Key Features:
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:
| Model | Sensitivity (mV/A) | Peak Current (kA) | Noise max (mV pk-pk) | Droop (%/ms) | LF Bandwidth (Hz) | HF Bandwidth (MHz) |
| CWT015 | 200 | 0.03 | 6.5 | 130 | 150 | 5 |
| CWT03 | 100 | 0.06 | 4.5 | 90 | 105 | 8.5 |
| CWT06 | 50 | 0.12 | 3 | 70 | 80 | 17 |
| CWT1 | 20 | 0.3 | 2.5 | 40 | 50 | 17 |
| CWT3 | 10 | 0.6 | 8 | 3 | 3.5 | 17 |
| CWT6 | 5 | 1.2 | 14 | 0.9 | 1 | 17 |
| CWT15 | 2 | 3 | 7 | 0.7 | 0.8 | 17 |
| CWT30 | 1 | 6 | 5 | 0.5 | 0.6 | 17 |
| CWT60 | 0.5 | 12 | 3.5 | 0.35 | 0.4 | 17 |
| CWT150 | 0.2 | 30 | 3 | 0.2 | 0.2 | 17 |
| CWT300 | 0.1 | 60 | 3 | 0.1 | 0.1 | 17 |
| CWT600 | 0.05 | 120 | 3 | 0.06 | 0.05 | 17 |
| CWT1500 | 0.02 | 300 | 3 | 0.035 | 0.03 | 17 |
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.