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| New Siglent SDM4000A series Multimeter |
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| nctnico:
--- Quote from: KungFuJosh on August 10, 2024, 02:50:20 pm --- --- Quote from: nctnico on August 10, 2024, 02:46:54 pm ---That delay is long enough for me to get bored / annoyed. Seriously. --- End quote --- :-DD :-DD :-DD Show us your faster continuity tester! --- End quote --- You can ofcourse try to make fun out of pure fanboyism but the way the continuity works on many bench DMMs is just too slow for what I use continuity for. Not only when measuring continuity between two points (for which I take 3 quick measurements). When doing reverse engineering I swipe a probe across a row of contacts quickly. That just won't work when there is a delay due to software defined continuity. |
| KungFuJosh:
--- Quote from: nctnico on August 10, 2024, 06:00:13 pm ---You can ofcourse try to make fun out of pure fanboyism but the way the continuity works on many bench DMMs is just too slow for what I use continuity for. Not only when measuring continuity between two points (for which I take 3 quick measurements). When doing reverse engineering I swipe a probe across a row of contacts quickly. That just won't work when there is a delay due to software defined continuity. --- End quote --- I'm not making fun at all! It's just funny to me when people say ~30ms is slow. I get that some handhelds are faster, but I've never found anything in the sub-50ms range to feel slow. But also, a lot of people say it's slow without specifying what they consider acceptable. More importantly, which device they currently use that is faster, and what that measured speed actually is. --- Quote from: bateau020 on August 10, 2024, 05:59:36 pm ---So to give some numbers about continuity beep minimum contact period of some of my meters: (hand) Fluke 179: 0.2ms (bench) Keithley DMM6500: 3ms (hand) Uni-T UT123T: 13ms (hand) eevblog 121GW: 40ms (bench) Siglent SDM3055: 50ms (bench) Keysight 34465A: 400ms So, yes, handheld is normally faster, but there are exceptions. --- End quote --- How was that Fluke measured? That seems too amazing. 😉 I want a DMM6500, but it's out of my budget. I'd buy two more SDM3065Xs before buying it considering that the SDM3055X-E is really better than what I generally need. |
| bateau020:
--- Quote from: KungFuJosh on August 10, 2024, 06:10:14 pm ---How was that Fluke measured? That seems too amazing. 😉 --- End quote --- With an AWG directly driving the input of the DMM. 1Hz cycle, 50 Ohm output impedance, H=5V, L=a couple of mV negative (as 0V was seen as over 10 Ohms). Yes, I should use a FET or so, but this was a quick set up, and easily tuned to the DMMs. |
| KungFuJosh:
--- Quote from: bateau020 on August 10, 2024, 06:18:33 pm --- --- Quote from: KungFuJosh on August 10, 2024, 06:10:14 pm ---How was that Fluke measured? That seems too amazing. 😉 --- End quote --- With an AWG directly driving the input of the DMM. 1Hz cycle, 50 Ohm output impedance, H=5V, L=a couple of mV negative (as 0V was seen as over 10 Ohms). Yes, I should use a FET or so, but this was a quick set up, and easily tuned to the DMMs. --- End quote --- That's cool. I should try that with my meters. |
| Antonio90:
Some tests: AN8002 7.2ms (latching) AN8008 7.2ms (latching) BM869s 0.2ms (not really audible under that) SDM3045 (3055X-E) 50ms (misses very few beeps down to 40ms) 34461A 15ms (latching, sometimes beeps twice per pulse under 50ms or so) 34401A 9ms (latching) very few lost pulses down to 6ms WH5000A 3ms (latching) UT181A 2ms (latching) MTX 3282 10ms, non latching, not really audible under 15ms. 1Hz, levels adjusted to 2-10 Ohms depending on the DMM, varying pulse width. Tested for 10 seconds or so to check for lost pulses when approaching the limit of each one. Really, the Siglent is nothing special. You might argue it is good enough for your use case, but it is worse than almost any other DMM. I'd say the sample is a good mix, from bottom of the barrel to high-end. A bunch of edits. Formatting and typos. |
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