Microchip Technology ARD00330 データシート
Meter Calibration
© 2011 Microchip Technology Inc.
DS51964A-page 33
2.4.3
RMS Current, RMS Voltage, Signal Flow and Calibration
The RMS current and voltage outputs require a two-point calibration at configurations
C1 and C5. The automated software performs these calibrations, suggested on the
calibration values entered in the text boxes, as shown in Figure 2-16.
Table 2-2 and Figure 2-18 represent the registers that are set for RMS current and
voltage calibration.
C1 and C5. The automated software performs these calibrations, suggested on the
calibration values entered in the text boxes, as shown in Figure 2-16.
Table 2-2 and Figure 2-18 represent the registers that are set for RMS current and
voltage calibration.
TABLE 2-2:
RMS CURRENT, RMS VOLTAGE, CALIBRATION REGISTERS
FIGURE 2-18:
RMS Current and Voltage Flow.
Register
Equation
Configurations Required
OFFSET_V_RMS
C1, C5
OFFSET_I_RMS
C1, C5
GAIN_V_RMS
C1 ONLY
GAIN_I_RMS
C1 ONLY
X
2
Σ
OFFSET_I_RMS:16
X
2
Σ
OFFSET_V_RMS:16
ADC
ADC
CURRENT
VOLTAGE
RMS Current
RMS Voltage
X
V
X
A
GAIN_V_RMS:16
GAIN_I_RMS:16
I_RMS:16
RAW_I_RMS:16
V_RMS:16
RAW_V_RMS:16