ETS-Lindgren 94456 Current Probe (Archived) - Manual (Page 9)

MODEL 94456 CURRENT PROBES Installation
© EMC TEST SYSTEMS, L.P. – MARCH 2002 5
REV B – PN 399265
INSTALLATION
This section describes methods for setting up the current
probe and associated measuring equipment. Operating
procedures are contained in the Operation section.
EQUIPMENT SETUP
In measuring the RF current in a single conductor, the
probe jaws are placed around the conductor so that the
conductor passes through the center opening and then the
jaws are locked together. In the case of a two-conductor
cable, the probe can be used to evaluate the common mode
component of the noise current (the net effect of the
currents leaving and returning) by placing the probe over
both conductors at the same time, or the interference
current in either conductor can be measured separately by
placing the probe over each wire individually.
In a more complex case of multi-conductor cables, the
probe will measure the net external effects of all the
currents in the conductors that pass through the center of
the probe.
When placed over shielding conduit, coaxial cable, or
ignition shielding, the probe measures the current flowing
on the external surface of the shield. The probe can thus be
used to evaluate the shielding effectiveness.
NOTE: Standing waves can exist on the test conductor
under test at or near its resonant frequency. Under these
Archived 6/1/10