strange arcing on an input terminal

[Erik smith]

I have this hipotronics 30 c power supply. its -+ 15kv It started working putting out +15 on the positive terminal. Now, when i plug it in it makes this wierd static noise on one of the input terminal (terminal 3 the voltage monitor) and only outputs ~10 kV on the positive ternimal.

What is this? What seems to be wrong with the supply? What should i do to prevent this arcing?


https://www.youtube.com/watch?v=e8ekMarkiIU

[Rich Feldman]

Are you using the VM terminal for anything?
Do you know what it's for, and how to use it?

Thanks for attaching a sharp picture of the yellow label.
Did you notice the only English sentence printed on it?

hipo2.PNG (81.01 KiB) Viewed 3131 times

[Jerry Biehler]

VM is for a volt meter, there is probably just a resistor divider inside and if that is not going to ground full output potential will build up and start arcing. Put a meter on it or ground it like Rich says.