Posted by No Body on September 4, 2013, 2:01 am
Some of the concernes you raise are addressed by this system:
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
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.
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:
and here are the bit assignments in English:
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.
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
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.
Posted by Martin Riddle on August 5, 2013, 11:08 pm
Labjack looks good too. I havent personally used them, but I've heard
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!