testo 557s testing manifold for vacuum leaks. overnight vacuum decay test
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testo 557s vacuum decay test using the bluetooth testo 552i. why u don’t use refrigerant hoses
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pt:5 testo 557s passed vacuum decay test. decay up to 200 micron after 4 hours
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testo 557s another new failure 😣 you got to be joking testo !?. importance of micron gauge.
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after 12 hours of vacuum decay test testo 557s & refrigerant hoses.
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pt:3 testo 557s overnight vacuum decay test.
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saved customer from ac pro !!!who wants to see a testo 557s fly 🦅 off a building?
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testo 557s senses constantly dropping in and out. my second replacement testo 557s
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2ed video update testo 557s refrigerant gauge low side passes nitrogen pressure decay test.
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vacuum decay test performed correctly what will your results look like. like this
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2:47
vacuum decay test with refrigerant hose will always fail !!!!…. dry is the secret 🤫 
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application video testo 550s 557s leak test | be sure. testo
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what a vacuum decay test looks like with no vacuum leak. just a little moisture left in the system
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testo 557s using the pressure leak test set up. do not ! use refrigerant to perform a leak test.
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pt:9 testo 557s passes vacuum decay test with flying colors.
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testo 557s pressure zeroing drifted low well it was on the vacuum pump. fieldpiece to the rescue
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4:16
3rd leak detection for the testo 557s failing nitrogen decay test. (it’s the hose seal)
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add heat to this vacuum decay test. what expected results will happen ? simple physics
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pt:7 testo 557s refrigerant gages deep vacuum test after silicone grease applied to o-rings
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why you do not want to use refrigerant gauge manifold and refrigerant hoses poor vacuum decay test
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testo 557s refrigerant manifold, testo 552i wireless vacuum probe micron meter, phone app