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Here is a much better illustration of the pressure volume loop along with the associated calculation of the WOB. This is from Pete Wolfinger's wonderful Regulator Savvy, which @rsingler reminded me was a great reference for regulator function and adjustment.Thanks @rsingler a very good example. The loop goes from right to left to right. After cracking with a negative pressure, much of the inhalation has a positive pressure, the assist. The entire exhalation requires generating a positive pressure, the contribution to the WOB.
View attachment 786997
The four standard testing levels are discussed in this older thread.
Latest ScubaLabs reg test - huh?
Is "DACOR" back in business? This is news to me. News to me too. It said the company was West Marine which runs retail stores selling boating items here in the US. They must have bought the name from Mares. From what I remember Dacor was supposed to be Mares budget brand but they really didn't...
scubaboard.com
The example from Regulator Savvy appears to be condition #2. The example supplied by @rsingler might have been condition #3, the European conformance standard.