User Manual

Probing Principles
Increasing Sensitivity
If you are measuring DC or low-frequency
AC signals of very small amplitudes, you can
increase measurement sensitivity of your
current probe by doing the follo wing:
1. Wind several turns of the conductor under
test around the probe as shown. The
signal is m ultiplied by the number of turns
around the probe.
2. To obtain the actual current value, divide
the displayed amplitude by the num ber of
turns.
For example, if a condu ctor is wrapped
around the probe five times and the
oscilloscope shows a reading of 5 mA DC,
the actual current flow is 5 mA divided by
5, or 1 mA DC.
NOTE. Winding more turns around the probe increases the insertion impedance and reduces the upper bandwidth limit of the probe .
36 TCP0150 Current Probe Instruction Manual