Table 3-6: Patient Leakage Current Values - Mallinckrodt NELLCOR NPB-4000 Service Manual

Section 3: Performance Verification
3.4.2.4 Patient Leakage Current - (Mains Voltage on the Applied Part)
3-20

Table 3-6: Patient Leakage Current Values

Test Condition
Normal polarity
Normal polarity; Neutral (L2) open
Normal polarity; Earth open
Reverse polarity
Reverse polarity; Neutral (L2) open
Reverse polarity; Earth open
This test measures patient leakage current in accordance with IEC 601-1, clause
19, for Class I, type CF equipment. In this test, 110% of mains voltage is applied
between each patient connection and earth (power ground). Patient leakage
current is then measured from any individual patient connection to earth.
Note: This test requires the same test cables for each patient connector as
described in paragraph 3.4.2.3.
Warning: AC mains voltage will be present on the applied part terminals
during this test. Exercise caution to avoid electrical shock hazard.
1. Configure electrical safety analyzer as recommended by analyzer operating
instructions.
2. Connect monitor' s AC mains power cord to analyzer as recommended by
analyzer operating instructions.
3. Connect ECG test cable between ECG connector on NPB-4000/C and
appropriate input connector on analyzer.
4. Turn on NPB-4000/C.
5. Perform test as recommended by analyzer operating instructions.
Note: Patient leakage current is measured with normal and reverse mains
polarity. For each condition, the measured leakage current must not
exceed that indicated in Table 3-7
6. Repeat test for SpO
test cables.
and temperature patient connections, using appropriate
2
Allowable Leakage
Current (microamps)
10
50
50
10
50
50