Why a 4:1 TUR is Not Enough: The Importance of Analyzing the Probability of False Accept Risk Figure 1 Graph Showing Method 5 Acceptance Limits Several organizations and publications reference the use of a 4:1 Test Uncertainty Ratio (TUR). Some standards even reference a TUR requirement greater than or equal to 4:1. The question to […]
Morehouse 600K Lightweight Load Cell System for ASTM E4 Calibration of Concrete Machines Figure 1 Morehouse Lightweight Load Cell Concrete System with High Stability Indicator This blog is going to discuss the Morehouse Lightweight Load Cell Concrete Compression Machine Calibration kit and the potential error sources associated with using a material with a different hardness […]
Force Measurement Error – Time Interval Between Two Successive Loadings Has anyone ever wondered if there is a difference in calibration results if the time interval between two successive loadings is changed? Is faster better and does it matter if the calibration takes 10 minutes on an automated machine pictured in Figure 2 below, or […]
Morehouse Versatile Cable Tensiometer and Force-Measuring Instrument Calibrator Figure 1 Morehouse 2,000 lbf Cable Tensiometer At Morehouse Instrument Company, we’re justifiably very proud of our new 2,000 lbf Cable Tensiometer Model PCM-2MD-T1. You can see in Figure 1 (above) that our new Tensiometer calibrator provides a safe and practical way to calibrate cable tensiometers. The […]
What Makes a Force Calibration Machine Fit for Use? - Intro Figure 1: Morehouse 1,000 lbf automated deadweight machine At Morehouse Instrument Company, we’re justifiably very proud of our 1,000 lbf Automated Deadweight Machine. You can see in Figure 1 (above) that the force calibration machine looks level and square. What the picture doesn’t show […]
How to Calculate the Uncertainty of a Deadweight Primary Standard Machine Figure 1: Morehouse 1,000 lbf automated deadweight machine Deadweight Force Machines or Primary Force Standard (CMCs as low as 0.001 % of applied force) – a deadweight force applied directly without intervening mechanisms such as levers, hydraulic multipliers, or the like, whose mass has […]
Automatic Deadweight Load Cell Calibration Instrument for Improved Force Calibration Results Figure 1: Morehouse 1,000 lbf Automatic Deadweight Load Cell Calibration Machine Deadweight Load Cell Calibration Machine used to calibrate load cells may vary from ones with the lowest overall uncertainty such as deadweight force standard machines sometimes called primary standards to single or multiple transducer […]
Big News: Morehouse Training, Sessions, and Presentations at NCSLI 2018 in Portland August 26 - 30 Another year and another NCSLI conference are soon approaching. This year both Henry Zumbrun and Edward Lane will be headed out to NCSLI. I will be teaching two tutorials on Monday, August 20th, presenting some torque wrench PT findings […]
Load Cell Stability – How It Can Kill Your Uncertainty Budget Load cells are a combination of metal, strain gauges, adhesive, and more. Like humans, every measuring instrument is subject to aging. Load cells age from mechanical stress or fatigue, and over time this ensures that there will be some instability in the system. Some […]
