Category: Force Calibration Tips

How to Participate in an Interlaboratory Comparison (ILC)

Many force calibration laboratories need help proving out their measurement capability. The ISO/IEC 17025:2005 listed interlaboratory comparisons (ILCs) in section 5.9.1. However, historically ILCs were not organized or completed because other less complicated methods were acceptable for monitoring the validity of the results. The current ISO/IEC 17025:2017 standard still has the requirements of 5.9.1 in […]

Why don’t my force measurements match my calibration report?

You send your load cell out for calibration. When it returns you begin using the load cell, but notice that your measurements don’t agree with what the calibration lab reported. Why is there a discrepancy? This question has been posed to us in slightly different ways from many different companies. After looking into multiple scenarios, […]

3 Ways to Prevent Damage to your Force Calibration Equipment

The purchase of force calibration equipment coupled with the calibration cost can be a large investment. Good, quality equipment provides a steady return on your investment for many years. Unfortunately, we see a lot of equipment damage such as broken connectors, severed cables, damaged load cell threads, damaged meters, broken dial faces, water damage, broken […]

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, […]
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