I foud missing , power at beam tube ionizer .
was a diode open , now ion pump current is high .
last calibration was made 20 tears ago , maybe this one was not
operating for long time , due to a fault .
Now I will try to apply 3500 volt as the manual .
And I hope current go low .
I someone had made this procedure may explain me how to do .
regards i5uxj
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