GE Medical Systems marquette Dash 2000, Service Manual, Page: 67 / 202

Maintenance: Electrical Safety Tests
Revision A DASH 2000 Patient Monitor 3-21
2000 412-001
Ground (Earth) Wire
Leakage Current
Tests Perform this test to measure current leakage through the ground (earth)
wire of the equipment during normal operation.
1. Set the leakage tester switches as follows:
¥ Selector knob Ð 1,
¥ GND switch Ð OPEN,
¥ Polarity switch Ð NORM,
¥ Power switch Ð OFF.
2. Connect the DMM to the METER jacks on the leakage tester. Set the
DMM to measure AC millivolts.
3. Connect the power cord of the device under test to the power
receptacle on the rear of the leakage tester.
NOTE
The device under test is to be tested at its normal
operating voltage.
4. Set the leakage tester power switch to ON.
5. Set the power switch of the device under test to ON.
6. Read the current leakage indicated on DMM. If the reading is
greater than the appropriate specification below, the device under
test fails and should be repaired and tested again.
¥ 300 microamperes (0.3 volts on the DMM), and the device under
test is powered from 100 Ð 120 V / 50 Ð 60 Hz
¥ 300 µA (0.3 volts on the DMM), and the device under test is
powered from a centered-tapped 200 Ð 240 V / 50 Ð 60 Hz, single-
phase circuit
¥ 500 µA (0.5 volts on the DMM), and the device under test is
powered from a non-center-tapped, 200 Ð 240 V / 50 Ð 60 Hz,
single-phase circuit
NOTE
Center-tapped and non-center-tapped circuits produce
different leakage currents and the UL and IEC limits are
different.