Morehouse PCM2K-2 User manual

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
PG-5401
Rev. 4/2021
Product Guide
Portable Calibrating Machine

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 2
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Table of Contents
Descripon .................................................................................. 3
Standard Parts................................................................................ 4
Standard Reference Load Cell ................................................................... 5
Portable Calibrang Machine Models............................................................. 6
Compression Adapters ......................................................................... 7
Tension Adapter Kit ........................................................................... 8
Hand-held Force Gauge L-Bracket Adapters ....................................................... 10
Weight Hanging Kit for L-Bracket................................................................ 14

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 3
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
The Morehouse Portable Calibrang Machine (PCM) was designed and manufactured to address issues associ-
ated with calibrang small force measurement instruments. The machine is highly versale in accommodang
a large variety of conguraons to which force measurement instruments are made at lower capacies (under
2,000 lbf).
Using proper adapters, several types of force instruments such as shear-web load cells, S-type load cells, beam
load cells, buon load cells, ring force gauges, hand held force gauges, and small dynamometers can be cali-
brated in a Portable Calibrang Machine. Features of the versale calibraon system are:
• Capable of force calibraon in both compression and tension
• Portable design; machine weighs 32 lbs and is placed in a case with accessories
• Calibrates force instruments up to 2,000 lbf
• Exceponal force control capability to reach and maintain target test forces (e.g. 0.01 lbf using a 1,000 lbf
Morehouse Ultra-Precision Shear Web load cell)
• Safe and condent calibraon procedure for small instruments, which lowers risk of overloading the instru-
ments
• Built-in swiveling coupling nut to accommodate a variety of adapters and instruments
• Compression bearing pad and ball seat adapter are included for calibrang compression-only instruments
When small force instruments are calibrated in large calibrang machines with high capacies, there is a high
risk of overloading the unit under test. The Portable Calibrang Machine lowers this risk by providing the user
high controllability over the applied force.
This guide describes dierent Portable Calibrang Machine models as well as the accessories and adapters
available for the machine to calibrate various types of instruments. For detailed informaon on the machine
operaon and maintenance, refer to the Operaon and Instrucon Manual for the Portable Calibrang Ma-
chine, which is available at www.mhforce.com.
Descripon

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 4
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Figure 1: Components of Portable Calibrating Machine
Control Spring Housing
Quick-Adjust Latch
Guide Post
Reference Standard Load Cell
Standard Load Cell Mounting Adapter
Compression Bearing Pad
Ball Seat Adapter
Mechanical Jack
Coupling Nut
Figure 1 illustrates the main components of a Portable Calibrang Machine. All Portable Calibrang Machines
are supplied with:
1. Main loading frame and mechanical jack
2. Standard load cell mounng adapter
3. Compression bearing pad
4. Ball seat adapter
5. Swiveling coupling nut
6. Case with custom-cut foam
Standard Parts

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 5
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
The Portable Calibrang Machine uses a high accura-
cy load cell as the reference to measure the applied
force to the instrument under test. The reference
standard load cell is mounted to the top of the me-
chanical jack through the standard mounng adapter.
The mounng adapter transfers force to the load cell
through the boom shoulder of the load cell and
ensures that the standard load cell is loaded in the
same manner that it was calibrated.
Morehouse recommends that a Morehouse Ul-
tra-Precision Shear Web load cell is used as the
reference standard in a Portable Calibrang Machine.
The standard mounng adapter is designed to mount
a Morehouse Shear Web load cell as the reference
standard into the Portable Calibrang Machine.
However, other types of cells can be installed in the
machine using a custom adapter.
To generate a quality calibraon standard, the refer-
ence standard load cell must be used in conjuncon
with a high accuracy electronic indicator such as
Morehouse 4215 indicator or High Accuracy Digital
Indicator (HADI).
Standard Reference Load Cell
Figure 2: Ultra-Precision
Shear Web Load Cell
Figure 3: 4215 Indicator Figure 4: HADI Indicator

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 6
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Portable Calibrang Machine Models
The Portable Calibrang Machine is oered in various models with dierent sizes to address dierent users cal-
ibraon requirements. Figure 5 and Table 1 contain specicaons for the standard models. Contact Morehouse
if you need addional features or dierent sizes for the Portable Calibrang Machine.
Figure 5: Dimensions Guide for Various PCM2K Machine Models
Model Swiveling Coupling Nut Thread Reference Load Cell Mounting Threaded
Adapter
Length
(See Figure 2)
PCM2K-2 1.125”-12 UNF-2B 0.625”-18 UNF-2A 29.5 in
PCM2K-4 1.125”-12 UNF-2B 0.250”-28 UNF-2A 29.5 in
Table 1: Portable Calibrating Machine Standard Models

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 7
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Compression Adapters
A set of compression calibraon adapters is required to perform compressive force calibraon on force trans-
ducers in a Portable Calibrang Machine. The set consists of two parts:
• Compression bearing pad
• Ball seat adapter
These adapters are included with all Portable Calibrang Machines unless otherwise specied by the user. The
compression bearing pad is threaded directly on top of the reference standard load cell. The alignment hole at
the center of the compression bearing pad helps align the instrument under test. To use this feature, a set of
Morehouse alignment plug adapters must be mounted to the boom part of the instrument. The alignment
plug adapter ts into the alignment hole to ensure that the reference standard load cell and unit under test
experience the same loading line. The ball seat adapter is threaded into the swiveling coupling nut, and has a
ball seat machined on the surface to accommodate load balls or loading studs with a spherical surface.
Figure 6: Calibration Setup with Compression Calibration Adapters
Ball Seat Adapter
Compression Bearing Pad
Reference Standard Load Cell
Unit Under Test
Swiveling Coupling Nut

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 8
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Tension Adapter Kit
Tension force calibraon oen requires proper adapters to install the force instrument into the calibrang ma-
chine. Morehouse oers a tension adapter kit for the Portable Calibrang Machine to help with tension force
calibraon setups.
The kit includes threaded adapters, which are used to mount the unit under test between the reference stan-
dard and the stage beam of Portable Calibrang Machine. Two adapters are typically needed for a tension
setup. One adapter is used to mount the unit under test on top of the reference standard. Another adapter es
the top of the unit under test to the coupling nut of the stage beam. The swiveling acon of the coupling nut
makes it easy for the user to install the adapters.
Tension Adapter
( Top)
Tension Adapter
(Bottom)
Reference Standard Load Cell
Unit Under Test
Swiveling Coupling Nut
Figure 7: Tension Setup with the Tension Adapter Kit

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 9
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
The kit includes the common thread sizes for most force instruments available in the market within the 2,000
lbf capacity range. Table 2 shows the thread sizes included in the standard Tension Adapter Kit. Other thread
sizes can be manufactured by Morehouse per the users request. This Tension Adapter Kit is designed to be
compable with Morehouse shear web load cells. If another type of load cell is used as the reference standard
in a Portable Calibrang Machine, consult Morehouse before placing an order for this kit.
Figure 8: Tension Adapter Kit for a Portable Calibrating Machine
UUT Side Thread Max Capacity (lbf) Qty. Machine Side Thread
0.25-28 UNF-2B 1800 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.25-28 UNF-2B 1800 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.500-13 UNC-2B 7000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.500-13 UNC-2B 7000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.500-20 UNF-2B 8000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.500-20 UNF-2B 8000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.625-18 UNF-2B 12000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.625-18 UNF-2B 12000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.25-28 UNF-2A 1800 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.25-28 UNF-2A 1800 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.500-13 UNC-2A 7000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.500-13 UNC-2A 7000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.500-20 UNF-2A 8000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.500-20 UNF-2A 8000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
0.625-18 UNF-2A 12000 1 0.625-18 UNF-2B to install on Morehouse Shear Web Standard
0.625-18 UNF-2A 12000 1 1.125-12 UNC-2A to install into the swiveling coupling nut
Table 2: Tension Adapter Kit Components

Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: [phone]
www.mhforce.com
Page 10
Rev. 4/2021
Portable Calibrang
Machine Guide
(PG-5401)
Hand-held Force Gauge L-Bracket Adapters
Calibrang hand-held force gauges in regular calibrat-
ing machines can be cumbersome and involves a risk
of overloading the gauge. Hand-held force gauges are
normally manufactured for measuring small forces,
which are dicult to generate and maintain in a large
force calibrang machine. A small, sudden increment
in the applied force can result in overloading the
instrument under test and reference standard. Such
incidents can be costly and cause long down mes.
The Portable Calibrang Machine addresses this issue
by providing a highly precise force control and elimi-
nang sudden increments in applied force.
Morehouse oers a set of L-Bracket adapters to
calibrate hand-held force gauges in a Portable Cali-
brang Machine. The L-Brackets consist of a number
of back-plates, boom-plates, and treaded adapters
to mount various models of hand-held force gauges.
Each back-plate can be mounted to any boom-plate
to make dierent combinaons. Each back-plate is
designed with special hole paerns to accommodate
various types of hand-held force gauges.
The force gauge is mounted to the back-plate
through the hole paern and the back-plate is di-
rectly mounted to the boom-plate. Boom-plates
have a threaded hole at the center with 0.625”-18
UNF-2B thread which is used to install the L-Bracket
and hand-held force gauge assembly directly to the
reference standard load cell in a Portable Calibrang
Machine. Boom-plates are included with various
mounng hole osets from the edge. Based on the
type of hand-held force gauge, the proper boom
plate must be used to ensure the line of applying
force in the calibraon set up aligns with the force
gauge’s load line. A threaded adapter is ulized to
aach the loading rod of the hand-held force gauge
to the coupling nut in a Portable Calibrang Machine.
Figure 9: Calibration Setup for a Hand-held
Digital Force Gauge Using a L-Bracket