[Lowfer] Just joined the Smartmeter Club
Dexter McIntyre W4DEX
dexter.mc at gmail.com
Sun Apr 10 22:17:46 EDT 2011
Gary wrote:
> My wife informed me that we lost power for a while today and she saw a man walking across the yard carrying "something electrical." Well, we now have a Silver Springs Networks NIC 314 smart meter hanging on the side of the house. I've explored their website but have not yet found a data sheet for the 314. The 300 series seems to utilize the 2.2ghz and 902mhz ranges according to the data sheets. I am still looking for the 314.
>
>
Several smart meters that I have seen which communicate via RF have FCC
certification numbers printed somewhere on them. But I don't think you
will have QRM from any smart meter that used RF for reporting. The
meter that was previously on my residence transmitted around 915 MHz
when polled. Even when I was operating SSB or CW on 903 MHz I had no
QRM from the meter. That meter was replaced by a non RF smart meter
which as odd as it sounds is a real QRM generator. My new smart meter
transmits a 4 to 5 second data burst only when polled which is about
every 4 hours. From what I've learned the meter has an internal 100 amp
load which is toggled on and off with a data signal. This near
instantaneous load change on the distribution system is detected and
decoded by a unit located at the sub station which is about 3 miles
away. This fast load switching noises up the power line causing two of
my UPS units to switch, produces noise on a wired intercom and causes
X-10 units to switch randomly. The RF QRM produced covers from near DC
up through 160 meters, probably detectable even higher. But is only
last 4 to 5 seconds. I do faintly hear on the wired intercom at least
two other meters reporting.
And another thing. If I fail to pay my bill the utility can remotely
turn off my power. When the bill is paid they can remotely turn it back
on and still charge a reconnect fee even though the employee that use to
do the job now is out of work.
Dex
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