Teledyne LeCroy CP500 - Manual (Page 13)

Instruction Manual
922176-00 Rev A 7
Figure 2. Insertion Impedance B
In a closed loop AC/DC current probe, the magnetizing inductance term drops out because the bucking
coil prevents the core from being magnetized (Figure 2). In addition to the impedance resulting from
probe insertion, any loop wire added to the conductor to gain access to the conductor will increase the
total impedance of the conductor.
Care and Maintenance
Cleaning
The exterior of the probe and cable should be cleaned only using a soft cloth moistened with water or
isopropyl alcohol. The use of abrasive agent, strong detergents or other solvents may damage the
probe.
CAUTION. The probe case is not sealed and should never be immersed in any fluid.
Cleaning Core Surfaces
To clean the transformer core surfaces, open the locking lever and clean the exposed core surfaces with
a cotton swab dampened with isopropyl or ethyl alcohol.
In no case should the core surfaces be lubricated. Any lubrication between the mating surfaces will
degrade the performance of the current probe should be removed with isopropyl or ethyl alcohol.
Calibration Interval
The recommended calibration interval is one year. Adjustment should only be performed by qualified
personnel. (A Performance Verification / Adjustment procedure is included in this manual.)