COM-power corporation CLCI-400, Instruction Manual

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Page 18 of 30
INSTRUCTION MANUAL
SEC TI ON 4
- CALIB RATION
Rev081219
When the probe is used to measure current, the transfer impedance factors
convert the
[measured] voltage quantity present at the probe’s output port
into a current quantity corresponding to the actual current through the
conductor(s) passing through the probe aperture.
This factor includes the actual insertion loss of the probe, and also performs
the function of converting the measured voltage into a current value.
Based on the assumption that the probe is connected to a measuring
instrument having a nominal input impedance of 50 ohms, the conversion
is simple Ohm
’ s Law:
The transfer impedance factors are determined by combining the
conversion described above with the insertion loss calibration data, as
shown below:
The transfer impedance factors can be applied in practice, as follows: