Does one need to know all the different types of meters (past and present)? - Page 1
Forum section: electronics / beginners

author: doctorm
author_rank: Regular Contributor
timestamp: July 28, 2010, 08:47:52 pm
content: in the book im reading to learn about electronics as my hobby, im in a frustrating chapter about all the types of meters ever made and how they came to be.its a real bore, to say the least, but im trying to be a trooper and learn it bc i would figure it may prove useful or somehting later on but the more i read, the more i think not.so my question is do you really need to know all the types of meters that are out there and how they work and stuff?

author: EEVblog
author_rank: Unknown
timestamp: July 28, 2010, 10:10:57 pm
content: Are you just talking about multimeters?If so then there have only been 4 basic types. Analog, VTVM, FET input analog, and today's Digitals.The first 3 are all the same, they essentially just differ in input impedance.Dave.

author: doctorm
author_rank: Regular Contributor
timestamp: July 28, 2010, 10:17:36 pm
content: no not really the types of multimeters but like it talks about what an ammeter is and how it was made and how it works and stuff and other measuring devices for sound, power, electricity, and such.

author: armandas
author_rank: Frequent Contributor
timestamp: July 29, 2010, 12:33:06 am
content: Definitely learn about the voltmeter and ammeter, or you're bound to measure current across a component

author: saturation
author_rank: Super Contributor
timestamp: July 29, 2010, 01:08:07 am
content: You don't need to know every type of meter, but the ammeter is the father ofalmostall analog meters. If you know how that works, its the basis by which every other analog meter is based on: voltmeter, ohmeter, dB meter, etc.,When you move to digital meters, the digital voltmeter is the father ofalmostall meters used in all kinds of tools.You don't have to put a lot of effort into reading about it, it might be better to make your own ammeter so you get a better feel for it so you have fun learning what you find dull by just reading.If you're new to electronics, the best way to get goobers of things to play with is to buy one of those 300 in one electronic labs.Quote from: doctorm on July 28, 2010, 10:17:36 pm

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 29, 2010, 02:33:11 am
content: Quote from: saturation on July 29, 2010, 01:08:07 amWhat about electrostatic voltmeters used in high voltage work?

author: saturation
author_rank: Super Contributor
timestamp: July 29, 2010, 11:25:23 am
content: You're right.. If its the old style Kelvin meter, it works like a capacitor with a movable plate, with the 'attractive' force balanced by a spring and thus allowing for a readout. Sorry for the large image, but I think it shows the brass and bluish plate nicely, the balance springs, etc., a verydelicateinstrument.This is unlike a galvanometer movement:But modern ESVM are amplified analog or digital, which then use as a readout an ammeter or the DVM.Quote from: NiHaoMike on July 29, 2010, 02:33:11 am

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 29, 2010, 01:40:59 pm
content: i love to read about history... about any technology, but not politics ok? i will know how human kind progress, so i can expect how i or current technology progress to the future... i still wonder actually... how the barbage machine works and how he got the idea.

author: DJPhil
author_rank: Frequent Contributor
timestamp: July 29, 2010, 02:34:14 pm
content: Quote from: shafri on July 29, 2010, 01:40:59 pmIn my opinion, nothing beats James Burke for technological history. One of his big fans putthe four major series that he did on youtube. I listen to these while I work all the time.Here's the bit on Babbage.Connections 3, Episode 2.Hope that helps.

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 29, 2010, 03:07:32 pm
content: Quote from: DJPhil on July 29, 2010, 02:34:14 pmi wish i have the time to sit for just a half an hour more frequently infront of discovery channel tv

author: saturation
author_rank: Super Contributor
timestamp: July 29, 2010, 05:23:31 pm
content: Since time is a resource you cannot get back after you use it up, its best to save or use it wisely as much as you can.For TV, find ways to get rid of the advertising by using a DVR or such or getting the shows as a DVD or bluray, in the USA, ads use 1/3 of every broadcast hour to advertise what you don't want to see. You can easily get several more hours per night to do something you really want to do.Most shows today, even rebroadcasted old shows, are shortened, often edited to squeeze less show, and more advertising out of it; a common example is changing the ending and opening credits to save time. I thus, almost never watch straight TV, but if I like a show, I will find DVR it, or wait for it on disc or watch it through a non-advertising sponsored way.http://en.wikipedia.org/wiki/Television_advertisement#FrequencyQuote from: shafri on July 29, 2010, 03:07:32 pm

author: qno
author_rank: Frequent Contributor
timestamp: July 29, 2010, 05:34:44 pm
content: There is also another type where the coil is stationary and iron attached to the needle is moving.One big advantage of this meter is that it always indicates RMS value AC & DC.I think it is called iron core movementThe galvanometer is an DC average meter and has long been a source of errors, measuring AC voltage and power.

author: Unknown
author_rank: Unknown
timestamp: July 29, 2010, 06:58:56 pm
content: There's also the differential voltmeter, which I believe was the instrument for accurate voltage measurements before the DVM came along.