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Where are you buying your fuses? Last I bought fuses for our "fleet" of Flukes at work they were under $10.
So, the big question is, what do you need it for and how precise do you need the measurement to be?See my earlier post. For the rpm feature especially for small single cylinders.
Retail suppliers really do charge a lot for those high voltage interrupt fuses. I can usually find a couple on eBay for a few bucks when I need them. The 87 beeps a warning if I have the leads in the current measuring locations and set the meter to volts, so I don't tend to blow fuses in that meter. :DIf you're never measuring high voltages, you can install cheaper fuses, but I don't to that except temporarily.
One problem with cheap meters is their response to non sine wave AC. I once measured the output of a square wave inverter with several cheap meters and my Fluke 87, which is a true RMS meter. The cheap meters were all over the place, and none read anywhere near 120VAC. The 87 did what it was supposed to do.This can come into play around motorcycles when measuring things like battery voltage with the engine running. The output of the regulator is not steady DC, and causes ripple on the battery's DC. Meters that aren't designed for measuring DC with ripple can give readings that are pretty far off in a case like this.Some guys insist on using analog meters around vehicles for this reason. Analog meters are also immune to RF interference from the ignition system, where even a Fluke can get confused. I've had to put ferrite beads on the meter leads a few times, to keep the Fluke happy when making measurements around CDI systems.
The biggest problem with cheap meters is they can kill you! I'd hate to have one short out when trying to read 480 vac! BOOM! Fluke is the good stuff.
The biggest problem with cheap meters is they can kill you! I'd hate to have one short out when trying to read 480 vac! BOOM! Fluke is the good stuff.I keep those $5 HF meters all over the place. They're in my tank bag, glove box, etc. It's fine for that purpose, 90% of the time.LCD Automotive Multimeter with Tachometer Kit $35 at HFThat's probably what I'd get for my own garage using it once or twice every couple of years. As a professional, where accuracy and safety are paramount, Fluke is a good choice.
That's the reason Flukes have the High Rupturing Capacity fuse.I spoke to an electrician once who tried to measure 3.3KV with an AVO, he said every time he tried to lift the probe of it would draw a long arc. In the end he just dropped it and ran. That was in the days before you had to wear a fancy suit working on live switchgear.
Help this layman out Jim. What is the purpose of ferrite beads?
This would be great if it did one and two cylinder engines. So I guess my question would be, what do people use for tuning rpm on one and two cylinder engines two or four cycle motors. Since most meters start at three and up.
Linemen/electricians have been wearing long sleeve insulating gloves and vests for 75 years or more to work on high voltages.Sounds like the guys was being very careless... 3300 volts doesn't care about fuses and may jump the blown fuse and zap you anyway....High voltage high current demands specialized tools.....
I remember using a Jesus hook to ground out high voltage systems when working on them. You haven't lived until you are twisted up inside of a large piece of equipment using in eccess of one million volts that shunts to ground while your working on it.I had quite a surprise from that.we used a special fluke and probe if live. Yes, gloves shield and rubber suit like some serial killer. Good memories.
It used to be you could tell a lot about a man by his tools. Used to be. My dad would turn over in his grave with the idea of disposable tools aka h/f. Can't say I didn't inherit a similar feeling for quality tools. :beat_horse
Passing the wire through a ferrite bead or snap-together ferrite choke forms an inductor in the wire. Inductors don't like to allow a sudden change in current, and tend toward becoming an open circuit at high frequencies, looking like a broken wire to RF. Since RF interference from ignition systems is a high frequency phenomenon (radio frequency), the bead(s) greatly reduce the ability of the RF to get to the meter.
Do they teach that in school. ;D :bow