Important 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, it's about knowing the center of gravity CG. The center […]
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 […]
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 […]
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 […]
Morehouse ISO 376 Calibration Certificates Morehouse has been performing ISO 376 calibrations for over the last fifteen years. In this time frame, we have changed our ISO 376 calibration certificate format three times. The latest change offers additional information such as a calibration graph per run and is laid out in a way that is […]
How to Calibrate Button Load Cells and Achieve Solid Results How to Calibrate Button Load Cells - Intro Anyone who has tried calibrating button-type load cells knows they do not repeat well in the rotation. The sensitivity to off-axis or side-loading conditions is quite high. High enough that 0.1 % of misalignment will produce a […]
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 proving ring tare load correction proof. I probably never published it as we were all waiting for the world to end at the turn of […]
Why the Location of the Measurement is More Important than You May Realize Calling an instrument “In Tolerance” is about the location, location, and location of the measurement. It’s also about the uncertainty of the measurement, but a bad location will raise the Probability of False Accept (PFA) significantly. The Probability of False Accept is […]
Calibration Intervals - When is it Time to Recalibrate? Calibration Intervals A calibration interval is the period between two consecutive calibrations of MT&E. This interval is crucial for ensuring that the equipment continues to operate within its specified performance and the claimed Calibration and Measurement Capability (CMC) uncertainty parameter, sometimes referred to as […]
Top 5 Common Force Measurement Errors Top 5 Common Force Measurement Errors - At Morehouse, we strive to replicate the loading conditions a customer may be using. Some other labs, may not follow this process and the additional measurement uncertainty from not replicating use, may create a significant error source. Below are the top 5 […]
Avoid ASTM E74 Load Cell Calibration Mistakes We are writing this post to clarify some common ASTM E74 misconceptions and discuss ASTM E74 Load Cell Calibration Mistakes. We have written two early blogs on the ASTM E74 standard: ASTM E74 Simplified and Calculating CMC using the ASTM E74 standard. We also have a slide share presentation detailing the […]
AC Versus DC (mV/V) Differences in Load Cell Meters Using a Load Cell Simulator Differences in Load Cell Meters - There is a difference in output between Alternating Current (AC) measurements and Direct Current (DC). To show the difference, we used a load cell simulator on two different meters. We used a simulator that […]
