GE Medical Systems marquette Dash 2000, Service Manual, Page: 66 / 202

Maintenance: Electrical Safety Tests
3-20 DASH 2000 Patient Monitor Revision A
2000 412-001
Consult your country/local safety agency if in question.
Compliance is checked by the following steps:
1. A current not less than 10A and not exceeding 25 A from a current
source with a frequency of 50 or 60 Hz with a no-load voltage not
exceeding 6 V is passed for at least 5 s through the PROTECTIVE
EARTH TERMINAL or the protective earth pin in the MAINS PLUG
and each ACCESSIBLE METAL PART which could become LIVE in
case of failure in BASIC INSULATION.
2. The voltage drop between the parts described is measured and the
impedance determined from the current and voltage drop. It shall
not exceed the values indicated.
For EQUIPMENT without a POWER SUPPLY CORD the impedance
between the PROTECTIVE EARTH TERMINAL and any ACCESSIBLE
METAL PART which is PROTECTIVELY EARTHED shall not exceed 0.1
ohms
For EQUIPMENT with a POWER SUPPLY CORD the impedance
between the protective earth pin in the MAINS PLUG and any
ACCESSIBLE METAL PART which is PROTECTIVELY EARTHED
shall not exceed 0.2 ohms.
When taking this measurement move the customer's power cord around,
no fluctuations in resistance should be observed.