GE MEDICAL SYSTEMS
2127661
LOGIQ 400 SERVICE MANUAL
7–9 PERIODIC MAINTENANCE
REV 5
7–3–3 Chassis Leakage Current Test
Definition
Leakage current is the electrical current that could flow through the patient or sonographer should a ground wire break.
The unit, the probes, the ECG module, and all external peripherals must be tested.
Generic Procedure
The test verifies the isolation of the power line from the chassis. The testing meter is connected from accessible metal
parts of the case to ground. Measurements should be made with the unit ON and OFF, with the power line polarity
Normal and Reversed. Record the highest reading of current.
POWER
OUTLET
H (BLACK)
POLARITY REVERSING
SWITCH
MOMENTARY SWITCH
N (WHITE)
G (GREEN)
LEAKAGE
TEST
METER
ACCESSIBLE
METAL
PARTS
CONSOLE
SETUP FOR CHASSIS SOURCE LEAKAGE CURRENT
ILLUSTRATION 7–5
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