MEASTEK MCTB3000A Flexible Rogowski Coil Current Probes

Product Introduction

1. Expansive Measurement Spectrum:

• Supports current detection from 60 amps to 1.2 megamperes

2. Precision Engineering:

• ±1% deviation tolerance at coil core positioning
• Typical ±2% measurement fidelity across full coil span (exclusive of connection zones)

3. Frequency Adaptability:

• 600kHz operational bandwidth (700mm loop configurations)
• 1MHz signal processing capacity (300mm loop systems)

4.  Space-Optimized Architecture:

• 8mm annular sensor profile (standard variant)​
• 10kV peak dielectric endurance

5.  Operational Versatility:

• Tailored for precision metering in high-amperage, elevated-power test regimes with sub-megahertz frequency requirements

Product Highlights

1. Lightweight and Flexible Coil Design

• Modular probe system: Highly pliant Rogowski windings penetrate confined geometries inaccessible to rigid sensors, enabling unobstructed access to device-under-test (DUT) interfaces.

2. Ultra-low interference performance

• Negligible insertion impedance (<1pH typical) virtually eliminates parasitic circuit interactions.
• Universal BNC interface: Streamlines integration with oscillographic systems, data acquisition modules, and precision multimeters for instantaneous signal visualization.

3. Flexible power supply options

• USB bus-powered functionality: Enables autonomous operation through standard USB ports, eliminating external power dependencies during mobile deployments.

4. Customization capabilities

• Parametric adaptation: Sensor loop dimensions and lead lengths are configurable to accommodate unique measurement environments.

Applications

1. Capacitor discharge test, ripple measurement

2. Distributed current monitoring

3. Power bus monitoring

4. Monitoring harmonics, power and power quality

5. IGBT, MOSFET tube current measurement and other applications

6. Measuring harmonic components in current

7. Detecting high-frequency sinusoidal current waveforms

8. Measuring small currents at 50/60Hz

9. Measuring small phase shifts in sine waves

10. Currents of semiconductor switches

Model Selection

Specifications

Model Specifications

• MCTB XXXXA3: Coil circumference 300mm | Bandwidth 1MHz

• MCTB XXXXA7: Coil circumference 700mm | Bandwidth 600kHz

Standard Testing Conditions
Ambient temperature 23°C | Relative humidity 60% RH | Test conductor must be vertically aligned through the probe's sensing ring center

Selection Guidelines
Model selection requires evaluation of target current ranges and coil circumference parameters. To ensure interface compatibility, consult our technical support team for specification verification prior to purchase, enabling precise model confirmation.

Environmental Characteristics

Operating Instructions

1. Measurement System Configuration

   • Connect the probe to oscilloscopes or instruments with verified grounding

   • Set input impedance to 1MΩ (minimum 100kΩ acceptable)

   • Match sensitivity settings:
     • 50mV/A sensitivity → 20X oscilloscope attenuation
     • 1mV/A sensitivity → 1000X oscilloscope attenuation

2. Power Management
   Activate using external DC 12V/5V power supply. Green LED illumination confirms proper power delivery.

3. Probe Installation

   • Fully insert current sensing ring connector until mechanical stop (audible click recommended)

   • Engage rotary locking mechanism when measuring high-vibration environments

   • Position test conductor through ring centroid to maintain ±0.5% accuracy tolerance

4. Measurement Initiation
   Energize the circuit only after completing steps 1-3 to prevent transient damage.

5. Post-Measurement Sequence

   • De-energize circuit before disconnecting probe

   • Power down measurement system

   • Store probe in anti-static packaging with desiccant

Measurement Precautions

1. Central Alignment Requirement
   Position the test conductor through the exact center of the probe ring during measurements. Off-center placement will degrade accuracy.

2. Junction Zone Avoidance
   The sensing ring's junction area exhibits maximum measurement deviation. Maintain a minimum 30mm clearance between the conductor and this high-error region.

3. Full Engagement Protocol
   Ensure the probe ring is fully inserted into its base connector (audible click confirmation) prior to measurement. Partial insertion introduces calibration errors.

4. EMI Mitigation - Low-Frequency Sources
   Maintain >1m distance from intense magnetic field sources (e.g., multi-turn inductive loads) during operation to prevent flux-induced measurement distortion.

5. EMI Mitigation - High-Speed Transients
   Avoid proximity to high-voltage transients (>100V/μs slew rates) or RF interference sources exceeding 1MHz. Such environments may trigger signal aliasing errors.

6. Ambient Noise Verification
   Perform pre-measurement interference checks:

• Position the unclamped probe ring near the test conductor

• Measure baseline noise levels using connected instrumentation

• Proceed only if interference remains below 2% of full-scale range

Maintenance & Care

1. Preserve Cleanliness: Maintain the probe in a clean, moisture-free state at all times.

2. Cleaning Protocol: If surface cleaning is required, gently wipe with a lint-free dry cloth. Chemical solvents or abrasive agents are strictly prohibited.

3. Storage Requirements: When not in use, store the probe within its original protective casing in a temperature-controlled, dust-free, and low-humidity environment.

4. Transportation Safety: During shipping or relocation, always utilize the manufacturer-provided anti-vibration packaging to prevent mechanical shocks.

5. Cable Integrity: Refrain from applying excessive tension or sharp bends to input/output cables. Avoid coiling, knotting, or angular distortions that may compromise internal conductors.

Packing List