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| 型号： | 71M6543F-DB-CT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 39/91页 |
| 文件大小： | 0K |
| 描述： | DEMO BOARD 71M6543F-DB-CT |
| 标准包装： | 1 |
| 系列： | * |
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71M6543 Demo Board User’s Manual
Voltage
+60°
Positive
direction
Generating Energy
Current lags
voltage
(inductive )
Current
-60°
Current leads
voltage
(capacitive )
Voltage
Using Energy
Figure 2-2: Phase Angle Definitions
The calibration procedures described below should be followed after interfacing the voltage and current sensors
to the 71M6543F chip. When properly interfaced, the V3P3 power supply is connected to the meter neutral and
is the DC reference for each input. Each voltage and current waveform, as seen by the 71M6543F, is scaled to
be less than 250mV (peak).
2.2.3 CALIBRATION PROCEDURE WITH THREE MEASUREMENTS
Each phase is calibrated individually. The calibration procedure is as follows:
1)
2)
3)
4)
5)
6)
7)
8)
The calibration factors for all phases are reset to their default values, i.e. CAL_In = CAL_Vn = 16384,
and LCOMP2_n = 16384.
An RMS voltage V ideal consistent with the meter’s nominal voltage is applied, and the RMS reading
V actual of the meter is recorded. The voltage reading error Axv is determined as
Axv = (V actual - V ideal ) / V ideal
Apply the nominal load current at phase angles 0° and 60°, measure the Wh energy and record the er-
rors E 0 AND E 60 .
Calculate the new calibration factors CAL_In , CAL_Vn, and LCOMP2_n , using the formulae present-
ed in section 2.1.1 or using the spreadsheet presented in section 2.2.5.
Apply the new calibration factors CAL_In , CAL_Vn , and LCOMP2_n to the meter. The memory loca-
tions for these factors are given in section 1.9.1.
Test the meter at nominal current and, if desired, at lower and higher currents and various phase an-
gles to confirm the desired accuracy.
Store the new calibration factors CAL_In , CAL_Vn , and LCOMP2_n in the EEPROM or FLASH
memory of the meter. If the calibration is performed on a Teridian Demo Board, the methods involving
the command line interface, as shown in sections 1.9.3 and 1.9.4, can be used.
Repeat the steps 1 through 7 for each phase.
Tip: Step 2 and the energy measurement at 0° of step 3 can be combined into one step.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6543F-IGT/F | 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6543F-IGTR/F | 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6543FT-IGT/F | 制造商:Maxim Integrated Products 功能描述:ENERGY METER ICS - Rail/Tube |
| 71M6543FT-IGTR/F | 制造商:Maxim Integrated Products 功能描述:3-PHASE SOC, 64KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6543G | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation |
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