[volt-nuts] Datron 1281 offset null, Bias current adjustments

Electronics and Books electronicsandbooks at yahoo.com
Sat May 23 06:41:09 EDT 2015

looking at the schematics on page 11.2-3 the bias should be adjusted by shorting the inputs of the amplifier and then a zero output.
biasshorting the external input and measure the output of the amplifier
i could not find the internal adjustments in the manual.
 Met vriendelijke groeten



Discere ne cesses
      From: "starbook at uplink.net" <starbook at uplink.net>
 To: Discussion of precise voltage measurement <volt-nuts at febo.com> 
 Sent: Saturday, May 23, 2015 10:39 AM
 Subject: [volt-nuts] Datron 1281 offset null, Bias current adjustments

I have a Datron 1281 DMM.
How to set the bias current adjustment (R222)?
How to set the offset null adjustment (R317)?
John Staron
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