- posted
19 years ago
Question about remote read electric meters.
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19 years ago
They are polled by the meter reading device.
I haven't heard any from mine.
Mine is on the back of the house, facing the family room. And "patrolled" by a 125 pound dog that thinks it's a lap dog. Edison company decided to put a remote read unit in.
Jeff
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19 years ago
There are several systems - depending on the company making them. Most are spread spectrum - just like a cell phone - and work much the same way - they find a "hole" and put out a burst - which has several bytes of ID; a few bytes of data (the reading, problem code, etc.) then a CRC to ensure accuracy.
Most do (transmit every so often at random times) as they don't have a receiver to "hear" a poll command.
No more than any other communication device of similar operating frequency.
Our Rural Utility Billing software interfaces with one of the more popular remote read systems - Neptune's EZRoute system. One system using our software has 600+ meters so installed (out of 1400 system wide) and they haven't had any complaints about RFI.
best regards...
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19 years ago
Ditto. But there are also load control devices that do some routine two-way communications. You'd know if you had one installed.
Ditto again. I had some odd interference a while back and was suspect of the meter. I found they make them for various frequencies, plain jane 49 Mhz not being uncommon. I haven't seen any evidence of interference from mine. If there was, it would only be a burst of data less than a second when the reader 'keys' it.
They changed out all the old meters here in this community. They had been reading/billing every two months and the 'upgrade' allowed them to go to monthly billing. So as far as I know, everyone here has them.
-Bill M
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19 years ago
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19 years ago
There are a number of different systems, and more under development. Many are radio and microwave interrogated. 2.4 GHz is popular as one band. Some communicate over the wires.
Our rural Coop installed a remote reading system early last year, when their Chief Engineer was a friend of mine. Unfortunately, he moved on to a better job shortly afterwards, and the only information I got from him was that this system "modulates" the zero crossings of the 60 Hz to transmit and receive data. Funny thing, when this system went on line, several of my old line connected digital clocks started gaining time. In examining their circuits, I found that the capacitor specified by the chip manufacturer on the input line was left out of these designs. Adding the specified .001 eliminated the time gaining problem, but it confirmed, at least to me, that indeed, there are now more zero crossings for the clock to count than there used to be.
-- Crazy George Remove N O and S P A M imbedded in return address
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19 years ago
"Terry" originally posted in message news:777Uc.7684$ snipped-for-privacy@news20.bellglobal.com...
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Various posters have commented to this thread. Many thanks indeed for the information to all of you. Terry.