The Rohde & Schwarz EZ-17 Current Probe is a transformer-based RF current measurement instrument that clamps around current-carrying conductors to deliver a voltage output proportional to primary current. Operating from 20 Hz to 100 MHz (extending to 245 MHz in specific applications), the EZ-17 addresses demanding EMC test environments including emission measurements, shielding effectiveness characterization, and immunity testing with bulk current injection.
The probe accommodates DC and AC currents up to 300 A with exceptional magnetic overload capacity, enabling reliable operation on three-phase power lines without degradation of RF measurements. Its 30 mm inner diameter and spring-loaded clamping mechanism integrate quickly into confined test setups. Model 02 targets emission and shielding effectiveness work under CISPR 16-1-2 calibration; Model 03 delivers high load capacity for immunity and BCI applications.
Technical Specifications
• Frequency Range: 20 Hz to 100 MHz (up to 245 MHz in specific applications)
• Inner Diameter: 30 mm
• Load Capacity: DC and AC currents up to 300 A
• Output Impedance: 50 Ω (Model 02 above 1 MHz)
• Measurement Principle: Current transformer with voltage output proportional to primary current
• Transducer Factor: Tabulated from 20 Hz to 245 MHz; k = 20log(1/ZT) where ZT is transfer impedance
• Clamping Mechanism: Spring-loaded
• Shielding: Electrostatic shielding integrated
• Calibration Standard: CISPR 16-1-2
– Key Features
• High magnetic overload capacity for three-phase applications up to 300 A
• Compact design with spring-loaded clamping for rapid deployment
• Electrostatic shielding maintains measurement integrity in RF-rich environments
• Model variants address distinct test methodologies
– Typical Applications
• Emission measurements per CISPR 14-1, CISPR 25, CISPR 32, MIL-STD-461
• RF cable shielding effectiveness characterization
• Immunity testing and bulk current injection
– Compatibility & Integration
The 50 Ω output impedance (Model 02 above 1 MHz) ensures compatibility with standard RF test instrumentation. Transducer factor documentation accompanies delivery for direct traceability across the operating bandwidth.
