Key References:
Start from HERE:
- A Beginner’s Guide to Uncertainty of Measurement. Volume 11 of Measurement Good Practice Guide. Author Stephanie Bell. National Physical Laboratory, 2001
Type A Uncertainty:
- ISO/IEC Guide 98-3:2008 (GUM): This guide provides statistical methods for evaluating Type A uncertainty, including calculating standard deviations.
Type B Uncertainty:
- ISO/IEC Guide 98-3:2008 (GUM): This guide also explains how to evaluate Type B uncertainties derived from sources such as instrument tolerances or environmental factors.
- NIST (National Institute of Standards and Technology): NIST provides extensive resources on estimating uncertainty from instruments, calibration, and other factors.
Combining Uncertainties:
- ISO/IEC Guide 98-3:2008 (GUM): “Guide to the Expression of Uncertainty in Measurement”
- NIST Technical Note 1297: “Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results”
Pages:
Have you participated in any inter-laboratory comparison (ILC) or proficiency testing to validate the accuracy of your methods? If not, do you have plans to?
We just finished EMI PT testing, and I am waiting for noise testing PT to begin.
We cannot find any PTs for efficiency and fan performance, so we will coordinate something with a manufacturer. The ISO provides this capability if you cannot find a PT category. We frequently also compare our results with those of the factory and other labs, but as you know, the 17025 asks for PTs and not just any lab.
Now your laboratory is accredited, and you have an ISO/IEC 17025 certificate? You might be the first hardware reviewer who is legitimate.
Our lab works under ISO 17025 for quite some time now. We have our system implemented several years ago, based on our knowledge and through some external consultants we hired.
We will have the first inspection in the following months, and we also applied for ISO 17065 which will allow Cybenetics to enter Energy Star. We would obtain 17025 years ago, but we moved the lab 2x times in the last two years. Now that we bought the damn building, we go full speed to it!
To get ISO 17025, you must operate for at least six months under this ISO’s guidelines. We operate for many years under that since this is the way.
This kind of ISO I am afraid is NOT for reviewers because it is too complex, too expensive and requires a crazy tight system. If there wasn’t Cybenetics I would never be able to even think of it. Basically Cybenetics gets it. HWbusters just uses Cybenetics data 🙂
Into this year we will get the cert, we DONT have it yet. We filled the application in December 2024 and we are waiting for the first pre-inspection in the next month (hopefully). My goal is to have both ISOs within 2025 (17025 and 17065)
Wow! Impressive