Products > Test Equipment
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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