參數(shù)資料
型號(hào): ADE7758
廠商: Analog Devices, Inc.
英文描述: Poly Phase Multifunction Energy Metering IC with Per Phase Information
中文描述: 多相多功能電能計(jì)量IC每相位信息
文件頁數(shù): 42/68頁
文件大?。?/td> 1584K
代理商: ADE7758
ADE7758
Rev. A | Page 42 of 68
START
CALIBRATE IRMS
OFFSET
CALIBRATE VRMS
OFFSET
MUST BE DONE
BEFORE VA GAIN
CALIBRATION
WATT AND VA
CAN BE CALIBRATED
SIMUTANEOUSLY @
PF = 1 BECAUSE THEY
HAVE SEPARATE PULSE OUTPUTS
ALL
PHASES
VA AND WATT
GAIN CAL
YES
NO
SET UP PULSE
OUTPUT FOR
A, B, OR C
CALIBRATE
WATT AND VA
GAIN @ PF = 1
ALL
PHASES
GAIN CAL
VAR
YES
NO
SET UP FOR
PHASE
A, B, OR C
CALIBRATE
VAR GAIN
@ PF = 0
ALL
PHASES
PH CAL
YES
NO
SET UP PULSE
OUTPUT FOR
A, B, OR C
CALIBRATE
PHASE
@ PF = 0.5
ALL PH VAR
OFFSET
CAL
YES
NO
SET UP PULSE
OUTPUT FOR
A, B, AND C
CALIBRATE
VAR OFFSET
@ I
MIN
ALL PH
WATT OFFSET
CAL
YES
NO
SET UP PULSE
OUTPUT FOR
A, B, AND C
CALIBRATE
WATT OFFSET
@ I
MIN
END
0
Figure 76. Calibration Using Pulse Output
Gain Calibration Using Pulse Output
Gain calibration is used for meter-to-meter gain adjustment,
APCF or VARCF output rate calibration, and determining the
Wh/LSB, VARh/LSB, and VAh/LSB constant. The registers used
for watt gain calibration are CFNUM (0x45), CFDEN (0x46),
and xWG (0x2A to 0x2C). Equations 32 through 34 show how
these registers affect the Wh/LSB constant and the APCF
pulses. For calibrating VAR gain, the registers in Equations 32
through 34 should be replaced by VARCFNUM (0x47),
VARCFDEN (0x48), and xVARG (0x2D to 0x2F). For VAGAIN,
they should be replaced by VARCFNUM (0x47), VARCFDEN
(0x48), and xVAG (0x30 to 0x32).
Figure 77 shows the steps for gain calibration of watts, VA, or
VAR using the pulse outputs.
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