Aim-TTi I-prober 520 Positional Current/Field Probe

Sale price5.990,00 kr
7.487,50 incl. VAT

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  • 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 B/W
  • Safety rated to 300V Cat II (600V Cat 1)
  • Suitable for connection to any oscilloscope
  • High accuracy general purpose H-field probe
  • Converts to 'closed magnetic circuit' current probe

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Aim-TTi I-prober 520 Positional Current/Field Probe

The Aim-TTi 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 Aim-TTi I-prober 520 enables currents, from dc up to 5MHz, to be observed and measured simply by placing its insulated tip onto the conductor.

True measurement of current requires the circuit to be broken and a current measurement device inserted (e.g. a shunt that converts current to voltage). However, breaking the circuit is impractical in many circumstances and, in the case of PCB tracks, may be impossible. Closed magnetic circuit current measurement DC capable current probes do not measure current, they measure field density. Current flowing through a conductor creates an H field which is directly proportional to the current. If a conductor is surrounded by a closed magnetic circuit of high Mu material the whole of the field is ‘captured’ by the magnetic circuit and the field density can be scaled to represent current. Conventional current probes achieve this by concentrating the field into a gap within a loop of high Mu material. The field is then measured by a field sensor inserted into the gap, often a Hall effect device. Alternatively ac current can be measured by transformer action whereby the loop of magnetic material creates a one turn primary from the conductor that is enclosed. Hybrid devices typically use a field sensor for dc and low frequencies plus a transformer for higher frequencies. Normally the probe provides a method of mechanically splitting the magnetic circuit to enable the conductor to be inserted. The position of the conductor within the loop has relatively little effect upon the measurement.

For more information: Aim-TTi l-prober 520