Probing Principles
Increasing Sensitivity
If you are measuring DC or low-frequ ency
AC signals of very small amplitudes, you can
increase measurement sensitivity of your
Current Probe by d oing the following:
1. Wind several turns of the condu ctor under
test around the probe as shown. The
signal is m ultiplied by the number of turns
around the probe.
2. To o btain the actual current value, divide
the displayed amplitude by the num ber of
turns.
For example, if a conduct or is wrapped around
the p robe thre e times and the oscilloscope
shows a reading of 3 mA DC, the actu al c urrent
flow is 3 mA divided by 3, or 1 mA DC.
NOTE. Winding more turns around the probe increases the insertion impedance and reduces the upper bandwidth limit of the probe .
32 TCP0030 Current Probe Instruction Manual
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