Lincoln Electric Ranger 305D Service Manual page 95

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ROTOR RESISTANCE AND GROUND TEST (DYNAMIC)
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid elec-
trical shock, please observe all safety notes and precautions detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshoot-
ing assistance before you proceed. Call 1-888-935-3877.
DESCRIPTION
This test checks for faults in the rotor winding, while these windings are being stressed by the
mechanical forces encountered during normal operation.
MATERIALS NEEDED
Miscellaneous hand tools
Ohmmeter Analog type meter required for dynamic resistance test.)
Wiring Diagram
Note: This test is best performed with a good quality analog type ohmmeter. Many digital
meters will not provide stable or accurate Resistance readings while the rotor is spinning.
TROUBLESHOOTING & REPAIR
All manuals and user guides at all-guides.com
(Also referred to as flying resistance test)
WARNING
RANGER 305D
F-41