GE Dash Port 2, Service Manual

Page: 51 / 108

Revision A Dash Port 2 Docking Station 4-11
2000966-138
Maintenance: Electrical Safety Tests
Enclosure Leakage Current Test
Perform this test to measure current leakage through exposed conductive
surfaces on the device under test during normal operation.
1. Configure the leakage tester like the circuit shown below with GND
switch OPEN and polarity switch NORM.
2. Connect probe to an unpainted, non-anodized chassis ground on the
unit under test (Equipotential lug).
3. Read the current leakage indicated on DMM.
127(
Center-tapped and non-center-tapped supply circuits produce
different leakage currents and the UL and IEC limits are
different.
4. Set the polarity switch to RVS.
5. Read the current leakage indicated on DMM.
127(
If either reading is greater than the appropriate specification
below, the device under test fails. Contact GE Medical Systems
Information Technologies Technical Support.
• 300 µA (0.3 volts on the DMM), and the device under test is
powered from 100-120 V/50-60 Hz
• 300 µA (0.3 volts on the DMM), and 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), and the device under test is
powered from a non-center-tapped, 200-240 V/50-60 Hz, single-
phase circuit
6. Set the GND switch on the leakage tester to CLOSED.
7. Read the current leakage indicated on DMM.
8. Set the polarity switch to RVS.
Power Cord
Leakage Tester
NORM
RVS
HIGH
LOW
GND
1K
0.15µF
10
Power Cord
Device
Under
Test
DMM set to measure AC voltage
GND
DMM
Closed
Open
Probe to exposed conductive chassis