H2 downstream beamlne vacuum (Torr) low-low alarm.
qw:VcG3H09DTr = 0.00000000, lower than the low-low limit 0.00000001.
The problem persisted for more than 10 min, so I had to page the on-call expert.
But the target repaired itself just at the moment when Silviu called the counting house.
Now everything is fine.
Figure 1
