Morehouse UCM Leitfaden

ISO/IEC 17025 / ANSI/NCSLI Z540.3 Accredited

Morehouse Instrument Company, Inc.

1742 Sixth Ave., York, PA 17403-2675 USA

P: (717) 843-0081

F: (717) 846-4193

info@mhforce.com

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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: (717) 843-0081

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.

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