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| 型号： | 71M6511-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 55/115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
8.
9.
Adjust CAL_IB for the total error found in the accuracy test using the formula
CAL_IB = 16384 * (1 - error/100)
That is, if the chip reports an error of -2.5%, CAL_IB should be adjusted to a value of
(16384 * (1 - (-2.5/100)).
Since CAL_VA and CAL_IA have already been adjusted for channel A, these registers should not
be updated.
10. Retest for accuracy at several currents and phase angles.
After completing the calibration, the energy values W0SUM, based on VA*IA and W1SUM, based on VA*IB
are accessible to the MPU firmware. The pulse rate is controlled by W1SUM and determined by the
parameters selected for the CT channel (VA, IB). Differences between W0SUM and W1SUM, indicating
tampering, can be detected by the MPU for each accumulation interval.
The user has to customize the Demo Code to utilize the values obtained from the VA, IA,
and IB channels for proper calculation of tariffs.
Table 2-1 summarizes the important parameters used in the calibration procedure.
Channel,
Sensor
A, Shunt
Formulae
WASUM = VA*IA
I Measurement
Using
IMAX_SHUNT
Parameters
IMAX = IMAX_SHUNT
W Pulse
Generation
WASUM
VAR Pulse
Generation
VARASUM
Resistor
VARASUM = VA*IA
WRATE =
WRATE_SHUNT
B, CT
WBSUM = VA*IB
IMAX_SHUNT
IMAX = IMAX_CT
WBSUM
VARBSUM
VARBSUM = VA*IB
WRATE = WRATE_CT
Table 2-1: Calibration Summary
In Demo Code revision 3.05, the calibration procedure is simplified since separate IMAX parameters
for both channels are available. The calibration procedure, is as follows:
Calibrating for Shunt Resistor (Channel A):
1.
2.
3.
4.
Calculate IMAX for the shunt resistor ( IMAX_SHUNT ). This can be done by using the following
formula:
IMAX_SHUNT = Vi MAX /R SH
The Vi MAX value is the maximum analog input voltage for the channel, typically 177mV (RMS), and
R SH is the resistance value of the shunt resistor.
The value obtained for IMAX_SHUNT is stored at the MPU address 0x0A, using the CLI command
)A= IMAX_SHUNT
Compute WRATE_SHUNT based on IMAX_SHUNT and VMAX and the formula given in 1.8.2:
WRATE_SHUNT = ( IMAX_SHUNT * VMAX * 47.1132) / (Kh * In_8 * N ACC * X)
Use VMAX = 600V (RMS) for the 6511 Demo Board if the resistor divider for VA has not been
changed.
Update the WRATE register (at CE address 0x2D) with WRATE_SHUNT , using the command
]2D= WRATE_SHUNT.
Test for accuracy at 15A, 240V at phase angle 0, phase angle 60° and at phase angle –60°.
Revision 5.4
? 2005-2007 TERIDIAN Semiconductor Corporation
Page: 55 of 115
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相关代理商/技术参数 |
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|---|---|
| 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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