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| New Siglent SDM4000A series Multimeter |
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| Martin72:
Fascinating.... How do you measure the time in ms in such a test? Do you have a trigger in your ear that triggers it? |
| Antonio90:
--- Quote from: Martin72 on August 11, 2024, 06:50:59 pm ---How do you measure the time in ms in such a test? Do you have a trigger in your ear that triggers it? --- End quote --- Why would anyone need that? It's an audible cue. If it stops giving a beep each second, it's not giving a beep. It's not a precision measurement because it's not a precision function. The time in ms is given by the SDG1062X. When the pulse according to the AWG is too narrow for the meter to give an audible beep, I dial it to be wider, with ms resolution, unless lower than a millisecond. |
| Kawakneurder:
--- Quote from: bateau020 on August 10, 2024, 05:59:36 pm ---... (bench) Keysight 34465A: 400ms ... --- End quote --- --- Quote from: Antonio90 on August 11, 2024, 06:15:30 pm ---... 34461A 15ms (latching, sometimes beeps twice per pulse under 50ms or so) ... --- End quote --- How did these two meters get such vastly different readings? I would presume that (at least for continuity) they would share identical circuitry. Hell, considering the price difference you'd hope the 34465A would at least perform slightly better. Or is this perhaps because of the test method? i.e.: --- Quote from: skander36 on August 10, 2024, 10:36:43 am ---... Actually is slower than on Keysight 34465A and Keithley DMM6500. Keithley is quite fast visually but the sound is lagging behind. On Keysight is opposite. ... --- End quote --- That one measures the continuity to beep, and the other to display update rate? --- Quote from: Antonio90 on August 11, 2024, 06:15:30 pm ---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. --- End quote --- --- Quote from: bateau020 on August 10, 2024, 06:18:33 pm ---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 --- Because seeing these it seems you guys both use similar measurement methodologies. |
| Antonio90:
@Kwakneurder There was a firmware update which improved it vastly. Continuity was completely unusable when I bought it, but it became decent after an update, can't remember which one. |
| The Soulman:
--- Quote from: Antonio90 on August 11, 2024, 07:05:42 pm --- --- Quote from: Martin72 on August 11, 2024, 06:50:59 pm ---How do you measure the time in ms in such a test? Do you have a trigger in your ear that triggers it? --- End quote --- Why would anyone need that? It's an audible cue. If it stops giving a beep each second, it's not giving a beep. It's not a precision measurement because it's not a precision function. The time in ms is given by the SDG1062X. When the pulse according to the AWG is too narrow for the meter to give an audible beep, I dial it to be wider, with ms resolution, unless lower than a millisecond. --- End quote --- That's only halve of the story, there still could be a noticeable delay/latency between when the continuity is detected until the beeper beeps. I'd rate that at least as important. |
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