Universal Calibrating Machines Versus Universal Testing Machines - These Machines are Different
Morehouse UCM
Universal Calibrating Machine - a versatile compression and tension machine used for the calibration of load cells, force gauges, crane scales, and other force measuring instruments for the purpose of calibrating or characterizing the devices for use as secondary standards, working standards or to make field measurements.
Accuracy - The machine matches the accuracy of the calibration standard with which it is used. Most machines are aligned well enough that the maximum amount of side load is less than 0.0625 inches. On a shear web load cell this amounts to a possible error source of 0.003 %.
CMC - Calibration and Measurement capability is typically 0.02 % or better. A Morehouse UCM with two to three load cell standards is capable of achieving CMC Uncertainty of better than 0.01 % throughout the loading range.
Range of Use - Typically a Morehouse UCM can be used as low as 1 % of full-scale capacity.
Universal Testing Machines - Example
Universal Testing Machines - also known as a universal tester, materials testing machine, or materials test frame, is used to test the tensile strength and compressive strength of materials.
Universal testing machines Accuracy - Most machines are between 0.3 % through 1 %. Errors of less than 0.5 % are not uncommon. Very few labs can calibrate with devices sufficiently more accurate than 0.25 %.
Universal testing machine's CMC - Calibration and Measurement Capability is typically above 1 %. Note: Universal testing machines may be used as a means to apply a force if a well-defined reference standard, calibrated by primary standards is used in combination with the load cell in the frame (for control only), a CMC of 0.05 % may be achievable.
Universal testing machines Range of Use - Varies depending on the manufacturer.
| ASTM Measurement Pyramid |
Universal Calibrating Machines versus Universal Testing Machines - Conclusion
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#Universal Testing Machines
