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Standards and Technical Documents - Metallic materials -- Verification of static uniaxial testing machines -- Part 2: Tension creep testing machines -- Verification of the applied force -- ISO 7500-2:2006
Description: ISO 7500-2:2006 specifies the verification of testing machines used for uniaxial creep testing in tension in accordance with ISO 204. The verification consists of a general inspection of the testing machine, and a verification of the force applied by the testing machine. ISO 7500-2:2006 applies
Supplier: ASTM International
Description: Design and Performance of a Deadweight Standard Rockwell Hardness Testing Machine Volume 6, Issue 4 (July 1978) The design principles and main features of a deadweight standard hardness testing machine developed at the Instituto di Metrologia "G. Colonnetti" are described. Vickers and Brinell tests
Supplier: Gilson Company, Inc.
Description: Direct/Residual Shear Machine is a motorized, dead-weight testing machine designed for direct and residual shear testing of undisturbed and remolded soil samples. A solid 1-1/4in (32mm) base for the Shear Box assembly is mounted on a sturdy steel cabinet, with heavy duty casters for easy mobility
Supplier: Zwick USA
Description: Hardness Testing Instrument Zwick/ZHU 187,5 The various versions of the Zwick/ZHU187.5 universal hardness tester are used for Vickers, Brinell and Rockwell testing. Special features: versions to suit different load step combinations dead-weight loading variable test times from 1 to 50 s LCD
- Hardness Testers: Brinell, Rockwell, Vickers and Knoop
- Mounting: Fixtured or Permanent
- Test Load: 0.0 to 413 lbs
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Interface, Inc. - AZ
World’s Largest Deadweight Machine Gets a Bath
for recalibration. A deadweight machine is a mechanical structure that generates force by subjecting deadweights to the local gravitational field. Deadweight machines are used for precise definition of the force scale. NIST ’s machine is used by U.S. aerospace manufacturers, U.S. military laboratories, and several top-end commercial force calibration labs, which have performed hundreds or thousands of calibrations, all directly traceable to NIST. Built in 1965, the deadweight system consists of a stack... (read more)
Browse Calibration and Reference Standards Datasheets for Interface, Inc. - AZ
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The World's Largest Deadweight Machine is Getting a Bath
The National Institute of Standards and Technology (NIST) is in the process of cleaning, restoring and recalibrating its 4.45-million Newton deadweight machine. Known to be the largest in the world, that's equivalent to one million pounds-force. This is the first time in 50 years the NIST has
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Analysis of deadweight oscillation in a deadweight force machine using a build-up system
When a build-up system is calibrated using a dead- weight machine , the oscillating signal components of force transducers in the build-up system are strongly related to the motion of deadweight.
Pendulum motion of a deadweight force-standard machine
This results from the pendulum motion of the deadweight machine .
The role of stress analysis in the design of force-standard transducers
In load-cell calibration, the devices employed for force generation are usually standard deadweight machines , or machines of mechanical or hydraulic amplification type, as their accuracy reaches values of the order of 10-5 and l0-4, respectively.~7 Use of these �
A high precision method for comparing large masses using load cells
The tests described show that deadweight machine masses of 2 tonnes can be compared with an uncertainty of 1 PPM using equipment generally available in a force standards laboratory.
Deadweight machines enable these and other measurements to be made with sufficient accuracy by calibrating portable force measuring devices-mainly .
Misalignment sensitivity test for load cells
All of the tests were performed in the National Institute of Standards and Technology (NIST) 6.1 klbf (27-kN) deadweight machine .
Three-dimensional strain rosettes: Pattern selection and performance evaluation
Some side effects of deadweight machine on model are pointed out by analysis of residuals .
A novel hydraulic force standard machine
Considerable resources are required to establish a deadweight machine of capacity 500 kN or above, and in this range force standards often consist of more complex machines utilizing smaller weights with lever amplification, or machines using hydraulic amplification .
signal components of a dead-weight force-standard
machine and reduction techniques
It is clear that the dead- weight machine can move more freely along the x direction than it can along the y direction.
Automation Update of Force Laboratory Deadweight Machines
NIST Home�>�PML�>�Quantum Measurement Division�>�Mass and Force Group�>�Automation Update of Force Laboratory Deadweight Machines .
RECENT ADVANCES IN EXPERIMENTAL MECHANICS IN ITALY
Among the various topics mentioned, attention is given to contributions regarding: design and operation of a new force standard deadweight machine ; developments of the hole-drilling method for residual stress analysis; conju- gate-wave hologram interferometry for measurement of in-plane deformations �
Establishing a world-wide unified Rockwell hardness scale with metrological traceability
All eleven indenters were tested by the NIST standard deadweight machine using the same test cycle.
Effects of early and delayed laser application on nerve regeneration
This is the so-called deadweight machine .
Springer Handbook of Metrology and Testing
Deadweight machines A known mass is suspended in the Earth�s gravita- tional field and generates a force on the support < 0.001% .