Ground (Earth) Wire Leakage Current Tests - GE Medical Systems Solar 9500 Service Manual

Ground (Earth) Wire Leakage Current Tests

Revision A
Maintenance: Electrical Safety Tests
Perform this test to measure current leakage through the ground (earth)
wire of the equipment during normal operation.
1. Configure the leakage tester like the circuit shown below.
Leakage Tester
HIGH
LOW
GND
1K
DMM
DMM set to measure AC voltage
2. Connect the power cord of the device under test to the power
receptacle on the leakage tester.
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The device under test is to be tested at its normal operating
voltage.
3. Set the power switch of the device under test to ON.
4. Read the current leakage indicated on DMM.
5. Set the polarity switch on the leakage tester to RVS (reverse).
6. Read the current leakage indicated on DMM.
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If either reading is greater than the appropriate specification
below, the device under test fails. Contact GE Medical Systems
Information Technologies Technical Support.
‹
300 microamperes (0.3 volts on the DMM), when the device
under test is powered from 100-120 V/50-60 Hz
‹
300 µA (0.3 volts on the DMM), when the device under test is
powered from a centered-tapped 200-240 V/50-60 Hz, single
phase circuit
‹
500 µA (0.5 volts on the DMM), when the device under test is
powered from a non-center-tapped, 200-240 V/50-60 Hz, single-
phase circuit
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Center-tapped and non-center-tapped supply circuits produce
different leakage currents and the UL and IEC limits are
different.
7. Set the power switch of the device under test to OFF.
Solar 9500 Information Monitor
2001085-061
NORM
GND
RVS
0.15µF
10
Power Cord
Device
Under
Test
073A
6-13