Safety Tests; Ground Integrity - Philips M3921A Service Manual

Safety Tests

Ground Integrity

Performance Verification
Philips safety tests meet the standards of, and are performed in accordance
with IEC 601-1, Clause 19 (EN60601-1, Second Edition, 1988; Amendment
1, 1991-11, Amendment 2, 1995-03).
The A1 patient monitor is a Class II device. It is double insulated and does not
require a protective earth (ground) wire. The A3 patient monitor is a Class I
device. It requires a protective earth (ground) wire. Test requirements differ
for Class I and Class II devices. Be aware of the differences and use the
appropriate test procedure for the monitor in use.
There are two categories of safety tests:
Ground Integrity
n
Electrical Leakage
n
Table 6 Ground Integrity
Test or "Inspection" to Perform
Protective Earth
See "Safety Test Diagram - Protective
Earth" on page 30
Expected Test Results
With mains cable:
Maximum impedance = x <= 100 mOhms
Safety Tests
29