Big News: Morehouse Training, Sessions, and Presentations at NCSLI 2018 in Portland August 26 - 30
Another year and another NCSLI conference are soon approaching. This year both Henry Zumbrun and Edward Lane will be headed out to NCSLI. I will be teaching two tutorials on Monday, August 20th, presenting some torque wrench PT findings and discussing them at the Airline Committee meeting as well as presenting information on our uncertainty propagation paper at the Session 5A session. Ed and I will be at the Morehouse booth 400 the rest of the time, and we certainly hope several will stop by and say hello. Below is more detailed information on what to expect including Morehouse giveaways.
Come to see us at Morehouse Booth # 400 and pick up our giveaways as we shipped them to NCSLI and do not wish to pay to ship them back :).
Special T-Shirts Commemorating believers in a non-flat Earth at NCSLI
Giveaway #2 Morehouse Fidget Spinner
T-23 | Monday, August 27 | 8:00 AM - 12:00 PM | 1/2-Day AM (4 Hours) |Rm: D139
Course Title: Force Calibration
Instructor: Henry Zumbrun, Morehouse Instruments
NCSLI Course Description: Applied force calibration techniques will include live demonstrations using secondary standards to exhibit potential measurement errors made in everyday force measurement. The measurement errors demonstrated and discussed will include errors associated with improper alignment, use of different and/or incorrect adapter types, thread depth, and thread loading as well as some load cell troubleshooting techniques. We will also cover the importance of calibrating force measurement devices in the manner they are being used to reduce measurement errors and lower uncertainty. Recommended skill level for the course is anyone who has experience with force equipment and wants to learn how they can minimize potential measurement errors. Using the material provided in the training, students will be able to put together an expanded uncertainty budget for force equipment used as secondary standards.
Learning Objectives: 1. The student will be able to identify potential force measurement errors and be able to reduce and/or quantify the uncertainty associated with these errors in their uncertainty analysis for force measurement in their calibration facility.
- The student will leave with the ability to implement proper force calibration techniques as discussed and demonstrated in the class.
- They will also be able to identify various types of calibration equipment and perform some basic troubleshooting methods.
T-29 | Monday, August 27 | 1:00 PM - 5:00 PM | 1/2-Day PM (4 Hours) |Rm: D139
Course Title: Fundamentals of Torque Calibration
Instructor: Henry Zumbrun, Morehouse Instruments
This presentation is a review of the fundamentals of torque calibration. Topics include an overview of torque standards including ASTM-E2428, the uncertainty of torque calibration standards, uncertainty discussions, torque calibration equipment, calibration and testing of torque transducers, proper calibration techniques, error sources associated with torque calibration, and why proper torque measurement is more than just a traceable length and mass calibration. This segment will cover torque transducers as well as proper torque wrench use. There will be a “hands-on” demonstration on how to properly use a torque wrench and the errors associated with improper handling. This segment is intended for those who are involved with torque calibration, those wanting to minimize the errors associated with improper use of torque equipment, and for those who have questions that need to be answered.
Airline Committee Meeting #154| Tuesday, August 28 | 5:30 PM - 7:00 PM | Rm: E147
Presentation Topic: Guard Banding Method 5 Versus Method 6 with some preliminary Torque Wrench PT results
- Test Uncertainty Ratio (T.U.R) and What This Means
- Method 5 versus Method 6
- Comparing Preliminary PT results using these Methods
Wednesday, August 29, 2018
1:00 PM - 2:00 PM
5A — Mechanical Measurements |
Fundamentals of Dynamic Force Metrology
Nicholas Vlajic, National Institute of Standards and Technology (NIST)
Uncertainty Propagation for Force Calibration Systems
Henry Zumbrun, Morehouse Instrument Company
There are several labs operating throughout the world, which does not follow a designated guideline for calculating measurement uncertainty for force calibrations done in accordance with the ASTM E74 standard. Realizing the need for a guidance document, Morehouse decided to draft this document explaining how to calculate measurement uncertainty and how uncertainty propagation for force calibration systems works. The document examines uncertainty contributors for different tiers in the calibration hierarchy. We start with tier-one laboratories using primary standards which are dead-weight machines and work through the uncertainty propagation through tier-two or secondary laboratories and then tier-three laboratories.
Calibrations, repeatability studies, and other tests were performed at each tier using different types of force calibration equipment. The paper follows the uncertainty progression and answers the question of what type of calibration standard and Calibration and Measurement Capability (CMC) is needed to achieve a specific Calibration and Measurement Capability at the next tier. Through examining the various uncertainty contributors, we arrive at the conclusion that several force scopes may not be realistic in their CMC claims which means they may not be able to make statements of conformance. The testing proved the importance of the reference standard in relation to overall expanded uncertainty. Deadweight primary standards are predictably the best possible reference standard. A laboratory using secondary standards—those standards calibrated by deadweight—can achieve CMCs as low as 0.02 % of applied force if they are using several standards.
Nonetheless, the downside of using several standards is that this method involves standards being changed at least once during the calibration which often further impacts test results. Failing to account for all the uncertainty contributors at any tier and not calculating Calibration and Measurement Capability properly will influence the Unit Under Test (UUT) in several ways resulting in lower combined uncertainties and raising measurement risk levels on all instruments in the entire measurement chain.
Again, we look forward to seeing whoever can attend NCSLI. Please feel free to attend or sign up for any of these tutorials, or sessions, or stop by the Morehouse booth # 400 to say hi.
In everything we do, we believe in changing how people think about force and torque calibration. We challenge the "just calibrate it" mentality by educating our customers on what matters, and what causes significant errors, and focus on reducing them.
Morehouse makes simple-to-use calibration products. We build awesome force equipment that is plumb, level, square, and rigid, as well as provide unparalleled calibration service with less than two-week lead times.
Contact us at 717-843-0081 to speak to a live person or email firstname.lastname@example.org for more information.