Recent content by dBeau

The meter is whatever model was supplied by the town. I think it's a Sensus. The sensor set-up is newer model of the one that Ed Cheung mentions. The older one was discontinued. The big difference between my circuit and Ed's is that Ed's uses the comparator's hysteresis to deal with the...

That's about what I just finished doing. If you google for "Ed Cheung water meter" you'll find his site with a description of how he did it. Mostly, I followed his design. I made a few changes to make it easier to calibrate without an oscilloscope and to make it a bit more tolerant to a noisy...

Did you happen to test the batteries? A few of the Ion devices I received had bad or near bad batteries out of the box.

Even better... http://tinyurl.com/3bj9kor

The PE653RC looks like a pretty nice device. I just glanced at the installation manual a bit to see what it had to offer. The biggest issue I can see for the installation would be figuring out how to enclose the wiring. I have a Pentair system (way more expensive) that includes a "load...

I monitor my pool pump with my Brultech ECM-1240. While I havent tried triggering an alarm from the data, I doubt it would be very hard. The change in power consumption is pretty obvious when things arent right.

You dont say much about which lamp modules or what kind of load, but I wont let that stop me from posting a reply ;) The SA lamp modules I have have an option for "local control" or something like that. This let you turn the load on using it's own switch (like a pull chain on a lamp). It...

While I'm far from an expert on the topic, I've been dreaming about the same sort of system for a while now.... As for the size of the "UPS" to run 3kw, you'd need a 3kw UPS (well plus a bit to account for start up current for large inductive loads). The size you might be thinking of though is...

What are you trying to do exactly? Elk doesnt document or support connecting to it's databus via RS485. If you really want to talk to the control, you should use the RS232 interface. That's documented and how Elk expects you to interact with the control. Now if you are trying to reverse...

If you think the Airport Express will fit your needs (it sounds to me like it would), you dont have to run it as a wireless device. Running a single cat 5 will be easier than any other wire you could run and a bit more useful too. I use of few of them around my home and they work great. The...

I have about 60 SA switches in total. Almost all are US2-40's and none make the buzzing noise you describe. However, I do have two US22-40's and both buzz even when there is no load. I cant help but to agree with the other posters regarding your use of the switches, but I really dont think...

The wiring is all correct. I've checked and double checked the polarity of the CTs. They are all fine. I've even verified each CT by watching the channel it was connected to while turning on a load. Each showed a reasonable increase on the appropriate channel. I did try turning nearly all...

I have three ECM-1240's watching over my breaker box. One channel monitors the load on the way into the breakers, then I have a CT on each of the 48 circuits leaving the box. The ECM-1240 Engine software has a cool feature where it subtracts all of outgoing loads from the incoming load and...

I have an elk setup with a bunch of Aprilaire 8870's. I'll make some guesses based on what I know about them. First if you wire both tr40 in parallel with your heating system, if either were to call for heat, you would get it. This alone might be what you want... but probably not. In a lot...

Did you buy the 8870's used too? The reason I asked you to show the results of the 'SN T?' command was twofold. First, to answer the obvious is it working question, but second, to check how the 8870's are addressed and if they have a name. The protocol supports naming the 8870's, but if they...