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Category: Software

1- Is the ADE9078 has Energy Retentive memory after power off?

2-  what is the Enter Meter Constant(impulses/kWHr) in the Calibration_Tool? and how can I calculte the numer  ? 3- I am bit confusing about Enter Energy Accumulation Time(sec) When I try to use Energy Accumulation Time(sec)=10sec

it's work well but the result in wh not in Kwh

in this case it work fine and accurate  .

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But When I calculate Enter Energy Accumulation Time(sec) using this formula I think have misunderstanding EGY_Time = 1 (as it's Recomended )
ZX_RATE = 100 (50Hz)
Energy Accumulation Time(sec) = 0.02 sec

but the issue the energy  result  worng when I use Energy Conversion Constant ## Top Replies

• 1- Is the ADE9078 has Energy Retentive memory after power off?  NO micro needs to read and store before power loss. This should be a small value I recommend reading teh ADE9078 and storing in the micro every 1 second or so.

2-  what is the Enter Meter Constant(impulses/kWHr) in the Calibration_Tool? and how can I calculte the numer  ? This is either defined by some metering standard or you can chose one for example 1000 imp/Kwh this means if you apply 1000W for an hr you will get 1000 pulses from the cf pin.

3- I am bit confusing about Enter Energy Accumulation Time(sec) The ADE9078 can't accumulate for ever internally so you need to setup some time for teh energy to accumulate in teh ADE9078. you will get an IRW if enable that will indicate the energy accumulation is complete. this is used for calibration to determine teh KWH/LSB value and the number of half linecycles to accumulate.

4 what do you read from the KWHr register with these inputs. Don't forget to setup line cycle accumulation for the number of half line cycles required from 10sec. 10sec = egy_time+1 /ZX_rate in hz

(10sec * 100hz)-1  = 999

Dave

• Thanks very much Dave,
I appreciate your effort and patience with me