Morehouse UCM Guide

ISO/IEC 17025 / ANSI/NCSLI Z540.3 Accredited
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
P: [phone]
F: [phone]
[e-mail]
www.mhforce.com
PM-5201
Rev. 11/2021
Operation and Instruction Manual
Universal Calibrating Machine (UCM)

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 2
Rev. 11/2021
Table of Contents
1.Introducon
1.1 Origin and Use ...........................................................................4
1.2 Funconal Operaon......................................................................4
1.3 Design ..................................................................................5
1.4 Reference Standard .......................................................................5
1.5 Overview ...............................................................................6
2. Descripon
2.1 General .................................................................................7
2.2 Construcon.............................................................................7
2.3 Hydraulic Jack Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Loading Power Supply .....................................................................9
3. Preparaon for Use
3.1 Unpacking..............................................................................13
3.2 Installaon .............................................................................13
3.3 Installaon of a Reference Standard ........................................................14
3.4 Preparing the Hand Pump for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 Preparing the Jack Assembly for Use ........................................................16
4. Operaon
4.1 Operang Condions ....................................................................17
4.2 Compression Setup ......................................................................18
4.3 Tension Setup...........................................................................21
4.4 Hand Pump Operaon....................................................................23
4.5 Universal Hydraulic Pump .................................................................24
4.6 Calibraon .............................................................................24
4.7 Tare Load ..............................................................................25
5. Service, Inspecon, Maintenance, & Lubricaon
5.1 Tools ..................................................................................27
5.2 Service Inspecon .......................................................................27
5.3 Maintenance ...........................................................................27
5.4 Lubricaon .............................................................................28
5.5 Rust Prevenon .........................................................................28

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 3
Rev. 11/2021
Table of Contents
6. Disassembly, Repair, and Reassembly
6.1 Disassembly and Reassembly ..............................................................29
6.2 Air Bleed Procedure for Hydraulic Jack ......................................................29
6.3 Service Instrucons for Hydraulic Hand Pump ................................................30
6.4 Repair .................................................................................30
6.5 Drawings & Parts Lists ....................................................................31
7. Accessories & Adapters for use with Morehouse Universal Calibrang Machines......................34

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

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 5
Rev. 11/2021
1.3 Design
The design of the machine has one purpose, ulmate accuracy. The force produced by the calibrang machine
is transferred directly to the unit under test without any machine loss or mechanical interference. Fricon
between the reference standard and the unit under test has been eliminated. This is essenal because even
slight fricon, which is inherent in other types of calibrang machines, frequently results in gross inaccuracies.
Non-axial loading, another factor contribung to inaccurate calibraon, is also eliminated by the design of the
machine and its accessories.
1.4 Reference Standard
While a reference standard, such as a load cell, is essenal to the funcon of calibraon, it is not supplied as
part of the Universal Calibrang Machine. Only compression reference standards need to be purchased for use
with the machine because whether performing a tension or compression calibraon, the reference standard
is always loaded in compression. Since compression reference standards are less expensive than dual mode
tension and compression type standards, the cost of reference standards for use with a Morehouse Universal
Calibrang Machines is less than for other types of machines.
Figure 2: Morehouse Ultra-Precision Load Cell

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 6
Rev. 11/2021
Figure 3: Morehouse Universal Calibrating Machine 100,000 lbf (500 kN) Capacity
(with motorized adjustable yoke platen)
1.5 Overview
This manual contains instrucons for the installaon, operaon, service, and roune maintenance of all More-
house Universal Calibrang Machines, regardless of capacity. If there are any quesons about the use or main-
tenance of the calibrang machine, please contact us.
Hand Pump Assembly
Stationary Frame Assembly
Adjustable Foot
Hydraulic Jack Assembly
Motorized Positioning Mechanism
Moveable Yoke Assembly
Lower Yoke Platen
Upper Yoke Platen
Drive Mechanism Housing
Tension Tie Bar
Tie Bar Locking Collar
Upper Machine Platen
Reference Standard Load Cell
Set Screw
Lower Machine Platen
Momentary Positioning Switch
Hydraulic Screw Pump
Unit Under Test in Tension

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 7
Rev. 11/2021
2.1 General
The Morehouse Universal Calibrang Machine is comprised of three principal assemblies, which are described
in this secon:
1- Loading Frame
2- Hydraulic Jack
3- Loading Power Supply
2.2 Construcon
Overall construcon of the calibrang machine is illustrated by the outline drawing shown in Figure 4. Dimen-
sions are indicated for the various standard capacity machines in Table 1 and 2.
2. Descripon

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 8
Rev. 11/2021
1 Model designaons xy are dened as:
• x = M for manual or A for automated
• y = D for domesc or E for export
2 Referenced dimensions are congured with the use of Morehouse load cells as the standards.
“A”
Max
Height
“L Max”
“L Min”
Compression
Area
Travel
Adjustment
“M Max”
“M Min”
Tension Area
Travel Adjustment
Capacity
required
(lbf)
Model
designation1
Max
capacity
A L Max2L Min2M Max2M Min2Size
10,000 UCM-11xy-01 11,500 TBD TBD TBD TBD TBD Standard
10,000 UCM-11xy-02 11,500 48.0 13.5 2.0 12.5 1.5 Compact
30,000 UCM-30xy-01 30,000 96.0 22.0 3.0 43.5 24.5 Standard
30,000 UCM-30xy-02 30,000 75.0 22.0 3.0 22.5 3.0 Compact
60,000 UCM-60xy-01 60,000 105.0 22.5 3.0 46.0 26.5 Standard
60,000 UCM-60xy-02 60,000 81.0 23.5 3.0 22.5 2.0 Compact
100,000 UCM-112xy-01 112,500 112.5 24.0 3.0 46.5 25.5 Standard
100,000 UCM-112xy-02 112,500 92.0 24.5 3.0 26.5 5.0 Compact
200,000 UCM-225xy-01 225,000 120.0 28.5 7.0 36.5 14.5 Standard
300,000 UCM-338xy-01 338,000 132.0 29.5 8.0 41.5 19.5 Standard
500,000 UCM-675xy-01 675,000 158.0 34.5 10.0 50.5 26.0 Standard
600,000 UCM-675xy-01 675,000 158.0 34.5 10.0 50.5 26.0 Standard
1,000,000 UCM-1125xy-01 1,125,000 192.5 40.0 11.0 54.0 25.0 Standard
Table 1: UCM lbf Dimensions (inches)
Figure 4: UCM Dimensions
Capacity
required
(kN)
Model
designation1
Max
capacity
A L Max2L Min2M Max2M Min2Size
50 UCM-11xy-01 50 TBD TBD TBD TBD TBD Standard
50 UCM-11xy-02 50 1 220 340 50 320 30 Compact
100 UCM-30xy-01 133 2 440 570 80 1 110 620 Standard
100 UCM-30xy-02 133 1 900 570 80 570 80 Compact
250 UCM-60xy-01 266 2 670 580 80 1 160 670 Standard
250 UCM-60xy-02 266 2 060 600 80 570 50 Compact
500 UCM-112xy-01 500 2 860 610 80 1 180 650 Standard
500 UCM-112xy-02 500 2 340 620 80 670 130 Compact
1 000 UCM-225xy-01 1 000 3 040 720 170 920 370 Standard
1 500 UCM-338xy-01 1 500 3 360 750 200 1 050 500 Standard
3 000 UCM-675xy-01 3 000 4 010 880 260 1 280 660 Standard
5 000 UCM-1125xy-01 5 000 4 870 1 020 280 1 370 630 Standard
Table 2: UCM kN Dimensions (mm)
Technical Specicaons

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 9
Rev. 11/2021
The Universal Calibrang Machine consists primarily of two load bearing frames:
Moveable Yoke Assembly
Two tension e bars connect the upper and lower yoke platens. The lower yoke platen is permanently xed in
posion by means of the set screws and tension collar nuts. An aperture in the center of the lower yoke platen
provides for inseron of either an alignment adapter or a tension member (pulling rod). When posioning the
moveable yoke assembly, the e bar locking collars are used to support it on the upper machine platen. The
upper yoke is adjustable to accommodate various calibraon conguraons, and to minimize necessary jack
travel. A motorized posioning mechanism for the upper yoke is standard on all capacity Universal Calibrang
Machines.
Staonary Frame Assembly
The staonary frame assembly consists chiey of two platens connected by e bars. Adjustable feet, together
with a circular level mounted on the lower machine platen, provide the means for leveling the machine. Con-
strucon of the staonary frame assembly assures an extremely rigid support with negligible machine deec-
on, even at capacity load.
2.3 Hydraulic Jack Assembly
The Morehouse hydraulic jack assembly (Figure 5) is specially designed and constructed to be suitable to
perform precise calibraon work. The jack is aached to the top of the upper machine platen to maintain the
vercal axis of the jack precisely in line with that of the calibraon standard and test instrument. Ram travel of
this jack is 1” (25.4 mm) maximum. Hydraulic pressure at capacity load is approximately 4,500 psi (31 026 kPa).
2.4 Loading Power Supply
A hydraulic power system is required to supply, maintain, and adjust the hydraulic uid pressure in a UCM
hydraulic jack in order to provide various calibraon loads. Morehouse provides three oponal hydraulic power
systems for all UCM models based on the needs and condions provided by the user:
1- Hydraulic Hand Pump
2- Universal Hydraulic Pump (UHP)
3- Auxiliary Hydraulic Screw Pump

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 10
Rev. 11/2021
Figure 5: Hydraulic Hand Pump Assembly Connected to Jack Assembly
Ram Vernier Piston
High/Low Selector
Drip Pan
Relief Valve
Quick-Disconnect Coupling
High-Pressure Hose
Air Bleed Plug
Hydraulic Hand Pump
The basic and low-cost system to provide hydraulic pressure for a UCM is a Morehouse hand pump (Figure 5).
When this system is purchased with a UCM, the hydraulic jack is acvated by a hand pump assembly that ad-
vances the ram quickly, then more slowly unl the desired load is achieved. The high/low operaon is switched
manually, and can be switched at any desired load. The pump is connected to the hydraulic jack by means of a
hydraulic hose assembly with a quick-disconnect coupling.
Cauon: Before use, check the hose and ngs for any potenal leaks.