User Manual
Contents
1. 10 Frequency ZO Oy 3x1f 3x1d 1 v 3xid 3x10 Red Orange __ Yellow Green Bue violet uM EF m mm uu 14 1 6x10 0 8 Fig 1 the Infrared Radiation Spectreum Infrared just like any light ray is an Electromagnetic Radiation with lower frequency or longer wavelength than visual light Anything above absolute zero 273 15 degrees Celsius or O degrees Kelvin radiates in the infrared Even ice cube snow your refrigerator emit infrared The Stefan Boltzmann Law where the total radiation energy is proportional to the fourth power of the absolute temperature and Wien Displacement Law the product of the peak wavelength and the temperature is found to be a constant are implemented in the TNm infrared thermometer module The infrared radiation of measure target is collected by a infrared mirror through a IR filter of 5 or 8um cut in frequency to the infrared thermopile detector The detector signal will be amplified and digitalize by the low noise and high linearity OP and AD convertor The ambient temperature sensor usually included in the same package as the thermopile detector is set in the space near the optical system to detect the fast change of the ambient temperature The signal processing section receives the signals from these temperature sensors to calculate the target surface temperature by a mathematical algorithm TNO9 Infrared Thermometer Module ZZ NNNN 2 2 Features of Desig2. of View When the Distance is 10 inch then the measurement spot size is also 10 inch When the Distance is 20 inch then the measurement spot size is also 20 inch In other words the FOV Field of View is 26 6 x 2 53 2 degree Beware the Vignette Good Design No Vignette o Q e o o F CSS SSN Fig 3 Good Design Field of View TNO9 Infrared Thermometer Module Bad Design Vignette The Sensor see the edge of the housing So the measurement in fact is the averaging of the real target and the edge of housing Fig 4 Bad Design Field of View 2 4 Emissivity Understanding an object s emissivity or its characteristic radiance is a critical component in the proper handling of infrared measurements Concisely emissivity is the ratio of radiation emitted by a surface or blackbody and its theoretical radiation predicted from Planck s law A material s surface emissivity is measured by the amount of energy emitted when the surface is directly observed There are many variables that affect a specific object s emissivity such as the wavelength of interest field of view the geometric shape of the blackbody and temperature However for the purposes and applications of the infrared thermometer user a comprehensive table showing the emissivity at corresponding temperatures of various surfaces and objects is displayed TN9 Infrared Thermometer Module 3 Specification 3 1 Absolute Maximum Rating DC Su
3. 4 2 F Format of Messa 2 utate oer Sit basi e seh baled eee ae e oder iuda 13 4 ZZ EXAMPUl652 tado OT CRORE PERCE PT TN RT RENT bM t eeu 13 4 2 3 How to modify Emissivity How to write Emissivity into EEPROM 14 5 INTERFACE DEMO BOARD HUB D ccccscccsscccsccccssccsccccccccsscccscccccscess 15 6 INTERFACE PROGRAM FOR PC cccccssscsssccsccccscccccccccscccccccsccccscccseccess 16 TNO9 Infrared Thermometer Module Z TA 1 General Description This document describes the user guide of TNm Series TN0 TN9 Edition July 2004 Copyright All right reserved Reproduction in any manner in whole or in part is straightly prohibited without written permission This information contained in this document is subject to change without notice Limited Warranty This data sheet contains information specific to products manufactured at the time of its publication Contents herein do not constitute a warranty Trademark Acknowledgements All trademarks are the property of their respective owners TNO9 Infrared Thermometer Module lNY 2 Theory of Operation 2 1 Principles of Operation E 6 12 10 1 102 io t 10 10 10719 10712 10714 Wavelengih r 1 T T by 6 AMISIT T T T T T T T 1 3 f A Radio TV Micro Infrared Ultraviolet y rays 1 ra Cosmic Waves Waves Waves radiation radiation Y yx rays a gt TT T E T 1 Seconds 3Xx10 3x10 3X 10 3X
4. Return meas End of Message TNO9 Infrared Thermometer Module ZYYS 4 2 3 How to modify Emissivity How to write Emissivity into EEPROM Warning misuse may result in EEPROM other data modified this may destroy the calibration the device may become useless 1 This Infrared Thermometer module is calibrated for Emissivity 0 95 defaultly Most of Non metal material have emissivity near to 0 95 But the infrared emissivity of normal metal is much lower and may have to modify the setting of the module for certain application 2 The communication format and how to read data from DUT s CommuMode ItemCode HighByte LowByte CheckSum ItemCode HighByte LowByte CR total 40 clocks amp data 3 For write Emissivity to DUT the communication format is the same as read gt S HighByte Emissivity value 04H CheckSum ItemCode HighByte 04H CR Emissivity value HighByte hex 100 dec For example HighByte 5F hex 95 dec gt emissivity 95 dec 100 dec 0 95 keep the LowByte data 04 hex 4 The trick for write data to DUT is as below a Action pin need to be floating when we want to write data to DUT b As you know DUT will do routine data out by 40 clocks amp datas with communication format After the 40th clock DUT will pull the CLK amp DATA pin to weak high for waiting if there is External CPU want write data to DUT Please let External CPU start send 1st clock within the timing T1 after the 40th clo
5. TN9 Infrared Thermometer Module User Manual TNO9 Infrared Thermometer Module i Contents 1 GENERAL DESCRIPTION n epi nude ten o enc a nue 3 EDEFON JUbEY 2004 2 iid eost cit cad EAS CAR e Ert et l S ESCAR AT 3 2 LIHEORY OF OPERATIQON o uitoeedsse eiie i Eta eot iibea eu ER Uo ua eUda Coco ea Une E aen EA CR ER rave CERA 4 2 1 PRINCIPLES OF OPERATION 3 oerte cc ete aee tene e te ae eru nex red este duree Up eu teas Geeneectewae 4 2 2 FEATURES OF DESIGN ccsscccsssccsscccssccsscccscccsscessccessceesccessceesscessscescseussceuscensess 5 2 ADDO EA AAE E UU NU 6 ZA ENIISSIVIIY 2239747542235502 eE ET EE tate MUS A M M ELLO E E D So ML e A 7 3 SPECIFICATION aaraa ennea araa aaa aa esa a a a a E Eco Ea eU SNESE 8 3 1 ABSOLUTE MAXIMUM RATING ccccccsccsscccccsccesccsccsscesccscesccesseuscesccusceseesseesses 8 JDC CHARACTERISTICS 1721442 3 262 een ree tesa uet av cee tact terea ds tiie te E vete deep hen Te eeu d dva tut edad 8 3 3 MEASUREMENT SPECIFICATION ceceeeeeeeete ee ehe eene ee ese rese ee ese eee ee teer eese e 9 3 4 PIN ASSIGNMENT OF TNO END iacet rarus rete ee pEL E etu perdre ne perc XL E eer Pe EE RIO eto Eee 10 4 SERTAL OUTPUT iiie eese v eet Gag etco eun bea Cave eesab euet Cav et dean vo oed a cp aessa araoa ereas 11 A DYXPICAIEJIIAGERAVG s eei adosados os thao tuu LULA Sue LA bM Sule LA te tesa 11 LEMMING OP SPL 5 pesca AS sep rac seese n ec RE dunes SAR E06 S PN Ee MEE EE E DUAE 12
6. TNO TN9 has the same pin assignment E r Oy 012 00 z Fig 5 the Module External Drawing TNO9 Infrared Thermometer Module 4 Serial Output 4 1 Typical Diagram TTL Clock Data GND RS 232 or other Fig 6 Typical Diagram DUT to TTL Interface MCU V Vcc D Data C Clock 2KHz G GND A ActionKey When Pull Low the device will measure Tbb continuousely DUT is Output the data while MCU is receving the Data Note Data Pin is High when there is no data Time Out 2ms TNO9 Infrared Thermometer Module Tb 4 2 Timing of SPI CLOCK DATA CADER gt 0 1 sec Fig 7 Timing of SPI TNO9 Infrared Thermometer Module 0000 U M 4 2 1 Format of Message Tenu Tissus cx Item L 4CH Tobj Temperature of Object f 66H Tamb Ambient Temperature MSB 8 bit Data Msb LSB 8 bit Data Lsb Sum Item MSB LSB SUM CR ODH End of the message 4 2 2 Example 1 Object Tempurature ESRC Ee Item 4CH2 L the item code of Object tempurature Data MSB 14H LSB 2AH Real Tempurature Value Hex2Dec 142AH 16 273 15 49 475 C Sum CheckSum 4CH 14H 2AH 8AH Only Low Byte CR ODH Carriage Return means End of Message 2 Ambiant Tempurature 66 e es 5 Los Item 66H2 f the item code of Ambient tempurature Data MSB 12H LSB C3H Real Tempurature Value Hex2Dec 12C3H 16 273 15 27 03 C Sum CheckSum 66H 12H C3H 3BH Only Low Byte CR ODH Carriage
7. ck 5ms lt Tl lt 10ms c The frequency of CLK should be 2KHz d DUT will latch the data at negative edge of CLK so data should be ready before the negative edge of 1st writing clock 5 For example Emissivity 2 0 95 gt S 5F hex 04 hex BO hex CR Emissivity 0 80 gt S 50 hex 04 hex A7 hex CR 6 Finally how do we know write emmissivity success About 5 ms after you send CLK amp DATA to DUT completely DUT should have 3 kinds of response a DUT will send out the same data whcih External CPU had write to DUT We call this ECHO That means write emmissivity success b DUT will send out S FF hex FF hex CheckSum S FF FF CR That means DUT find data checksum error a wrong data receiving DUT will forget the data and you need to re write again c DUT have no response as above That means DUT don t get full 40 clocks Please check the clock amp data which control by External CPU Especially please make sure the T1 timing is right TNO9 Infrared Thermometer Module A 5 Interface Demo Board Hub D General Description Hub D is an Interface box with LCD for TN series This Box can work as an interface between the IRTm IRT Module and PC see Fig A Hub D has a 2 column character type LCD Display it can also work without the PC The Hub will show Tobj amp Tamb data from the IRTm continuously IRT module o j TNO TN9 Interface Demo Board Hub runni
8. n The TNm infrared thermometer module is specially designed for a high sensitivity high accuracy low noise and low power consumption A number of design features contribute to the performance MEMS thermopile detector and a high accurate ambient temperature compensation technics care used for the TNm infrared thermometer module developed a proprietary Infrared System On Chip device that integrates all hardware items onto one IC Using this innovative SoC technology TNm infrared thermometer module has become a highly affordable and compact product products can faithfully withstand a thermal shock of 10degC 18degF Our products are adept in maintaining accuracies under widely changing environmental conditions For example the errors from environmental changes of older IRTs can reach 1 6degC requiring up to 30 minutes to stabilize while TNm error differential is only 0 7degC needing only 7 minutes to restabilize TNm products operate from a 3 Volt power supply while many other older IRTs still require a 9 Volt supply has maintained a NIST or National Measurement Laboratory traceable Temperature Primary Standard All the TNm products are calibrated under traceable infrared standard sources The calibration data and serial number are saved in a EEPROM on the module TNO9 Infrared Thermometer Module SSS 2 3 Field of View What is D S 1 1 This device has a D S 1 1 Distance Spot 1 1 Fig 2 Field
9. ng a program T Tobj 99 6C lt Tamb 19 8C Data Power 5V Clock GND Power Hub Reset IRTm Reset Action Action O l U Fig 8 Typical Application of Hub Model No Hub D Program TNmDB001 exe Fig 9 Hub D TNO9 Infrared Thermometer Module 0000 U M 6 Interface Program for PC Program TNmDB001 exe a Free version for demostration can be download e Running under a DOS window in MS Windows environment This program will show Tbb Tobj Tamb Status of IRT Modification of the Emissivity degC degF unit change in degC degF continuously
10. pply Voltage V4 lt 7 0V Input Voltage Range Vin 0 5V to V 0 5V Note Stresses beyond those given in the Absolute Maximum Rating table may cause operational errors or damage to the device For normal operational conditions see AC DC Electrical Characteristics 3 2 DC Characteristics VDD 3 0V TA 25 O Operating Voltage VDD z 3 0V Operating Current Fopy 600KHz Standby Current VDD 3 0V Input High Level VDD 3 0V Input Low Level VDD 3 0V Output High I i VDD 3 0V Voy 2 4V Output Sink I VDD 3 0V Vo 0 8V Operating Voltage VDD z 4 5V Operating Current Fp 600KHz Standby Current VDD 4 5V Input High Level VDD 4 5V Input Low Level VDD 4 5V Output High I VDD 4 5V Vo 3 5V Output Sink I VDD 4 5V Vo 0 8V TNO9 Infrared Thermometer Module NYST 3 3 Measurement Specification 33 220 C 27 428 F 10 50 C 14 122 F 0 6 C 2 2 C 1 16 C 0 0625 fall range sec 1 1 0 01 1 step 01 1 4Hz 12x13 7x35mm 5um 14um 9g 3V or 5V TNO9 Infrared Thermometer Module 000 3 4 Pin Assignment of TN0 TN9 Warning The Dimension in this drawing is for reference only V Vdd G GND D Data Serial Data C Clock Serial Clock A Action Pin pull low to measure floating while to Write Data into the IRT Note
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