Guidance on Uncertainty Budgets for Force Measuring Devices Part 4. Calculating Uncertainty for ISO 376 Uncertainty Analysis ISO 376 Uncertainty Analysis Introduction: All calibration laboratories accredited to ISO/IEC 17025 are required to submit uncertainty calculations for the Calibration and Measurement Capability uncertainty claims included in the scope of accreditation. The assumptions made for the determination […]
Guidance on Uncertainty Budgets for Force Measuring Devices Part 3. Calculating Uncertainty for Force Measuring Devices for Measurement or Calculating Uncertainty for Force Measuring Devices Background: Currently, there are discrepancies regarding what is acceptable for a force calibration uncertainty budget. A common mistake is to include too many lines from the load cell specification sheet. For […]
Guidance on Uncertainty Budgets for Force Measuring Devices Part 2. Calculating Uncertainty in Accordance with ASTM E74 Standard Calculating Uncertainty in accordance with ASTM E74 Standard Background: ASTM E74 Standard Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machines is the standard followed by many in North America for the […]
Guidance on Uncertainty Budgets for Force Measuring Devices Part 1. Why Do We Need a Solid Guidance Document? Uncertainty Budgets for Force Measuring Devices Introduction: All calibration laboratories accredited to ISO/IEC 17025 must submit uncertainty calculations for the Calibration and Measurement Capability uncertainty claims included in the scope of accreditation. The assumptions made to determine the uncertainty […]
What is Measurement Risk? What is Measurement Risk - Imagine that a satellite is launched into space and communications are intermittent. This happens because the satellite is wobbling, which causes connectivity problems in the receiver. The cause of the wobbling is identified: it is the result of not using a calibration provider with a low […]
Does Resolution Need to be in an Uncertainty Budget? There’s a question I’ve heard asked more often than it should be: "Does resolution need to be in an uncertainty budget?" If the device’s digital resolution displays the least significant digit increment as a single digit from zero to nine, it is assumed that it somehow […]
Calibration Intervals - When is it Time to Recalibrate? Calibration Intervals A calibration interval is the period between two consecutive calibrations of MT&E. This interval is crucial for ensuring that the equipment continues to operate within its specified performance and the claimed Calibration and Measurement Capability (CMC) uncertainty parameter, sometimes referred to as […]
Top 5 Common Force Measurement Errors Top 5 Common Force Measurement Errors - At Morehouse, we strive to replicate the loading conditions a customer may be using. Some other labs, may not follow this process and the additional measurement uncertainty from not replicating use, may create a significant error source. Below are the top 5 […]
Load Cell Measurement Errors: Can a Load Cell Adapter Plate or Block be Interchanged Without Introducing Additional Errors? Load cell measurement errors - Hardness of the top block used for calibration can result in errors as high as 0.5 % of applied force. We have seen large errors from customers switching out top blocks or […]
Calibration and Measurement Capability (CMC) Force Workbook- ASTM E74 Uncertainty Morehouse has developed a force workbook in Excel to help those trying to figure out measurement uncertainty and how to calculate their Calibration and Measurement Capability (CMC). Updated 10/30/2021! The new update contains coefficients for interpolating uncertainty. Most of this workbook is set up for […]
Morehouse 7-Step Process For Troubleshooting A Load Cell Visual Inspection Lets Us Know Which Cell Is Damaged Troubleshooting A Load Cell Simplified. Have you spent countless hours trying to figure out what is not working? Is it the load cell, is it the meter, the cable, or something else? We have wasted countless hours trying […]
Metrological Traceability for Force Metrological Traceability for Force - Metrological Traceability: Property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty. This article will define each level of the measurement hierarchy as it relates to measurement uncertainty for […]
