OK, I just tested out a few more and you're right. It's just quite slow with caps larger than 10uF and it doesn't work at all on 100uF or larger ones.
You can see that it's not a feature I've really ever cared about. I was just curious.
I just connected it to my oscilloscope and it seems to charge the cap to a certain voltage (looks like 1.5V) then discharge it to 1V, charges again then discharge half way then back up again.
I'm assuming it's timing how long it takes to do this and just solves for C because it already knows T and R?
This IS the Beginner forum so I'm asking beginner questions here.
I guess mine just doesn't work in that setting. I've never seen it do anything useful.
What value cap are you testing it with.
The larger the capacitance, the longer the test will take.
On my VC99 meter for example, measuring 100uF takes about 7 seconds to produce a result, before which time it will just displays 0 (of course, depends on your meter....) which if you were not expecting that you might think "this thing isn't working", when it is working, it's just taking a while because you're measuring a "large" capacitance.