Major tech MT935 Manuel d'instruction - Page 3
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3.
Connect the test probes to the three main phases. Press the ON/OFF
button. The green ON indicator shows that the instrument is ready for
testing. Either the clockwise or counter clockwise rotary indicator
illuminates showing the type of rotary field direction present.
4.
The rotary indicator lights even if the neutral conductor, N, is connected
instead of the test lead input jacks. Refer to Figure 2 (also shown on the
back of the motor and phase rotation indicator) for more information.
Figure 2. Phase Indication Table (shown on the rear of the Motor
and Phase Rotation Meter)
Non-Contact Rotary Field Indication
For non-contact rotary field indication:
1.
Disconnect all test leads from the Motor and Phase Rotation Meter.
2.
Position the meter on the motor so that it is parallel to the length of the
motor shaft. The meter should be one inch or close to the motor. See
Figure 3.
3.
Press the ON/OFF button. The green ON indicator shows that the
instrument is ready for testing. Either the clockwise or counter clockwise
rotary indicator illuminates showing the type of rotary field direction
present.
Note:
The indicator will not operate with engines controlled by frequency
converters. The bottom of the Motor and Phase Rotation meter should be
oriented towards the drive shaft. See the orientation symbol on the Motor
and Phase Rotation meter
Figure 3. Motor Rotation