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Date: Sun, 05 Mar 2000 21:11:36 -0700
From: brad gilmore <bgilmore@at*.ne*>
To: techdiver@aquanaut.com, baraldir@ea*.it*
Subject: Re: O2 analyzer circuit board change.
Roberto:

The resistor that needs to be replaced on the DM-3500V is actually
labeled R4.
(R4 is 24K) The voltage reference high (pin 36) is calibrated by
R4/VR1.  The trim pot VR1
is calibrated in comparison with the input voltage thru R2.

brad


>Hi all, is there anyone who as the schematic of this voltmeter?
>Where i live (Italy) ther's no way to buy item explained on the Oxy
hacker..,
>but  we can have similar voltmeter based upon 7106 IC.
>The question is about how to locate the resistor to cut since R3 or
oters #>
>are not printed over the unit, so I need to know at wich component, pin
etc..
>is this resistor conected.
>
>Thanks
>
>Roberto

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