GE LOGIQ E10, Базовое руководство по обслуживанию

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D
IRECTION
5750007-1EN, R
EV
. 1 LOGIQ E10 B
ASIC
S
ERVICE
M
ANUAL
Chapter 10 Care & Maintenance 10 - 29
Section 10-8
When There’s Too Much Leakage Current...
10-8-1 Chassis Fails
Check the ground on the power cord and plug for continuity.Ensure the ground is not broken, frayed, or
intermittent. Replace any defective part.
Where applicable, tighten all grounds. Ensure star washers are under all ground studs.
Inspect wiring for bad crimps, poor connections, or damage.
Test the wall outlet; verify it is grounded and is free of other wiring abnormalities. Notify the user or
owner to correct any deviations. As a work around, check the other outlets to see if they could be used
instead.
NOTE: No outlet tester can detect the condition where the white neutral wire and the green grounding
wire are reversed. If later tests indicate high leakage currents, this should be suspected as a
possible cause and the outlet wiring should be visually inspected.
10-8-2 Probe Fails
Test another probe to isolate if the fault lies with the probe or the scanner.
NOTE: Each probe will have some amount of leakage, dependent on its design. Small variations in
probe leakage currents are normal from probe to probe. Other variations will result from
differences in line voltage and test lead placement. The maximum allowable leakage current for
body surface contact probe differs from an inter-cavity probe. Be sure to enter the correct probe
type in the appropriate space on the check list.
If excessive leakage current is slot dependent, inspect the Ultrasound system connector for bent pins,
poor connections, and ground continuity.
If the problem remains with the probe, replace the probe.
10-8-3 Peripheral Fails
Tighten all grounds. Ensure star washers are under all ground studs.
Inspect wiring for bad crimps, poor connections, or damage.
10-8-4 Still Fails
If all else fails, begin isolation by removing the probes, external peripherals, then the on board ones,
one at a time while monitoring the leakage current measurement.
Where applicable, in the case of using a UPS (un-interruptible power supply), perform the tests in the
“Electrical Safety tests” section without using the UPS (i.e. directly connect the Ultrasound system to
the AC wall outlet). If this leads to a pass result, the specific UPS must no longer be used.
New Unit
If the leakage current measurement tests fail on a new Ultrasound system and if situation can not be
corrected, submit a Safety Failure Report to document the Ultrasound system problem. Remove
Ultrasound system from operation.