Intercomparison procedures for gage blocks using electromechanical comparators
Abstract
The widely used procedures for calibrating gage blocks by comparison with blocks of known length generally lack the redundancy needed to evaluate measurement uncertainty or the controls needed to monitor the process on a continuing basis. A detailed description is given for the systematized intercomparison of groups of four nominally equal gage blocks using an electromechanical comparator. Two of the blocks are unknowns and two are standards. The process provides the redundancy needed for evaluating uncertainty and for continuous monitoring. Gage block thermal effects, equalization time, handling techniques, and observation sequence are described.
- Publication:
-
Final Report National Bureau of Standards
- Pub Date:
- January 1976
- Bibcode:
- 1976nbs..reptS....B
- Keywords:
-
- Comparators;
- Comparison;
- Electromechanical Devices;
- Calibrating;
- Mechanical Engineering;
- Instrumentation and Photography