# Beamex Blog

Learn about temperature, temperature scales, temperature units and temperature unit conversions.

It’s a jungle out there!

There is a lot of different pressure units in use around the world and sometimes this can be very confusing and may cause dangerous misunderstandings. In this blog post I will discuss the basics of different pressure units and different pressure unit families.

In this post I continue on the topic of calibration being “Out of Tolerance” (OoT) or “Failed”.

“Out of Tolerance” (OoT) means that during a calibration some calibration point(s) failed to meet the required tolerance level. This causes the result of the calibration to be out of tolerance, or as often also referred to, that it was a failed calibration.

What is metrological traceability in calibration and how can you be traceable?

In calibration, the metrological traceability is a fundamental consideration. If the calibrations you perform in your plant are not traceable, you don’t know if they are correct or not and therefore there is really no point in doing them.

In this post we discuss the following scenario: You have done the calibration, have the results on the certificate and you compare results to the tolerance limits. It’s time to pop the big question: Is it a Passed or Failed calibration? Or is it In or Out of Tolerance?

Calibration out of tolerance – ready to hit the Panic button?

In this post we are talking about calibration being “Out of Tolerance” (OoT).
When you calibrate something and the result is a “Fail”, then it is an Out of Tolerance-situation.
But it’s not all that simple - there is more to it and more things to be considere
d.

Figure 1. Standard deviation

This is the second blog post (out of three) continuing on the subject of calibration uncertainty. In the first blog post we discussed the basics; how important it is to be aware of the uncertainty, short terminology and the classic “piece of string“ example.  If you missed the Part 1-blog post, you can find it here. If you want to get all the parts at once, feel free to download the related full white paper from the link below:

The oil and Gas industry in the North Sea has been hit by a Perfect Storm – the rapid fall in the price of oil to levels less than the average extraction cost has resulted in the delay or cancellation of a huge number of investment projects.

If you don’t know the measurement uncertainty, don’t make the measurement at all!