- Understand which technologies are best for ultimate digital vacuum gauge accuracy,
- ensure that the gauge they are using has no fatal flaws in the underlying technology upon which the gauge was built, and
- pick a gauge manufacturer that has a practice of properly calibrating each and every gauge to the NIST standard before it leaves the factory.
WHAT IS THE ULTIMATE TEST OF ACCURACY?
The ultimate test of accuracy is how well a gauge tracks with a calibrated standard before and after it has been in the field. There are a lot of specsmanship games that can be played with accuracy of a gauge. It can be broken down into components, some of which are able to be adjusted for with a simple zero and span calibration. Others, like repeatability and non-linearity, are somewhat irreducible.
OTHER DIMENSIONS IMPACTING ACCURACY
For measuring medium vacuum, the extreme accuracy of thermocouple technology has been concretely proven in the lab. Additionally, thermocouple exhibits few of the variances found in other electronic gauges.
Related Blogs: Understanding Vacuum Measurement: Key Terms