Appreciate your review; I was checking to see if any improvement over the Zoyi ZT-303. Other than 25000 vs 19999 count, both have same resolution and accuracy specs. The ZT-225 has AC+DC and Temperature, which ZT-303 does not. Capacitance measurement resolution is to 1 pf, but neither meter is accurate as you showed. For small values typical of RF work, ZT-225 (+) offset can re REL'd out, but my ZT-303 has (-) neg offset and can't be zero'd. It will not measure caps < 25 pf. Both product specs say "Auto/manual ranging", without explaining what is meant. V, A, and R auto-range and have some manually-selectable ranges, but on ZT-303, C, Hz, and % scale ranges can't be chosen. It will only auto-scale. I was ready to pop for the -225, but don't see enough improvement over the -303. Thanks again for the super review!
You are welcome, no dmm is capable of reading small capacitors below 33pf. In my opinion 100pf and higher is okay. Perhaps invest in LCR meter for that type of work. I don't have 303 but they are mostly identical and based on same chip...
@@aktronics Agreed, partly... I bought a Hantek 1833C LCR recently and learning how to use it. If you understand how to set parameters and do Open and Short cals, it can give reliable sub-pf readings without Kelvin clips. But that's work, and if you're not so careful, you get pure garbage. (It sometimes makes me wish for a meter that only gives one value.) Ideally 'Auto' mode would help, but Auto still leaves Ω range, frequency, and Ser/Par to be set. So DMMs are easier to use, and often good enough. The 121GW is stable enough, has resolution to easily read caps under 30 pf, but mine has ~48 pf negative offset (similar to the ZT-303) and I hesitate to try using a non-official calibration procedure.. So to fix that meter, I use a duplex banana jack between the meter and the test leads. It has a few NPO caps soldered between its terminals - enough so "zero" reads a small positive value, which REL can correct. But if the offset is low enough for my use case that day, I don't use REL so the meter scale can be changed without having to re-REL. If I'm doing some number of cap readings, I just leave the banana jack in place.
@@anonamemous6865 There is always a better multimeter. Buy something according to your budget and needs. In this price point 225 is a very good model with good accuracy and good features.
@@aktronics my budget is closer to zoyi zt 225, the specs I want in a multimeter is great accuracy, many features or(similar in the video), and lastly is safety. I'm a beginner and I want some good multimeter that can motivate me to continue doing my passion
@@anonamemous6865 It can satisfy all of your needs, just be careful with current ranges. (Just like any other multimeter current ranges are dead short and shouldn't be connected to a power source directly... [in series is the correct way]) other than that it can protect itself in wrong ranges and it's safe to use and safe to even make mistakes. I've explained many things in this video. Watch carefully, hope it's useful 👍🏻
Appreciate your review; I was checking to see if any improvement over the Zoyi ZT-303. Other than 25000 vs 19999 count, both have same resolution and accuracy specs. The ZT-225 has AC+DC and Temperature, which ZT-303 does not.
Capacitance measurement resolution is to 1 pf, but neither meter is accurate as you showed. For small values typical of RF work, ZT-225 (+) offset can re REL'd out, but my ZT-303 has (-) neg offset and can't be zero'd. It will not measure caps < 25 pf.
Both product specs say "Auto/manual ranging", without explaining what is meant. V, A, and R auto-range and have some manually-selectable ranges, but on ZT-303, C, Hz, and % scale ranges can't be chosen. It will only auto-scale.
I was ready to pop for the -225, but don't see enough improvement over the -303. Thanks again for the super review!
You are welcome, no dmm is capable of reading small capacitors below 33pf. In my opinion 100pf and higher is okay. Perhaps invest in LCR meter for that type of work. I don't have 303 but they are mostly identical and based on same chip...
@@aktronics Agreed, partly... I bought a Hantek 1833C LCR recently and learning how to use it. If you understand how to set parameters and do Open and Short cals, it can give reliable sub-pf readings without Kelvin clips. But that's work, and if you're not so careful, you get pure garbage. (It sometimes makes me wish for a meter that only gives one value.) Ideally 'Auto' mode would help, but Auto still leaves Ω range, frequency, and Ser/Par to be set.
So DMMs are easier to use, and often good enough. The 121GW is stable enough, has resolution to easily read caps under 30 pf, but mine has ~48 pf negative offset (similar to the ZT-303) and I hesitate to try using a non-official calibration procedure..
So to fix that meter, I use a duplex banana jack between the meter and the test leads. It has a few NPO caps soldered between its terminals - enough so "zero" reads a small positive value, which REL can correct. But if the offset is low enough for my use case that day, I don't use REL so the meter scale can be changed without having to re-REL. If I'm doing some number of cap readings, I just leave the banana jack in place.
@0202fabrice nice work around 👏
Thanks for the review. Thinking about getting a zt225 just for the ac+dc feature.
You are welcome, hope this review helped you decide better.
@@aktronics Is it the best multimeter or is there a better option? Please make a comparison
@@anonamemous6865 There is always a better multimeter. Buy something according to your budget and needs. In this price point 225 is a very good model with good accuracy and good features.
@@aktronics my budget is closer to zoyi zt 225, the specs I want in a multimeter is great accuracy, many features or(similar in the video), and lastly is safety. I'm a beginner and I want some good multimeter that can motivate me to continue doing my passion
@@anonamemous6865 It can satisfy all of your needs, just be careful with current ranges. (Just like any other multimeter current ranges are dead short and shouldn't be connected to a power source directly... [in series is the correct way]) other than that it can protect itself in wrong ranges and it's safe to use and safe to even make mistakes. I've explained many things in this video. Watch carefully, hope it's useful 👍🏻