Owon CP024 High-Frequency AC/DC Current Probe

The Owon CP024 is a precision current probe designed for the non-intrusive measurement of complex current waveforms in high-power electronics. While standard current clamps are limited to fundamental power-line frequencies, the CP024 provides the high-frequency response necessary to capture the fast switching transients and common-mode noise inherent in modern VSDs, Inverters, and high-frequency power converters. Measuring common-mode current is the first step in solving 'ghost' faults in automation. A standard multimeter clamp won't show you the 200 kHz switching noise peaks that typically cause false E-stop or IO triggering or comms disruptions. The CP024 acts as the high-speed interface, converting these current transients into a voltage signal that any oscilloscope or spectrum analyser can interpret with metrological integrity.
High-Frequency Common-Mode Analysis

Common-mode current (leakage) is a common root cause of system and component failure in industrial environments. The CP024 is specifically engineered to handle the steep dI/dt found in high-power switching electronics. Its utility is amplified when integrated into the following diagnostic workflows:

- Universal Compatibility: Equipped with a standard BNC interface, the CP024 is compatible with any oscilloscope, providing a safe and isolated way to observe current waveforms on the 400V rail.
- With the Owon HSA Spectrum Analyser: Transform your handheld spectrum analyser into a high-frequency current analyser. Identify exactly which harmonic clusters are leaking through the cable shielding and into the plant's ground plane.
- With the Owon CMS Clamping Scope Meter: Pair the CP024 with the Owon CMS Clamping Scope Multimeter for a highly cost-effective, portable diagnostic station. This combination allows technicians to verify common-mode current magnitudes in real-time without the bulk of a full benchtop laboratory. Measurement Features & Field Serviceability

Accuracy in high-power environments requires more than just a wide bandwidth; it requires stability and noise rejection. The CP024 is designed for high-fidelity signal reproduction and ease of use in the field:

- Triple Range Sensitivity: Features 4A, 40A, and 400A selectable ranges via a rugged toggle switch for optimal resolution across different power levels. This ensures compatibility and optimal.
- One-Touch Zeroing: Dedicated ZERO key for quick DC offset compensation. The unit also features an Auto-Zero function upon power-up to ensure an immediate stable baseline.
- Field Serviceable: Powered by a standard 9V 6F22 battery, housed in a screw-secured compartment, ensuring you aren't sidelined by proprietary charging issues during a breakdown. Technical Specifications Characteristic Specification Frequency Range DC to 200 kHz (-3dB) Measurement Ranges 4A - 40A - 400A (Peak) Output Sensitivity 100 mV/A (4A) - 10 mV/A (40A) - 10 mV/A (400A) Accuracy (DC) ±1.5% rdg ±5 digits (up to 300A) Maximum Jaw Opening 23 mm (Designed for industrial motor leads) Resolution 10 mA (Minimum) Power Source 9V 6F22 Battery (Included) Dimensions 180mm x 44mm x 30mm - Approx. 200g

Practical Operational Utility

For the automation engineer or plant electrician, the CP024 is the bridge between "suspecting" noise and "proving" its existence. By observing the current in the time domain, you can correlate drive switching events with communication errors; by observing it in the frequency domain with a spectrum analyser, you can verify the effectiveness of EMI filters and shielding upgrades.

Diagnostic Tip: When testing for common-mode leakage, clamp the CP024 around all three phases (U, V, W) simultaneously. Any signal observed on the scope or spectrum analyser is the vector sum of the currents—representing the leakage escaping back to the source via the ground system.