Multimeter Fuses.

[WOPL Sniffer]

One of my Flukes has a blown fuse for the current side and I just went and looked at Mouser..... $60 bucks my ass but I don't prefer to run a Cina Fuse from amazon unless somebody here has a source or???

F44 100A 1 KV
and
F11A 1KVA

I need a pair of each so I don't get caught unprepared again. I was measuring both channels and one channel didn't register anything. Checked the meter fuse. BAD! And, of course the meter with the blown fuse was the one I needed because it goes to a lower range (lower than my Fluke 77 III).
My Fluke 77 III won't go that low. It just says 0.00 DC and I can't get it to go lower and will only go as low as 10ma no matter how many times I hit the range button. It wouldn't read the 2.4ma so I went to use the other meter and I ended up having to steal the fuse from the 77.
My Fluke 83 III has a ma setting and uA setting and goes to 00.00ma.

Really strange that the book for the 77 III says it goes to .01ma but I'll be damned if I can figure out how.

 

[WOPL Sniffer]

I saw in the troubleshooting section that there is a chip that controls the auto-ranging function. Maybe it's fixable. After seeing the price of a new meter, I'll just keep swapping them around. Fluke won't touch it as old as it is. Being that everything else works, it may be easier to troubleshoot and I have the skizmo.

 

[WOPL Sniffer]

I think the lowest range is 32.00 mA, 320.0 mA. I've seen conflicting data. Screw it....

 

[20tajk7]

A 100A fuse in the meter ? Are you sure about the marking ? usually for the 10A part it's a 10 or 12A slow blow.

 

[WOPL Sniffer]

F1* Models 23/77: Fuse, F44/100 A, 1000 VAC/DC, Min Interrupt Rating 10 kA 943121 1

F2* Fuse, F11 A, 1000 VAC/DC, Min Interrupt Rating 17 kA

 

[WOPL Sniffer]

A 100A fuse in the meter ? Are you sure about the marking ? usually for the 10A part it's a 10 or 12A slow blow.

Nope, the 11 A is an 11 amp fuse and the 44 100 A is the current fuse at 440ma max. even the fluke website has these numbers. And they are posted inside the meter, AND i also took the numbers off the fuse.... Same-O same-O

 

[20tajk7]

That's confusing, 440mA & 11A is more realist.
I suppose the 10 & 17kA interrupt ratings makes them specific and hard to find.

 

[WOPL Sniffer]

That's confusing, 440mA & 11A is more realist.
I suppose the 10 & 17kA interrupt ratings makes them specific and hard to find.

They are not hard to find, just frigging expensive. It didn't confuse me, It has a part number, and I looked it up on Fluke website.

 

[WOPL Sniffer]

That's confusing, 440mA & 11A is more realist.
I suppose the 10 & 17kA interrupt ratings makes them specific and hard to find.

Not confusing at all. F11 A (pretty simple really) Fuse 11 amps

and the F44/100 A is Fuse, 44/100 means 44 divided by 100=440ma

 

[20tajk7]

Interesting, I've never seen such markings on fuses before, I've thought that was small 5x20 or 6x32mm glass fuses.
And for more confusion I've seen in a tutorial the 11A fuse with green markings labelled as fast blow, in France the slow blow fuses have green markings and the fast blow fuses have black markings.

 

[sweatybetty]

I cant remember how much I paid but I bought 5 fuses at the time. Wouldnt have been more then $8-10 each at the time. The ones I have have are Littlefuse FLU 11A
https://www.mouser.com/ProductDetail/Fluke/803293?qs=aZCcseWLxnv0rmDDerivdw==

https://www.mouser.com/datasheet/2/159/Fuses_chart-1167093.pdf

 

[jbeckva]

For 60 bucks, better be gold encrusted with a serial number plaque you can put on your wall. The heck with that.

 

[J!m]

They’re hi-fi fuses.

 

[George S.]

I've found NOS genuine fuses for all my Flukes (I now have six, with a additional 8920A now on the way to me) on eBay.
Yeah, some of the larger ceramics are expensive, but I can usually find a good deal for a quantity of 5 or more.
Can't remember paying more than $5 each for the odd ball larger ceramics.
I often search using the Fluke part# from the service manual and get results different from a more generic search.
I'm wary about getting fakes, so I closely check out the photos, sellers location, and the other items the seller has for sale. Haven't been burned yet.