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Morehouse has a collection of tools, videos & documentation to assist customers in optimizing their calibration & testing products. Use the filter on the left to assist in finding the specific support item needed.
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Force Calibration for Technicians and Quality Managers eBook

Force Calibration for Technicians eBook, available on Amazon, contains guidance on factors that ensure repeatable results through the entire measurement chain. For force-measuring devices, there are various mechanical and electrical interfaces that matter. At the time of calibration, these consist of:

  • Selecting the right calibration method
  • The loading conditions
  • Adapters
  • Verification of the adjustments
  • Meters

Force Calibration for Technicians is also available for free by filling in the website form.

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Recommended Compression and Tension Adapters for Force Calibration

We buy a great force standard, we demonstrate metrological traceability, & we make a force measurement. Without the proper compression and tension adapters, the errors can be over 10 times that of the specification. This article discusses the importance of compression and tension adapters and provides solutions for better calibrations using the appropriate compression and tension adapters.

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Portable Force Machine Solves Several Measurement Management Headaches

Portable Force Machine Solves Several Measurement Management Headaches. This paper examines several “bad” measurement practices, such as using multiple technicians to calibrate instruments (including hand-held dynamometers). Such practices include using a free-floating cable and stacking weights to calibrate a cable tensiometer. We discuss how a portable force calibration machine can be used to improve efficiency and solve several measurement challenges. Click Here to read our portable force machine paper.

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The new dimension to resolution: Can it be resolved?

The new dimension to resolution paper. This paper stresses the importance of considering the unit under test resolution in a measurement uncertainty budget. Download our the new dimension to resolution paper here.

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Converting a mV/V Load Cell Signal into Engineering Units can be Easy

Converting a mV/V Load Cell Signal into Engineering Units is a common need in the industry. This paper discusses the pros and cons of how meters handle Converting a mV/V Load Cell Signal into Engineering Units. The paper discusses significant error sources and best practices for using an indicator with a mV/V signal, and we offer guidance on some indicators that can convert that signal into engineering units.

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The top 4 Common Measurement Errors in Weighing

A paper on the Common Measurement Errors in Weighing. Anyone calibrating or using crane scales, load cells, dynamometers, truck scales, and aircraft scales will benefit from learning about the various common errors in weighing. Download our Common Measurement Errors in Weighing paper here.

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Why a 4 to 1 TUR is not enough: The importance of analyzing the probability of false accept risk

Several organizations and publications reference or insist on maintaining a 4 to 1 TUR (Test Uncertainty Ratio) without understanding the level of risk that they may be subjecting themselves to. The general thought is if the lab performing the calibrations has standards at least four times better than what they are calibrating that everything is good. This paper discusses TUR, PFA Risk, and why the location of the measurement matters. We will discuss two managed risk guard banding methods (5 & 6) found in the ANSI/NCSL Z540.3 Handbook. We will show that a 4 to 1 TUR is not enough and can result in a 50 % risk.

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An Introduction to the Differences Between ASTM E74 and ISO 376 the Two Most Recognized Force Standards

The differences Between ASTM E74 and ISO 376 can be confusing. Morehouse has been performing both ASTM E74 and ISO 376 calibrations for more than fifteen years. We have been calibrating in accordance with the ASTM E74 standard since its introduction in 1974, and performing ISO 376 calibrations since sometime in early 2000. Until recently, we assumed that the rest of the world and force community knew that the standards were completely different and that either standard could not be substituted for another. This paper explains those differences in more detail.

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What is measurement risk?

What is measurement risk? Measurement decision risk is the probability that an incorrect decision will result from a measurement. Are you telling your customers instrument passes without considering measurement uncertainty? If taken to court, are your measurement defensible? This paper examines the proper way to make statements of compliance. Download our what is measurement risk paper here.

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Uncertainty Propagation for Force Calibration Systems

Have trouble understanding Uncertainty Propagation for Force measurement and how to put together a budget? This paper examines all of the components required to put together a full calibration and measurement capability (CMC) reviewed by Accreditation Bodies for your scope. This Uncertainty Propagation for Force guide to calculating force measurement uncertainties & was published in Cal Lab magazine. Download our Uncertainty Propagation for Force paper here.

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Analyzing the effects of reducing the ending zero vs ignoring the trailing zero on measurement instruments used for force calibration

ASTM E74 Method A and Method B—for the treatment of reducing the ending zero. Method A defines the deflection calculation as the difference between the deflection at an applied force and the initial reading at zero force. Reducing the ending zero Article written by Henry Zumbrun for Cal lab Magazine 2014.

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Load cell dual-range calibration - force potential measurement error

Load cell dual-range calibration errors happen when a load cell is not loaded to full capacity. The molecules inside the load cell do not react potentially causing an increased error. What you need to know about molecule excitement decline and dual-range calibrations. Article from Test Magazine May 2016 issue.

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Potential Measurement Errors in Force Calibration

Potential Measurement Errors in Force Calibration Article covers the most common errors one must know when making calibrating force instrumentation.

Potential Measurement Errors in Force Calibration in published test magazine from Oct-Nov 2015 issue.

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3 Bar vs 2 Bar Universal Calibrating Machines Comparison Test

3 Bar vs 2 Bar Universal Calibrating Machines Paper describing the difference between these two designs. The paper compares the repeatability and reproducibility characteristics and examines if there is a significant difference in the performance and measurement uncertainty between the two designs.

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Aircraft Scale Calibration and Measurement Capability

Aircraft Scale Calibration for several aircraft scales requires one to replicate the footprint of the tire. Not doing so may produce out-of-tolerance conditions or a very high bias. Information on our aircraft scale calibration services can be found here. Information on Aircraft scale calibration machines can be found here.

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