怎么更换snaphat SRAM电池

您好，我不知道有关snaphat NVRAM的任何信息，因为我的HP 3458A中有一个旧式PC板，即内置电池的NVRAM。
但在我更改这些NVRAM之前，我已经通过未记录的MREAD命令提取了所有NVRAM的内容，以确保备份。
我也向你推荐，特别是对于2kB CAL RAM的内容。
32kB Rams并不重要，因为只存储了设置数据和用户定义的功能。
如果发生数据损坏（我不相信），你可以拆除RAM，在新的电池就位的电子寄存器上重新编程。
坦率



     以下为原文

  Hello,

I can not tell anything about the snaphat NVRAMs, as I have an old style PC board in my HP 3458A, i.e. NVRAMs with internal battery.

But before I changed those NVRAMs, I have extraced the content of all NVRAMs by the undocumented MREAD command to make sure to have a backup.

That I also recommend to you, especially for the content of the 2kB CAL RAM.
The 32kB Rams are not important, because there only setup data is stored, and user defined functions.

If data corruption would occur (which I don't belive), you could desolder the RAM, reprogram it on an eprommer with the new battery in place.

Frank

您好 - ... - 我上一篇文章的附录：以后我采取了大胆的步骤 - 当装置通电时 - 我用新电池（测试）更换电池 - 使用IC提取器工具 - 并且装置通过所有测试
！
因此，不必再担心每10年更换一次这些电池，并避免不必要的返回工厂进行全面校准。
如果您在SMD板上勤奋地更换电池 - 它将顺利运行！
最好的问候，荷马



     以下为原文

  Hello - ... - addendum to my previous post:

Well later on I took bold steps - while the unit was powered ON - I exchanged the batteries with new batteries (tested) - using an IC extractor tool - and the unit passes all tests !

So no real worries any longer to replace yourself these batteries every 10 years and avoid unnecessary return to factory for full calibration session.

If you replace the batteries in a diligent manner on a SMD board - it will work out smoothly !

Best regards,
Homer