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| Multimeter fuses |
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| CraigHB:
I have a high end Extech handheld multimeter that takes a big ass fast blow fuse on the uA/mA range. It takes a similar one on the Amp range, but it's hard to blow that one and it's a lot cheaper to replace. It's crazy expensive to replace that low current fuse, ridiculous really. It's easy to blow that one too. I ended up adapting a more standard size fuse with an acceptable replacement cost. Though the voltage rating on the reasonably priced replacement is 250V compared to 1kV for the original. That's fine for me since I don't use my meter for high voltage. |
| EEVblog:
My ASTM fuses are on the way, 400mA 1000V and 11A 1000V. Not sure how best to sell them though, as some sort of set maybe? like 5x400mA and 2x11A? For individual shipment I suppose I can just ship them in a cardboard envelope by regular post or something? Otherwise you'll be able to order on my store and include with other purchases. Not sure if it's worth having them on Amazon and ebay. I will have enough stock for the entire planet I suspect |
| Wytnucls:
--- Quote from: CraigHB on February 23, 2017, 06:03:21 pm ---I have a high end Extech handheld multimeter that takes a big ass fast blow fuse on the uA/mA range. It takes a similar one on the Amp range, but it's hard to blow that one and it's a lot cheaper to replace. It's crazy expensive to replace that low current fuse, ridiculous really. It's easy to blow that one too. I ended up adapting a more standard size fuse with an acceptable replacement cost. Though the voltage rating on the reasonably priced replacement is 250V compared to 1kV for the original. That's fine for me since I don't use my meter for high voltage. --- End quote --- There is an easier solution: NEVER use the mA range! You will usually get enough resolution on the Amps range and there is virtually no problem with burden voltage. |
| CraigHB:
It depends on the meter though. I use my mA range a lot since it only goes up to 5mA on the uA range and the Amps range does not have good resolution at very low currents. But yeah the Volts/Amp burden on the uA range is high enough to keep lower voltages from blowing the fuse. The way it gets blown is I forget it's in mA mode and go to check a voltage not realizing I'm in the wrong mode. Pretty much the opposite of idiot proof, totally dependent on the user paying attention. In any case, it's kind of a kludge the way I adapt the cheap fuses. If I could get the low current ones for cheap that would be a better option. So yeah I'd be interesting in picking up some of those fuses if they are available and they're inexpensive. |
| Iceberg86300:
--- Quote from: EEVblog on March 10, 2017, 06:36:05 am ---My ASTM fuses are on the way, 400mA 1000V and 11A 1000V. Not sure how best to sell them though, as some sort of set maybe? like 5x400mA and 2x11A? For individual shipment I suppose I can just ship them in a cardboard envelope by regular post or something? Otherwise you'll be able to order on my store and include with other purchases. Not sure if it's worth having them on Amazon and ebay. I will have enough stock for the entire planet I suspect --- End quote --- I'd buy em for my crappy craftsmen meter which currently has CHEAP radio shack fuses in it. 5/2 sounds pretty reasonable. If you only offer them in that configuration then I'd pay the neighbor kid to tape them to a piece of cardboard, then fold it over and tape for a cardboard-fuse-cardboard sandwich. Maybe just one piece of cardboard if you send a bunch of stuff in cardboard or padded envelopes and buy those in bulk. Poor man's blister pack essentially. Then you could just grab a "fuse card" when ordered and not have to screw around with picking out and stuffing fuses into baggies and then adding protection based on the order. Although I guess you could pay the neighbor kid to stuff a bunch of baggies as well. You just lose the inherent protection of a piece of a cardboard. |
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