Used multimeter buyer's guide

[ogdento]

Wow, I didn't realize you needed the ac-09 option for ac measurements.

[PixieDust]

Looking at one of the HP multimeters:

https://www.ebay.com/itm/Hewlett-Packard-Multimeter-3478A/121971867492?hash=item1c6616ff64:g:uasAAOSwYmZXI~QP

What's the deal with possible voltages? There's 110V, 120V, 220V and 240V (120V in this case is filled in) are these hard wired to a specific voltage or can it be changed by changing the fuse? Fluke one seem to have selectable voltages on their back. As I type this my electronics noob is probably coming out since a fuse probably can't actually switch anything.

[rsjsouza]

The voltage selection of the HP3478A is a wire that needs to be connected to the appropriate input inside the equipment.
Check the attached excerpt from the Service Manual

[helius]

As I type this my electronics noob is probably coming out since a fuse probably can't actually switch anything.

Well, the fuse holder in some instruments can be rotated to engage different transformer windings for various world voltages. So you wouldn't have been far off, even if this specific instrument does it a different way.

[PixieDust]

Thanks guys.