Teledyne LeCroy CP500 - Manual (Page 12)

CP500 Current Probe
6 922176-00 Rev A
An Auto Zero is automatically performed as part of the degauss cycle.
NOTE: Never install or remove the probe on bare conductors which are energized. The transformer core
and shield are grounded but not insulated and may contact the conductor when the locking lever is
open.
Degauss the probe in any of these cases:
• After turning on the oscilloscope and probe
• After connecting the probe to the oscilloscope
• Before connecting the probe to the circuit under test
• Whenever an overload conditions occurred
• Whenever the probe is subjected to strong magnetic field
Insertion Impedance
Connecting a current probe to a circuit under test may alter the characteristics of this circuit because of
the impedance represented by the current probe.
In the case of an AC current probe, or open loop AC/DC current probe, two elements are added: the
leakage inductance and magnetizing inductance shunted with a small resistance. Refer to Figure 1.
Figure 1. Insertion Impedance A