GE Medical Systems marquette Dash 2000, Service Manual, Page: 77 / 202

Maintenance: Electrical Safety Tests
Revision A DASH 2000 Patient Monitor 3-31
2000 412-001
Patient (Sink)
Leakage Current Test
(Mains Voltage on the
Applied Part)
This procedure only applies to Class I (grounded/earthed) equipment,
and measures the leakage current from a mains voltage source into the
SpO
2
connector.
1. Set the leakage tester switches as follows:
¥ Selector knob Ð 5,
¥ GND switch Ð CLOSED,
¥ Polarity switch Ð NORM.
2. Disconnect the test cable from the leakage tester PATIENT JACKS
(TOP) and reconnect it to the PATN JACK connector on the front
panel of the leakage tester.
WARNING
The following step will cause high voltage (120 VAC to
240 VAC) to appear at the PATN JACK on the leakage
tester. Do not touch the PATN JACK posts or ECG lead
clips during this test as an electrical shock will occur.
3. Set power switch on the leakage tester to ON.
4. Read leakage current indicated on DMM.
If the reading is greater than the appropriate specification below, the
device under test fails this test and should be repaired and tested
again.
¥ 10 µA, (0.01 volts on the DMM) at 120 VAC without the patient
cable.
¥ 20 µA (0.02 volts on the DMM) at 240 VAC without the patient
cable.
NOTE
The 10 and 20 µA limit are based on internal design
standards.
¥ 50 µA (0.05 volts on the DMM) at 120 Ð 240 VAC.
NOTE
The 50 µA limit is common to all standards.
5. Change the leakage tester polarity switch to the RVS position.