Universal Calibrating Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: (717) 843-0081
www.mhforce.com
Page 4
Rev. 11/2021
1. Introduction
1.1 Origin and Use
Morehouse Universal Calibrating Machines were originally developed to make use of the inherent high accura
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cy of Morehouse Proving Rings to calibrate working load cells. Today, calibrating machines are used extensively
in industrial, government, and military laboratories not only for the calibration of load cells, but for calibrating
force transducers, dynamometers, load rings, force links, and other force measurement devices.
1.2 Functional Operation
The Morehouse Universal Calibrating Machine is a device for simultaneously applying a force to a high accu
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racy calibration reference standard, and the device to be calibrated (unit under test). The force is produced by
a hydraulic jack activated by a manually operated pump, specially designed to perform precise and accurate
calibration work. The calibrating machine is used to calibrate compression type and tension type instruments.
The calibration reference standard is always loaded in compression, even when calibrating an instrument in
tension.
Figure 1: Morehouse Universal Calibrating Machine 1,000,000 lbf Capacity
