[volt-nuts] Best cleaning procedure for precision cirquits

[Randy Evans]

Separate from cleaning flux off a board, what is the best solvent/cleaning 
agent for removing dirt and grime from a board and compnents for the lowest 
leakage currents; e.g., for a picoamp measurement system with very high value 
reistors?

Thanks,

Randy Evans



----- Original Message ----
From: Chuck Harris <cfharris at erols.com>
To: Discussion of precise voltage measurement <volt-nuts at febo.com>
Sent: Mon, September 27, 2010 3:18:27 PM
Subject: Re: [volt-nuts] Best cleaning procedure for precision cirquits

I don't like denatured alcohol.  They add a little methyl
alcohol, which is very poisonous for skin contact, ingestion,
and breathing.  Also, it is rather corrosive.... and worst of
all, it leaves behind a white powder when it dries.

If you really want to use ethanol (the base for denatured alcohol),
buy it from the liquor store.

Aerosol cans of "compressed air" are really filled with anything
but air.  They used to be filled with freon, and then later butane,
NO2, and finally CO2.

-Chuck Harris

Andreas Jahn wrote:
> Hello all,
>
> thanks for the many informations and proposals.
>
>> From Your proposals I think the most interesting for my capabilites are:
>
> - the isopropylene alcohol
> - and the "Kontakt LR" cleaner
>
> both for the last (3rd?) cleaning stage since the denatured alcohol is
> much cheaper.
>
> And I have learned that I should get some aerosol cans with compressed
> air for drying the cirquit.
>
> with best regards
>
> Andreas
>
>
>
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