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| 型号： | 71M6511-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 53/115页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 71M6511 ENERGY METER |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | 71M6511 |
| 已供物品： | 2 个板，线缆，CD，电源 |
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71M6511/71M6511H Demo Board User’s Manual
2.2.5 CALIBRATING METERS WITH COMBINED CT AND SHUNT RESISTOR
In many cases it is desirable to discourage tampering by using two current sensors. Simple tampering
methods based on connecting the low side of the load to earth ground (neutral) can be detected by adding a
second current sensor in the neutral path, as shown in Figure 2-6.
In this configuration, the shunt resistor is connected to the IA channel while the current transformer is con-
nected to the IB channel of the 71M6511.
Calibrating this arrangement requires a few extra steps above the regular calibration. The calibration proce-
dure applies to the sensor arrangement described above (SHUNT = IA, CT = IB) and Demo Code 3.04.
Preparation:
1.
Set the meter equation field of the configuration RAM for EQU to zero using the command:
RI0=10
// EQU = 0; CE_EN =1; TMUX = 0;
2.
3.
4.
5.
6.
7.
For the sake of calculation, individual WRATE parameters for Pulse generation, i.e.
WRATE_SHUNT and WRATE_CT will be used.
It is also necessary to compute and estimate IMAX_SHUNT and IMAX_CT parameters for meter
billing purposes.
Using IMAX_SHUNT and VMAX , the energy calculations for channel A should be performed.
The energy calculations for channel B should be performed using IMAX_CT and VMAX .
The LSB values for measurements for W0SUM, W1SUM, VAR0SUM, VAR1SUM, I0SQSUM,
I1SQSUM, and V0SQSUM should be modified to compute the correct energy values. That is,
IMAX_SHUNT and IMAX_CT should be applied separately to individual channels based on the
sensor connections.
Before starting a calibration, all calibration factors must be in their default state, i.e. CAL_IA (0x08),
CAL_VA (0x09), CAL_IB (0x0A) must be +16384. PHADJ_A (0x0E) and PHADJ_B (0x0F) should
be zero.
LIVE
SHUNT
NEUT
CT
LOAD
71M6511
IB
IA
VA
V3P3
Figure 2-6: 71M6511 with Shunt and CT
Revision 5.4
? 2005-2007 TERIDIAN Semiconductor Corporation
Page: 53 of 115
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6511H | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Single-Phase Energy Meter IC |
| 71M6511H-DB | 功能描述:开发板和工具包 - 8051 71M6511H Demo Brd RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
| 71M6511H-IGT | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Single-Phase Energy Meter IC |
| 71M6511H-IGT/F | 功能描述:计量片上系统 - SoC Highly Integrated SoC w/MCU Core 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 |
| 71M6511H-IGTR | 制造商:Maxim Integrated Products 功能描述:RESID. HI PRECISION METR (1P, .1%) - Tape and Reel |
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