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Sensor type for energy metering
Posted: Mon Jan 02, 2012 6:27 pm
by Hathor27
I'd like to read and log the amount of used electrical energy. From the sensor (energy meter) I get pulse-counts each minute.
Into which type of sensor should I log this value, for I could graph it as energy per time (rate) and/or total energy.
Further, how could I modify graphs then to display y-axis unit in kWh?...
Re: Sensor type for energy metering
Posted: Sun Jan 08, 2012 5:15 pm
by skyewright
Hathor27 wrote:I'd like to read and log the amount of used electrical energy. From the sensor (energy meter) I get pulse-counts each minute.
Into which type of sensor should I log this value, for I could graph it as energy per time (rate) and/or total energy.
Further, how could I modify graphs then to display y-axis unit in kWh?...
For anything non-standard use the "data" sensor type. That is totally 'generic'.
Your LED pulses are probably each 1Wh (at least that's pretty standard on UK meters).
I use "deltasum" with 1 hour 'buckets" to graph the number of Wh in an hour if I'm using Meteohub graphing.
If I'm using Meteoplug then I use the equivalent graphing feature, but in Meteoplug graph defeinitions you also have the opportunity for doing some maths.
Mosyly nowadays I use Meteoplug graphs...
Re: Sensor type for energy metering
Posted: Sun Jan 08, 2012 10:17 pm
by Hathor27
skyewright wrote:I use "deltasum" with 1 hour 'buckets" to graph the number of Wh in an hour if I'm using Meteohub graphing.
That's good
And how do you build the sum of the individual pulses?
Re: Sensor type for energy metering
Posted: Mon Jan 09, 2012 7:47 pm
by skyewright
Hathor27 wrote:skyewright wrote:I use "deltasum" with 1 hour 'buckets" to graph the number of Wh in an hour if I'm using Meteohub graphing.
That's good
And how do you build the sum of the individual pulses?
The data sensor that I use this with is an accumulating counter value.
If you are just delivering pulse counts, rather than a accumulating total, then maybe you could try "sum" instead of "deltasum"?
Re: Sensor type for energy metering
Posted: Tue Jan 10, 2012 10:59 pm
by Hathor27
skyewright wrote:If you are just delivering pulse counts, rather than a accumulating total, then maybe you could try "sum" instead of "deltasum"?
Thx - I will try it soon.
As I found by now, another approach would be the method I use for degree-days accumulation
(see
viewtopic.php?f=16&t=8457&p=11241#p11241)