Cold and Warm Readings Differ: Thermal Expansion or Magnetostrictive Displacement Sensor Drift
One reading in the morning, another at noon, a third in the afternoon — and range, zero and wiring all check out. When a cold machine and a warm machine read differently at the same mechanical position, there are two sources: the structure itself is expanding as it heats, and the magnetostrictive displacement sensor drifts with temperature. The two differ by an order of magnitude, and confusing them sends you adjusting in the wrong direction. Three field tests separate them.








































































