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Thread: Vacuum condition problem
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28-02-2016, 12:01 AM #1
Vacuum condition problem
Hello all i just bought vacuum gauge Testo 552 and connect it to vacuum pump and Testo 550.
So when i start to pull the vacuum is ok, after that I close the valve on the Testo 550 to isolate the pump and I turn off the pump.
So all the measurements which i can see are from the vacuum between the Testo 550, ribber hoses and Testo 551
As you can see from the video which i took the vacuum is not stable and when i close the valve from the T550 vacuum level going more weak (rise up).
Here is the video
https://www.youtube.com/watch?v=bkkVvEiyw5o
PLease let me know why is that happen?