Over the years, many of us at Morehouse have been asked what value one should use for Load Cell Reliability when a system is new.
You may think: “I need a load cell reliability number for my uncertainty budget. What should I use?”
The answer is variable as it depends on several factors.
One of the critical factors is figuring out how stable someone needs the load cell system to be to meet their measurement uncertainty requirements.
Is 89 % EOPR acceptable with 95 % Confidence, or is 95 % End of Period Reliability (EOPR) the goal?
The other reaction we often receive is, “No one does that because there are too many variables.”
Load cell reliability will depend on the complete system and its use.
The use would include anything that could influence the results.
Force is mechanical things such as using different adapters, different cables, changing thread engagement, overloading the load cell, the meter used, and the number of loading cycles.
So, after being asked numerous times, we decided to tackle the question, "What should I expect for stability with year-to-year annual calibrations?"
We started by finding enough samples to meet the 95 % Confidence Interval criteria, with 95 % End of Period Reliability, which seemed daunting.
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Mass to Force Guidance: Using mass weights not adjusted for force can result in a large measurement error. The two major measurement parameters typically affected are force and torque. Any measurement involving force should use force. There are acceptable formulas for correcting mass weights to force to enable companies who use mass for these applications to apply known forces. We created this mass-to-force guidance document to help reduce measurement errors associated with using mass weights for applications involving force.
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Measurement Bias: What can happen when we use an accuracy specification and assume all the measurements are centered to the specification limits?
Not correcting for Measurement Bias is a typical problem in the metrology community, where many papers assume a centered process or Measurement and that any known Measurement Bias has been corrected.
The Morehouse technical paper on Measurement Bias examines what happens if we fail to correct Measurement Bias at the bench level and gives examples based using Specific Risk. Specific Risk is the probability that an accepted item is non-conforming or that a rejected item does conform. This risk is based on measurements of a single item.
In general terms, Specific Risk is dependent on a single probability function and can be referred to as Probability of Conformance from the customer’s point of view.
Not correcting for Measurement Bias matters because when a known bias is ignored, meaning not corrected or not included in the Statement of Measurement Uncertainty on the Calibration Certificate, measurement traceability may not be fully achieved, and all subsequent measurements are suspect.
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Force Calibration for Technicians eBook 2022 Edition, available for free by filling in the website form, 60 % more information on measurement uncertainty, calibration coefficients, and best measurement practices for force. Also 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:
Force Calibration for Technicians Version One is also available on Amazon.
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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. For more information on adapters, click here.
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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 calibration machine paper.
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Are you having problems figuring out all of the requirements to calculate a CMC for force uncertainty or torque uncertainty? This Excel sheet provides a template to calculate CMCs with explanations of everything required to pass an ISO/IEC 17025 audit.
Morehouse Free Uncertainty Spreadsheet to Calculate Calibration and Measurement Capability Uncertainty
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Measurement Risk and TUR Calculator Tool - 1 Simple-to-Use Tool: Decision Rules can be difficult to understand, and this worksheet will help simplify things by focusing on measurement risk.
The Morehouse Measurement Risk TUR tool will cure those measurement headaches allowing anyone to calculate TUR properly and Measurement Risk Correctly. Use this tool to input parameters such as accuracy requirement, resolution, measurement uncertainty, TUR, and repeatability with other error sources.
The TUR calculator will calculate how good the reference standard uncertainty needs to be to maintain test uncertainty (TUR) ratios and will allow the end-user to input their own risk tolerances. The TUR Calculator can be found here.
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ASTM E74 Load Cell Selection Guide: Need to know what 0.005 % and 0.01 % of full scale means when calibrating to a specified standard such as ASTM E74? This spreadsheet breaks these numbers down into a % of reading at various force points throughout the calibration range. The ASTM E74 load cell selection guide is a free Excel spreadsheet designed to simplify the selection of ASTM E74 cells. Click here to download the load cells selection guide.
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Morehouse General Information about our force calibration and services. The Morehouse General Information.pdf is a simple-to-use document highlighting some of what Morehouse offers to see if we might be a good fit as far as your needs. Click here to learn more about Morehouse.
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Morehouse General Information A4 about our force calibration and services. The Morehouse General Information .pdf is a simple-to-use document highlighting some of what Morehouse offers to see if we might be a good fit as far as your needs. Morehouse General Information pdf Formated for International Markets. Click here to download a copy of the Morehouse General Information pdf.
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Accredited Force Calibration Services information, including a range of Accredited Force Services provided by Morehouse. These include our deadweight capability, ASTM E74, ISO 376, and information about how we can provide the lowest force uncertainties for your equipment. Click here to download our accredited force services flyer.
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Morehouse offers force training courses and torque training, both virtual and in-person. Our training courses are multiple days and teach the participant the fundamentals of force calibration. The force training course is excellent for all skill levels as we cover what matters most and what many people get wrong (measurement errors, troubleshooting, adapters, uncertainty, technique). Download our information on force training courses here.
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Capability Statement for Morehouse Instrument Company. Cage code 90562. Simple One-Page Statement for Morehouse. Morehouse Instrument Company’s in-house manufacturing facility can build equipment to your specifications. Our ISO/IEC 17025, ANSI/NCSLI Z540.1 & .3 accredited calibration services use primary standards to obtain the lowest uncertainties (10-50 times lower than most service providers) possible.
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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 new dimension to resolution paper here.
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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.
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 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, 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. Check out our blog post on TUR here.
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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 the 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? 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 Measurement Risk paper here.
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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 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 (2014): 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. The article was written by Henry Zumbrun for Cal Lab Magazine 2014.
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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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Force Calibration Guidance for Beginners: If you are new to force calibration or metrology, the information can be overwhelming. This Force Calibration Guidance simplifies everything you need to know. Since force calibration is mechanical in nature, there are many factors to consider. Force Calibration Guidance for Beginners provides a basic understanding of force calibration, the methods and instruments used, industry standards, and best practices.
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Force Calibration Guidance for Technicians and Quality Managers covers more advanced force calibration topics, including loading conditions, adapters, verification of the adjustments, indicators, measurement uncertainty, and selecting the right calibration method. This force guidance will help anyone correct force measurement errors, resulting in better force measurements.
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There is a common misconception about equipment “being compliant” with ISO 376. Many struggle with how to use an ISO 376 calibration and put together an uncertainty budget. ISO 376 Uncertainty Guidance simplifies everything. ISO 376 Uncertainty Guidance provides guidance for the evaluation of measurement uncertainty in the calibration of force-measuring instruments to support CMC in the scope of accreditation and calibration and/or measurement certificates/reports.
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Potential Measurement Errors in Force Calibration: This 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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Morehouse technicians have seen many different load cell issues and have lots of experience identifying and fixing the problems. With this experience, we developed a 7-Step Process for Load Cell Troubleshooting, which will reduce the hours wasted troubleshooting a nonworking load cell to diagnose the problem. Load Cell Troubleshooting Guidance is a must-read for any technician. Click here to download the load cell troubleshooting guidance document.
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Force Calibration Adapters Guidance: Force-measuring instruments are susceptible to errors from improper adapters, misalignment, and not exercising the instrument to full capacity.
Force Calibration Adapters Guidance provides guidance for replicating how the force-measuring instrument is used, keeping the line of force free from eccentric error, and overcoming safety concerns with old adapters.
Several force measurement errors can result from using adapters different from what the force measuring instrument was calibrated with. The basic premise is that mechanical measurements are being made.
Most adapters used at a laboratory level will be manufactured to keep the line force-free from eccentric error and apply the same stresses from the adapter interface to the force measuring instrument that was done at the time of calibration.
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Guidance on Uncertainty Budgets for Force Measuring Devices - A2LA: This provides guidelines for identifying all significant contributions to measurement uncertainty in the calibration of force-measuring instruments. It serves as a means for laboratories to be compliant with A2LA R205 – Specific Requirements: Calibration Laboratory Accreditation Program.
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Calculating Force Uncertainty for force machines. This free document identifies all significant contributions to measurement uncertainty when using a force calibrating machine. Calculating Force Uncertainty describes what is needed to achieve a measurement uncertainty of better than 0.02 % of the applied force.
3 Bar vs 2 Bar Universal Calibrating Machines Comparison Test: This paper describes 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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The Design, Development, and Commissioning of a 2kNm Torque Standard Machine for Highly Accurate Torque Calibrations: This is a 2007 article detailing the world's second-most accurate torque machine at Morehouse. Here at Morehouse, we provide torque calibration from 1Nm to 2kNm. For more details on our torque calibration service, click here.
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Shear Web Load Cell Selection Guide: Have problems selecting the right load cell? Our load cell selection guide walks you through the process of selecting the right load cell for your needs, whether a calibration standard for ASTM E74 and ISO 376 calibrations, ISO 7500, or ASTM E4, or maybe a load cell to measure force in a press, machine, or any other application. Check out our load cells here.
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Ultra Precision Shear Web Load Cell: This Load Cell is the premiere load cell for ASTM E74 Class AA and ISO 376 Class 00 calibrations.
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600k Mini Load Cell - #1 Lightweight E4 Calibration Load Cell: Why carry heavy load cells and hurt your back when there is a high-performance (0.01 % of full scale) alternative that weighs 26 lbs (12.5 kgs)? This mini 600k load cell is perfect for ASTM E4 calibrations on compression testing machines. For more information, download our datasheet here.
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Morehouse High Capacity Load Cells: These are the perfect fit for ASTM E7 and ISO 7500 calibrations. They can be used as reference standards for ASTM E74 and ISO 376 as well as they are known to be better than 0.01 % of full scale on most modes.
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Single-Column Compression and Tension Load Cell: Morehouse Compression & Tension Cell. These load cells are known to be better than 0.02 % of full scale. They are an economical choice for ASTM E4 and ISO 7500 calibrations.
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Low Capacity Load Cell. Morehouse has several options to help choose a cell with low capacity. Our load cell with low capacity is known to be better than 0.02 % of full scale. For more information, please visit our load cell low capacity page here.
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Morehouse Compact Compression Load Cells fit in small spaces with excellent performance. Most achieve well better than 0.01 % of full-scale accuracy. Morehouse Compact Compression Cells have extremely low uncertainties when calibrated with Morehouse Deadweight primary standards. For more information, please click here to download our specification sheet.
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Morehouse 60K Load Cell with 1.25"-12 threads is a great choice for calibration to ASTM E4 and ISO 376. These load cells are better than 0.02 % of full scale, making them a great choice to perform full-range calibrations.
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Morehouse Force Calibration Setups and Adapters: These show the proper way to align load cells with the right adapters to minimize loading errors and improve reproducibility. In force calibration, the wrong adapters and setups can produce errors 20 - 50 times of what is expected.
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The Morehouse Universal Calibrating Machine: This machine is a tested 50-year-plus force machine capable of calibrating load cells, force gauges, crane scales, tension links, and almost all force-measuring instrumentation. For more information about this and several other Morehouse machines, please click here.
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Universal Calibrating Machine Adapters and Accessories: Calibration accessories and adapters for the Morehouse UCM machine. Please visit here.
Morehouse has created multiple adapters and accessories for the Universal Calibrating Machine to meet specific customer application requirements. These have been designed to provide proper loading, alignment, and measurement accuracy.
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Compression and Tension Adapters: Adapters are needed to minimize errors. Our Morehouse Guide for locating the correct adapter for your application can be found @ Compression-and-Tension-Adapters-PG-5943.pdf
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Deadweight Primary Standard Calibrating Machine: These Deadweight Machines are accurate or known to be within 0.002 % of applied force. They are the most-accurate machine to measure forces and calibrate load cells meeting ISO 376 Class 00 & ASTM Class AA requirements. To learn more, please visit here.
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Portable Calibrator Machine PCM: This machine offers a safer and faster way to calibrate low-capacity force instruments (under 2000 lbf). The machine is designed to eliminate manual lifting weights to calibrate several load cells. Most commonly, S-type load cells.
More information on the Morehouse Portable Calibrator Machine is found here
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Benchtop Calibrating Machine V2: Morehouse Benchtop Calibrating Machine for force instruments under 10,000 lbf is an easy-to-use compact machine used for force calibration. The machine can achieve better than 0.05 % of applied force and is suitable for calibrating load cells, crane scales, force gauges, and other force-measuring instrumentation. For more information, please visit https://mhforce.com/product/benchtop-force-calibrating-machine/
The machine has a robust design, easy operation, and smooth force control even at maximum capacity.
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Mechanical Tensiometer Calibrator: Our portable calibrator is perfect for calibrating instruments under 2,000 lbf, such as cable tensiometers, load cells, force gauges, and more. Please visit here.
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Mechanical Tensiometer to Pacific Scientific Tensiometer Calibrator Data Sheet: This Tensiometer can also calibrate other manufacturers' tensiometers. In addition to tensiometers, the Morehouse machine can calibrate load cells, force gauges, tension links, and other force equipment under 2,000 lbf. Click here for more information.
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Morehouse Ring Force Gauge Guide is a .pdf file with information about Morehouse ring force gauges for verification and calibration purposes.
The ring force gauge is a simple, reliable, and low-cost force measurement instrument for monitoring a measurement process, calibrating other force-measuring instruments, or verifying a machine in calibration. It is ideal for applications where high-accuracy certified load cells, proving rings, or digital force gages are not
required.
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Aircraft Scale Calibration and Measurement Capability; 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.
This paper will describe our calibration process, including the calculations of our Calibration and Measurement Capability (CMC), as it appears on our scope of accreditation.
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G501F Digital Load Indicator: This Digital Load Indicator is a simple-to-use load cell indicator that can be used with a single compression and tension load cell. The meter offers a low cost and high value having over 5 span points to pair with almost any digital force-measuring device. Click here to learn more about the G501F Digital Load Indicator and other Morehouse Load Indicators.
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4215-HS Load Cell Indicator: This indicator is a high-stability version of the 4215. This meter is rebranded and sold by many, though not all have the version with the upgraded stability. Click here for more information.
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Morehouse 4215 Plus Load Cell Indicator: This indicator uses the B coefficients from the calibration reports to display lbf, kgf, N. This is a first for this type of meter. To learn more, please visit here.
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Morehouse Calibration Software Instruction Manual The Morehouse calibration software manual discusses software installation, troubleshooting, and operation of Morehouse free-to-download software.
The manual discusses data acquisition using the coefficients from the calibration report. This is the most accurate method to obtain force measurement readings.
The mV/V readings are converted to force units, and as such, the "as found" data is always the same as the "as left," meaning adjustments are done using the coefficients from the calibration report.
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Morehouse High Accuracy Digital Indicator: This indicator uses the USB computer port to power and reads almost any load cell. This 6-wire sensing analog-to-digital USB converter offers the use of our Morehouse direct reading software, with multiple load cell configurations, longer cables, and lower uncertainty. The High Accuracy Digital Indicator provides non-linearity less than 0.002 % of full scale, +/- 20-bit system, with 172 A/D conversions per second. Coefficients from fitted curves are used to convert mV/V to engineering units (lbf, kgf, and Newtons). Click here for more information.
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Morehouse PSD Hand-Held Load Cell Indicator: This indicator runs on 2 AA batteries and is perfect for quick verification checks. The hand-held indicator is simple to use and has two channels. Looking for more information or another type of load cell indicator, please click here.
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DSC - USB Load Cell Indicator: This indicator from Morehouse is a compact, easy-to-use USB-powered load cell indicator. Suitable for calibration of load cells, testing machines, and other force or torque systems. Click here to learn more.
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LAC 65.1 is currently in stock! This is an exceptionally stable and accurate amplifier with high versatility, the LAC Load Cell Amplifier for Controllers can help make your industrial control or automation system more effective. Download our datasheet here. For more information on our meters, click here.
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G501F Indicator Manual: The Morehouse G501F is a single-channel load cell indicator for force measurement applications. It provides high value at a low cost, delivering reliable performance and high-resolution measurements. The portable unit can operate on AA Alkaline batteries, rechargeable batteries, or the AC adapter. Download the manual here. For more information on the G501F indicator, click here.
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4215 Plus Load Cell Indicator Manual: Use the coefficients to convert mV/V into lbf, kgf, N, and eliminate span calibration errors when you use the calibration equation of several ASTM E74 & ISO 376 calibration reports. More information on our 4215 plus can be found here.
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4215 Plus Polynomial Instructions: Quick set of instructions for use to enter polynomial coefficients into the Morehouse 4215 plus indicator. More information on all of our meters can be found here.
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Morehouse LAC load cell amplifier manual. If you are looking for a load cell amplifier, we believe this one is the best! If you are looking for other load cell indicators, please click here.
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PSD strain gauge indicator manual. The PSD strain gauge indicator is a handheld device with 2 channels and a 2-pt span for each channel. Click here for more information on Morehouse strain gauge indicator options.
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Morehouse Universal Calibrating Machine Manual: Morehouse Universal Calibrating Machines were originally developed to make use of the inherent high accuracy of Morehouse Proving Rings to calibrate working load cells. Today, calibrating machines are used extensively in industrial, government, and military laboratories, not only for the calibration of load cells but for calibrating force transducers, dynamometers, load rings, force links, and other force measurement devices.
Other Morehouse force calibrations to measure compressions and tension forces can be found here.
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Morehouse Hydraulic Hand Pump Morehouse UCM manual: The hydraulic jack is activated by a two-speed hand pump. It is a dual-volume design based on a double-diameter piston. An auxiliary screw piston (Vernier piston) is provided on the pump for the application of minute increments of force. The pump is connected to the hydraulic jack by means of a hydraulic hose assembly with a quick-disconnect coupling.
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Auxiliary Hydraulic Screw Pump Manual: The manual for this Morehouse product. Click here to download the manual.
The Morehouse screw pump (P/N: 66-806) is set up to be used with the Morehouse hydraulic jack along with the existing hand pump or hydraulic power control. The screw pump can provide up to 0.15 inch of stroke on the 100,000-pound hydraulic jack. The screw pump is intended to maintain the load during testing and calibration and will allow the generation of decreasing loads.
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The portable Calibrating Machine Manual is a manual for the operation and maintenance of the Morehouse portable calibrating machine (PCM). This machine is designed for low-force applications of up to 2,000 lbf of force. The machine is designed to eliminate the need for stacking weights and improving ergonomic issues. The manual for Morehouse Portable Calibrating Machine can be found here.
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Benchtop Calibrating Machine Manual: The benchtop calibrating machine is accurate to better than 0.05 % of applied force and is used to calibrate force-measuring instruments up to 10,000 lbf. More information on our force machines can be found here.
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Digital Proving Ring: This Morehouse device is a replacement for the 95-plus-year-old analog rings. The digital ring is easier to use and has better reproducibility. Please click here for more information.
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Brinell Calibrator for ASTM E10: ASTM E10 Standard Test Method for Brinell Hardness references calibration and verification of the forces. The Morehouse Brinell Calibrator is a great device for force verification. More information on our Calibrator for ASTM E10 can be found here.
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The Morehouse Force Proficiency Test Rental Kit can help satisfy ISO/IEC 17025:2017, Section 7.7.2 requirement for interlaboratory comparisons. Our Force Proficiency Test Rental Kit is perfect if you need to satisfy your 4-year Proficiency Test requirement, if you need to validate your force measurement uncertainties, or need to prove the competence of a new technician. If you need more information, click here.
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Morehouse Concrete Compression Machine Calibration Kit: This kit is perfect for ASTM E4 calibration of testing machines. The Concrete Compression Machine Calibration Kit has several configurable options. Please click here for more information.
A List of Features:
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Morehouse Quick Change Adapters for Tension Force Calibration: This is based on ISO 376 specifications and simplifies Tension Calibration Setups for load cells, crane scales, Tension Links, Dynamometers, and much more. For more information on our Quick Change Adapters for Tension and other adapters, please click here.
Calibrating force instruments in tension always requires proper adapters, and considering the vast diversity among force instrument configurations, a general calibration laboratory might need to acquire hundreds of different adapters to perform tension calibrations. Quick-Change Tension Adapter addresses this issue by providing a system that is convertible to almost all force instrument configurations using smaller intermediate adapters, which can be obtained at considerably lower cost
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Morehouse Clevis Kits 12k lbf Capacity: The Morehouse Clevis Kits 12k lbf simplifies TensionSetups for crane scales, Tension Links, Dynamometers, etc. Tension links can have huge errors from not using the correct pin size. These kits feature one set of clevises and multiple pins with various diameters, protective rollers for the pins subjected to concentrated loading from shackles, precision manufacturing to ensure levelness, alignment, and manufacturer’s specified pin diameters, can be used with Quick-Change Tension Members, and Adapters for improved alignment and easier setup, fast changeover between units under test by using the same clevis and changing the pins. All parts are rust-resistant. More information can be found here.
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Morehouse Clevis Kits 30k lbf Capacity: Morehouse Clevis Kits 30k lbf simplifies TensionSetups for crane scales, Tension Links, Dynamometers, etc. Tension links can have huge errors from not using the correct pin size. These kits feature one set of clevises and multiple pins with various diameters, protective rollers for the pins subjected to concentrated loading from shackles, precision manufacturing to ensure levelness, alignment, and manufacturer’s specified pin diameters, can be used with Quick-Change Tension Members, and Adapters for improved alignment and easier setup, fast changeover between units under test by using the same clevis and changing the pins. All parts are rust-resistant. More information can be found here.
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Morehouse Clevis Kits 60k lbf Capacity: The Morehouse Clevis Kits 60k lbf simplifies TensionSetups for crane scales, Tension Links, Dynamometers, etc. Tension links can have huge errors from not using the correct pin size. These kits feature one set of clevises and multiple pins with various diameters, protective rollers for the pins subjected to concentrated loading from shackles, precision manufacturing to ensure levelness, alignment, and manufacturer’s specified pin diameters, can be used with Quick-Change Tension Members, and Adapters for improved alignment and easier setup, fast changeover between units under test by using the same clevis and changing the pins. All parts are rust-resistant. More information can be found here.
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Morehouse Clevis Kits 120k lbf Capacity: The Morehouse Clevis Kits 120k lbf simplifies TensionSetups for crane scales, Tension Links, Dynamometers, etc. Tension links can have huge errors from not using the correct pin size. These kits feature one set of clevises and multiple pins with various diameters, protective rollers for the pins subjected to concentrated loading from shackles, precision manufacturing to ensure levelness, alignment, and manufacturer’s specified pin diameters, can be used with Quick-Change Tension Members, and Adapters for improved alignment and easier setup, fast changeover between units under test by using the same clevis and changing the pins. All parts are rust-resistant. More information can be found here.
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Morehouse 30k lbf Tension Adapter Value Kit: This Kit was based on ISO 376 specifications and simplifies Tension Calibration Setups for Load Cells, crane scales, Tension Links, Dynamometers, and much more. For more information on our 30k lbf Tension Adapter Kit and other Kits, please click here.
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Morehouse 60k lbf Tension Adapter Value Kit: This was based on ISO 376 specifications and simplifies Tension Calibration Setups for Load Cells, Crane Scales, Tension Links, Dynamometers, and much more. For more information on our 60k lbf Tension Adapter Kit and other Kits, please click here.
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Morehouse 120k lbf Tension Adapter Value kit: This kit was based on ISO 376 specifications and simplifies Tension Calibration Setups for load cells, crane scales, Tension Links, Dynamometers, and much more. For more information on our 120k lbf Tension Adapter kit and other kits, please click here.
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Miniature Load Cell Washer Adapters: Miniature Load Cell (Washer Load Cell) Adapters from Morehouse improve performance by centering the miniature load cells eliminating parasitic errors. Learn more by clicking here.
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Button Load Cells Adapters can improve the performance of many Button Load Cells by a factor of 5. Morehouse has done testing, written articles, and made the best adapters to keep the line of force pure. Our Button Load Cells adapters guide has more information and can be found here
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Ring Force Gauge Manual: The Ring Force Gauge is relatively simple to operate. If maximum accuracy is desired, the Ring Force Gauge should be placed near the location where it is to be used and allowed to stabilize at the ambient temperature that will prevail during use. Deviations from the temperature at which the Ring Force Gauge was calibrated will cause errors of approximately 1% for every 70 degrees F
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The Digital Ring Force Gauge Manual is Attached Below:
The Digital Ring Force Gauge is relatively simple to operate. If maximum accuracy is desired, the Digital Ring Force Gauge should be placed near the location where it is to be used and allowed to stabilize at the ambient temperature that will prevail during use. Deviations from the temperature at which the Digital Ring Force Gauge was calibrated will cause errors of approximately 1% for every 70 degrees F.
A Digital Ring Force Gauge consists of a load ring that deflects under compressive or tensile forces. The deflection of the ring is continuously measured by a digital indicator mounted inside the ring. The indicator is programmed by the Morehouse primary force calibration laboratory and interprets the deflection values to direct calibrated force values and displays on the digital screen. The indicator displays the force in the engineering units as specified by the user at the time of purchase.
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@Digital Ring Force Gauge Manual
Our Morehouse Proving Ring Manual: Morehouse Proving Rings are recognized as the premier force standard wherever highly accurate force calibrations are performed. This reputation has been earned by uncompromising conformance to the standards originally established and maintained by the United States National Institute of Standards & Technology.
Anyone wanting to learn more about Morehouse Proving Rings should visit our Proving Ring Page here.
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Morehouse can help lower your load cell sensor measurement uncertainty by calibrating these force sensors using standards up to 20 times more accurate than commercial calibration laboratories. Please click here for more information on our cell sensor calibration services. Click here for a list of the available sensors we offer for sale.
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Morehouse Wireless Load Cell: Morehouse can provide a wireless cell or convert any load cell into wireless with different interface options. A wired interface to a load cell can present several challenges in environments that span large areas. Therefore a wireless cell might be beneficial. To learn more about our wireless options, please contact sales @ info@mhforce.com. To read a case study on a full wireless cell solution with adapters, please click here.
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Remedy for Side Loading and Too Many Adapters: What happens when a load cell experiences side loading? This case study examines how too many adapters can contribute to side loading problems and, ultimately, high errors. Morehouse focuses on how to eliminate excess adapters and use the proper adapters to minimize side loading errors. Our case study can be found by clicking here.
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Morehouse Verification Sheet for Legacy Software: This is a one-sheet verification for the Morehouse Calibrator legacy software. The verification verifies the software converts the mV/V values properly.
The end-user must still verify they have entered the coefficients correctly. The sheet provides the verification documentation necessary for audits.
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#verification
Morehouse Calibration Software
New Release Page (click to visit)
Instruction Manual (click to download)
Morehouse calibration software allows readings from any number of Morehouse indicators that have a communication output (USB or serial). If multiple indicators are used, their values can be added together to show a total value.
The software displays values by converting the readings from the indicator(s) using the calibration coefficients (typically from ASTM E74 or ISO 376 calibrations). Additionally, the software can do the unit conversion (between force units and mass units), and mass conversion, and adjust the resolution at the values shown.
Morehouse force software verification Excel sheet. The Excel sheet verifies the force software from Morehouse. The sheet includes formulas and screenshots to prove the Morehouse force calibration does what it should. Download our force verification sheet for force verification.
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Software for reading two indicators at the same time
V1.3.5: Force calibration software for use with Morehouse 4215, HADI, or DSC-USB Indicators. Read two indicators at the same time.
The software uses coefficients from ASTM E74 calibration and displays engineering units as well as capturing data with a remote control device and pausing readings etc..,
Reporting section helps with ASTM E4 field calibrations. Must have Morehouse 4215, HADI, or DSC-USB indicator to use this software.
The software is designed to work with Morehouse indicators, Dual Channel 4215, 4215 HS, 4215, 4215 plus, HADI, and the DSC USB.
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Morehouse Torque Installer Software V1.2:
The torque installer software is the universal version for torque calibration which allows for lbf ft and N m coefficients to be entered. PEAK HOLD and new windows 8/10 drivers on this version. Inverse B0 coefficients.
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Easy to Use Tool for Calculating Expanded Uncertainty Per Point at the time of Calibration
Want to know how we are calculating expanded uncertainty on force and torque certificates? This spreadsheet has all of the formulas that comply with ILAC-P14:09/2020 ILAC Policy for Measurement Uncertainty in Calibration at the time of calibration. The calculation for expanded uncertainty is drastically simplified and easily explained with this tool.
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The ASTM E74 Coefficient Calculator is free software from Morehouse to help calculate higher-order coefficients per ASTM E74 and ISO 376. E74 Coefficient Calculator contains macros because it uses visual basic coding to generate the coefficients.
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Measurement Risk Calculator: This calculator was presented at the A2LA tech forum and NCSLI; this easy-to-use Calculator tool allows one to determine the effect of the resolution of an instrument on the overall measurement uncertainty and risk. One can use this tool to analyze the effects on TUR and measurement risk as well. Check out all of our spreadsheets here.
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Method B Interpolated Zero Calculator: Use this free calculator to easily interpolate the ending zero throughout your dataset. Compliant with ASTM E74 Method B and ISO 376 for ending zero reduction. Download the Calculator tool by clicking here
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Probability of False Accept (PFA) Worksheet: Probability of False Accept - Free Excel Worksheet. Decision Rules can be difficult to understand, but this worksheet will help. Use this tool to input parameters such as accuracy requirement, resolution, measurement uncertainty, and repeatability with other error sources. It will help make decisions on equipment, such as: Should I buy a device with better resolution? Do I need my calibration provider to have better measurement uncertainty than what I am getting? It also provides different Methods, using different decision rules (Method 5 and 6). The PFA calculator contains macros.
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Proving Ring Load Tables spreadsheet to print load tables for Proving Rings. This is used for ASTM E74 calibrations where the end-user does not want to use a computer and wants to print tables to interpolate force points. The load tables sheet can be downloaded here.
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Proving Rings Used as Standards is a Free excel sheet to correct for temperature and tare weight when using Morehouse Proving Rings. Calibration load points for Proving Rings as standards in a Morehouse UCM. Click here to download Proving Rings Standards Excel sheet.
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Morehouse A and B Coefficients for Load Cells:
This free Load table generator for Morehouse A and B Coefficients is found on calibration certificates. This useful tool allows you to print load tables
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Force Calibration Made Easy helps anyone new to metrology to understand the basics of force measurement. Even seasoned metrologists may learn something new from force calibration for beginners part 1. Morehouse Instrument Company has shared tremendous knowledge throughout the years with blogs, technical papers, and webinars. This education aligns with our purpose to create a safer world by helping companies improve their force and torque measurements. To simplify things, this two-part article was written to help anyone new to force measurement. Click here to read part 1.
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#force calibration made easy
Obsolete - Proving Ring Electric Reed Vibrator Manual
Below is an operation and instruction manual for the obsolete proving ring electric reed vibrator. Newer proving rings are made with a digital indicator. Older proving rings can be upgraded to digital by replacing the internal micrometer, dial, read, and electric red vibrator.
More information on our digital rings and retrofit options can be found here.
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Obsolete - CellMite Digital Signal Conditioners Manual
This info is kept for anyone needing it. We have much better solutions for those needing an indicator for their load cell. USB solutions, Software solutions. Please click here for a list of indicators we currently offer
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Obsolete - Bulletin 271-18 UCM Accessories and Adapters
This is a catalog on obsolete Bulletin 271-18 UCM accessories and adapters.
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Obsolete Version - Morehouse Software Installation Instructions for DSC, 4215, and HADI
Installation instructions for Morehouse software. This software uses the B coefficients from the calibration report and converts the mV/V readings into engineering units. The coefficient files must be changed every time a new certificate is issued. This software helps automate the calibration process and is used with the Morehouse 4215, HADI, and DSC indicators.
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Morehouse Software Download
Here is a link to legacy software that is no longer supported. We recommend downloading our new software for the DSC, HADI, 4215, and other indicators. The Morehouse Software Download can be found here.
The new DSC-USB, as well as the 4215 plus indicators, may need additional configurations if they are to work with this legacy software.
V1.4.2: This is the universal version that allows for LBF, KGF, N, and kN coefficients to be entered. PEAK HOLD and new Windows 8/10 drivers on this version. Inverse B0 coefficients. This software was retired in 2020.
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