Current probes usually serve as a transducer by converting current to voltage. They measure common mode antenna currents that flow on cables or wires. When selecting a current probe, it is important to consider the required frequency range for the test, the size of the harness to be measured, and the probe's sensitivity to measuring signals at the limit level.
Current probes work by placing a conductor that carries the current to the sensing window of the probe and then testing the probe's output voltage with the RF detector. The calibration factor of the current probe is called a transfer impedance curve and is given in W or dB(W). Each probe has a frequency range that is found in the impedance curve.
Current probes are convenient for establishing EMC compliance before beginning a test or while preparing for testing because a defective filter or bonded cable could cause radiated emissions failure, wasting time and money.
Avalon Test Equipment carries a variety of current probes from top manufacturers (Keysight, LeCroy, and more) to meet testing requirements.
Rent or purchase from Avalon and Test With Confidence®.
1400V, 100MHz is a high-voltage active differential probe that is safe and easy-to-use ideally suited for measuring power electronics. The ADP305 is designed for measuring the high-speed floating voltages found in high-speed power electronics.
The Teledyne LeCroy CP030A Current Probe was designed with a small form factor for crowded boards. The small jaw can probe currents in tight
spaces and still clamp onto conductors up to 5mm in diameter. Continuous currents of 30Arms and peak currents
of 50A can be measured by the CP030, which also features a 50MHz bandwidth.
The PPE series of probes are suitable for a wide range of applications where high-voltage measurements must be made safely and accurately. There are five fixed-attenuation probes covering a range from 2 kV to 20 kV, and one switchable probe providing ÷10/÷100 attenuation for voltage inputs up to 1.2 kV.
New technology which utilizes hybrid circuitry (and switch reading for probes with switchable gain/attenuation) minimizes ringing and overshoot to provide a precise response.