33K6-4-427-1

[cs137]

Being an ex navy IM we always excercised our Standards and our TI's. This way if your Standard or TI has problems during excercising you can nrts or reject if nessasary check for leaks etc.. before getting into calibration. For example if you were calibrating an KNC 3112 you could very easily slam the low side and crush the bourdon tube if the blocking valve wasnt set right. And you would see that in exercising if someone before you jacked it up. Trust me, it can and has happened alot. If you follow the T.O. you cant go wrong.

[deerhunter]

I'm interested in knowing what the root cause would be InLikeFlynn and Velasco would try to use in explaining why their non-exercised pressure gage failed the MLC audit, and in turn caused their lab to not be certified.  Then try to explain to the auditors that you didn't follow the T.O. because you are a hot-sh!t PMEL tech who knows more about the equipment, how it should be used, how the user uses it, how it should be calibrated, and more than the AFMETCAL TCM who rejected your AFTO 22s to remove the exercising option because you are a friggin moron.

Air Force calibration intervals are established so that 85% of the test equipment coming back for calibration will still be in tolerance.  So if you don't want to exercise it, why don't you use your same level of integrity and just put your stamp on the cal label without even checking it?  You have an 85% chance it will be good, you really don't want to calibrate it according to the T.O., go ahead...hot stamp it.  That's what you are really doing anyway; when you don't follow the T.O.

[MIRCS]

All you have to do is look at what all the gage manufacturers have as calibration procedures. Look at some specifications.....the ones that say +/- 1% Full scale after being taken to full scale...1, 2, or 3 times. Look at never doing hysterisis checks on gages.......alot of manufacturers have additional accuracies for hysterisis and repeatability.....so a 1% gage might really be a 1.25% gage and people are calibrating these gages at a tighter tolerance than what the manufacturer states.

[Phys_dim]

You know, I was going to post something very informative, but it was semi-rude and would not have helped the process here....and from reading a past post...I'm told that I am too uptight...or something like that, so I decided to....condense the whole thing for everyone. 

Prove to me a better way of doing it (taking into account the approximately 3543 P/Ns, oh and let's not forget 6-428, 6-430, and the rest of the T.O. that have analog gauges in them...Test Cell so on and so forth), along with ALL the PMEL labs personal....and I'll see if I can get this fixed, just remember, you have to follow all the rules of AFMETCAL TO Guide & Requirements, PHY-12_33L1-4-3961_Pressure-Gages, and Mil-Prf-38793B...along with the BIO STYLES guide and about 8 or 10 people here....

It can be fixed,  don't complain about it, give me examples that I can use as ammo...and GOOD usable information to FIX it, and I might be able to help...heck...give me reliable manufacturers data that doesn't conflict with itself.

and remember...you are NOT the PMEL police...keep your lab coat on, enjoy the climate control, and let the wrench turners do whatever they do, right, wrong or indifferent, if they screw up, it will be no reflection on YOUR integrity!

[docbyers]

keep your lab coat on, enjoy the climate control, and let the wrench turners do whatever they do, right, wrong or indifferent, if they screw up, it will be no reflection on YOUR integrity!

Well said!

In the lab, we do it by the book.  Sometimes the book is stupid, sometimes whoever wrote it don't speaka too gooda English, sometimes the book makes no sense at all.  But we do it by the book.  I have no control over what happens to the gear when it leaves my bench, but when it leaves my bench, it works as advertised, guaranteed.  ...and if I can't fix it, it aint broke.

[skolito]

As a calibration tech(14 years exp) And I know that a lot of you have more exp than I but I can tell you that on a 2% or worse pressure gages exercising the gage will NOT have any effect on the performance of that gage, because you are talking about a gross number, most gages will not read down to the accuracy listed and will have to be taken out to one division  (100 psi X 5 psi div, with a tol of ±2% the best readable is ±2. 5psi or 1/2 div.  read 33k6-4-428-1 p3. 2 ) of course this is using dead weights not APC"S (just bought one and I can't for the life of me figure out why I didn't sooner) However on the "TEST" gages you will see an error on the gage and it should be exercised and cleaned before cal depending on the range of course.