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AS8267 Datasheet(PDF) 134 Page - ams AG |
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AS8267 Datasheet(HTML) 134 Page - ams AG |
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134 / 136 page  Data Sheet AS8267 / AS8268 Revision 1.0, 19-Jun-07 Page 134 of 136 ) mconst ( Rate Pulse LED ) ref ( PR Ni = Where PR(ref) is the reference meter constant. LED Meter Constant (non-standard): The LED pulses are derived directly from the fast internal pulses (204,800i/kWh) and is specified using the parameter ‘mconst’ of SREG. If the target meter constant is different from one of the selectable (mconst) meter constants, the following formula applies: ) Na Ni lev _ Pulse Ideal ( × Where Ni is calculated using the Target Pulse Rate: Rate Pulse et arg T t tan Cons Meter ference Re Ni = NB: For mconst, select a pulse rate close to Target Pulse Rate, so that the Pulse_lev stays within reasonable limits. Temperature Sensor: The AS8267 / AS8268 ICs include an on-chip temperature sensor which allows for temperature correction over the entire operating temperature range of the device. The actual temperature value is calculated by the means of the following formula: [] 75 ) 193 . 0 corrected _ Temp ( C Temp − × = ° [] [ ] 0 : 15 orr TS_OffsetC 0 : 15 TS_Result cted Temp_corre + = |
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