[volt-nuts] 3457A battery replacement at Keysight - not

[Electronics and Books]

You can buy litium batteries at conrad. They have axial wires and fit into allmost all hp , philips equipment. The length is half an aa cel. As the current is so low, only the leakage counts. I never understand why they charge so much for calibration. It is for equipment with a stability of 30 ppm. A good calibrator with voltage and restistance standard give you about 3 ppm. I use fluke 5700 with datron voltage an esi resistance standard. Yes the voltage was calibrated. The resistance is difficult for the reason that only a national standard lab has a better uncertenty. Use to had 2 of these standards and the difference i found was in the order of 0.1 ppm of actual value compared to each other.

Regards
Met vriendelijke groeten,

Frans
info at electronicsandbooks.com
electronicsandbooks.com
Netherlands

discere ne cesses
 
 
  Op vr, mei 25, 2018 om 1:03 schreef Dr. David Kirkby<drkirkby at kirkbymicrowave.co.uk>:   On 24 May 2018 at 23:43, Laurence Motteram <
lmotteram at scientific-devices.com.au> wrote:

> Hello Dave,
>
> Farnell UK have these; http://uk.farnell.com/w/c/
> batteries-chargers/batteries-non-rechargeable?battery-size-code=2-3aa
>
>
> Best Regards,
>
> Laurence Motteram
> Calibration & Service Manager
> Scientific Devices Australia
> Ph: +61 (0)3 9569 1366
> M: +61 (0)425 765 019
> www.scientific-devices.com.au
> lmotteram at scientific-devices.com.au
>
>
Thank you, but I believe they are the wrong size. They are 2/3AA, but the
one needed is I believe 2/3A.  I know what a AA cell is, but I must admit
I've never come across an A cell, but I guess its bigger than a 2/3A.

My biggest concern about buying batteries is getting counterfeits. That's
why I would rather stick with a reputable supplier like Farnell, RS etc.
But I can't find anything local.

http://www.pmbl.co.uk/

look to be battery specialists in the UK, but I have never come across them
before. I have emailed them, along with Panasonic directly. I've said to
Keysight, if they will sell me the battery, I will buy it from them. I know
Keysight is not going to be a cheap place to buy batteries, but given the
difficulty in getting one, I would not mind buying directly from Keysight.
But I am not paying nearly £300 for them to fit a battery.

Dave
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