ES601Plus OPERATING MANUAL
Fig u re 37 - Switch DUT to "ON" for upcoming SF:L2O tests.
Note the purpose of the "STOP BEFORE..." break is to allow you to accommodate power-sensitive
equipment, such as a personal computer or equivalent DUT, which cannot be arbitrarily
disconnected from the AC supply without potentially damaging the DUT. This type of equipment is
much less common than equipment that can be switched "OFF" at any time. The more typical
setting of "STOP BEFORE..." is therefore "NO", in which case the BREAK menus of Fig u re 36
and Fig ure 37 will not be displayed.
Many types of medical equipment do not fully disconnect from the AC supply when the power
switch is set to "OFF". Even when "OFF", this type of equipment remains effectively connected to
the AC supply and continues to operate in a standby state, for example, by charging an internal
battery. For this type of equipment, "DUT OFF" leakage tests are required under IEC60601 and
AAMI-ES1 standards.
"DUT OFF" leakage measurements are optionally enabled by the user before the test is performed,
by means of the leakage setup menu. If "DUT OFF" tests are enabled, ES601Plus will stop after all
leakage measurements have been completed with DUT power switch in "ON" position. ES601Plus
will then display instructions as shown in the following figure.
Manual Testing/Chapter 5 # Page 78
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