[volt-nuts] Screws in bottom of 3457A

[John Phillips]

If you are sending it in you could just tape the cases halves together and
let them replace the screws. You may want to check with them about it but I
would be more surprised than not if they charged you for it.

On Sat, Jun 10, 2017 at 4:46 PM, Jerry Hancock <jerry at hanler.com> wrote:

> John, I measured the threads to be metric at .7mm pitch.  I believe it to
> be an M4 x .7 x 49mm though most likely a 50mm will work or even a 48mm
> (length).
>
>
> > On Jun 10, 2017, at 3:02 PM, Chuck Harris <cfharris at erols.com> wrote:
> >
> > HP has been metric for years.
> >
> > Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
> >> I've done something rather stupid with my 3457A. I took it apart to
> replace
> >> the battery, and then seem to have mislaid the screws that hold the
> thing
> >> together. As far as I can see, there are 4 screws in the base. The
> problem
> >> is, I don't know what type they are. Could anyone with a 3457A tell me
> the
> >> type - a photo with dimensions on emailed to me would be great. I'm
> >> guessing these will be an American thread of some sort. I can get these
> in
> >> the UK, although not quite as readily as metric. But of course its
> >> difficult if you don't know what you want.
> >>
> >> FWIW, I decided not to change the battery. Having visited Keysight in
> >> February, their cal lab manager said if I asked for it, they would check
> >> the calibration of the instrument before replacing the battery, then
> >> replace the battery at zero cost*, then calibrate it. So I would get
> before
> >> and after data anyway.
> >>
> >> * This assumes the battery is not very expensive. If the battery was
> >> expensive, I'd have to pay for the battery.
> >>
> >> My 3457A has not seen a cal lab in a couple of decades, so I think it
> >> deserves a check over.
> >>
> >> Dave
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-- 

*John Phillips*