U1620A备用电池怎么更换

在U1600系列等相对便宜的产品上，没有“真正的”服务手册。
它们在组件级维修时非常有用，但由于成本原因，可更换部件的数量越来越少。
在许多情况下，有一个PC板，有一些回流零件，可能还有一些连接器。
它们不是为自我修复而设计的，因此没有相关的说明。
人



以下为原文

There are no 'real' service manuals anymore on relatively inexpensive products like the U1600 series. They were very useful in the days of component-level repair, but for cost reasons, there are fewer and fewer replaceable parts. In many cases, there's a single PC board with a few reflowed parts and maybe some connectors. They are not designed for self-repair, so there are no relevant instructions on doing that.

Al

嗨Al，我理解你的观点，但我仍然认为这更多是关于更便宜的商业政策。
例如，我习惯使用Fluke 196C;
虽然已经过时，但它与U1600系列的技术和价格相当;
无论如何，我们提供全面的维修手册，详细的故障排除和校准程序以及完整的原理图。
顺便说一句，我还发现Fluke更加用户友好：它立即开启，而U1620需要大约一分钟才能启动，万用表更加实用（响应），显示-IMHO-虽然更具可读性
分辨率较低。
当然，U1620A显示器本身质量更好;
我切换到Agilent / Keysight设备的主要原因是我需要更深的内存缓冲区。
为了回到主题，我刚刚订购了一台松下CR-1220 / HFN纽扣电池（我无法读取原始电池标记，因为它被标签覆盖：这里是一本好的服务手册会有用的地方）。
BR-1220应该更适合，但我找不到一个随时可用的。
我计划将一个临时的3 V电池与旧电池并联（串联一个5-10k电阻），同时拆下并更换硬币;
这是因为看起来低残留电池电压仍然足以保留一些数据（例如，RTC日期不会丢失）。
任何建议都是受欢迎的。
此致，卢西奥。



以下为原文

Hi Al,

I understand your point of view, but I still think it's more about a cheaper business policy.

For example, I'm used to work with a Fluke 196C; while obsolete, it's quite comparable to the U1600 series for technology and price; neverthless, a full service manual is available with detailed troubleshooting and calibration procedures and complete schematic diagrams.

BTW, I also find the Fluke more user-friendly: it switches on immediately while the U1620 requires about one whole minute to boot up, the multimeter is much more usable (responsive) and the display -IMHO- is a little bit more readable despite of the lower resolution.
Of course, the U1620A display itself has much better quality; the main reason why I switched to the Agilent/Keysight device was my need for a much deeper memory buffer.

To get back in topic, i just ordered a Panasonic CR-1220/HFN coin cell (I'm not able to read the original battery marking because it's covered by the tab: here is where a good service manual would have been useful).
A BR-1220 should be a little better suited, but I couldn't find one readily available.

I plan to connect a temporary 3 V cell in parallel to the old one (with a 5-10k resistor in series) while removing and replacing the coin; this because it looks like the low residual cell voltage is still enough to keep some data (e.g., the RTC date didn't go lost).

Any suggestion is welcome.

Regards,
Lucio.