HP 8481A - Page 24

HP 8481A/82 A/83 A
08481-90049
Place a very small amount (use the point of a wooden toothpick)
of red anaerobic sealant A1MP9, on the threads of A1MP4. Be
careful not to get any sealant near the insulator.
Use your fingers to screw the center contact A1MP4 into the
center conductor A1MP6 until tight. The round insulator should
be squeezed tight enough so that it will not rotate. Do not
scratch or burr the two shafts.
Place the spring A1MP5 into A1MP6.
Patiently place the sliding contact (snowflake) A1MP7 so that
the snowflake fi ngers (without being damaged) surround the
spring and press against the inner surface of center conductor
A1MP6. The snowflake should spring back when pressed.
b.
c.
d.
e.
Figure 7. A1 Bulkhead Center Contact Assembly
7. Screw the bulkhead into the center pin assembly
as shown in fi gure
8. Tighten in place to 50 ±5 in-lbs (565 N-cm)
8. Use the appropriate gage to verify pin depth. When pin depth is
correct go to next step, “Cartridge Replacement”.
Cartridge Replacement. If you do not need to replace the inner and
outer conductors of your bulkhead, start here. The procedure assumes
the bulkhead assembly is removed from the Power Sensor.
9. Order one cartridge replacement A1MP13 from the
replaceable
parts list.
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