http://www.forcecal.com/main/forcecaldvda.htm

http://www.digitivity.com/test-measurement-equipment/calibration-equipment/force-calibrators.html

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At Procon we know how important it is for process weighing vessels to be calibrated on a regular basis, but also recognise that carrying this out in practice can be difficult, and at times disruptive. Although as a company we offer a range of recognised calibration methods selected to meet specific customer requirements, on-site operational conditions and locations can limit their use and effectiveness. To overcome these restrictions, we have developed our versatile Procon Force Cal™ calibration technique.

ForceCal is a well-proven, highly cost effective, non- intrusive calibration method that has a minimum affect on the plant process. It can be carried out quickly by a single engineer and is suitable for calibrating vessels from 800 kg up to 50,000 kg in capacity.

A leading industry expert has estimated that over 80% of process vessels in the UK do not have adequate calibration traceability. Inadequately calibrated vessels affect product quality, productivity and above all bottom line profitability. All too often, vessels are calibrated during initial commissioning and then the ongoing process and production schedules, together with the design and vessel location; limit the possibilities of carrying out further adequate calibration on a regular basis. In many cases, not being able to apply a suitable method throughout the measuring range results in partial calibration being carried out in difficult conditions with the obvious poor results.

Conventional methods typically require the vessel to be empty before the calibration is started. The most common methods of applying calibration loads to vessels are based around filling the vessel with a measured quantity of water using a flow meter or applying traceable test weights. Both these techniques require the vessels to be taken out of the production cycle for long periods of time and only enable a single calibration cycle to be carried out.

The flow meter method is a fully intrusive method requiring the availability of an adequate supply of clean water, together with a means of disposal. Not only is the calibration process a lengthy procedure, but in many applications there are no easy means of disposing of the water, which may be contaminated with process product. It is worth remembering that the costs associated with any cleaning and disposal can be significant. Interpreting the results requires corrections for water density and meter characteristics and it is not possible to carry out repeatability or hysteresis checks on the weighing system using this method.

Applying test weights to weighing vessels can be difficult and dangerous. Bringing suitable test weights to site and then applying them to the vessel is an onerous task, especially if the vessels are on the top floor of the plant with limited access. Health and safety requirements and safe working procedures often prevent this method being used. Also in many applications, no facility for applying the weights has been included in the design.

Note: Other methods such as millivolt injection or electronic calibration are inherently unreliable. There are certain companies promoting the “Electronic Calibration” method with claims of traceability to UKAS national standards. The calibration certificates issued by them only provide the traceability of the test equipment used, not the system under test.

FIRST METHOD -PUSH DOWN

The on-site set up and use of the Force Cal “Push Down” method is carried out as follows:

Firstly before entering the work area, the necessary work permits are obtained.

• If required the Force Cal test rig brackets can be fitted whilst the vessel is still in production.
• When the vessel to be calibrated is released from production, all the pipe-work connections to the system should be checked for adequate flexibility.
• Next, checks are made on the load cell mounting kits and clearances to ensure there is no mechanical interference to the load cells.
• Now, having checked with the vessel is empty, the load cell millivolt output is checked and the reading recorded.
• Next, assuming the vessel is empty, a zero calibration is carried out to the system weight Indicator.
• Now the Procon Force Cal Test Rig is (can be) fitted , ensuring no load is applied to the vessel.
• Once this is done, the Force Cal reference weight indicator is zeroed.
• The Force Cal Test Rig is now used to load the system in 10 percent steps to (say) 80 or 90 percent of maximum load. The millivolt and weight reading results are recorded at every step.
• At full load the calibration is adjusted if required.
• Now the Force Cal test rig is let down and the zero point checked.
• If any adjustments have been made, the calibration cycle must be repeated to confirm correct calibration adjustments.
• Finally the test results are entered into the lap-top allowing the calibration certificate to be produced.

SECOND METHOD - LIFT UP

The on-site set up and use of the Force Cal “Lift Up” method is carried out as follows:

Firstly before entering the work area, the necessary work permits are obtained.

• When the vessel is released from production, all the pipe-work connections to the system should be checked for adequate flexibility.
• Next, checks are made on the load cell mounting kits and clearances to ensure there is no mechanical interference to the load cells.
• Now, having checked that the vessel is at least 80 percent full of product, mount the Procon Force Cal test rig kit on the calibration plinths, making sure all the jacks are clear of the active weigh vessel
• Now the Force Cal reference weight indicator is zeroed and t he system weight indicator reading is recorded.
• The Force Cal test rig is now used to remove actual load in 10 percent steps to say 80 percent of maximum load. The millivolt and weight reading results are recorded at every step.
• At full load, any error is recorded before letting down the Force Cal test rig jacks.
• The system weight indicator calibration is now adjusted to match the gain of the Force Cal test rig and the new system weight indicator reading is recorded.
• If any adjustments have been made, the calibration cycle must be repeated to confirm correct calibration adjustments.
• Finally the test results are entered into the lap-top allowing the calibration certificate to be produced.

THIRD METHOD - DUAL OPTION

The on-site set up and use of the Force Cal “Dual Option” method is carried out as follows:

When the vessel is released from production, it is checked to see if it has been left empty or full of product

If the vessel is EMPTY the “Dual Option” test rig brackets are used to carry out the normal “Push Down” calibration procedure.

• If the vessel is FULL, the brackets are used to carry out the normal “Lift Up” calibration procedure
• Meanwhile, if the vessel is left half full you still have the capability of checking the system over the full working range.
• In this situation, the “Lift Up” mode is used to re-verify to zero, whilst the “Push Down” mode is used to re-verify to full capacity.

The special load cells used in ForceCal calibration kits are traceable to UKAS standards and give a calibration accuracy of +/- 0.01%. This means that, in line with ISO 9000 recommendations for calibration, weighing systems can be certified to +/-0.03%. (Three times calibration accuracy).

A typical Calibration Certificate is shown below.

Type A and B uncertainty analysis

COMPANY

SAMPLE

LOAD CELL MANUFACTURER

MOREHOUSE

ENTER

LOAD CELL S/N

P-7768

YOUR

CAPACITY

10000

LBF

CALIBRATION

ASTM E74 Uncertainty for K=2.4

0,237

LBF

INFORMATION

THE LOWEST FORCE AT WHICH THE SECONDARY STANDARD WILL BE USED

500

LBF

IN

PRIMARY FORCE CALIBRATION STANDARD UNCERTAINTY K=1

0,001%

HIGHLIGHTED

PRIMARY ELECTRICAL CALIBRATION STANDARD UNCERTAINTY K=1 (IF APPLICABLE)

COLUMNS

CAL DATE

27/10/2010

CALCULATED VALUES

LOAD CELL UNCERTAINTY IN % FOR FULL SCALE K=2.4

0,00237%

LOAD CELL UNCERTAINTY IN % FOR FULL SCALE K=1

0,00099%

LOAD CELL UNCERTAINTY IN % FOR LOWEST FORCE APPLIED K =2.4

0,04740%

LOAD CELL UNCERTAINTY IN % FOR LOWEST FORCE APPLIED K =1

0,01975%

Type A Uncertainty %

Uncertainty Description

Uncertainty

Distribution

Divisor

Standard Uncertainty

Squared

ASTM E74 Uncertainty % at the lowest calibration force to be used

0,01975%

normal

1

1,98E-04

3,90E-08

Combined Type A Uncertainty

1,98E-04

3,90E-08

Type B Uncertainty %

Uncertainty Description

Uncertainty

Distribution

Divisor

Standard Uncertainty

Squared

PRIMARY FORCE CALIBRATION STANDARD UNCERTAINTY

0,001%

rectangular

1,732

5,77E-06

3,33E-11

PRIMARY ELECTRICAL CALIBRATION STANDARD UNCERTAINTY (IF APPLICABLE)

0,000%

rectangular

1,732

0,00E+00

0,00E+00

STABILITY OF THE SECONDARY FORCE STANDARD OVER TIME

0,005%

rectangular

1,732

2,89E-05

8,33E-10

CREEP ERROR FOUND ON LOAD CELL SPEC SHEET

0,002%

rectangular

1,732

8,66E-06

7,50E-11

MISALIGNMENT ERROR (SEE ASTM E1012) AND/OR SIDE LOAD SENSITIVITY FROM LOAD CELL SPEC SHEET

0,005%

rectangular

1,732

2,89E-05

8,33E-10

DISSEMINATION ERROR (FOR CALIBRATION LABORATORIES)

0,005%

rectangular

1,732

2,89E-05

8,33E-10

TEMPERATURE ERROR +/- FROM LOAD CELL SPEC SHEET

0,0015%

rectangular

1,732

8,66E-06

7,50E-11

Combined Type B Uncertainty

5,18E-05

2,68E-09

The National Metrology Institute of India and A Premier Research Laboratory in the Field of Physical Sciences

Calibration Charges: Force & Hardness

Tue, 04/10/2012 - 15:55 — admin

Calibration Charges: Force and Hardness
Force, Torque & Hardness
Sl.No.	Parameter	Item Type /Group	Item Name	Alias Name	Range	No. of Points for Calibration	Limitation / Condition	Charges per Item Rs.	Additional Charges Rs.	Description for Additional Charges	Remarks, if any
1	Force	Force Proving Instruments	Proving Ring/ Load cell	Integral Ring / Load Column / Dynamometer	Capacity upto 100 kN, As per IS 4169:1988	10 (Compression / Tension Mode)	Compression Pads/Tension Shackles required*	13000	1300	For each additional point	1.5 times for ISO-376-2011 standard.*Rs 1500 extra if NPL pads used.
2	Force	Force Proving Instruments	Proving Ring/ Load cell	Integral Ring / Load Column / Dynamometer	Capacity upto 1000 kN, As per IS 4169:1988	10 (Compression / Tension Mode)	Compression Pads/Tension Shackles required*	24000	2400	For each additional point	1.5 times for ISO-376-2011 standard.*Rs 1500 extra if NPL pads used.
3	Force	Force Proving Instruments	Proving Ring/ Load cell	Integral Ring / Load Column / Dynamometer	Capacity upto 2000 kN, As per IS 4169:1988	10 (Compression mode only)	Compression Pads required	35000	3500	For each additional point
4	Force	Force Proving Instruments	Proving Ring/ Load cell	Integral Ring / Load Column / Dynamometer	Capacity upto 3000 kN, As per IS 4169:1988	10 (Compression mode only)	Compression Pads required	50000	5000	For each additional point
5	Force	Force Calibrators	Force Calibration machines	Deadweight,hydraulic multiplication, Comparator Force machine	upto 100 kN	10(per range 10% to 100%)	Site Calibration	42000	2100	For each additional point
6	Force	Force Calibrators	Force Calibration machines	Deadweight,hydraulic multiplication, Comparator Force machine	upto 1000 kN	10 (per range 10% to 100%)	Site Calibration	72000	7200	For each additional point
7	Force	Testing Machines	Universal Testing Machine (UTM)	Compression Testing Machine (CTM) or Tension Testing Machine (TTM)	upto 100 kN	One Scale	Site Calibration	27500	5500	For each additional scale	On request only
8	Force	Testing Machines	Compression Testing Machine (CTM)	Universal Testing Machine (UTM) (Compression Only)	upto 250 kN	One Scale	Site Calibration	38500	7700	For each additional scale	On request only
9	Force	Testing Machines	Compression Testing Machine (CTM)	Universal Testing Machine (UTM) (Compression Only)	upto 1000 kN	One Scale	Site Calibration	48000	4800	For each additional scale	On request only
10	Force	Testing Machines	Compression Testing Machine (CTM)	Universal Testing Machine (UTM) (Compression Only)	upto 3000 kN	One Scale	Site Calibration	63000	6300	For each additional scale	On request only
11	Torque	Torque Measuring Devices	Torque Meter	Torque Tester / Torque Wrench Tester / Torque Transducer	Capacity upto 20 Nm	10 (Clockwise/ Anti-clockwise  direction)	Using flange type coupling	8500	850	For each additional point	Charges are 1.5 times for devices requiring shaft type coupling
12	Torque	Torque Measuring Devices	Torque Meter	Torque Tester / Torque Wrench Tester / Torque Transducer	Capacity upto 2000 Nm	10 (Clockwise / Anti-clockwise  direction)	Using flange type coupling	17000	1700	For each additional point	Charges are 1.5 times for devices requiring shaft type coupling
13	Torque	Torque Calibrators	Torque Calibration machines	Deadweight,Comparator Torque machine	2000 Nm	10(per range 10% to 100%)	Site Calibration using flange type coupling	50000	5000	For each additional point
14	Torque	Torque Calibrators	Torque Calibration machines	Deadweight,Comparator Torque machine	2000 Nm	10 (per range 10% to 100%)	Site Calibration using shaft type coupling	75000	7500	For each additional point
15	Hardness	Hardness Blocks	Rockwell Hardness Block		Rockwell Scales:A, B, C, D, E, F, G, H, K, N, T	Value assignment at 5 points		2000
16	Hardness	Hardness Block	Vickers Hardness Block			Value assignment in any single range		3000
17	Hardness	Hardness Block	Brinell Hardness Block			Value assignment in any single range

Portable calibrators (electrical, thermal and mechanical values)

Model

Calibration Instruments

Measuring Ranges

7280

TRANS CAL Checking Device for Force, Torque, Length and Pressure
measurement ranges selectable, passive and active sensors, RS232-/USB-interface, peak-to-peak memory, high measuring rate

force,
torque,
displacement,
pressure

4423

Documenting Universal Calibrator DIGISTANT®
The first calibrator for thermal, electrical and mechanical values, like force, torque and displacement. Measuring and sourcing of electrical values at the same time, basic accuracy 0.015, software for documented calibration, 24 pressure pumps selectable and smart sensor interface for sensor connection

measuring and sourcing
of voltage, current,
resistance, freq./puls.,
RTD, TC, pressure,
force, torque
and displacement

4420

Universal Calibrator DIGISTANT® built to use in the field
universal calibrator built to use in field, for quality assurance, start-up and service technicians, portable with a simple menu navigation on display

1 µV ... 11 V
100 nA ... 22 mA
20 mΩ ... 4 kΩ
8 thermocouples
Pt100

4411

Handy Calibrator DIGISTANT®
portable and handy pocket test and calibration device for current and voltage, for measuring or sourcing, appropriate to use in field

10 µV ... 30 V
10 µA ... 24 mA

4417

Handy Temperature Calibrator and Measuring Device DIGISTANT®
Calibration and measurement instrument for 10 thermocouples types, Internal and external reference junction, Calibration and measuring instrument for Pt100, n Calibration and measuring instrument for mV

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Etalonnage de Force

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Etalonnage de Force

Que vous ayez besoin de mesurer une force de 0,01 N ou 4,5 MN, Instron^® peut étalonner votre machine d'essais. Cette opération peut être réalisée dans l'un de nos laboratoires d'étalonnages de force ou par l'un de nos ingénieurs de service qui peut se déplacer dans vos locaux et effectuer un étalonnage sur site. Notre gamme de services offerts reflète notre volonté d'être le leader de l'étalonnage de force dans l'industrie. Premier industriel des essais mécaniques à utiliser des capteurs de force à jauges de contrainte et leader dans la production de systèmes d'essais de haute précision, nous sommes fiers de nos compétences en mesures de force et étalonnages de haute qualité.

Nous réalisons des étalonnages et vérifications conformes aux normes internationales, dont ISO 376 et ASTM E74 pour les appareils d'étalonnage ainsi que ISO 7500-1 et ASTM E4 pour la vérification de force sur machines d'essais. Instron peut également produire des étalonnages conformes à d'autres normes régionales sur demande.

La différence Instron

Instron répond non seulement aux normes d'étalonnages de force internationales, mais les dépasse très fréquemment. Tous nos certificats d'étalonnage comportent des informations détaillées sur l'incertitude de la mesure exigées par les laboratoires d'essai demandant la conformité à la norme ISO/IEC 17025. Nos étalonnages couvrent en général une plus large plage de forces que tout autre fournisseur d'étalonnage pour vous permettre d'utiliser votre machine d'essais à des forces beaucoup plus faibles en toute confiance.

Pile de Poids Morts Haute Capacité

La plus importante pile de poids morts d'Amérique du Nord, en dehors du National Institute of Standards and Technology (NIST), se situe au siège social d'Instron, aux Etats-Unis. Cela nous permet d'étalonner directement nos équipements à de très hauts niveaux de précision.

Systèmes Etalonnés

Machines et instruments d'essais de tous types, équipements de production utilisant des capteurs de force ou de masse, systèmes d'essais manuel push/pull, machines de dureté, bancs d'essais de structures, simulateurs, systèmes mécaniques, électromécaniques ou hydrauliques.

Marques

Instron, SATEC™, Dynatup^®, Wilson^® Instruments, Wolpert™, Schenk^®, MTS^®, Instron IST, Tinius Olsen, Zwick, United, Lloyds Instruments, Mayes, Dennison, Shimadzu^®, Rhiele, Baldwin^®, ATS et autres.

Normes de Vérification de la Mesure de Force pour les Essais

Il existe deux normes internationallement reconnues pour la vérification de la capacité de mesure de force d'une machine d'essais de matériaux. La première est la norme ISO7500-1. La deuxième est publiée par l'American Society for Testing and Materials (ASTM) et est nommée ASTM E 4. Ces deux normes, très similaires, ont été développées durant de nombreuses années et sont techniquement très rigoureuses. Bien suivies, elles permettent de garantir que le système de mesures de force de votre machine d'essais est précis dans des conditions statiques ou semi-statiques. La norme ASTM E 4 précise que la machine d'essais a une précision de 1% de la valeur lue sur la plage vérifiée, ce qui est très différent de 1% de la pleine échelle, comme certains fabricants décrivent leurs produits. La norme ISO 7500-1 définit plusieurs classes de précision, allant de 0,5 à 3. La plupart des machines d'essais sont étalonnées classe 1, qui est l'équivalent des exigences des 1% de la norme ASTM E 4.

Quelle norme d'étalonnages doit-on utiliser ?

Pour la plupart des utilisateurs,  la vérification de leur équipement suivant l'une ou l'autre des principales normes (ISO7500-1 ou ASTM E 4) est une façon peu risquée de s'assurer que l'étalonnage de leurs capteurs de force est fait correctement et la probabilité que leur machine d'essais délivre des résultats erronnés est faible. Ces normes apportent un compromis raisonnable entre la difficulté (donc le coût) de réalisation de l'étalonnage et la qualité des résultats. Une pratique tolérée est la vérification en Europe conformément à la norme ISO 7500-1 et en Amérique du Nord selon ASTM E 4. Des variations existent dans d'autres régions, selon les exigences locales. Ce choix vous revient en dernier ressort, Instron étant capable d'étalonner conformément à l'une ou l'autre norme selon vos exigences.

Zhangjiagang City XinKe Machinery Co. Limited

Contact this Company

BUSINESS PROFILE

Engaged in manufacturing and marketing of force calibrators, enlarging machines and shrinking machines.

CONTACT DETAILS

National Road No. 204, Leyu Town, Zhangjiagang - 215 621, Jiangsu, China

+(86)-(512)-58915172

+(86)-(512)-58602128

+(86)-13301566098

COUNTRY

China

Shanghai Dahe Machinery Co. Limited

Contact this Company

BUSINESS PROFILE

Engaged in production and exporting of force calibrators.

CONTACT DETAILS

8/F, Building 2, Shanghai Textile Technology Industry, Shanghai - 200 120, Shanghai, China

+(86)-(21)-55214599

+(86)-(21)-55214590

COUNTRY

China

Innovative Systems, New Delhi

Contact this Company

BUSINESS PROFILE

Manufacturing and supplying load indicator which includes safe load indicator, safe load indication system, computerized testing machines, digital indicators, digital sensors , safe load indicator for crane, force calibrator, torque calibrator.

CONTACT DETAILS

D - 36, Bhagwati Vihar, Uttam Nagar, New Delhi - 110 059, Delhi, India

+(91)-(11)-28561872

+(91)-9810241902/9013947253

COUNTRY

India

Hung Ta Instrument Co. Limited

Contact this Company

BUSINESS PROFILE

Supplier of all types of automatic weight primary force calibrator, control material testing machine, computer servo control material testing machine, car safety glass impact testing machine and general static tester.

CONTACT DETAILS

No. 23, Jalan Su 8- A, Off Persiaran Tengku Ampuan Taman Perindustrian Subang, Seksyen 22, Darul Ehsan, Shah Alam - 40300, Selangor, Malaysia

+(60)-(6)-51929166

+(60)-(6)-51924066

COUNTRY

Malaysia

Cairnhill Metrology Private Limited

Contact this Company

BUSINESS PROFILE

Dealing into calibrators, gauge blocks, dial gauge, granite surface tables, dial measuring instruments, co-ordinate measuring instrument, force measuring instrument etc.

CONTACT DETAILS

5 Jalan Kilang Barat 07-05-06 Petro Centre, Singapore - 159349, Singapore, Singapore

+(65)-(65)-68900041

+(65)-(66)-65675940

COUNTRY

Singapore

Mechanicas

Contact this Company

BUSINESS PROFILE

Engaged in trading of calibrators, platform load cells, sensors, recorder, digital push pull gauge, load sensors, force sensors and reaction torque sensor.

CONTACT DETAILS

Plot No. 46, Lane No.13, Sahakarvrinda Society Paramhans Nagar, Paud Road, Kothrud, Pune - 411038, Maharashtra, India

+(91)-(20)-25386905

+(91)-(20)-25386905

+(91)-9422088552

COUNTRY

India

Honeywell Sensotec

Contact this Company

BUSINESS PROFILE

Manufacturers of pressure transducers, accelerometers, portable digital calibrators, digital process pressure transmitters and force indicator.

CONTACT DETAILS

2080, Arlingate, Columbus - 43228, Oh, United States Of America

+(1)-(614)-8505000

+(1)-(614)-8501111

COUNTRY

USA

Instrument Laboratory, Inc.

Contact this Company

BUSINESS PROFILE

Dealing into temperature calibrators, heat source calibrators, polymer test equipment, force gauges, test stands, water activity measurement equipment, humidity measurement equiptment, hardness testers etc.

CONTACT DETAILS

2508, West Woodland, Anaheim - 92801, California, United States Of America

+(1)-(714)-2367900

+(1)-(714)-2200700

COUNTRY

USA

Sure Torque Europe

Contact this Company

BUSINESS PROFILE

Manufacturers of digital torque and force meters. Products range from basic closure torque testers and capper head calibrators.

CONTACT DETAILS

Ora Street 10/, Budapest, Hungary

+(36)-(1)-3917389

+(36)-(1)-3917310

COUNTRY

Hungary

Hytech Micro Measurements Private Limited

Contact this Company

BUSINESS PROFILE

Manufacturer of strain gauges, push pull gauge, force gauge, torque sensors, torque tester, torque wrench calibrator, hydraulic torque wrench, bottle cap torque tester, hydraulic jacks, hydraulic torque wrench tester and bottle opening torque indicator.

CONTACT DETAILS

C - 24, L. G. F., Shivalik, New Delhi - 110 017, Delhi, India

+(91)-(11)-26673108/26683970

+(91)-(11)-26683970

+(91)-9818357747

COUNTRY

India

Interface Advanced Force Measurement

Contact this Company

BUSINESS PROFILE

Dealing into miniature load cells, low profile load cells, tank weighing load cells, weigh cells, calibrators / indicators load cell etc.

CONTACT DETAILS

7401, East Butherus, Scottsdale - 85260, Arizona, United States Of America

+(1)-(480)-9485555

+(1)-(480)-9481924

Dead Weight Force and Load Cell Calibrating Machine	PDF Literature
Model : MH

Description

Of all the devices and machines designed to measure mechanical forces none has ever equaled the positive and unfailing accuracy obtainable with dead weights.

Morehouse has two different models of Dead Weight Load Cell Calibrators available: The Model L and the Model MH.

The Model L is available only in capacities of 1,000 lbf or less – standard capacities being 500 lbf and 1,000 lbf, or the approximate equivalent in kilograms or Newtons: 250 and 500 kgf respectively, or 2,500 and 5,000 Newtons respectively.

The Model MH is available in larger capacities – standard capacities being 2,000 lbf, 5,000 lbf, 10,000 to 100,000 lbf, or the approximate equivalent in kilograms or Newtons.

Construction

Both models of the machine are designed to make full use of the accuracy of dead weights without any mechanical interference or machine losses. The yoke assembly on which the dead weights are suspended bears directly on the instrument being calibrated.

There are no intervening levers or flexures between the weight complements of the machine and the instrument being calibrated to introduce ratio and beam deflection errors.

The loading stages on both models are adjustable to accept instruments of varying heights and to allow for tension as well as compression calibrations.

The weights supplied with both machines are machined from stainless steel and are adjusted to better than .003% of their nominal weight. The accuracy of the weights can be certified traceable to the National Institute of Standards and Technology.

Specification

Capacities Available	2,000 lbf – 120,000 lbf and the approximate equivalent in kilograms and Newtons. Special capacities within the weight limitations and special weight complements are available in both models
Calibration Mode	Tension and Compression on both Models
Weights Material	Stainless Steel
	Weights are applied and removed pneumatically with air Controlled selector switches. Operating air pressure : 10 p.s.i.
Accuracy	All weights and yoke assembly are calibrated in force or mass to within 0 .003%. Certified traceable to the National Institute of Standards and Technology

Model L General Information

Standard Yoke Dimensions

The dimensions of the machine’s yoke assembly may be varied to accommodate individual requirements with respect to overall dimensions of load cells or other instruments to be calibrated in both tension and compression.

Dead Weight Force and Load Cell Calibrating Machine	PDF Literature
Model : MH

Description

Of all the devices and machines designed to measure mechanical forces none has ever equaled the positive and unfailing accuracy obtainable with dead weights.

Morehouse has two different models of Dead Weight Load Cell Calibrators available: The Model L and the Model MH.

The Model L is available only in capacities of 1,000 lbf or less – standard capacities being 500 lbf and 1,000 lbf, or the approximate equivalent in kilograms or Newtons: 250 and 500 kgf respectively, or 2,500 and 5,000 Newtons respectively.

The Model MH is available in larger capacities – standard capacities being 2,000 lbf, 5,000 lbf, 10,000 to 100,000 lbf, or the approximate equivalent in kilograms or Newtons.

Construction

Both models of the machine are designed to make full use of the accuracy of dead weights without any mechanical interference or machine losses. The yoke assembly on which the dead weights are suspended bears directly on the instrument being calibrated.

There are no intervening levers or flexures between the weight complements of the machine and the instrument being calibrated to introduce ratio and beam deflection errors.

The loading stages on both models are adjustable to accept instruments of varying heights and to allow for tension as well as compression calibrations.

The weights supplied with both machines are machined from stainless steel and are adjusted to better than .003% of their nominal weight. The accuracy of the weights can be certified traceable to the National Institute of Standards and Technology.

Specification

Capacities Available	2,000 lbf – 120,000 lbf and the approximate equivalent in kilograms and Newtons. Special capacities within the weight limitations and special weight complements are available in both models
Calibration Mode	Tension and Compression on both Models
Weights Material	Stainless Steel
	Weights are applied and removed pneumatically with air Controlled selector switches. Operating air pressure : 10 p.s.i.
Accuracy	All weights and yoke assembly are calibrated in force or mass to within 0 .003%. Certified traceable to the National Institute of Standards and Technology

Model L General Information

Standard Yoke Dimensions

The dimensions of the machine’s yoke assembly may be varied to accommodate individual requirements with respect to overall dimensions of load cells or other instruments to be calibrated in both tension and compression.

http://nutechcalibrators.com/service.htm