Re: it's easy to add an external battery at 2465B NVRAM

GerryR <totalautomation1@...>

Hello Joseph,
Did you remove the internal battery before / after adding the external battery?
The Test 04 fail probably means your calibration data is corrupt, and once you have replaced the NVRAM, you have to recalibrate the 'scope.


----- Original Message -----
From: "Joseph" <>
To: <>
Sent: Monday, January 13, 2020 7:02 AM
Subject: [TekScopes] it's easy to add an external battery at 2465B NVRAM

[color=red][b]Yes, it's easy to add an external battery at NVRAM[/b][/color]

[size=10pt][b]1) I used this Dremel head
Before begin .. insert the NVRAM in a socket to protect his fragile pins !![/b][/size]


[size=10pt][b]2) I started in front of the first "A" of text "DALLAS" ... this is where is located the pin 7 of IC
(Luckily the DS1218 is a old DIL8 case with his large pins which will makes research easier)[/b][/size]


[size=10pt][b]3) Carefully I came down and widen the hole very near of case until i seen the copper appear
(It's the good moment to measure the internal battery voltage between this copper and pin 14 of the NVRAM)
Then i widened it enough to be able to solder a wire[/b][/size]

[size=10pt][b][color=red]Maybe a piece of advice : do not widen it too much on the side of the "D" and "L" of dallas so as not to short-circuit, with the dremmel head, the pins 7 with 6 or 8 of DS1218 because I don't know if that could kill it?.. [/color][/b][/size]


[size=10pt][b]4) I cut the branches of my socket to be able to easily pass the wire
Then I soldered two wires:
- positive on pine 7 of DS1218
- negative on pine 14 of NVRAM[/b][/size]


[size=12pt][b][u][color=red]Result :[/color] [/b][/size]
[size=10pt][b][color=red]Before this operation I couldn't read the NVRAM on my programer and after I could do it .. I was happy![/color][/b][/size]

[size=12pt][u][b]My final solution :[/b][/u][/size]
[size=10pt][b]I decided to keep the original NVRAM equipped of an external battery
For the battery I chose this one on Amazon[/b][/size]


Join to automatically receive all group messages.