GE 5489329, Техническая публикация

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Electrical safety tests
LOGIQ C9 Series – Basic Service Manual 10-25
5482298-100 English Rev. 5
Chassis leakage current test
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.
Figure 10-3. Set Up for Chassis Source Leakage Current, IEC 601-1 Clause 19 -
Continuos Leakage Currents and Patient, Auxiliary Currents
When using the Microguard or a similar test instrument, its
power plug may be inserted into the wall outlet and the
equipment under test is plugged into the receptacle on the panel
of the meter. This places the meter in the grounding conductor
and the current flowing from the case to ground will be indicated
in any of the current ranges. The maximum allowable limit for
chassis source leakage is shown in Table 10-12
on page 10-21 .
DANGER ELECTRIC SHOCK HAZARD. WHEN THE METER'S
GROUND SWITCH IS OPEN, DON'T TOUCH THE
ULTRASOUND SYSTEM!.
CAUTION
Equipment damage possibility. Never switch the Polarity and
the status of Neutral when the Ultrasound system is powered
ON. Be sure to turn the Ultrasound system power OFF before
switching them using the POLARITY switch and/or the
NEUTRAL switch. Otherwise, the Ultrasound system may be
damaged.