Revision A
Dash 3000/4000 Patient Monitor
5-15
2000966-339
Troubleshooting:
Power Source Tests
2. Use a DMM to measure the ground-to-neutral loop resistance.
CAUTION
DO NOT check the ground-neutral loop resistance unless
the wall receptacle is correctly wired.
a. Select the milliohms (m
Ω
) scale on the DMM.
b. Measure resistance across the power cord ground and neutral.
c. Measure from the ground lug on the rear power connector to any
exposed metal of the monitor. The resistance between the ground
and neutral connections, after the ohmmeter is nulled, must be
less than 100 m
Ω
. If not, have the wall receptacle checked by an
electrician.
Power Cord and Plug
Verify the power cord being used with the monitor is good. The following
are a couple of things to check for in this regard:
Failure of the power cord strain relief is very common. Often times
users of the equipment pull on the power cord itself, rather than the
power cord plug, to unplug the monitor from a wall receptacle. If in
doubt, test for continuity through each conductor of the power cord
connector and plug.
Verify line, neutral, and ground conductors are properly connected to
the power cord plug and are not short-circuited. Rewire and tighten
these, or replace the power cord, as necessary.
Содержание Dash 3000
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Страница 236: ...9 12 Dash 3000 4000 Patient Monitor Revision A 2000966 339 Assembly Drawings Theory Of Operation Block Diagram ...
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Страница 279: ...Revision A Dash 3000 4000 Patient Monitor A 1 2000966 339 A Appendix A Electromagnetic Compatibility EMC ...
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