Chapter 7
7-24
BiPAP Focus Ventilator Service Manual © Respironics, Inc.
REF 1029568 Rev B
Testing, Calibration, and Performance Verification
7.7 Electrical Safety
Test
The electrical safety test verifies that the forward and reverse leakage current
are within specified limits.
Required equipment:
•
Electrical safety analyzer
NOTE:
During this test the neutral switch should be closed, not open.
IAW IEC 60601-1 test procedures.
Follow these steps:
1. To connect to ventilator ground, connect the electrical safety analyzer
to serial port shell on the ventilator back panel (Figure 7-26).
Figure 7-26: Serial Communications Port
1. Attach the test orifice to the gas outlet port, and turn the ventilator on
and to begin gas delivery.
2. Check that forward and reverse leakage current is:
< 300 uA for ventilators connected to 100-120 VAC
< 500 uA for ventilators connected to 220-240 VAC.
3. The electrical safety test is complete.
NOTE:
Ground impedance testing (25 A for US and Europe, 40 A for Canada) is
not applicable to the BiPAP Focus ventilator system. The earth
connection from the rear panel of the ventilator is a functional earth for
EMC purposes only. The Protective Earth system is within the power
supply unit as it has no conductive exposed parts. The accessible
functional earth is allowed by IEC 60601-1 because the BiPAP Focus
meets enclosure leakage and separation requirements.
It should be noted that the ground impedance test per IEC 601 is a type
test and not a production line or routine safety test. Respironics
recommends against testing Ground Impedance since it would require
opening the power supply. The functional earth from the ventilator should
be checked by continuity testing (ohmmeter or battery/buzzer) to assure
the ground is intact. The shield of the power supply output cable provides
the EMC ground connection to the protective earth conductor inside of
the power supply unit.
