What is Accuracy? Can We Trust the Manufacturer's Specifications? What is Accuracy? Accuracy is influenced by both precision and bias in the measurement process. To understand accuracy, one must understand bias, systematic measurement error, random measurement error, measurement error, and precision. Manufacturers' accuracy specifications may be misleading as they may not tell you how the […]
Tension Links: Are Your Measurements Accurate? You are out in the field with a tension link, load link, or some type of digital dynamometer to use for a weighing application. You need pins to engage into the unit. What can you use? Slings? Maybe one size pin with one diameter on one end and another […]
Calculating Calibration and Measurement Capability (CMC) Using the ASTM Lower Limit Factor (LLF) In accordance with the ASTM E74 standard, Morehouse reports the ASTM Lower Limit Factor (LLF), which is reported on page one of the calibration certificate and is not uncertainty. ASTM E74-06 used to call LLF the uncertainty. The ASTM E74-06 standard was […]
Shipping Measurement and Test Equipment (MT&E) For Shipment Shipping Measurement and Test Equipment Packing Specialist The word improper is defined as unsuitable for a certain use or occasion. Improper packing is often the leading cause of damage occurring during shipment. Investing in the proper shipping containers and proper training for those packing equipment should be […]
Excellent Force and Uncertainty Training - Applied Fundamentals of Force Calibration FORCE AND UNCERTAINTY TRAINING COURSE DESCRIPTION: This course will cover applied force calibration techniques and will include live demonstrations using secondary standards to exhibit potential errors made in everyday force measurements. The measurement errors demonstrated and discussed will include errors associated with improper alignment, use […]
Why Force Measurements Matter - Force Transducer Testing and NASCAR Why Force Measurements Matter - Photo Courtesy of Associated Press Austin Dillon went cascading into the catch fence at Daytona Speedway on the early morning of July 6th, 2015. Was he thinking of all the testing his NASCAR Sprint Cup car goes through? Absolutely not! […]
Important Force Measurement Error - Thread Loading In Compression - Intro It is important to remember that not all calibration laboratories provide the same type of calibration service. For load cells calibrated in compression, there may be a noticeable difference in output. The output is dependent on the calibration fixtures used at the time of […]
Primary Force Standards (As Defined per ASTM E74) Morehouse Deadweight Machine ASTM E74 Standard Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machines (section 3.1.2) defines a primary force standard as a deadweight force applied directly without intervening mechanisms such as levers, hydraulic multipliers, or the like, whose mass has […]
Point of Use to Save Time Morehouse 10 MN UCM Have you ever noticed a technician running around your facility asking, “Does anyone have a 5/32-inch Allen wrench?” Well, if you are reading this and you are not in the United States, Liberia, or Burma, the 5/32-inch may not make much sense. Didn’t the US […]
Morehouse is proud to present Single Measurement Bliss! by Dilip Shah When you make the first measurement, everything looks fine. It is when you make a second, repeated measurement and it is different from the first measurement that doubt begins to arise. Which one is the correct measurement? Then, you take a third measurement, and […]
Unbolting Load Cells May Not Produce Repeatable Calibration Results Unbolting Load Cells might be common practice, though the errors associated with this practice can be quite high. This article discusses ways to minimize these errors regarding unbolting load cells. Bolting a Load Cell Thread Class and Torque Applied • Morehouse recommends bolting a load cell to […]
How to Convert Weights to Force Standards The mass of a body relates to the amount of material it contains. Forces are defined by Newton's second law of motion as expressed in the equation: F = ma Since it is impractical to make an accurate determination of force directly from this equation - at least as a […]
