Test Equipment for Rapid Automatic Check‐out and Evaluation
A. G. Doig · Aircraft Engineering and Aerospace Technology · 1968
ELECTRICAL and electronic equipment in the field has always needed some form of test rig (itself usually electrical) to demonstrate correct operation, or, alternatively, to show where a failure has occurred and to indicate what part to replace or repair. This is fundamental; the effective operation of electrical or electronic systems cannot be measured in terms of visible wear, as in the case of mechanical devices. Early test rigs matched the unsophisticated equipment they were required to test — a dry battery was the earliest stimulus and a small filament lamp the earliest measuring device. From then on the increasing complexity of the tests necessary to validate systems and components required an increasing number of more sophisticated stimuli and measuring devices.