Philips Avalon CTS M2720A, Service Manual

Page: 57 / 110

Safety Tests 6 Preventive Maintenance and Safety
51
How to Carry Out the Test Blocks
Key to Table 2 P = Pass, F = Fail, X = test result value to be recorded.
Table 2: M2720A: Test and Inspection Matrix
Test Block Test or Inspection to be Performed Expected Test Results
What to Record
on Service
Record (Philips
Personnel only)
Visual Inspect the unit, transducers and cables for
any damage.
Are they free of damage?
If Yes, Visual test is passed. V:P or V:F
Power On Power on the unit.
Does the self-test complete successfully?
If Yes, Power On test is passed. PO:P or PO:F
Performance Perform the parameter test with all parame-
ters as described on page 48.
Do these tests complete without errors?
If Yes, Performance Test is passed. P:P or P:F
Safety (1) Perform Safety Test: Protective Earth. With mains cable:
Maximum impedance = X1
(<= 100 mOhms) S(1):P/X1 or
S(1):F/X1
Safety (2) Perform Safety Test: Enclosure Leakage Cur-
rent - Normal Condition. With mains cable:
Maximum leakage current = X2
(<= 100

A)
S(2):P/X2or
S(2):F/X2
Safety (3) Perform Safety Test: Enclosure Leakage Cur-
rent - Single Fault Condition - Open Supply. With mains cable:
Maximum leakage current = X3
(<= 500

A)
(Note: maximum leakage current in
the US: 300

A)
S(3):P/X3or
S(3):F/X3
Safety (4) Perform Safety Test: Enclosure Leakage Cur-
rent - Single Fault Condition - Open Earth. With mains cable:
Maximum leakage current = X4
(<= 500

A)
(Note: maximum leakage current in
the US: 300

A)
S(4):P/X4or
S(4):F/X4
System Perform the system test according to IEC
60601-1-1, if applicable, after combining
equipment to form a system. See Safety Test (2) and Safety Test
(3) See Safety Test (2)
and Safety Test (3)