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PT100 RTD Evaluation Board User’s Guide

DS51607A-page 2

©

 2006 Microchip Technology Inc.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description

Represents

Examples

Arial font:

Italic characters

Referenced books

MPLAB

®

 IDE User’s Guide

Emphasized text

...is the 

only

 compiler...

Initial caps

A window

the Output window

A dialog

the Settings dialog

A menu selection

select Enable Programmer

Quotes

A field name in a window or 
dialog

“Save project before build”

Underlined, italic text with 
right angle bracket

A menu path

File>Save

Bold characters

A dialog button

Click

 OK

A tab

Click the 

Power

 tab

N‘Rnnnn

A number in verilog format, 
where N is the total number of 
digits, R is the radix and n is a 
digit.

4‘b0010, 2‘hF1

Text in angle brackets < >

A key on the keyboard

Press <Enter>, <F1>

Courier New font:

Plain Courier New

Sample source code

#define START

Filenames

autoexec.bat

File paths

c:\mcc18\h

Keywords

_asm, _endasm, static

Command-line options

-Opa+, -Opa-

Bit values

0, 1

Constants

0xFF, ‘A’

Italic Courier New

A variable argument

file

.o

, where 

file

 can be 

any valid filename

Square brackets [ ]

Optional arguments

mcc18 [options] 

file

 

[options]

Curly brackets and pipe 
character: { | }

Choice of mutually exclusive 
arguments; an OR selection

errorlevel {0|1}

Ellipses...

Replaces repeated text

var_name [, 
var_name...]

Represents code supplied by 
user

void main (void)
{ ...
}

Summary of Contents for PT100 RTD

Page 1: ...2006 Microchip Technology Inc DS51607A PT100 RTD Evaluation Board User s Guide...

Page 2: ...k of Microchip Technology Incorporated in the U S A All other trademarks mentioned herein are property of their respective companies 2006 Microchip Technology Incorporated Printed in the U S A All Rig...

Page 3: ...n 5 1 2 What is the PT100 RTD Evaluation Board 5 1 3 What the PT100 RTD Evaluation Board Kit Includes 5 Chapter 2 Installation and Operation 7 2 1 Introduction 7 2 2 Features 7 2 3 Getting Started 8 2...

Page 4: ...PT100 RTD Evaluation Board User s Guide DS51607A page iv 2006 Microchip Technology Inc NOTES...

Page 5: ...board Appendix A Schematic and Layouts Shows the schematic and layout diagrams for the PT100 RTD Evaluation Board Appendix B Bill Of Materials BOM Lists the parts used to build the PT100 RTD Evaluatio...

Page 6: ...d characters A dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle bra...

Page 7: ...nced Flash USB Microcontrollers with nanoWatt Technology DS39632 This data sheet provides detailed information regarding the PIC18F2455 2550 4455 4550 devices TC1070 TC1071 TC1187 Data Sheet 50 mA 100...

Page 8: ...E Technical Support Development Systems Information Line Customers should contact their distributor representative or field application engineer for support Local sales offices are also available to h...

Page 9: ...able Gain Amplifier PGA MCP6S26 is used to digitally switch between RTDs and increase the scale up to 32 times The output of the difference amplifier is connected to a 12 bit differential Analog to Di...

Page 10: ...PT100 RTD Evaluation Board User s Guide DS51607A page 6 2006 Microchip Technology Inc NOTES...

Page 11: ...face mount RTD to measure the PCB temperature In addition the user can connect and measure an external leaded RTD 2 3 or 4 Wire and configure the corresponding jumper to remotely measure temperature T...

Page 12: ...2 1 PT100 RTD Evaluation Board Simplified Block Diagram 2 3 1 Hardware Setup 1 Connect the USB cable to PC 2 To measure PCB temperature connect JP1 to Local RTD position and JP2 to RTD position FIGUR...

Page 13: ...ication as shown in Figure 2 3 FIGURE 2 3 Microsoft Excel Based GUI 2 Select Enable Disable for CH0 or CH1 Channel 0 and Channel 1 respectively 3 Select PGA gain ADC sampling rate and sampling buffer...

Page 14: ...ifferential ADC MCP3301 The digital data is read using PIC18F2550 and transmitted to PC using a USB interface 2 4 1 1 THE CONSTANT CURRENT SOURCE The constant current source uses a reference voltage o...

Page 15: ...ted to the differential amplifier The differential amplifier scales the PGA output The difference amplifier gain is shown in Equation 2 1 EQUATION 2 1 DIFFERENCE AMPLIFIER GAIN 2 4 1 3 THE GUI The GUI...

Page 16: ...PT100 RTD Evaluation Board User s Guide DS51607A page 12 2006 Microchip Technology Inc NOTES...

Page 17: ...p Technology Inc DS51607A page 13 Appendix A Schematic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the PT100 RTD Evaluation Board Board Schematic Board...

Page 18: ...PT100 RTD Evaluation Board User s Guide DS51607A page 14 2006 Microchip Technology Inc A 2 BOARD SCHEMATIC PAGE 1 M 2 1...

Page 19: ...Schematic and Layouts 2006 Microchip Technology Inc DS51607A page 15 A 3 BOARD SCHEMATIC PAGE 2 M...

Page 20: ...PT100 RTD Evaluation Board User s Guide DS51607A page 16 2006 Microchip Technology Inc A 4 BOARD TOP SILK SCREEN LAYER A 5 BOARD TOP LAYER BOARD EDGE BOARD EDGE...

Page 21: ...Schematic and Layouts 2006 Microchip Technology Inc DS51607A page 17 A 6 BOARD BOTTOM SILK A 7 BOARD BOTTOM LAYER...

Page 22: ...PT100 RTD Evaluation Board User s Guide DS51607A page 18 2006 Microchip Technology Inc NOTES...

Page 23: ...SB B 5 pin Cable 3ft phone 316 522 2002 http www store yahoo com ktusasys usbtomib 5pin html sales ktusasys com 1 J4 CONN TERM BLOCK 4POS 5MM PCB Phoenix Contact 1729034 2 JMP1 JMP2 3PIN 100 Straight...

Page 24: ...1 U3 Rail to Rail Input Output 10 MHz Op Amps Microchip Technology Inc MCP6024 I SL 1 U4 28 40 44 Pin High Performance Enhanced Flash USB microcontrollers with nanoWatt Technology Microchip Technolog...

Page 25: ...Bill Of Materials BOM 2006 Microchip Technology Inc DS51607A page 21 NOTES...

Page 26: ...3 China Shenzhen Tel 86 755 8203 2660 Fax 86 755 8203 1760 China Shunde Tel 86 757 2839 5507 Fax 86 757 2839 5571 China Wuhan Tel 86 27 5980 5300 Fax 86 27 5980 5118 China Xian Tel 86 29 8833 7250 Fax...

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