Vanguard ATRT-01 S2 - Manual (Page 34)

ATRT-01 S2, ATRT-01B S2, AND ATRT-01D S2 USER’S MANUAL REV 2
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Please see Figure 11 below for a description of the test results elements.
Figure 11. Test Results Elements
NOTE
In order for a test to pass, the error reading must be less than or equal to
0.5% and the winding must be in-phase (+).