EMRFD Message Archive 5840

Message	Date	From	Subject
5840	2011-02-15 13:01:56	Glen Leinweber	self-protecting multimeter
Was aghast to find that the fuse protecting current scales of a Fluke meter cost over$20 ! I suppose that your life is worth more, but these blow regularly on my bench. A superlative meter made in Hungary (GANZ UNIV 3) is protected by a sensitive breaker, that pops a button up on its front panel. AVO used to have something similar. Both of these are top-dog analog meters with 1% accuracy. Both seem to be playing hard-to-get nowadays. Haven't seen digital meters play this game. They all hide their blown fuses under lids or cases, or require a screwdriver to reveal their sad fate. Anyone know of a self-healing quality meter that can measure both AC/DC volts, as well as AC/DC amps?
5841	2011-02-15 14:21:54	michael taylor	Re: self-protecting multimeter
5842	2011-02-15 22:57:38	ehydra	Re: self-protecting multimeter
If're willing to make it yourself: Add depletion high-voltage MOSFETs anti-serial. Supertex has a app note about it. - Henry -- ehydra.dyndns.info Glen Leinweber schrieb: > Was aghast to find that the fuse protecting > current scales of a Fluke meter cost over$20 ! > I suppose that your life is worth more, but these > blow regularly on my bench. > A superlative meter made in Hungary > (GANZ UNIV 3) is protected by a sensitive > breaker, that pops a button up on its front panel. > AVO used to have something similar. Both of > these are top-dog analog meters with 1% > accuracy. > Both seem to be playing hard-to-get nowadays. > > Haven't seen digital meters play this game. They > all hide their blown fuses under lids or cases, > or require a screwdriver to reveal their sad fate. > > Anyone know of a self-healing quality meter that can > measure both AC/DC volts, as well as AC/DC amps?
5843	2011-02-16 11:25:26	ae5ew	Re: self-protecting multimeter
The more expensive fuse Fluke uses can break a higher voltage, high amperage current than a smaller, cheaper fuse. Charles AE5EW