Non-intrusive measurement: Observe and measure currents directly from PCB tracks, cables, and component leads.
Wide dynamic range: Measures currents from 10mA to 20A peak-to-peak.
High bandwidth: Capable of measuring signals from DC to 5MHz.
Low noise: Equivalent to <6mA RMS at full bandwidth.
Minimal circuit disturbance: Low insertion impedance and stray capacitance.
High accuracy: Suitable for connection to any oscilloscope.
Safety rated: 300V Cat II (600V Cat I), compliant with EN61010-1 and EN61010-031.

Technical Specifications:

Modes of Operation:

PCB Track Current Measurement:
Non-contact, non-intrusive measurement for PCB tracks.
Ideal for analyzing currents in high-density circuit boards without requiring disconnection.
Wide dynamic range with low noise performance, making it suitable for various applications.
DC to 5MHz bandwidth, with risetime < 70ns.

Closed-Loop Current Measurement (Wire Mode):
Converts into a conventional “closed magnetic circuit” current probe using the included clip-on toroid assembly.
Measures current in a wire without needing disconnection.
Wide dynamic range, enhanced accuracy, and high rejection of unwanted fields.
1 volt per amp output in Wire Mode.

Electromagnetic Field Measurement (Field Mode):
Measures magnetic fields with 250uT per Volt scaling.
Accurate determination of field sources, enabling engineers to pinpoint the source of electromagnetic interference (EMI).
Field measurement in Teslas or amps per meter.

Additional Features:

Overload Indicator: An LED indicator will light up if the output voltage exceeds ±10V or large magnetic fields cause system saturation.
Calibrator for PCB Measurement: The built-in calibrator allows for fine-tuning sensitivity to match various PCB track widths, ensuring accurate measurements.
Switchable Filters: Bandwidth control for DC to 5MHz, 500kHz, and 2Hz, giving flexibility based on the application and signal type.

Applications:

Current Measurement in PCB Tracks: Non-contact probing of high-density boards, component leads, and fine tracks.
Closed-Loop Current Measurement: With the clip-on toroid, the probe works like a traditional current clamp for measuring currents in wires.
Electromagnetic Field Detection: Measure and analyze magnetic fields generated by components and systems.
VSD (Variable Speed Drive) Testing: Ideal for measuring bearing spark erosion currents and common-mode currents in high-frequency systems.

The I-Prober 520 includes the probe, signal conditioner, clip-on toroid, calibrator, power adapter, and BNC-BNC cable.

Powertek I-Prober 520 Datasheet

The post I-Prober 520 Non Clamp Current Probe first appeared on Westek Electronics.

Ideal for Detecting Bearing Spark Erosion Currents in AC motor drives and high-frequency common mode currents.
Flexible Clip-around Coil: Easy installation around large conductors without interrupting the circuit.
Wide Coil Lengths: Available in 500mm, 700mm, and 1000mm standard lengths. Custom lengths available upon request.
High Peak Current Handling: From 10A peak to 150A peak.
High-Frequency Bandwidth: Up to 14MHz (-3dB) for the CMC06 model.
Low-Frequency Attenuation: Gain of typically -90dB at 50Hz to suppress large fundamental frequency currents.
Accurate Measurements: ±0.5% calibrated accuracy with conductor centrally positioned.
Operating Temperature: 0°C to +40°C for the integrator electronics, -20°C to +90°C for the coil and cable.

Technical Specifications:

Performance Characteristics:

Low-Frequency Attenuation:
The CMC06 integrator is designed to attenuate low-frequency components, such as fundamental 50Hz currents, with a gain of -90dB at 50Hz. This ensures minimal interference from low-frequency currents, allowing accurate measurement of high-frequency common mode currents.

High-Frequency Response:
The high-frequency response is determined by coil length, cable length, and integrator design. For the CMC06 with a 1000mm coil, the high-frequency bandwidth reaches up to 14MHz, allowing accurate measurement of fast transients.

Noise Characteristics:
The low-noise integrator design enhances the accuracy of high-frequency current measurements, offering a wide dynamic measurement range. Noise levels are kept minimal to ensure precise readings in challenging environments.

Delay Characteristics:
A predictable delay exists between the current and output signal, which is influenced by the coil and cable length. For the CMC03/B/2.5/1000, the delay is approximately 35ns.

Applications:

Measurement of Bearing Spark Erosion Currents: Detect high-frequency current flow through motor bearings in AC drive systems, preventing premature failure.
High-Frequency Common Mode Currents: Identify and monitor common mode currents in large motor drives and variable speed drives (VSDs).
Mitigation Verification: Use the probe to evaluate the effectiveness of grounding or filtering techniques designed to minimize bearing currents.

Ordering Information:

CMC Datasheet

The post CMC Rogowski Current Probe first appeared on Westek Electronics.

Ultra-thin 1.7mm Coil: Fits between the legs of a TO-220 semiconductor.
Peak Current Ratings: Ranges from 30Apk to 6000Apk.
High Sensitivity: Set to provide ±6V peak output (e.g., 20mV/A for ±300A peak).
High Bandwidth: Up to 30MHz for high-frequency current measurement.
Flexible Clip-around Coil: Non-intrusive current monitoring in tight spaces.
1.2kV Peak Voltage Isolation: Ensures safe operation in high-voltage environments.
Accuracy: Typically 0.2% of reading.
80mm Coil Length: Suitable for tight configurations and confined spaces.

CWT ULTRA Mini Current Probe Models:

Technical Specifications:

Accuracy and Linearity:

Accuracy: Typically 0.2% with the conductor centered in the loop.
Linearity: ±0.05% of full scale.
Maximum di/dt: 70.0 kA/µs peak, all models are rated up to 1.2kA/µs.

Coil and Cable Specifications:

Coil Circumference: 80mm.
Coil Cross Section: 1.7mm.
Peak Voltage Isolation: 1.2kV.
Flash Testing: Coils are flash tested at 3kVrms for 60 seconds.
Operating Temperature: -40°C to +125°C (coil).
Cable Length: 1m (connecting coil to integrator box).

Power and Mechanical:

Power Supply:
Battery: Four AA 1.5V standard alkaline batteries with a typical life of 70 hours.
DC Input: 12-24V DC via a 2.1mm socket (batteries inoperative when DC supply is present).
Rechargeable Option: NiMH batteries with 30-hour life, rechargeable via DC input.
Integrator Box Dimensions:
Height: 183mm
Width: 93mm
Depth: 32mm
Output Socket: BNC (50-ohm impedance) with 0.5m BNC-BNC coaxial cable supplied.

CWT Ultra-Mini Datasheet

The post CWT Ultra-Miniature High Frequency Current Probe first appeared on Westek Electronics.

Miniature Coil Design: Thin 3.5mm cross-section for fitting into tight spaces.
High Frequency Bandwidth: Up to 20MHz, ideal for switching transients and pulsed current measurements.
Wide Current Range: Measures currents from 300mA up to 300kA.
Flexible Clip-On Coil: Allows for non-invasive current measurement.
Peak Voltage Isolation: Options for 2kV or 5kV insulation, ensuring safe operation in high-voltage environments.
Power Options: Operates on AA batteries or rechargeable batteries with a 12-24V DC input socket.

CWT Mini Rogowski Coil Specifications:

Technical Specifications:

Available Peak Current Ratings: 0.03kA to 300kA (depending on model).
Bandwidth: 0.1Hz to 17MHz.
Accuracy: Typically 2% of reading.
DC Offset: No greater than 2mV.
Coil Lengths: 100mm and 200mm (custom lengths available up to 1000mm).
Coil Cross Section: 3.5mm for 2kV insulation and 4.5mm for 5kV insulation.
Cable Length: 1m to 4m, depending on the model.
Peak Voltage Isolation: Options for 2kV or 5kV.

Power Supply Options:

Battery-Powered: Four AA batteries, providing a typical life of 70 hours.
Rechargeable: NiMH batteries (optional) with 30-hour life and 12-24V DC input.
AC/DC Adapter: Can power the unit from either 115Vac or 230Vac. Specify the adapter type upon ordering.

Typical Applications:

Power Electronics: Ideal for measuring switching transients in IGBT, MOSFET, and GaN devices.
Semiconductor Testing: Effective for monitoring pulsed currents in power semiconductor devices.
High Voltage Applications: Safe for high voltage environments with 2kV or 5kV insulation.
Induction Heating: Measures high-frequency signals, peak transients, and harmonic effects.
Pulsed Current Monitoring: Suitable for capacitor discharge, lightning strikes, and other high-energy events.

Ordering Information:

Example 1: CWT Mini 015, B (Battery-powered), 100mm coil, 1m cable, 5kV insulation.
Example 2: CWT Mini 30, B (Battery-powered), 200mm coil, 2.5m cable, 2kV insulation.
Example 3: CWT Mini 06, R (Rechargeable battery), 100mm coil, 2.5m cable, 5kV insulation.

Each CWT Mini unit is supplied with a BNC-BNC cable, 12-24V DC adapter, user manual, factory calibration certificate, and hard carry case.

The post CWT Mini Clip On High Frequency Current Probe first appeared on Westek Electronics.

Miniature Coil Design: Slim, 3.5mm cross-section coil fits into tight spaces, making it ideal for semiconductor power switching devices.
High Frequency Bandwidth: Up to 50MHz (-3dB), enabling accurate measurements of switching transients and pulsed currents.
Wide Current Range: Capable of measuring currents from 300mA to 30kA.
Peak di/dt Capability: Measures peak di/dt up to 100kA/µs, ideal for detecting fast current transients.
Wide Operating Temperature: The probe operates in temperatures from -40°C to +125°C, suitable for harsh environments.
High Voltage Insulation: The coil features 5kV peak voltage insulation, ensuring safety during high-voltage applications.
Rogowski Coil Technology: Ensures faithful conversion of current to voltage, offering high bandwidth performance and low interference.
Electrostatic Shield: Provides immunity to interference from fast dV/dt transients and large 50/60Hz voltages.
Clip-around Coil: Flexible and easy to install, the clip-around coil makes it possible to measure currents in difficult-to-reach areas.

Available Models and Specifications:

Technical Specifications:

Peak Current Ratings: 0.03kA to 6.0kA (Higher ratings available)
Bandwidth: 0.1Hz to 50MHz
Accuracy: Typically 2% of the reading
DC Offset: No greater than 2mV
Coil Lengths: Available in 100mm and 200mm lengths (custom lengths up to 1000mm available)
Coil Cross Section: 4.5mm for 5kV peak voltage isolation
Cable Length: 1m, 2.5m, or 4m (specific models have maximum cable lengths: CWT015 max 1m, CWT03 max 1.5m, CWT06 max 2.5m)
Peak Voltage Isolation: 5kV (flash tested at 8kVrms for 60 seconds)
Temperature Range: -40°C to +125°C

Power Supply Options:

Battery: 4 AA lithium batteries (25-hour life) with 12-24V DC input socket.
Rechargeable: NiMH batteries (10-hour life) with 12-24V DC input socket. Rechargeable option comes with an AC/DC adapter for charging.

Typical Applications:

Power Electronics: Ideal for measuring high-frequency switching transients in IGBT and GaN devices.
Semiconductor Devices: Suitable for testing MOSFETs, IGBTs, and other high-speed switching devices.
Pulsed Current Measurement: For applications such as capacitor discharge, circuit breaker testing, and lightning strike research.
Induction Heating: Measures high-frequency, high-current signals, including harmonics and peak current transients.

Ordering Information:

Model Example: CWTMini50HF 06, 100mm coil, 2.5m cable, rechargeable power option (R).
Included Accessories: BNC-BNC cable, 12-24V DC adapter, user manual, factory calibration, and hard carry case.

The post CWTMini50 HF – High Frequency Current Probe 50MHz first appeared on Westek Electronics.

Miniature Coil Design: The small coil (3.5mm cross-section) allows installation in compact spaces, such as between semiconductor device legs.
High Frequency Bandwidth: Provides a wide bandwidth of up to 30MHz, making it ideal for measuring switching transients and pulsed currents.
High Peak di/dt Measurement: Can measure di/dt of up to 100kA/µs, providing accurate transient current measurement for power electronics.
Wide Operating Temperature Range: Suitable for harsh environments with an operating range from -40°C to +125°C.
Rogowski Coil Technology: Based on Rogowski Coil technology, which ensures accurate conversion of current to voltage for measurement.
Clip-around Coil: The flexible coil allows easy installation without disrupting active power systems.
Electrostatic Shield: Innovative electrostatic shielding provides excellent immunity to interference from fast dV/dt transients or large 50/60Hz voltages.
Peak Voltage Isolation: The coil is insulated with 5kV peak isolation, and can withstand up to 8kVrms for 60 seconds.
Battery and Rechargeable Options: Powered by 4 AA lithium batteries (90 hours) or via a 12-24V DC input. Rechargeable battery options are also available.

Available Models and Specifications:

Power and Environmental Specifications:

Power Supply Options:
Standard: 4 AA batteries (90 hours typical life) with 12-24V DC input option.
Rechargeable: NiMH batteries (10 hours life, 40 hours recharge time) with 12-24V DC input.
Operating Temperature Range: -40°C to +125°C for the coil, 0°C to +40°C for the integrator.
Coil Voltage Isolation: 5kV peak, flash tested at 8kVrms for 60 seconds.
Coil Lengths Available: 100mm or 200mm, with custom lengths available upon request.
Cable Lengths: 1m, 2.5m, or 4m.

Applications:

Power Electronic Devices: Suitable for measuring high-frequency switching transients in IGBT and MOSFET-based devices.
Pulsed Current Applications: Effective in measuring capacitor discharge and circuit breaker interruption currents.
Semiconductor Devices: Ideal for GaN and Silicon carbide-based devices operating at high speeds.
Motor Drives and Inverters: Accurate measurement of current waveforms in high-performance motor control systems.

Ordering Information:

Example Model: CWT MiniHF 06, 100mm coil, 2.5m cable, rechargeable power option (R).
Accessories: Includes a BNC-BNC cable, 12-24V DC adapter, user manual, and calibration certificate.

The post CWTMiniHF – High Frequency Rogowski Coil first appeared on Westek Electronics.

Wide Bandwidth: Ranges from 1Hz to 16MHz, ensuring accurate current measurements in low to high-frequency applications.
Rugged and Flexible Design: The flexible clip-on coil allows easy installation around conductors, even in confined spaces. It can be installed without disrupting active power systems.
High Accuracy: Provides 0.2% accuracy, suitable for a wide range of power electronic applications.
High Dynamic Range: Covers a current measurement range from 300mA to 1200kA, depending on the model.
10kV Insulation Capability: Standard models offer up to 10kVrms insulation, with options for increased insulation available for high-voltage applications.
Low Phase Shift: Phase shift is as low as 0.1° across the low-frequency range (<1Hz), ensuring accurate power measurements and analysis.
Isolated ±6V Output: Provides an instantaneous isolated output, compatible with oscilloscopes, PCI DAC cards, and power analyzers.
Power Supply Options: Operates with 4 AA batteries or a 12-24V AC adapter, with an optional rechargeable battery version available.
Traceable Calibration: Each unit comes with a calibration certificate traceable to international standards, ensuring reliable performance.
CE Marked: Compliant with European safety and quality standards.

CWT Models Overview:

Typical Applications:

Power Analyzers: Extend current and power measurement ranges without bandwidth degradation.
Motor Drives and Power Electronic Converters: Measure switching times, gate turn-on/off times, and peak currents for semiconductor devices like GaN and IGBT.
AC Motors and Generators: Diagnose performance and installation without disassembling existing circuits.
Induction Heating: Monitor high-frequency current signals and harmonic effects.
Pulsed Current Applications: Measure peak currents in semiconductor switches, capacitor discharge systems, and circuit breakers.
Capacitor Discharge and Lightning Strike Research: Analyze transient and repetitive peak currents.

Environmental Specifications:

Operating Temperature Range: -20°C to +100°C
Storage Temperature Range: 0°C to +40°C
Power Supply: 4 x AA batteries or 12-24V DC adapter (115V or 230V AC)
Cable Length Options: 2.5m or 4m
Coil Cross Section: 8.5mm (standard insulation) or 14mm (with protection sleeve)
Output Connector: BNC (50-ohm impedance)

Power Input:

Battery Life: Typical life of 90 hours with AA batteries.
Rechargeable Option (R Version): Includes an internal charger, allowing continuous use when connected to an external power source.

The PEM CWT current sensors are highly versatile, offering precision, flexibility, and ease of use for demanding power electronic applications. Whether for low-frequency, high-current measurements or high-frequency switching analysis, the CWT range provides the performance needed for accurate and reliable results.
Each unit is supplied with a BNC cable, power adapter, calibration certificate, and user manual.

CWT Datasheet

The post PEM CWT Current Probes first appeared on Westek Electronics.

Wide Bandwidth: 0.001Hz to 6.5MHz, ensuring comprehensive current measurement.
Flexible Clip-on Design: A clip-around, flexible sense coil for non-intrusive measurement, making it easy to install without interrupting active power systems.
Insulation: Standard insulation up to 10kVrms, with options for increased insulation levels.
Accurate Current Measurement: Can measure a broad range of current, from small to large (1A to 600kA), with ±0.2% accuracy and low phase shift (0.1-0.2 degrees).
Power Supply Options: Powered by 4 AA batteries or a 12V adapter, with an option for rechargeable batteries and an internal charger.

Technical Specifications:

For miniature coils with 3.5mm and 4.5mm diameters:

Applications:

Power Analyzers: Expand the current and power measurement range with low-frequency performance (down to 0.5Hz) without bandwidth loss.
Motor Drives & Power Converters: Measure IGBT switching times and peak currents in motor drives and converters.
Induction Heating: Monitor high currents and frequencies, capturing harmonic effects.
Semiconductor Applications: Ideal for monitoring pulsed current in semiconductor devices such as IGBT, power MOSFETs, and for capacitor discharge and circuit breaker research.
Lightning Strike Research: Accurate measurement of peak currents in capacitor discharge and lightning-related experiments.

Accessories:

All CWT LF models come with:
BNC-BNC cable
12-24V DC input
4 AA batteries
Universal power adapter (110V/230V)
Calibration certificate
Carry case

CWT LF Datasheet

The post CWT LF Wideband Clip-on type Current Probes. first appeared on Westek Electronics.