SECTION
4
MAINTENANCE
Introduction
The information in this section is intended to help in re
�oving and replacing parts in the P602 1 Current Probe and
Termination. When parts are replaced in either the probe or
termination, it will be necessary to check the performance to
determine if recalibration is needed. Refer to Section 5 for
test equipment required to check the operation of the probe
and termination.
Cleaning the Current Probe
The current probe should be taken apart and cleaned
periodically, depending upon the local conditions. Use a
soft bristle brush to dislodge the dust and wipe clean with
a soft cloth. If a persistent coating of dirt remains, it can
be removed by washing the plastic portions of the probe in
warm water with some liquid detergent added. Allow the
parts to air dry thoroughly, or wipe dry with a lint-free cloth.
Apply a coating of Lubriplate or similar lubricant to the
contact areas of the spring.
While cleaning the probe, make a visual check of the
probe parts. Look for any excessive wear of the slide parts
which might cause improper operation later on.
NOTE
Do not use any organic solvents to clean the
probe.
Probe Disassembly
1. Hold the probe in a horizontal position with the slider
up.
2. Move the strain relief boot back over the cable.
3. Carefully lift the upper half of the probe body slightly
at the cable end and remove from the assembly.
4. Remove the small metal ball from the detent In the
slider.
5. Lift the back of the return spring retainer out of the
holder.
6. Remove the slider, spring, retainer, and the top of the
transformer as a unit. Note the position of the movable
portion of the transformer in the slider.
7. Remove the two Phillips-head screws which secure the
spring retainer holder to the probe body. Remove the
holder.
8. Lift the circuit board, transformer, and cable out of the
probe body as a unit. The transformer may be unplugged
from the circuit board. The P6021 Current Probe is shown
disassembled in the Mechanical Parts List section.
9. Reassemble the probe, reversing the above procedure.
Repairing the Current Probe
To make repairs inside the body, take the probe apart as
described previously. When soldering on the circuit board,
observe normal circuit board techniques, using a minimum
of heat. When replacing the current transformer, replace
the entire assembly, including the core mounted in the slide.
The transformer assembly is matched at the factory before
shipment.
Repairing the Termination
Replacement of Connectors
1. Remove the plastic snap-on cover from the front of the
termination. This can be done with the fingers, or by insert
ing a small screwdriver between the cover and the termi
nation near the part number, and turning slightly.
2. Using a heat sink, unsolder the lead(s) from the defec
tive connector.
3. Unscrew the defective connector and remove it.
4. Replace the connector by reversing the above proce
dure. When replacing the front cover, align the switch with
the slider in the front cover.
Removal of Circuit Board
1. Remove the plastic snap-on covers from the front and
back of the termination.
2. Using a heat sink, unsolder the leads from the con
nectors.
3. Remove the two screws from the back of the circuit
board.
4. Remove the circuit board from the termination. When
soldering on the circuit board, observe normal circuit board
techniques, using a minimum of heat.
5. Replace the circuit board by reversing the above pro
cedure. When replacing the front cover, align the switch
with the slider in the front cover.
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