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Products => Test Equipment => Topic started by: razvanm on April 02, 2017, 06:37:55 pm

Title: IFR COM-120B NVRAM backup
Post by: razvanm on April 02, 2017, 06:37:55 pm

Hi guys,

I own an IFR COM-120B service monitor and from what I've heard, it has the DS1286 NVRAM chip with internal battery which will go out and you lose your options. Haven't turned on mine since 2014 when it was working fine but I plan on using it in a few weeks. My questions are :

1. Does any of you know if (and how) can the contents of the DS1286 be backed up if there is still enough battery voltage left on the battery?
2. If wiring an external lithium battery to pins 21/25 will maintain the data even if the internal battery goes out?

Thank you.

Razvan

Title: Re: IFR COM-120B NVRAM backup
Post by: KA3YAN on April 10, 2017, 07:48:27 pm

There's a really good post over on the Batwing Labs forum:

http://batboard.batlabs.com/viewtopic.php?f=42&t=111370 (http://batboard.batlabs.com/viewtopic.php?f=42&t=111370)

and

http://batboard.batlabs.com/viewtopic.php?f=42&t=80947 (http://batboard.batlabs.com/viewtopic.php?f=42&t=80947)

They are moderated by an Aeroflex engineer.

Title: Re: IFR COM-120B NVRAM backup
Post by: TheSteve on April 10, 2017, 08:13:16 pm

 :-+ :-+ :-+ :-+ for batlabs.com