Table 3-5: Enclosure Leakage Current - Mallinckrodt NELLCOR NPB-4000 Service Manual

3.4.2.3 Patient Leakage Current

Table 3-5: Enclosure Leakage Current

AC Line Neutral Line
Wire
Cord
Closed Closed
Closed Closed
Closed Open
Open Closed
Open Open
Open Closed
This test measures patient leakage current in accordance with IEC 601-1, clause
19, for Class I, type CF equipment. Patient leakage current in this test is
measured from any individual patient connection to earth (power ground).
Note: This test requires a test cable for each patient connector. For
example, the ECG test cable consists of the ECG cable
connector, with all conductors shorted together, connected to a
test lead from the electrical safety analyzer. Test cables for SpO
and temperature can be configured in a similar manner, by
wrapping each sensor end individually with aluminum foil filled
with conductive gel (only enough gel to ensure conductivity).
Attach a wire to the foil that is connected to a test lead from the
electrical safety analyzer.
1. Configure the electrical safety analyzer as recommended by the analyzer
operating instructions.
2. Connect the monitor' s AC mains power cord to the analyzer as
recommended by the analyzer operating instructions.
3. Connect the ECG test cable between the ECG connector on the
NPB- 4000/C and the appropriate input connector on the analyzer.
4. Turn on the NPB- 4000/C.
5. Perform the patient leakage current test as recommended by the analyzer
operating instructions.
Note: Patient leakage current is measured under various conditions of the AC
mains and protective earth conductor. For each condition, the measured
leakage current must not exceed that indicated in Table 3-6.
6. Repeat the patient leakage current test for the SpO
connections, using the appropriate test cables.
Section 3: Performance Verification
Power Line
IEC 601-1
Ground
Wire
100 µA
Closed
500 µA
Open
500 µA
Closed
500 µA
Closed
500 µA
Closed
500 µA
Open
and temperature patient
2
AAMI/ANSI
ES1
Standard
100 µA
300 µA
300 µA
100 µA
300 µA
300 µA
2
3-19