Model 248 Earth Ground

[Ben_UNT]

I apologize if this is a trivial question but why is there no earth ground connection on the back panel of the model 248 high voltage power supply? I understand that the device under load should have a grounded safety shield during operation but I don't get why the power supply is not grounded too. I am using this power supply for field emission experiments and I don't want to damage it with arcing. What are you recommendations for this issue?
Thanks

[Jane S]

Hello,
The 248 has an OVP circuitry to avoid arcing.

This is explained in the datasheet (Model 248 High Voltage Supply and Technical Information - DC Power Supplies)

See link below;
http://www.keithley.com/support/keidoc_ ... Data+Sheet

In addition, the E-handbook there's a number of applications for additional information.

http://www.keithley.com/support/keidoc_ ... e=Brochure

I hope this helps.

Jane