Emerson Epsilon Eb Series Reference Manual page 150

Figure 83: Oscilloscope Connections
CCW Reference Rotation
Before reading the motor signals, zero the V
graduation marker to allow more accurate readings.
Couple the drill motor to the motor shaft. While spinning the motor counter-clockwise, use
an oscilloscope to examine the phase relationship between encoder channel U and positive
peak of V (the voltage at motor power terminal T with reference to S).
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Use the figure below to determine the electrical angle at which the rising edge of U occurs.
This is the Motor Encoder U Angle. Note that with a CCW reference rotation the positive
peak of V is at zero electrical degrees and the electrical angle decreases from left to right.
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User Defined Motors
oscilloscope channel on a horizontal
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