[volt-nuts] Wanted - UK source of a replacement battery (type LX 1634) for HP 3457A 6.5 digit multimeter

[Tom Miller]

Looking through the service manual I don't see a connection from the battery 
to the NVRAM. I am sure I measured battery voltage on pin28 so I suspect a 
schematic error. Can someone that has one open verify that? My 3457 is in 
cal and I prefer not to break the seals.



----- Original Message ----- 
From: "Mark Sims" <holrum at hotmail.com>
To: <volt-nuts at febo.com>
Sent: Sunday, January 24, 2016 7:36 PM
Subject: [volt-nuts] Wanted - UK source of a replacement battery (type LX 
1634) for HP 3457A 6.5 digit multimeter


> Although I have not done this on a 3457A,  I have done it on other 
> devices:
> Take new 3.6V battery.  Solder silicon diode to new battery lead (near the 
> cell) to drop voltage to 3.0ish volts.  Solder battery / diode to existing 
> battery leads (near the circuit board).  Cut old battery free.
> _______________________________________________
> 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.