Seaward 350 PrimeTest - Manual (Page 87)

PrimeTest 350 Operating Instructions
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Note: In order to perform an Insulation Resistance
measurement correctly, the EUT mains
switch must be in the ON position. If the EUT
mains switch is OFF, only the insulation of
the power cord will be tested, as the test
voltage cannot be applied beyond the mains
switch.
When satisfied that the EUT mains switch is in the ON
position, press the START key to proceed. The display
will now progress to the measurement screen as
shown below.
Note: In Expert Mode the test will begin with the on
screen prompt and START key press.