-
76 -
|
Page Rigel Medical
62353+
user Manual V1.4
produce the mains potential. Both sources depend on a current limiting resistor which
could cause a significant voltage drop.
Unlike the IEC 60601-1 requirements, the voltage drop caused by the current limiting
resistor
is compensated for
in the IEC 62353 thus potentially resulting in a higher
reading than the typical IEC 60601-1 F-type test. Please refer to the manufacturers
recommendations.
Alternative method
; This method is in fact similar to a dielectric test between the
Applied Part and all mains parts, EUT earth and Enclosure connected together.
The test is performed using a current limited (3.5mA) mains potential sinusoidal 50Hz
signal. (60Hz where this is the mains frequency)
The 1kΩ measuring device (equivalent to that used in the IEC 60601 standard – see
Appendix C) is positioned between the Applied Part and voltage source.
As Live and neutral are shortened, the Device will not be powered and mains reversal is
not applicable.
Due to the Alternative measuring method, the EUT doesn’t require to be positioned
isolated from earth.
The Alternative Method is not suitable for equipment having active circuitry and relies
on incoming mains to fully expose the potential leakage.
The Alternative method is highly repeatable and as such is ideal for trend analysis on
Medical Equipment not including active circuitry.