Correct.? What is likely being done is to replace the battery while the equipment is line powered.
If the battery is dead, then obviously, no problem.
What a safer approach (to me) would be is to supply a backup voltage to the circuit, device unplugged, then cut the battery loose.? Then desolder and replace, then remove the supply.
I'm not sure that interrupting the ground is wise.? If you do go with an isolation transformer, then that one meg resistor from the iron ground to chassis ground is a good idea.
I wonder if there's a battery holder that would be soldered into the board with the same spacing?
Harvey
toggle quoted message
Show quoted text
On 2/28/2025 11:15 AM, Radu Bogdan Dicher via groups.io wrote:
Harvey - correct me if I'm wrong, but I think the issue is supplying the 3V while working on the battery (soldering with a grounded iron) from an external power supply so the memory would be preserved.
What I'd probably do is run the soldering?station off of an isolated power supply (mine is a BK 1655) with an interrupted ground. I'm not entirely sure on ESD protection, but if I'd do this while supplying the 3V off of an external power supply, that'd probably do OK handling that part.
Radu.
On Fri, Feb 28, 2025 at 7:33?AM Harvey White via groups.io <> <madyn@...> wrote:
You could, of course, simply unplug the meter you're working on,
so it's
isolated?
Rubber mat if needed.
Harvey
On 2/28/2025 4:16 AM, Leo Kroonenburg via groups.io
<> wrote:
> I modified my soldering station lije this:
> Instead using the hard ground wire to the tip I replaced it with
a 1
> MOhm resistor inside the soldering station.
> No more risk of shorting stuff, and still a 0V potential in the tip.
> Works for me.
> Leo
>
