Armature Testing
The Manual Coil Test screen is also used when testing DC armatures, and the screen’s features behave in the same
manner. However, rather than testing a physically single coil with only two contacts, armature testing involves
applying the armature testing probe tips sequentially from bar to bar around the commutator. Depending on winding
equalization, a portion or all of the bars can be tested in this manner.
Armature testing involves using special leads and accessories for RLZ and Surge testing.
Armature RLZ Testing
RLZ testing uses the low-voltage probes connected to the RLC adapter on the back of the unit as shown below.
Fig 102:
Armature RLZ testing uses RLC adapter and hand-held probes—smaller probe set shown.
1. Remove the standard lead set from their receptacles and store in their backpack or a clean dry place.
2. Ensure that the RLC test leads are properly connected to the RLC adapter. Connect lead 1 to the lower level and
lead 2 to the upper level.
3. Two options are included with the ADX15A as shown in the image below. The set on the left uses the DLRO
Connect system with pistol-grip spring-loaded probes. They are typically used on medium or larger sized
commutators. The spring-loaded probes on the right are used for smaller devices.
Fig 103:
Armature RLZ testing leads included with the ADX15A.
4. Test leads options are all Kelvin-type leads. Ensure that all four probe tips make proper contact with the armature
bars.
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Megger Baker ADX User Guide
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Manual Tests
Summary of Contents for ADX15
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