This could indicate that there is either something open letting in a considerable amount of air or the vacuum pump is not turned on.
To troubleshoot this issue, I recommend following the steps outlined in the video below. It will guide you through the process of checking for any air leaks or problems with the vacuum pump.
Please watch the video and follow the steps to identify and resolve the issue.
If you still cannot achieve pressures below 2500 mTorr after following these steps please reach out to our Customer Support team for further assistance on this issue.
