need help with getting a digital multimeter - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th February 2006, 09:52 AM   #11
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
the spec for the frequency range of voltage reading ability should look just like that for amplifiers. eg. 20Hz to 500Hz +0.5db -3db or something much superior to suit your requirements.

If you arrange to make comparisons of almost identical voltages then the response errors of the DMM can be almost eliminated to quite high frequencies. I use mine upto 200kHz but it's spec is to only 500Hz.
Asumming my sine wave generator is putting out nearly constant voltage as I sweep through the frequency range, I find that a 1990mV signal at 100Hz appears to have fallen to about 160mV when reading a 100kHz signal, but comparison negates that big apparent error.
__________________
regards Andrew T.
  Reply With Quote
Old 8th February 2006, 09:59 AM   #12
diyAudio Member
 
darkfenriz's Avatar
 
Join Date: Jun 2004
Location: Warsaw
Default Re: need help with getting a digital multimeter

Quote:
Originally posted by ad_breaker
.... so here's what I need: something that also measures low ohms, capacitance, and frequency and it MUST be able to do accurate AC voltage measurements over the 20hz-20khz range. RMS and a dB readout option would also be nice.
You forgot the most important: 'diode' buzzer (beep-beep).
Priceless tool when debugging circuits.
  Reply With Quote
Old 8th February 2006, 11:46 AM   #13
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
The Fluke 89 IV is a very nice meter but I think what you're really after is an AC test set AND a DVM. As has been pointed out, DVMs have their limitations at AC and the true RMS feature is rarely of use in audio. You might like to have a look at the Neutrik Minilyser.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 19th February 2006, 02:00 AM   #14
diyAudio Member
 
Join Date: Feb 2006
Location: Dundee
Default Frequency measuring multimeter

Hi guys,
in this day and age, there is no requirement to spend megabucks on test equipment.

The far East is falling over itself to provide cheap and accurate measuring kit.

This item would probably do the business for the original poster;

http://www.jaycarelectronics.co.uk/p...=&SUBCATID=546

A lot less than $200 and certainly seems to meet his requirements.

I've dealt with thios supplier and they are excellent.

HTH,
Sandy
  Reply With Quote
Old 19th February 2006, 02:13 AM   #15
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi ad_breaker,
Everything Hugo, EC8010 and AndrewT said.

Fluke makes about the only accurate handheld DMM out there. It is the only one that will hold it's calibration. I know you are not going to send your meter in every (even) two years for calibration.

Buy the Fluke. <- period

I worked as a calibration technician, this is a fact. I have some Fluke handhelds.

Sandy,
Sadly, no that meter can not be trusted. Many techs spend good $$ on bench meters. Mine was around $1,500. They can go higher too. There is very good reason to spend money on good test equipment. Think of it as an investment, not unless you only have to check if the mains are present, the fuse is good and the battery has voltage. Then all you need is a couple of test lights and a continuity tester.

-Chris
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Digital Multimeter recommendation tempoct Parts 67 4th November 2007 09:40 PM
Digital Multimeter accuracy? tempoct Parts 6 4th February 2006 04:58 PM
which is good DIgital auto range multimeter. boxedin Parts 8 23rd December 2005 03:57 PM
Digital Multimeter Extech? kaushama Parts 1 26th October 2005 05:20 PM
Digital Multimeter speedstar Digital Source 2 20th July 2004 02:56 PM


New To Site? Need Help?

All times are GMT. The time now is 01:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2