DATREND Systems ES601-US, Operating Manual

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ES601-US OPERATING MANUAL
Manual Testing/Chapter 5
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Page 74
Figure 42 - Switch DUT to "ON" for upcoming "neutral open" tests.
After CONTINUE is pressed, ES601-US will open the Neutral and will then prompt you to reset the DUT
power switch to "ON". This is necessary to satisfy the requirements of the leakage test, but the instruction
can be ignored if the DUT is of the type that cannot be set to "ON" unless a full AC supply is provided.
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
Figure 39
and
Figure 40
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 AAMI-ES1 and IEC60601 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, ES601-US will stop after all leakage
measurements have been completed with DUT power switch in "ON" position. ES601-US will then display
instructions as shown in the following figure.