[volt-nuts] [Bulk] Re: [Bulk] Re: Solartron 7081 noise

[J. L. Trantham]

Just walked into the shop and the meter was on all day with the input 
shorted via my 'home made' test lead set.  It was incredibly stable sitting 
at about 1.5 uV +/- about 0.05 uV.

Perhaps leaving it on for the duration is having a beneficial effect at 
driving out moisture or other contaminants.

Now the question is whether or not it would remain stable after turning it 
off for a week or two then turning it back on.

Joe


----- Original Message ----- 
From: "m k" <m1k3k1 at hotmail.com>
To: <volt-nuts at febo.com>
Sent: Monday, September 12, 2011 1:22 PM
Subject: [Bulk] Re: [volt-nuts] [Bulk] Re: Solartron 7081 noise


>
> The solder with the lowest seebeck effect is solder containing some 
> cadmium, not easy to get hold of, otherwise they are all similar.
>
>> From: jltran at att.net
>> To: timka2k at yandex.ru; volt-nuts at febo.com
>> Date: Mon, 12 Sep 2011 07:49:08 -0500
>> Subject: Re: [volt-nuts] [Bulk] Re:  Solartron 7081 noise
>>
>> Mickle,
>> '
>> I got the emulation program, figured out how to make it work ('Custom' 
>> baud
>> rate and '300' in the space below) and was able to save a file.  Now to 
>> get
>> Excel on my shop computer and figure out how to turn data into a graph.
>>
>> Just shorting my leads and watching, it is somewhat variable but 
>> primarily
>> 0.000 000 00 +/- 2 to 3 uV on the 0.1 V scale.  Seems a bit noisy but I 
>> have
>> no experience with meters this sensitive.
>>
>> I also have an issue with the front panel connector that I think is just
>> wear and tear on the connector.  I have ordered a replacement but it will
>> not be here for several weeks.
>>
>> When I install it, should I use silver solder?  Or is just attention to
>> detail when it comes to removing the flux the main issue?
>>
>> Joe
>>
>> -----Original Message-----
>> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
>> Behalf Of ??????
>> Sent: Sunday, September 11, 2011 12:16 PM
>> To: volt-nuts at febo.com
>> Subject: [Bulk] Re: [volt-nuts] Solartron 7081 noise
>>
>>
>> Hi, Joe!
>> Serial number of my S7081 is 000236 - one of the first models, that lack 
>> of
>> some minor improvements in the Input Amplifier and DC/AC Ranging. I'm 
>> using
>> a simple freeware serial port terminal emulation program "Terminal v1.9b"
>> https://sites.google.com/site/terminalbpp/ I'm save all the output to a 
>> log
>> file, cut out the header and ending, then rename it to "CSV" standart 
>> EXCEL
>> extention. That's all!
>>
>>
>> Mickle
>>
>>
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