M4735A Service Manual 2-43
Performance Verification Tests
2
Safety Tests
This section covers tests of the M4735A’s electrical safety. The Philips Safety
Test designation for each test is provided for reference of Philips service
personnel.
Test Notes
z Use the procedures called out by the manufacturer of the safety ana-
lyzer in use.
z Only test at the AC Mains (line) voltage used in the customer’s
facility - there is no need to test both 120 VAC and 240 VAC.
z Test both Normal and Reverse Polarity line connections for each test,
and record the worst case value.
z If a ground reference point is needed for the testing, use the metal nut
on the ECG Out (Sync) connector.
Earth Leakage
Leakage through earth (ground) wire of AC power cord.
1. Normal Condition (both AC line connections intact)
Should be <
300 uA (UL, 120 VAC).
Should be <
500 uA (IEC, 240 VAC)
Record as “aaa”.
2. Single Fault Condition (one AC line connection open)
Should be <
1000 uA.
Record as “bbbb”.
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