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 18
Rev. 11/2021
4.2 Compression Setup
The Morehouse Universal Calibrating Machine is setup for compression calibration in two steps:
1. Positioning the reference standard, such as a Morehouse Proving Ring or Morehouse Load Cell
2. Positioning the unit under test
Prior to use, the machine should be set on a solid surface and leveled by adjusting the feet. Selecting a location
where an even temperature prevails will facilitate the calibration.
Operate the hand pump to extend the ram of the hydraulic jack approximately 1/16 to 1/8 inch before making
the calibration setup. Verify that the upper yoke platen is positioned so that there is sufficient space between
the hydraulic jack and the upper machine platen to insert the reference standard with several inches of thread
on the yoke tie bars remaining above the upper yoke platen. Be sure to include an allowance for the height of
any accessories or adapters to be used with the reference standard.
If sufficient space cannot be obtained, then adjust the upper yoke platen as follows:
Note: When adjusting the upper yoke platen be careful not to run it against the shoulders or the stops on the
tension tie bars as this may damage the calibrating machine.
a) By means of the motor control, lower the upper yoke platen until it rests on the hydraulic jack.
b) Continue to operate the yoke adjusting mechanism until the lower surface of the upper yoke platen is within
1/8 inch of the shoulders of the tension tie bars.
c) Loosen the screws on the tie bar locking collars, lower the locking collars onto the upper machine platen,
and tighten the screws firmly.
d) By means of the motor control, raise the upper yoke platen sufficiently to accommodate the reference stan
-
dard plus any accessories or adapters that will be used with it.
Once the yoke has been positioned to accommodate the reference standard, place the reference standard
on the ram of the hydraulic jack. It is advisable to use an adapter to properly align and secure the reference
standard (Figure 11, A) on the jack ram (Figure 11, C). A complete list of accessories and adapters for use with
Morehouse Universal Calibrating Machines is available at
.
