ALL-TEST
PRO
®
31 User Manual
©2011, ALL-TEST
Pro,
LLC
www.alltestpro.com
rev 2011-11F
18
3.
Turn the motor shaft until the highest impedance value is obtained.
4.
Press the ZERO key again.
This sets the reference phase (T1-T3) to “0”. Enter 0 on the Motor
Test Form
5.
Move the Test leads to T2 & T3.
This determines the Impedance Phase Balance or Unbalance
Referenced to (T1-T3).
6.
Turn the shaft slowly until the lowest percentage value is obtained.
(The percentage should be
less than 3% of phase unbalance. A percentage > 5% indicates a fault in the winding and
should be investigated further).
