chemist23 wrote:
When I pump down from the MS (as soon as I turn the power on) ,it shows turbo speed 100% but pump status "not up to speed" and turns off the foreline pump after about 7 mins.
What is going on?
I plugged the transfer line and the ion gauge show 3 x10-5 torr
When I pump down from the software, the MS can only reach 70% turbo speed, then foreline pump turns off.
Any reason for the differences and why pump down cannot remain?
You have a leak problem. Then first of all adjust the mechanical pump connection. Change the o-ring of the vent valve and adjust this valve very well (The o-ring is the same for the injection port liner) When you adjust the side plate of the equipment do not do it with the screws, let the vacuum itself do it.
Disconnect the power cable from the mass spectrometer and the mechanical pump and connect these two to turn on the mechanical pump only for about 10 minutes, verify that there is enough vacuum to hold the sideplate adjusted with vacuum. You turn and connect the cables as usual and turn on the equipment. Please tell how you are doing with those tips.