Hello Arduino Forum :-)
Recently a friend of mine gave me a Fluke 179 multimeter. I tested it out right away and found out that it wouldn't measure amps, I opened it to find out the two fuses was blown. The originally installed in the multimeter was: "Buss Fuse DMM-44/100" and a "Buss fuse DMM-11A" - I've tested them both with my continuity tester and found no connection across them...
Right away I ordered these: Buss Fuse DMM-11A http://www.ebay.com/itm/331072212283?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Buss Fuse DMM-B-44/100 http://www.ebay.com/itm/380792668022?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
I asked the seller about the DMM-B-44/100 as I didn't know if it would fit because the original one didn't have the same model number, he told me it should fit, so I brought it and received it today. I tested it with my continuity tester before installing it, and it all seemed right.
I was going to test it right away, I moved the red probe to "400 mA" connector and selected the mode called "mA Hz" on the multimeter. I tested it with a small DC motor 12V which used 350mA measured with my power supply. As I connected the multimeter in series with the DC motor the screen on the multimeter showed the same 350mA as my power supply did. I've tested it a half minute and then it suddenly didn't show any amperage use at the multimeter, I couldn't get it to show amperage use again, even though my power supply still showed 350mA. I took the fuse out and tested it with my continuity tester to find out there was no connection...
I don't know much about the Fluke 179 but is it really possible that a dc motor using 350mA killed the fuse? - isn't there some kind of a cut off circuit to prevent this from happening?
I hope someone has an answer as I would like your opinion on if I should by a new fuse, or something else in the multimeter is broken, causing the blowed fuse. If you need any details just tell me :-)
Thank you very much Best regards JohannesTN