Maxim Integrated 71M6541 Demo Board - Manual (Page 2)

71M6541 Demo Board REV 3.0 User’s Manual
2 Rev 4.0
Table of Contents
1 GETTING STARTED................................................................................................................................................ 5
1.1 General .................................................................................................................................................................... 5
1.2 Safety and ESD Notes ............................................................................................................................................ 5
1.3 Demo Kit Contents ................................................................................................................................................. 6
1.4 Demo Board Versions ............................................................................................................................................ 6
1.5 Compatibility ........................................................................................................................................................... 6
1.6 Suggested Equipment not Included ..................................................................................................................... 6
1.7 Demo Board Test Setup ......................................................................................................................................... 7
1.7.1 Power Supply Setup .......................................................................................................................................... 8
1.7.2 Cables for Serial Communication ...................................................................................................................... 8
1.7.3 Checking Operation ........................................................................................................................................... 9
1.7.4 Serial Connection Setup .................................................................................................................................... 9
1.8 Using the Demo Board ......................................................................................................................................... 10
1.8.1 Serial Command Language ............................................................................................................................. 11
1.8.2 Using the Demo Board for Energy Measurements .......................................................................................... 17
1.8.3 Adjusting the Kh Factor for the Demo Board ................................................................................................... 17
1.8.4 Adjusting the Demo Boards to Different SHUNT Resistors ............................................................................. 17
1.8.5 Using the Pre-Amplifier ................................................................................................................................... 17
1.8.6 Using Current Transformers (CTs) .................................................................................................................. 17
1.8.7 Implementing a Single-Phase 3-Wire Meter (EQU 1) ...................................................................................... 17
1.8.8 Adjusting the Demo Boards to Different Voltage-Dividers ............................................................................... 17
1.9 Calibration Parameters ........................................................................................................................................ 18
1.9.1 General Calibration Procedure ........................................................................................................................ 18
1.9.2 Calibration Macro File ..................................................................................................................................... 19
1.9.3 Updating the Demo Code (hex file) ................................................................................................................. 19
1.9.4 Updating Calibration Data in Flash or EEPROM ............................................................................................. 20
1.9.5 Loading the Code for the 71M6541 into the Demo Board ............................................................................... 20
1.9.6 The Programming Interface of the 71M6541 ................................................................................................... 22
1.10 Demo Code ........................................................................................................................................................ 23
1.10.1 Demo Code Description ............................................................................................................................... 23
1.10.2 Important MPU Addresses ........................................................................................................................... 23
1.10.3 LSB Values in CE Registers ........................................................................................................................ 30
1.10.4 Calculating IMAX and Kh ............................................................................................................................. 30
1.10.5 Determining the Type of 71M6x0x ............................................................................................................... 31
1.10.6 Communicating with the 71M6X0X .............................................................................................................. 32
1.10.7 Bootloader Feature ...................................................................................................................................... 32
2 APPLICATION INFORMATION ............................................................................................................................. 34
2.1 Sensor Connections and Equations ................................................................................................................... 34
2.1.1 Sensor Wiring .................................................................................................................................................. 34
2.1.2 Single-phase two-wire (EQU 0) ....................................................................................................................... 35
2.1.3 Single-phase three-wire (EQU 1) .................................................................................................................... 36
2.2 Calibration Theory ................................................................................................................................................ 37
2.2.1 Calibration with Three Measurements ............................................................................................................. 37
2.2.2 Calibration with Five Measurements ............................................................................................................... 38
2.3 Calibration Procedures ........................................................................................................................................ 40
2.3.1 Calibration Equipment ..................................................................................................................................... 40
2.3.2 Phase-by-Phase Calibration ............................................................................................................................ 40
2.3.3 Detailed Calibration Procedures ...................................................................................................................... 40
2.3.4 Calibration Procedure with Three Measurements ........................................................................................... 41