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| Why do we want fast continuity detection in a multimeter? |
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| Fungus:
Fluke 8060A: |
| floobydust:
Cheater cheater pumpkin eater, Fluke 8060A is using an analog comparator for the continuity detect and oscillator. Otherwise, the 8060A's dual-slope A/D "The total length of the measurement cycle is 400 ms. The length of the integrate period is fixed at 100 ms" a bit longer. |
| bdunham7:
--- Quote from: floobydust on June 13, 2023, 02:36:09 am ---Cheater cheater pumpkin eater, Fluke 8060A is using an analog comparator for the continuity detect and oscillator. Otherwise, the 8060A's dual-slope A/D "The total length of the measurement cycle is 400 ms. The length of the integrate period is fixed at 100 ms" a bit longer. --- End quote --- Most meters with a fast bar graph have to have something to operate that bar graph at a much greater speed than the normal ADC circuit. I can't imagine any DMM with 'fast' continuity actually using the ADC in it's normal configuration. |
| bdunham7:
--- Quote from: Fungus on June 13, 2023, 01:06:50 am ---Fluke 8060A: --- End quote --- Also note the variable threshold. Not having any non-crap non-Fluke meters, I wonder if other brands typically have multiple continuity thresholds like that? |
| floobydust:
--- Quote from: bdunham7 on June 13, 2023, 02:53:46 am --- --- Quote from: Fungus on June 13, 2023, 01:06:50 am ---Fluke 8060A: --- End quote --- Also note the variable threshold. Not having any non-crap non-Fluke meters, I wonder if other brands typically have multiple continuity thresholds like that? --- End quote --- Fluke using 10% of any ohms range for a value is just the H/W result of using a comparator and beeper that are always enabled. I'm saying it's not a feature, who wants a beep on 20kΩ range with readings below 2kΩ? for example. My old Beckman/Wavetek (manual range) will beep once and light up the ohms symbol if it sees resistance above the range you are on. I find that useful, telling you to range up. One has a 20Ω/4mA range as well but I forgot the compliance voltage, and I haven't used it for a long time forgot what threshold that has. |
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