I-prober 520 of AIM-TTi
Observe & measure currents in PCB tracks, captive component leads & ground planes

The I-prober 520 achieves something radically new. It can observe and measure currents in PCB tracks and other conductors where conventional current probes can’t be used. This includes captive wires into components, the legs of integrated circuits, and PCB ground planes. Conventionally, current can only be measured by either breaking the circuit to insert a shunt resistor, or by surrounding the conductor by a loop of magnetic material as in a standard current probe.
The I-prober 520 enables currents, from dc up to 5MHz, to be observed and measured simply by placing its insulated tip onto the conductor.
The concept of a positional current probe is not entirely new. However, previous attempts have been physically large and suitable only for measuring high currents at low bandwidth. The high excitation frequency miniature sensor within the I-prober 520 provides it with levels of positional accuracy, sensitivity, bandwidth and dynamic range that are superior to anything previously achieved by several orders of magnitude. In consequence, the Aim I-prober 520 is the first and only probe that can be used to measure currents from amps down to milliamps at frequencies from DC up to MHz, making practical measurement of PCB track currents a reality.

Key Features

  • Current measurement from insulated probing of conductor
  • Suitable for observation and measurement of current in PCB tracks, component leads and ground planes
  • Wide dynamic range of 10mA to 20A peak to peak
  • Wide bandwidth of DC to 5MHz
  • Low noise figure equivalent to <6mA rms at full bandwidth
  • Safety rated to 300V Cat II (600V Cat I)
  • Suitable for connection to any oscilloscope
  • High accuracy general purpose H-field probe
  • Converts to standard ‘closed magnetic circuit’ current probe

Unique Capabilities

  • No requirement to break or surround the conductor
  • Observe and measure currents in PCB tracks directly
  • Minimal disturbance to circuit conditions through very low  insertion impedance and stray capacitance
  • Useable in confined and difficult to access spaces
  • Measures current into surface mount components, IC legs and short component leads
  • Can observe currents flowing within ground planes
  • Useable on high voltage conductors and in high temperature areas