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AN2288 Datasheet(PDF) 21 Page - STMicroelectronics

Part # AN2288
Description  Single-phase energy meter with tamper detection based on ST7FLITE2x
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2288 Datasheet(HTML) 21 Page - STMicroelectronics

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AN2288
Software routines
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Figure 18. Lite timer interrupt routine (Cont’d)
A
Find out current peak,
voltage peak, frequency
and power factor
tampering detection by checking at
both phase and neutral current chan-
nel for 6 times after every 500ms
INS_POWER = V * I
TOTAL_POWER [GAIN] +/-=
INS_POWER
Pulse output according to
3200imp/kWh
Is count < 100 ?
yes
count++
no
count = 1
Gain_switching++
end
Data sent to PC GUI as request-
ed for different gain factor



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