunt types with best response behavior to match the high performance of the TR-AS digital recorder for comparative current measurements. A 1st partial response time less than 10ns and a settling times less than 20ns show the advantage of these shunts. They show no initial overshoot peak, no oscillations and do not need compensation box to optimize the transient behavior as known from e.g. cage shunts.
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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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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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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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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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Shunts
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Highly accurate manganin resistance d.c shunts. When a current is passed through the shunt a proportional millivolt output is produced.
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Precision Shunt Chip Resistors
SMV
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*5W permanent power at 65C*High pulse power rating*Mounting: Reflow and wave-soldering
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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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Multiphase Power Analyzer
2800 Series
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The Valhalla Scientific 2800 High-Precision Power Analyzer is available in 1-, 2-, 3-, 4-, 5-, or 6-phase versions. All voltage inputs 0.3V up to 1500V peak and all current inputs 1.5mA up to 1A; 15mA up to 5A; 1A up to 40A; and shunt inputs 60mV up to 6V are potentially free and exhibit low noise, high common mode suppression, excellent DC-stability, wide frequency range (DC-2MHz) and very low self-heating on current inputs.There is no need to fiddle with DC-compensation, or changing current plugging. All is built into the input sections of the power analyzer, ready for measurements. It is simple to use, your intuition will guide you to operate the Power Analyzer touch screen correctly.
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High Impedance Active Probes
12C
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A high speed, high input impedance active probe for measuring the internal node voltage of integrated circuits. The input is 1 megohm shunted by 0.1 pf and the rise/fall times are 0.8 ns. This instrument has full dc capability and can be used with any oscilloscope. The Model 12C was specially designed so that when used in conjunction with a high input impedance oscilloscope, signal attenuation is 10:1 and with a 50 Ohm input, signal attenuation is 20:1.
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Product
DC-to-250MHz, X1/x10 Probe Kit (HP-3250i), Isolated BNC
PRB-HP-3250i
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Oscilloscope Probe 1:1-1:10 - HP-3250i250 MHz bandwidth, rated 600 V.The Oscilloscope Probe 1:1-1:10 - HP-3250i is a 1:1-1:10 selectable passive high impedance oscilloscope probe with 250 MHz bandwidth (1:10) designed and calibrated for use on oscilloscopes having an input impedance of 1 MOhm shunted by 20 pF. However, it may be compensated for use with an oscilloscope having an input capacitance of 10 to 30 pF.
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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
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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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Precision Shunt Resistors
PBV, PBH
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High power low resistance values and high precision. Low temperature coefficient. Excellent load life stability. Excellent short time over load. Ideal for current sensing applications.
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Temperature Stabilized
Multiple Current Shunt
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*IMPROVED ACCURACY*WIDE RANGE: <1 TO 300 A*HIGH IMMUNITY FROM AMBIENT TEMPERATURE CHANGESDC OR AC USE*TRANSPORTABLE*CUSTOM VALUES AVAILABLEWith new features, Ohm-Labs' model MCS Multiple Current Shunt for the first time overcomes much of the chief problem with accurate current measurement.
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Stand Alone/ Bench Top Load Cell Amplifier/ Conditioner Module
MODEL TMO-2A
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The TMO-2A Transducer Modules is a complete differential amplifier/signal conditioners with self contained power. The unit 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. Zero to full scale output is specified at 4-20 mA. The TMO-2A 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. The removal of a single capacitor will increase the frequency response DC to 60K Hz for dynamic data applications.
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CAN Sensor/ Interface
Current
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Reach Technologies’ CAN Current Sensors sense and digitize conductor current for collection via CAN. The module is ideal for conveniently adding current data to a distributed CAN network. The CAN Current Sensor is configurable via J1939 or CANopen stacks, and are available in Hall Effect and shunt variants.
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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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PXIe-4330, 25 kS/s, 24-Bit, 8-Channel PXI Strain/Bridge Input Module
781346-01
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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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Power Metering Precision Shunt Resistore
PMS
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These components have E-Beam welded manganese-copper alloy elements giving high strength, stability and reliability. Low thermal EMF and TCR. Small size and minimal power loss. Minimal heat generation and surface temperature due to small total resistance. Proprietary processing technique allows very low resistance values. Ideally suited for KWh meters and sampling sensor shunts. These units are also suitable for custom design.
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Precision Shunts
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Ohm-Labs manufactures metrology grade shunts for precise measurement of current from <1 mA to 3000 A.
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High Impedance Active Probes
34A
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Engineered to meet the stringent demands of advanced high frequency circuit designers. This high impedance probe combines full DC capability, rise/fall times of 120 ps, and a nominal loading input impedance of 10 megohm shunted by 0.1 pf. Signal attenuation is 20:1 with a 50 ohm oscilloscope input.
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48-Channel High Performance Strain Gauge Measurement Instrument
EX1629
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48-Channel High Performance Strain Gauge Measurement InstrumentSupports quarter-bridge (120, 350Ω or user defined), half-bridge or full-bridge24-bit ADCs, sampling rates up to 25 kSa/sBuilt in programmable differential excitation -8V to 8VBuilt in selectable bridge completionConfigure signal conditioning excitation and bridge completion on a per channel basisSimple, low-cost wiring using RJ-45 telecom connectorsSupports TEDS for easy transducer detection and setupRJ-45 input connector reduces setup cost and timeBuilt in self-calibration and shunt calibrationSupports voltage, ratiometric and linear measurements other than strain measurements.
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Cross Voltage Testers
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designed to perform the 60 Hz power line cross test/AC power fault tests required in GR 1089 issue 6 table 4.5 surge test 3,4, 4.3,and 6, and for UL 1950 section 6.4 paragraph 3 and 4.. Preset and Adjustable Time Settings Measuring Terminals including Voltage Sense and Current Shunt portals provide a safe location for users to accurately measure test voltages and output current while setting up tests. Calibration of the Mini_PT-600 is designed to be performed with a simple handheld multi-meter and the removable Currents Shunts can be easily sent to a calibration laboratory if required.
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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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12-Ch 10A-250VAC RCV Power Distribution Unit
YAVAR438
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- Hardware controlled Enable Input- 12 Power relays up to 10A 250VAC/DC and 300W or 2.700VA switching power- 12 10-mOhm shunt resistors.- 6 Switched 2-Pole sense channels- Single phase isolated or 3-Phases non-isolated switching capabilities, to or from the device under test (power or load)- VPC TriPaddle 96 pins connector.- NI LabView & TestStand driver.- .NET, C/C++, VB driver.- Soft Front panel for direct interface.- CAN Control or Ethernet (with Ethernet to CAN Gateway).- Self-test module available.- Form A
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Shunt Assembly
RSA-8
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The RSA-8 Recording Shunt Assembly contains 8 individual shunts with terminal block programming for either a current channel (using the shunt) or bypassing the shunt and using a dropping resistor for conversion to a voltage channel.
