This is because most CTs (current transformers) are not calibrated properly by the device they're connected to. I used 3 different CTs on the same load in my setup and made sure they were reading about the same. With the ECM1240, you can adjust offsets to make the CT readings "just right" should they be off a bit when you get them.
I worked with the owner, and he does care about getting as correct values as possible and made his device very tweakable.
Marc
See http://www.etherbee.com/products/ECM1240/default.htm
and see what you can output with one of those guys:
http://marc.merlins.org/perso/linuxha/post_2010-08-13_Fine-grained-house-wide-power-monitoring-with-Brultech-ECM1240_-ecmread_py-_with-net-metering-support_-and-graphing-with-cacti.html
There is one caveat: you need windows for the initial setup, although I did it in vmware, maybe it works in wine too, but since then it's been running fine on linux (and it would work just the same on MacOS since it's a python script).
Marc
well, obviously the guy was deranged, but some of his points are valid.
The problem is that most countries rely on ever increasing population for their economy to strive and the politicians to do well (starting with social security that is not funded by people other than the ones who get the money).
The world clearly could do better with a decreasing population, but most governments encourage exactly the opposite, so indeed right now humans are going to spread until they've taken over all the resources available and at the expense of pretty much all other lifeforms on the planet.
I'll be dead before then, but thinking about it makes me sad.
since you're not a radio and hardware engineer, I guess it's not obvious to you that putting antennas and electronics for different frequencies does cost board space. It's not impossible but it's hard on a small phone and definitely more money.
Yes, I'd also love a phone that does it all, but they aren't exactly common. It's not just HTC, it's pretty much everyone.
What OS limitations?
I tether for free on my android phones, I can make them be an adhoc AP for people to connect through my phone, and of course the OS is multitasking.
I'm not sure you know what you're talking about, or I'm not understanding you.
"History is a tool used by politicians to justify their intentions." -- Ted Koppel