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device under test. The “Offset Current” is the offset current value either specified by
the user or calculated automatically by the Omnia II unit. These two values are used
to calculate the actual displayed leakage current measurement. The instrument then
calculates the vector sum of the offset value and the total value so that the inherit
leakage of the Associated Research, Inc. instruments is excluded from the
measurements.
Line Configuration Soft keys
The LINE configuration is determined by the relays S1, S2 and S3 (see Figure below)
and is set using the corresponding Line Configuration Soft keys. The S1 relay is
represented as NEUTRAL and is controlled by the Neutral soft key. The S2 relay is
represented as REVERSE and is controlled by the Reverse soft key. The S3 relay is
represented as GROUND and is controlled by the Ground soft key. Pressing the
relay’s corresponding soft key will toggle it between its two available states.
Line Configuration Setting
When the Neutral or Ground relays are set to the CLOSED position they are in a
normal operating condition. When the Neutral or Ground relays are set to the OPEN
position they are in a fault condition that represents a fault in the line input wiring.
When the REVERSE relay is set to ON the relay is in position B (refer to Figure
above) and the Line and Neutral conductors are reversed at the DUT power outputs.
The power output is represented as the power receptacle in Figure 2.
The three relays may be configured into eight different combinations of Line
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