Microchip Technology ARD00330 データシート
Meter Calibration
© 2011 Microchip Technology Inc.
DS51964A-page 47
EQUATION 2-45:
For RMS LSb correction, apply Equations 2-46 to 2-49.
EQUATION 2-46:
EQUATION 2-47:
EQUATION 2-48:
EQUATION 2-49:
Note: Convert to a 16-bit signed 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.
Note: Convert to a 16-bit unsigned integer for compatibility with the energy meter
register and firmware calculations.
OFFSET_V_RMS
VR1 VR2
–
VG VG 1
–
⋅
-------------------------------
⎝
⎠
⎛
⎞ VR
2
–
65536
------------------------------------------------------
=
ILSb = Value from
based on I
MAX
value
VLSb = Value from
based on V
B
value
GAIN_I_RMS
IB
ILSb
------------
⎝
⎠
⎛
⎞
IR1
65536
---------------
OFFSET_I_RMS
+
------------------------------------------------------------------- 32768
⋅
=
GAIN_V_RMS
VB
VLSb
--------------
⎝
⎠
⎛
⎞
VR1
65536
---------------
OFFSET_V_RMS
+
--------------------------------------------------------------------- 32768
⋅
=