Microchip Technology ARD00330 データシート

© 2011 Microchip Technology Inc.

DS51964A-page 35

2.4.4.1

EQUATIONS FOR CONFIGURATION C1 CALIBRATION – ACTIVE 
ENERGY AND ACTIVE POWER

Equations 2-13 to 2-17 represent the method for calculating the calibration, and the
correction factors after configuration

 

C1. The PC calibration software processes these

calculations automatically.
Equations 2-13 to 2-16 apply for calculating the proper output frequency of the CF 
output. See Section 2.4.4 “Flow Chart for C1 Configuration – Active Energy, 
Active Power Gain” for the meter input conditions.

Equations 2-16 and 2-17 are used for calculating the proper Gain/LSb registers in
calibration.

Note: Convert to a 16-bit unsigned integer for compatibility with the energy meter 

register and firmware calculations.

Note: Convert to a 16-bit unsigned integer for compatibility with the energy meter

register and firmware calculations.

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If GAIN>65535
Then,
GAIN_NUMR_ENERGY_ACT = GAIN / 2

GAIN_DENR_ENERGY_ACT = GAIN_DENR_ENERGY_ACT + 1
else,

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