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 Uncertainties of better than 0.01 % throughout the loading range.   A spreadsheet template to help figure out CMC's for calibrating machines can be at http://www.mhforce.com/s/CMC-CALCULATIONS-FOR-FORCE-MEASUREMENTS.xlsx

Range of Use - Typically a Morehouse UCM can be used as low as 1 % of full-scale capacity.

Universal Testing Machine

Universal Testing Machine - 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.

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 %.

CMC -  Calibration and Measurement Capability is typically above 1 %.     Note:  A UTM 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.

Range of Use - Varies depending on the manufacturer.

ASTM Measurement Pyramid

Everything we do, we believe in changing how people think about force and torque calibration.  Morehouse believes in thinking differently about force and torque calibration and equipment.  We challenge the "just calibrate it" mentality by educating our customers on what matters, what causes significant errors, and focus on reducing them.  Morehouse makes our products simple to use and user-friendly.  And we happen to make great force equipment and provide unparalleled calibration services.

Wanna do business with a company that focuses on what matters most?  Email us at info@mhforce.com.

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