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Data Logger for a Solar System - Page 2

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Posted by No Body on September 4, 2013, 2:01 am
 

John...

Some of the concernes you raise are addressed by this system:

<https://shop.ruggedcircuits.com/index.php?main_page=product_info&products_id#>  


I will often used Dallas/Maxim One-wire devices, if the temps are in a
range that they will deal with..

Then again.. a data logger for an entire Solar System.. That's one big
honkin machine!

:-)


Posted by Jim Wilkins on September 4, 2013, 12:12 pm
 

Neon John's comments seem to apply more to a LabJack than an Arduino.
http://labjack.com/u3  

I've been using an older Radio Shack PC-interfaced multimeter to log  
solar panel output. It's only one slow channel, but it's opto-isolated  
for safety and ground-loop immunity and can read AC or DC voltage and  
current, up to 20A. The newer model also reads temperature. There are  
several less expensive versions on-line.

This decodes the serial data stream:
http://www.franksteinberg.de/SOURCE/DT9062.BAS  

and here are the bit assignments in English:
http://www.multimeterwarehouse.com/TP4000ZC/TP4000ZC_serial_protocol.pdf  

I've ordered one of the cheaper ones to see if I can put together a  
3-channel laptop datalogger using the included software or a Basic  
program and a Cardbus dual serial port.

When I was building electric vehicles I used a Campbell Scientific  
datalogger to record test runs.
http://www.campbellsci.com/  

jsw



Posted by Jim Wilkins on September 9, 2013, 1:27 pm
 
Scratch off the clunky included software which is for one meter only.  
My QBasic test code that reads the older RS meter runs slowly in XP,  
so this will be a DOS project, maybe using the two multimeters as  
opto-isolated current sensors and my DI-194RS datalogger for DC  
voltages.
http://www.dataq.com/products/obsolete/di194.html  

Windows 7 includes a 6.22-style DOS that handles NTFS and long  
filenames. I found it while exploring POWERCFG options and piped the  
 >HELP output to a file to start a manual for it.
jsw  



Posted by Martin Riddle on August 5, 2013, 11:08 pm
 

Labjack looks good too. I havent personally used them, but I've heard
good things...
<http://labjack.com/>  

Cheers

Posted by Mr Clarke on August 7, 2013, 7:41 pm
 

You make it and I`ll make a better one and sell millions of them!  



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