Category: Force Calibration Tips

Calibrate your Tuffaloy Weld Force Gauge for Quality Spot Welding

A weld force gauge accurately measures the actual weld force at the weld. It is important to calibrate these instruments because a weld force that is too low or too high will cause problems such as cracking, indentation, expulsion, and low weld strength. Most spot welding equipment does not monitor force, which is essential to […]

4 Steps to Reduce Beginning and Ending Zeros

At Morehouse, we generate calibration reports that follow the ASTM E74 standard. When customers try to replicate the data, they often ask how we reduced the zeros from the raw data. This blog explains Method A and Method B zero reduction per ASTM E74. Morehouse recommends Method B, which reduces both the beginning and ending […]

Tips from the Cal Lab: How to use an Alignment Plug for Compression Calibration Setups

Centering a load cell is critical to obtaining the correct line of force and reducing calibration errors. An alignment plug along with an adapter plate can be used to center a load cell, whether it is a reference standard in a calibrating machine or a unit under test. Why use an Alignment Plug? No matter […]

Aircraft and Truck Scale Calibration Tips

Figure 1: Example of Aircraft Weighing Aircraft and Truck scales come in all different shapes and sizes and typically serve one purpose, to approximate the weight of an aircraft or truck. Why might that be important? For Aircraft's it's about knowing the center of gravity CG. The center of gravity will influence stability and performance. […]

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 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 […]

What Makes a Force Calibration Machine Fit for Use?

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 is the rigidity of the machine, how plumb the weights are, […]

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

Morehouse Benchtop 10,000 lbf Calibrating Machine When metrologists talk about measurement error, we’re talking about the difference between the nominal value and what the instrument is reading. If 10,000 lbf is applied to a force measuring device and the readout displays 10,002 lbf, then the device has a 2 lbf bias. If we load the […]

Proving Ring Tare Load Correction Proof

This blog post is on the strange side. I was rummaging through some of the work I did back in 1999 and found a tare load correction proof. I probably never published it as we were all waiting for the world to end at the turn of the next century. When the world did not […]

Calibration Intervals - When is it time to recalibrate?

Since I became involved in the calibration industry in 1972, the calibration interval has been a common topic of interest and confusion.  I was asked to write an article for the newsletter & blog, and after some thought, I determined there was no need.  Many people have published excellent content on the subject: One of the best […]
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