HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Jack Rupert, PE
User Rank
Platinum
Great Series
Jack Rupert, PE   3/17/2012 6:47:06 PM
NO RATINGS
Thanks for a very interesting refresher article.  I hope to see more of these in the future.  It's amazing what one tends to forget when it is not being used everyday.

Jon Titus
User Rank
Blogger
Re: calculation of LSB step size
Jon Titus   3/16/2012 10:39:15 AM
NO RATINGS
Yes, Paul, and I requested this correction a few weeks ago when another reader noted the incorrect units.  Sometimes symbols don't translate well from a Word document to the HTML.  I'll ask again--thanks for your reminder.

Paul-stl
User Rank
Iron
calculation of LSB step size
Paul-stl   3/16/2012 9:47:14 AM
NO RATINGS
1 saves
In your calculation of the LSB step size, you state that 10e-3 V /16383 steps = 0.610V.  Shouldn't this be 0.610 microVolts?

N. Christopher Perry
User Rank
Gold
Re: More good information.
N. Christopher Perry   3/8/2012 5:20:51 PM
NO RATINGS
Ouch....  Did you track down the offending party and box their ears?

Jon Titus
User Rank
Blogger
Re: More good information.
Jon Titus   3/8/2012 5:06:53 PM
NO RATINGS
Hi, Christopher.  You make a good point about sensor ranges, so I'll put it on my topic list for a column after I wrap up this series on data-acquisition.  You remind me that it's always good to start on a high range with an instrument and then change to a lower scale as appropriate. I once saw a bent needle on a Simpson VOM someone used to measure line power with a low-voltage setting. It almost made me cry.

N. Christopher Perry
User Rank
Gold
More good information.
N. Christopher Perry   3/8/2012 4:34:38 PM
NO RATINGS
Glad to see you presenting this.  I've often had to point this out to my junior engineers; now I can point them to this article.

On a parallel subject.  Are you going to discuss selecting sensor ranges relative to the measured value in question?  I've also encounter situations where the engineer selected something like a 0-100 psi pressure transducer to measure a varying pressure with a mean around 80 psi and then just assumed the occasional 100 psi spikes where as high as the signal got....  I was trained to select a sensor which put the nominal reading at ~50% of the sensor range if I was fairly sure of what I was measuring, and to use less of the range if there was more uncertainty in the measured quantity.

Nancy Golden
User Rank
Platinum
Great Information!
Nancy Golden   3/7/2012 5:07:21 PM
NO RATINGS

Very nice solution for utilizing the entire range available and increasing the apparent resolution – with a very cost effective and easy to implement solution. Thanks for another great article!

Jon Titus
User Rank
Blogger
Thank you
Jon Titus   3/7/2012 3:26:10 PM
NO RATINGS
Thanks for your kind words.  The third installment covers anti-aliasing filters and it should go live in a week or so.  Stay tuned. 

TJ McDermott
User Rank
Blogger
Adding to the toolbox
TJ McDermott   3/6/2012 8:47:25 PM
NO RATINGS
I share naperlou's statement; I'm going to add this series to my library.

naperlou
User Rank
Blogger
Gain
naperlou   3/6/2012 10:48:56 AM
NO RATINGS
Jon, good article.  This is a very useful bit of informaiton for deigners to have in their toolbox.



Partner Zone
Latest Analysis
Texas Instruments has produced an e-book intended to get you up to snuff on the Industrial Internet of Things.
A South African startup is combining recycled plastic with solar power to give underprivileged school children a stylish schoolbag that also supplies them with light to study by.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
Technology and global expansion are playing key roles in making manufacturing an attractive field for women to join, more than ever before, said the president of a woman-owned family of companies.
A few years ago, reshoring roared onto the scene as the next great movement in manufacturing, but the data so far reflect otherwise.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service