Hello Colleagues,
i have bumped into one of those things "not mentioned in the test standard... that should be" and would very VERY much appreciate your input.
so, maybe 6.4.11 inst exactly worded for my particular case but i dont seem to find it anywhere else in the standard, so... to get to the point at hand:
I am in charge of a test lab that runs tests on fan cooled electric equipment, and Test site altitude DOES affect thermal equilibrium results on said equipment*, but current "certifiable" standards make no account for altitude corrections... the IEEE standard from which the aforementioned "other" standards were born DOES mention (briefly) a method to correct the temperature rise obtained from the tests, and also the IEC equivalent standard (uses a fancier formula but ends up with the same results for correction factors) now, to reiterate, we are accredited for national and international standards derived from these two main standards , but none of my accredited methods take into account these correction factors.
i am not sure how should i approach this to get to apply these correction factors and have my acceditation bodies to accept this "method deviation" (i'd like to avoid using that particular term if possible), does this really consist of a method deviation?... test method would be exactly as required by the standard but the result would be "corrected" for test site altitude
how do calibration labs approach these situations, im sure it happens right?
*This is due to the change in air density at different altitudes
i have bumped into one of those things "not mentioned in the test standard... that should be" and would very VERY much appreciate your input.
so, maybe 6.4.11 inst exactly worded for my particular case but i dont seem to find it anywhere else in the standard, so... to get to the point at hand:
I am in charge of a test lab that runs tests on fan cooled electric equipment, and Test site altitude DOES affect thermal equilibrium results on said equipment*, but current "certifiable" standards make no account for altitude corrections... the IEEE standard from which the aforementioned "other" standards were born DOES mention (briefly) a method to correct the temperature rise obtained from the tests, and also the IEC equivalent standard (uses a fancier formula but ends up with the same results for correction factors) now, to reiterate, we are accredited for national and international standards derived from these two main standards , but none of my accredited methods take into account these correction factors.
i am not sure how should i approach this to get to apply these correction factors and have my acceditation bodies to accept this "method deviation" (i'd like to avoid using that particular term if possible), does this really consist of a method deviation?... test method would be exactly as required by the standard but the result would be "corrected" for test site altitude
how do calibration labs approach these situations, im sure it happens right?
*This is due to the change in air density at different altitudes