ETS-Lindgren 94456 Current Probe (Archived) - Manual (Page 7)

MODEL 94456 CURRENT PROBES Principles of Operation
© EMC TEST SYSTEMS, L.P. – MARCH 2002 3
REV B – PN 399265
loaded internally to provide substantially constant transfer
impedance over a wide frequency range.
SENSITIVITY
Probe sensitivity in microamperes is dependant upon the
sensitivity in microvolts of the receiving equipment with
which it is used. The following table shows the relationship
of receiving sensitivity in microvolts to the overall
sensitivity of the probe and receiver in microamperes. This
data is based on the transfer impedance of each model.
Test Equipment Sensitivity in
microvolts
94456-5
Z
T
= 0.006
Ω Ω
5 830
2 332
1 166
0.1 16.6
Table 1. Model 94456 Series Typical Sensitivity
CORE SATURATION AND
INTERMODULATION
The magnetizing effects of a primary conductor carrying
large currents at power line frequencies can saturate the
current probe core material. Core saturation produces non-
linear transforming action and can result in (a) a decrease in
the current probe RF output for a given RF current input,
and (b) modulation of the RF output by the power line
frequency.
The specified pulse duty cycle should not be exceeded or
the current probe internal load resistor (if applicable) may
Archived 6/1/10