View unanswered posts | View active topics It is currently Mon Jun 17, 2019 4:35 am



Reply to topic  [ 1 post ] 
 Use Utilite to Display and Record Digital Multimeter Data 
Author Message

Joined: Mon Jan 09, 2012 3:16 am
Posts: 351
Post Use Utilite to Display and Record Digital Multimeter Data
Overview

Digital Multimeters (DMMs) are quite useful pieces of test gear. Even relatively inexpensive units can often measure and display a wide variety of parameters beyond just voltage, current, and resistance. DMMs are great for taking instantaneous readings, and some offer basic storage in the form of hold, min, and max readings. However, many units do not provide any real data logging capability.

If you have a compatible DMM with a serial interface, QtDMM will enable your Utilite to display, log, and graph DMM data. This is a useful feature if you tying to log or trend a parameter over time.

For more information about QtDMM see:

http://www.mtoussaint.de/qtdmm.html



Software

QtDMM v8.13 is available in the Utilite Ubuntu repository. Newer versions are available if you are willing to build them yourself. See:

http://www.mtoussaint.de/qtdmm.html#download

Packages required by QtDMM include:

1. Qt
2. gcc



Hardware

1. Utilite
2. Compatible DMM (I am using RadioShack 22-812)
3. USB to Serial Converter (I am using Manhattan brand base on Prolific PL2303 chipset)

RadioShack 22-812 DMM
Attachment:
DMM.JPG
DMM.JPG [ 67.09 KiB | Viewed 2850 times ]




Test Setup

The test setup consists of a B&K Precision 3010 Function Generator serving as a variable voltage and frequency source for the DMM.

Test Setup
Attachment:
Test Setup.JPG
Test Setup.JPG [ 96.47 KiB | Viewed 2850 times ]




Results

QtDMM works quite nicely with Utilite. The performance was good. The picture below shows both AC Voltage and Frequency graphed over time.

Attachment:
Combined.jpg
Combined.jpg [ 245.19 KiB | Viewed 2850 times ]



Conclusions

1. QtDMM is a very useful where there is a need to log and graph data over time. This is a feature not normally associated with many DMMs.
2. Utilite again proves to be very useful in the test and measurement environment.


Tue Apr 21, 2015 2:37 am
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 1 post ] 

Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by STSoftware for PTF.