[volt-nuts] Writing meter

[Fred Schneider]

Because they are nice ;-) 
but a digital datalogger is also on the stack. A friend who is a digital wizzard, but still a student on a budget wants a 6.5 digit meter so he is just finnished making two very good 24 bit ADC's ( they are 26 bit but functional 24 bit or something like that) coupled to arduinos and is writing the software.  I gave him a 2445 scope i had surplus as a "payment"  and I make the Vrefs for it and will do my best to get them as good calibrated as possible so we both have a nice meter.

Fred PA4TIM

Op 10 sep. 2011 om 16:41 heeft "WarrenS" <warrensjmail-one at yahoo.com> het volgende geschreven:

> Fred
> 
> I can only guess why you would want a mechanical Writing meter.
> Have you ruled out a simple 8 Plus bit ADC data logger connected to a PC such as a 10 BIT DATAQ which are/were? $25 new?
> Or if your application needs 16 bit resolution which is not likely due to the limitations of the 845, then a $5 sound card, modified for DC.
> 
> ws
> 
> *******************
> [volt-nuts] Writing meter
> Fred Schneider pa4tim at gmail.com
> 
> I want to buy a writing voltmeter to connect to my 845 so I can monitor the deviation between a Vref i made and a fluke calibrator.
> 
> I can buy a philips PM 8252 or a BBC Goerz Servogor 120.
> The BBC is including new pens and a few rolls of paper in mind condition and 125 euro.  The philips is in unknown condition but 65 euro.
> But these things are new for me. A friend told me some are for process monitoring and have terrible slow slewrates. He thinks the philips is a lab instrument, the bbc he does not know.
> 
> Fred 
> 
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