AMAZING, originally a $20 meter, guessing after time, parts, and labor, now CUSTOMIZED at over $500!
The exercise is not to waist time and money (maybe it's pastime with a purpose?). Joe's channel is the only one I know of that stands up to poor DMM manufacturers by sharing what could have been done but wasn't (for a whole host of reasons).
You misinterpreted my post, I love the time and effort Joe takes to produce his videos, not sure where he finds the time. My point was there are probably some that would love one of these tiny meters that are customized to such a higher quality degree, but it would cost TOO MUCH in reality. So again, a $20 meter can be "upgraded" to much better grade, but I'm sure Joe would laugh at being able to make any money after his time, labor, and parts, even at $500!
If you would like a better handheld meter the best option is to just buy one that meets your needs. If you are interested in seeing a particular product improved, I would contact the manufacture and let them know what features you are interested in. I would never suggest anyone attempt to modify their handheld meter like I have shown. I certainly would never offer any sort of a modified handheld meter or kit for sale. I would see this as nothing more than a scam. Worse, you are putting people at risk over a few dollars. Sorry, not interested.
I did hook up the programmer and downloaded the contents of the PROM for the ZT102. I went ahead and opened the window for the Amps range so the uA no longer beeps. I also moved down the warning and over range limits. I started to look at the switch and it does not seem like there is a clean way to change it.
This is the unmodified contents:
:10000000FFFFFFFFFFFFFFFFFF5200BE0070C903AD
:100010001017381844026E50644B3C3C0AFF40FFF6
:10002000C798E38264009600008000803B7E826F68
:100030004E020930010A9AF60984F509E8030A001C
:1000400000010001000798006400640064000000E3
:1000500000800080008000800080008000800080A0
:10006000817E00830100922A000000000000000051
:1000700053810080C57DE07C180100000000000075
:100080000000000000001013000E00070012030122
:100090000000000000001115000F0009000004021C
:1000A00000000000000000000000000A0000000046
:1000B00000000000000000000000000B0000000035
:1000C0000D0002100D00032020000320200003106B
:1000D0000080008000800080410003050D000220A8
:1000E0000080008000800080008000800080008010
:1000F0000080FFFFFFFFFFFF5AC7CC0F0FA20000D9
:00000001FF