[volt-nuts] Resistance Standard Oil - Plain Mineral Oil?

[Mitch Van Ochten]

Hi Joe,

I just ordered it today. Might have been foolish to spend so much on mineral 
oil.
ESI recommended "Drakeol 9 LT mineral oil" in their literature but I 
couldn't find it in small quantities.
I investigated a synthetic oil replacement called SpectraSyn PAO and Exxon 
offered to send a sample.
After checking with a chemist at work I decided not to.
He said over many years of immersion the "long chain parrafin" would be the 
best, and
less likely to deteriorate the insulation than a synthetic replacement.

I suspect someone may have substituted motor oil in your other resistor.


Regards,

mitch


----- Original Message ----- 
From: "J. L. Trantham" <jltran at att.net>
To: "'Discussion of precise voltage measurement'" <volt-nuts at febo.com>
Sent: Friday, November 25, 2011 9:32 PM
Subject: Re: [volt-nuts] Resistance Standard Oil - Plain Mineral Oil?


> Thanks for everyone's reply.  If all it takes is just plain old Mineral 
> Oil,
> I can get that easily at the local grocery or drug store.
>
> Mitch, have you received the Drakeol yet?
>
> I also have a Leeds & Northrup 0.1 ohm and a GRAY Inst. Co. 10000 ohm
> Standard Resistor, both of which came with oil.  Their oil, though, is 
> very
> dark with quite the odor.  Somehow, I don't think plain old Mineral Oil is
> quite the same.  If it is an acceptable substitute, I can certainly get it
> very easily.
>
> I had always thought the oil was as much for elimination of moisture as it
> was for insulation.  Also, of course, it seems to be for the purpose of
> adding some 'thermal mass'.
>
> Joe
>
> -----Original Message-----
> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
> Behalf Of Mitch Van Ochten
> Sent: Friday, November 25, 2011 7:43 PM
> To: Discussion of precise voltage measurement
> Subject: Re: [volt-nuts] Resistance Standard Oil - Plain Mineral Oil?
>
> Joe,
>
> I just ordered some Drakeol 7 from this company:
>
> http://www.cqconcepts.com/chem_mineraloillight.php
>
> It's $12.23 per quart and they take PayPal.
>
>
> Regards,
>
> mitch
>
> ----- Original Message ----- 
> From: "J. L. Trantham" <jltran at att.net>
> To: "'Discussion of precise voltage measurement'" <volt-nuts at febo.com>
> Sent: Friday, November 25, 2011 1:17 PM
> Subject: [volt-nuts] Resistance Standard Oil - Plain Mineral Oil?
>
>
>>I have looked back over the archives about this and have found some
>> information but I am not really clear on whether or not local grocery or
>> drug store mineral oil is acceptable for my Leeds & Northrup 10 ohm
>> standard
>> resistor.
>>
>>
>>
>> I emailed Ohm-Labs (that I think maybe acquired Leeds & Northrup?) and
>> they
>> suggested Drakeol 7 or Blandol.  However, I can't find a source for it.
>> They suggested Fisher Scientific or VWR but I can't find either brand
>> listed
>> on their websites.  They do list 'light mineral oil'.
>>
>>
>>
>> Any information or suggestions appreciated.
>>
>>
>>
>> Joe
>>
>> _______________________________________________
>> volt-nuts mailing list -- volt-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>> and follow the instructions there.
>
>
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.