Yeah the scopemeters are neat. The 87/89 and (slightly upgraded) renumbered brethren (189) can simultaneously display an ac voltage and it's measured dc offset. It can also do duty cycle...
-- John W Reames jwrea...@comcast.net Home: +14106646986 Mobile: +14437915905 On Nov 30, 2010, at 11:27, "Mike Gildea" <mikgi...@verizon.net> wrote: >> Umm I thought that most VOM/DVM's had a capacitor in series with the >> input... This ensures that only the ac component is measured. > > True, to a point. Don`t expect much from a Harbor Freight type of meter. > Depends on the quality (price) of the multimeter (DVM/VOM). More expensive > meters do a better job. But for automotive use, were are primarly stuck with > the cheaper units. Very little AC involved. Cheaper and older units use > averaging counting methods as opposed to the more sophisticated sampling > methods. They average highs and lows without displaying the deviation. You > don`t know when there has been a dip or a spike . Peak/hold meters (higher > end more expensive meters) capture and hold and then display the > highest/lowest reading, instead of averaging. They can be programmed for > specific hi and low variations. Some even have print outs over a specified > time period. (ie power line monitors) This works well for capturing digital > pulses, spikes, circuit loading. Fluke, as you are probably aware of, makes > both high quality and mid quality units. A few low end units. One of their > models is made for auto technicians. Most of their models are designed for > touchy computer circuits. They also have one sweet digital display unit that > gives digital readouts and also shows waveforms in a compact handheld > device. Kind of like a handheld digital o`scope. Nice, but very very > pricey. > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
