Morehouse 600K Light Weight Load Cell System for ASTM E4 Calibration of Concrete Machines

February 26, 2019 12:00:00

This blog is going to discuss the Morehouse Concrete Compression Machine Calibration kit and the potential error sources associated with using material with a different hardness than what the system was calibrated with. Morehouse has created a kit to minimize the common compression error sources while providing a lightweight portable solution with an ASTM verified range of forces of better than 400 lbf through 600,000 lbf (660,000 lbf is possible) for calibration of concrete machines to ASTM E4.

Force Measurement Error – Time Interval Between Two Successive Loadings

January 24, 2019 12:00:00

Has anyone ever wondered if there is a difference in calibration results if the time interval between 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 two to three hours at NIST or a comparable lab with deadweight calibration systems?

What Makes a Force Calibration Machine Fit for Use?

December 13, 2018 12:00:00

This blog discusses the most important attributes of great force calibration machines such as being plumb, level, rigid, and square and error sources associated with not having a machine that has these attributes.

Morehouse Versatile Cable Tensiometer and Force-Measuring Instrument Calibrator

December 04, 2018 12:00:00

Morehouse 2,000 lbf Tensiomenter calibrator to calibrate Cable Tensiometers Safely, Load Cells, Crane Scales, Hand-Held Force Gauges, Dynamometers, and More.

How to Calculate the Uncertainty of a Deadweight Primary Standard Machine

September 21, 2018 12:00:00

Any organization that is accredited must account for the uncertainty of their standards. The following are guidelines to assist in calculating the measurement uncertainty for dead weight primary standards.

Automatic Deadweight Load Cell Calibration Instrument for Improved Force Calibration Results

August 23, 2018 12:00:00

This post describes various force standards that are often used to calibrate force sensors and other devices. It discussed in detail the advantages of deadweight machines for the best calibration results. It then goes into detail about what it takes to calibrate a load cell properly.

Morehouse Training, Sessions, and Presentations at NCSLI 2018 in Portland August 26 - 30

August 16, 2018 12:00:00

Morehouse Training at NCSLI 2018 in Portland. We will be teaching two tutorials, one on force and one on torque as well as presenting at Session 5A and the Airline Committee meeting.

Load Cell Stability – How It Can Kill Your Uncertainty Budget

July 13, 2018 12:00:00

Load cell stability can potentially consume your uncertainty budget, cause the force measuring device to be out of tolerance, cause all measurements between the last calibration and the current calibration to be recalled, raise the accuracy specification of the system. This post covers what instability is and ways to potentially reduce instability.

ISO 17025 When Calculating Torque Measurement Error Cosine Error should be considered

June 21, 2018 12:00:00

Some ISO 17025 accredited labs performing torque calibrations may not entirely be considering the effect on the uncertainty from Torque Measurement Error from Applied Force Direction (cosine error)

Using Mass Weights to Calibrate Force Devices Can Result in a Large Measurement Error

May 29, 2018 12:00:00

This blog describes the expected errors from using mass weights to calibrate force measuring instruments such as load cells, crane scales, dynamometers, hand-held force gauges, and tension links. We examine the error in using LBS instead of LBF and vice versa. Gravity is not constant over the surface of the earth. The most extreme difference is 0.53 % and using mass weights for calibration and then using the instrument somewhere else can result in significant measurement errors.