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| Fungus:
--- Quote from: Traceless on December 02, 2022, 08:21:37 am ---The reason I'm asking my original question is that I'm currently looking at a meter that noone, including Joe has tested yet. The Brymen BM089 which according to its datasheet complies with: UL/IEC/EN61010-1 Ed. 3.0, IEC/EN61010-2-033 Ed. 1.0, CAN/CSA C22.2 No. 61010-1 Ed. 3.0, IEC/EN61010-2-032 Ed. 3.0 & IEC/EN61010-031 Ed. 1.1:Measurement Category III 1000V & Category IV 600V AC & DC. --- End quote --- If Bryman says that in the user manual then it's a safe bet that it met those standards. --- Quote from: Traceless on December 02, 2022, 08:21:37 am ---So the question is basically does any of the aforementioned safety-standards imply that they actually tested the meter with all three leads connected to mains and put it in the µA range and it didn't blow up? --- End quote --- Yes. |
| Fungus:
--- Quote from: Traceless on December 02, 2022, 08:21:37 am ---If you look at the specs more closely though, they say that the DC µA range of that meter has a burden voltage of 3.5mV/µA aka. 3.5kV/A which is pretty high. Still DC µA will create a short across the mains and there is a lot of energy involved... --- End quote --- The uA range is for measuring flame sensors so it will have a very limited range, hence the high burden voltage. (and also the safety rating - the internal resistance in uA mode is nowhere near zero so only a low current will pass). |
| BeBuLamar:
Thanks! I didn't know but when I called Fluke and told them they said it's underwarranty. Just have to send the old one for them to destroy they send me a new one. |
| tautech:
--- Quote from: Fungus on December 02, 2022, 02:46:00 pm --- --- Quote from: Traceless on December 02, 2022, 08:21:37 am ---If you look at the specs more closely though, they say that the DC µA range of that meter has a burden voltage of 3.5mV/µA aka. 3.5kV/A which is pretty high. Still DC µA will create a short across the mains and there is a lot of energy involved... --- End quote --- The uA range is for measuring flame sensors so it will have a very limited range, hence the high burden voltage. (and also the safety rating - the internal resistance in uA mode is nowhere near zero so only a low current will pass). --- End quote --- :-// Maybe you have never built and needed to measure the quiescent draw of a micro power device. |
| Fungus:
--- Quote from: tautech on December 02, 2022, 05:51:20 pm ---Maybe you have never built and needed to measure the quiescent draw of a micro power device. --- End quote --- I've built a lot of coin cell powered devices that lasted for years. OTOH I wouldn't want "flame sensor test" to be the only uA range on my multimeter, and I certainly wouldn't want that huge burden voltage. |
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