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| Adding fuse to cheap Chinese multimeter: DT830X |
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| beavernuggetz:
Hello everyone, Let me start by saying I'm a long time lurker and joined today because I have a specific question. I've seen some videos where folks add a fuse to the DT830 series multimeters which have the pads for the physical fuse but don't come with one pre-installed. Here is one such video: In each one, they cut a trace which connects (continuity) the pads for the fuse but on mine I cannot see such trace. So my questions are: Can anyone see where I would cut to do the same? Does it matter if the pads are continuous? If I do this, will it provide better protection? I'm not a complete n00b and own other meters such as Fluke 25, 87 III, etc. and simply bought this cheapo as a backup and novelty item. Any constructive feedback will he greatly appreciated. Thanks! |
| tunk:
Look for the current shunts, the copper wire is for the 10A range, and R13 and R15 could be for the lower ranges. Edit: The two large unpopulated pads near R15 could be for a fuse. Trace them to the other side and see if there's a zero ohm "resistor" somewhere. |
| beavernuggetz:
Yes, the 2 unpopulated pads are indeed intended for a fuse. Not sure if I can solder the fuse directly to those pads or if additional tweaking is needed such as in the video. |
| Fungus:
These holes are called "vias" and they're places where traces go to the other side of the PCB. Look on the back of the PCB, I bet you'll find a cuttable trace between these vias. |
| Fungus:
--- Quote from: beavernuggetz on May 11, 2023, 10:48:20 pm ---If I do this, will it provide better protection? --- End quote --- Not really. Fuses are only connected in the Amps range, they don't make any difference when you're measuring volts/ohms, and you shouldn't really be using this meter on anything where you need more "protection". |
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