GE Medical Systems marquette Dash 2000, Service Manual, Page: 71 / 202

Maintenance: Electrical Safety Tests
Revision A DASH 2000 Patient Monitor 3-25
2000 412-001
Patient (Source)
Leakage Current Test This procedure only applies to Class I (grounded/earthed) equipment,
and measures the leakage current from the ECG/RESP connector of the
device to ground.
1. Set leakage tester switches as follows:
¥ Selector knob Ð 3,
¥ GND switch Ð GND OPEN,
¥ Polarity switch Ð NORM,
¥ Power switch Ð OFF.
2. Connect a patient cable or ECG test body to the ECG/RESP
connector of the DUT.
3. Connect a short length of cable between the ECG test body installed
in the last step and the jacks on the top of the leakage tester.
4. Set the leakage tester power switch to ON.
5. Read the leakage current indicated on the DMM.
If the reading is greater than 50 µA (0.05 volts on the DMM), the
device under test fails this test and should be repaired and tested
again.
NOTE
The AAMI and IEC single fault condition (ground open)
is 50 µA, whereas the normal condition (ground closed) is
less.
6. Change the leakage tester polarity switch to the RVS position.
7. Read the leakage current indicated on the DMM.
If the reading is greater than 50 µA (0.05 volts on the DMM), the
device under test fails this test and should be repaired and tested
again.
NOTE
The AAMI and IEC single fault condition (ground open)
is 50 µA, whereas the normal condition (ground closed) is
less.