Agilent 34401a Maximum voltage between common and chassis ground

[MarkKn]

I work with tube gear that has voltages going up to 600 volts. I am looking at getting an agilent 34401a and after reading the specifications in the manual a couple of times, I can't locate the maximum voltage the unit will tolerate between the common measuring point and chassis ground. The closest thing I can find in the manual is 'Input protection 1000 volts." Does anyone know what that voltage might be? Or maybe the common is tied to ground. Maybe this max voltage spec has a name that I am not aware of. It strikes me as a pretty important thing to know about a meter unless one always has the common lead at ground potential.

Currently (pun?) I use a fluke 87v to measure voltages where the common is in the realm of 600 volts--for instance across a series resistor to determine the current passing through. In any case, I have some interest in a34401a as it appears to be beloved and quite accurate.

Any help is appreciated.

[switchabl]

On mine it says 500Vpk max.

[bdunham7]

500V_PK, so not quite what you need.

Many bench meters don't have the same voltage capabilities as good handhelds.  For example, most won't do 1000VAC.

[MarkKn]

Thanks! Here I am looking in the manual and the answer is right on the faceplate. o:

While 1000v isolation would be great for me, I don't expect bench meters to be like that. I do want to know the design limits of a device so I don't brick it. I can still use this sort of meter for tube work, and 500 volts covers almost everything except for the power tubes. At the very least, one can measure the voltage on both sides of the resistor and subtract...