The minus sign that became a diagnosis
Fictional RPM-1 DC motor desk file, M1 drawing M1 revision1. Supplied virtual records only. All values are fictional problem data; no equipment operation.
Customer says: The note says minus 0.50 volts, so the motor must be running backward.
The note includes lead positions but no recorded direction observation. Interpret the measurements before proposing a repair.
Tests you can run
- Read the original meter setup and condition
- Read the complete original endpoint map
- Read the separately supplied across-load record
- Read the same-run terminal potentials
- Read the observation field
- Read the reversed feed-pair record