SGX Infrared Gas Sensor Evaluation Kit IR
Contents
1. 2 saaaa BETARN BETA2N saaaa SETAON saaaa m m co efficient alpha aaa x 10 Sign A Channel A B Channel B co efficient alpha aaa x 10 Sign A Channel A B Channel B co efficient beta aaa x 10 Sign A Channel A B Channel B co efficient beta aaa x 10 Sign A Channel A B Channel B A Channel A B Channel B A Channel A B Channel B SUNSTARL http www sensor i c cori TEL 0755 83376549 FAX 0755 83376182 E MN L 525520 4163 con Set up December 2009 http sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L 525520 4163 17 Appendix China RoHS Declaration SUR Hazardous Substances or Elements El CIO RAM Component Chromium Poly IR EK2 Evaluation Kit Pb Hg Compounds brominated brominated Cd Cr6 Biphenyls Diphenyl PBB Ethers PBDE EN ral E Printed Circuit Assemblies DAS767434AA Evaluation Kit PCB SEE Be External Cables E100918 USB Lead as Power Supply Unit DAS766693AA Power Supply Unit FME Paper Manuals DF767801A Quick Start Guide SES HA CD Manual CD ROM Manual Software A EE SJ T 11363 2006 Bo F O In2. 12 uoc LED DLD D haaa 12 5 RO Er SWEN WN EE E EE 12 0121021715 6 Mme 13 OT MOU GI ee 13 62 Measurement MOQO mmm 13 E AAE Ei 13 RUA u un E s x 14 E TOGU e 14 52 OWS e E E A E E 14 ANS E A 15 9 naa A E E A S E A SA 16 10 C AU OO T EEN Sarat A A RR 17 11 17 12 Alarm Outputs and 18 13 RENE 18 14 Appendix Evaluation Kit PCB Schematic Diagram 19 15 Appendix Evaluation Kit PCB Parts List 20 16 Appendix Serial Message 2 000 0 0 00 21 17 Appendix China RoHS Declaration a 24 SGX Sensortec 0058 H SEA 6606077 E a EEA TETE I NT December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 1 Introduction Thank you for purchasing SGX Infrared Gas Sensors Evaluation SGX Infrared Gas Sensors are reliable and stable devices capable of detecting many different
3. December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 8 Channel Gains A gas sensing instrument normally has fixed channel gains However the IR EK2 is designed to operate with a wide range of sensors having different output levels so adjustable gain settings have been provided for optimum performance The channel gains should be adjusted after setting the lamp voltage as follows VRO Reference channel VR1 Active channel VR2 Active channel B These are best adjusted while monitoring the signals with an oscilloscope at the signal monitor PL3 Best performance will be obtained with the signals as high as possible However the circuit will clip at 3 V so a setting of about 2 V peak to peak is suggested 1 The channel amplifiers have frequency response shown right The gain is approximately 40 at 4 Hz when the variable resistors are at their minimum setting and all channels will have identical gain pe gt z 0 Lu cc O lt At the maximum setting channel gains will be around 400 but component tolerances may cause some small variation between channels FREQUENCY Hz If an oscilloscope is not available then the peak to peak levels are displayed on the Readings tab when in Measurement Mode However if the ADC measurement delay time is not correctly set
4. Press and release SW2 to reset the microcontroller This has the same function as removing and reconnecting the power supply PCB Layout IH Gas Sensor Evaluation Kit R EK2 www e2v com C L1 Bl m mt m 2 PJB c SGX Registarbe H 080697 FEL 0755 83376489 0755 83376182 255920963 CON December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 con 6 Operating Modes 6 1 Introduction The Evaluation Kit has two operating modes Measurement Mode and Device Setup Mode To switch between then click on the appropriate radio button near the top left hand panel of the screen 6 2 Measurement Mode In order to take readings from the Evaluation Kit it must be in Measurement Mode The PC Software will automatically switch the IR EK2 into Measurement Mode when it is first connected even if it was previously left in Device Setup Mode In Measurement Mode the Evaluation Kit sends readings to the PC once per second of the following Peak to peak signal Reference Channel Peak to peak signal Active Channel A Peak to peak signal Active Channel B Concentration Channel A Concentration Channel B Bulb voltage Temperature Only applicable to twin gas devices As the Evaluation Kit operates at a 4 Hz sig
5. SENSORTECH SGX Infrared Gas Sensor Evaluation Kit IR EK2 User Guide SGX fang 0806017 TEL 0755 83376489 FAX 0755 83376182 AS A78 AZARES hEN December 2009 SUSTARG 0D O OO http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L 525520 4163 con IMPORTANT INFORMATION Before using this product please read and understand all the instructions and warnings SGX Sensortech does not accept responsibility for damage or injury resulting from failure to follow the instructions provided WARNINGS The Evaluation Kit is S osortech in a safe condition Any unauthorised modifications may compromise safety and invalidate the warranty The supplied power supply adapter is double insulated indicated by the double square symbol the Evaluation kit is used with a power supply which is not double insulated connect a Protective Earthing Connection to the Protective Earth terminal on the PCB indicated by the Protective Earth symbol in case of power supply faults The Evaluation Kit is not certified as intrinsically safe and therefore must not be operated in potentially flammable or explosive atmospheres Neglecting the above may result in injury or death CAUTIONS The Evaluation Kit is intended for engineering development demonstration or evaluation purposes only It is not considered to be suitable for general
6. Channel 5 T 2 BVA From ADC EL at EHS T A DC USE INTERFACE Meet 1741 FW Sr KS BAL 33 PB Tra EN W Pu COLE Canut Ravi TXD8 L5 4 gu x EEPROM MEMORY PS TE LEAL Pa E 9 dX MSPA3BFZBIBTPM GREEN MICROCONTROLL ER JTAG PORT REDI z 3 ZH i i 3 n 5 p pz AST se fron es um LT 1 1 3 5 4533 RESET amp 5 S E s CoD z a x E LFS E EXPANSION PORT PLZ amp ava RI CREEN dy g e a input 54 3 C l T l 5 Duipui Input a Input 4 GREEN ay 188056 puis 5 3 Dol gt pP48 TR Dutputd BB CNS GREEN Epit 166856 p Daipul4 PL2 B ADBBIJARZ
7. GREEN gy KP IEBBSEL 0755 83376489 FAX 0755 83376186 Koa 25290 gl Qi December 2009 SGX Rdgishtidol d Yee Ao 0808707 TEL http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 con 15 Appendix Evaluation PCB Parts List Item Description Manufactuer PartNo Qty Reference Blank DPP767434AA Issue 2 Any manufacturer 11 H _ 02 Feet stick on black 11 1mm dia SJ5003BLACK HW2 HW3 HW4 HW5 Resistor 0603 0 063W 1 ORO Any manufacturer 2 R15 R20 Resistor 0603 0 063W 1 10R Any manufacturer 1 32 5 Resistor 0603 0 063W 1 100R Any manufacturer 5 R17 R18 R78 R79 R80 5 6 Resistor 0603 0 063W 1 470R Any manufacturer 5 R9 R10 R11 R12 R13 Resistor 0603 0 063W 196 2k2 Any manufacturer 6 R66 R67 R68 R75 R76 R77 8 Resistor 0603 0 063W 1 2k7 Any manufacturer 4 R5 R7 R8 9 Resistor 0603 0 063W 1 6k8 Any manufacturer 3 R60 R61 R62 10 Resistor 0603 0 063W 196 8k2 Any manufacturer R19 R23 R24 R69 R70 R71 R72 R73 R74 Resistor 0603 0 063W 196 47k Any manufacturer 4 1616 51 R52 R53 Resistor 0603 0 063W 196 100k Any manufacturer 7 R1 R2 R3 R4 R25 R30 R34 Resistor 0603 0 063W 196 360k Any manufacturer 3 R63 R64 R65 Resistor 0603 0 063W 1 820k Any manufacture
8. Setup Mode In the Coefficient Editor the following parameters can be set up S Single Single gas sensor plugged into 51 reference and one active channel ensor Channels u i Dual Dual gas sensor plugged into 52 reference and two active channels Time Delay ms There are three different types of temperature sensors fitted to e2v infrared gas sensors It is important to select the correct type so that the temperature readings are accurate Some sensors have no integrated temperature sensor and so the Temperature PCB mounted sensor should be selected The following options are available Sensor e External IC uses temperature sensor on the 2 e Internal Thermistor Twin Gas thermistor on twin gas devices e Internal Thermistor Single Gas thermistor on some single gas devices Internal IC sensor used on some single gas devices some of the calibration coefficients for measuring concentration over a wide range e g 100 2 will be slightly different to those used for a narrow range e g 5 2 to give the optimum accuracy The evaluation kit can store three sets of calibration coefficients for each gas channel The Select button allows you to select which range 1 in use Concentration The upper limit of each concentration range range ppm Note 1000 ppm 0 1 volume For more information about calibration coefficients and how to calculate them see Infrared Sensor A
9. TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 con 2 Quick Start Guide 1 Read the Manual a supplied CD should auto run on your PC when inserted into a CD drive b Select User Guide from the CD menu Before using this product please read and understand all the instructions and warnings SGX Sensortech does not accept responsibility for damage or injury resulting from failure to follow the instructions provided 2 Install the SGX Data Logging Software amp USB Drivers on your PC a Select Install Data Logging Software and USB Drivers from the CD menu b Follow the on screen instructions 3 Set up the Evaluation PCB a Plug an SGX infrared gas sensor into the Evaluation Kit 6 or 7 single gas devices plug into S1 8 pin twin gas devices plug into S2 b Adjust variable resistor VR3 fully anticlockwise minimum bulb voltage c Adjust variable resistors VRO VR1 VR2 fully anti clockwise minimum signal gains d Connect the supplied USB lead from SK5 to a USB socket on your PC 4 Connect the 9 V Power Supply Unit a Connect the DC output of the Power Supply Unit to SK4 b Slide the correct pinned mains adapter to the Power Supply Unit to suit the mains sockets in your country Plug in the Power Supply Unit Green LED D5 should be flashing Other LEDs may also come on c The PC may take a minute to recognise and initialise the new hardware drivers Basic Interfaces and Controls of Evaluati
10. consumer use and should be handled by people with suitable electronics training The Evaluation Kit contains electrostatic discharge sensitive devices Always observe handling precautions The Evaluation Kit and Gas Sensor Devices should always be used within their ratings as given in their data sheets COMPLIANCE The Evaluation Kit is intended for engineering development demonstration or evaluation purposes only and not for sale on the open market This Evaluation Kit has been tested but not certified and deemed to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules and European Union directives on electromagnetic compatibility These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications The user is responsible for providing reasonable protection against interference with other electronic equipment The Evaluation Kit is not intended for automotive use It does not contain protection devices against vehicle supply transient voltages and must not be used for the control of a vehicle a vehicular safety system or in a way that may disturb the driver data bus or statutory devices fitted to a vehicle ENVIRONMENTAL
11. gases as specified on individual device data sheets These devices can be used in many different applications and this Evaluation Kit from SGX will allow you to experiment and find the most suitable mode of operation for your particular use This Evaluation Kit allows you to Test 6 7 single gas sensor one 8 pin twin gas sensor Adjust the lamp drive voltage between 3 0 V and 5 0 V Adjust the channel gains for the reference and active channels Calibrate a gas sensor and measure gas concentration levels Set four alarm levels 2 per channel which drive on board LEDs and open collector outputs Drive two analogue outputs Connect additional circuits to an expansion port Log readings of peak to peak output signal gas concentration and temperature using the supplied PC Data Logging Program Contents of Evaluation kit Evaluation PCB Mains Power Adapter USB Lead CD containing User Manual e2v Data Logging Software and USB Drivers Gas Flow Hood Accessories Available e Additional gas flow hoods be ordered using the part number JAS767906AA If you are not familiar with the principles of gas detection using infrared absorption you are strongly recommended to read SGX Infrared Application Notes available at www SGX com SGX Sensorte 4 BAM ISAIP RG 8 00707 FEL 0755 83376489 FAX 0755 93376182 FMA h 5759209603 December 2009 SUSTARG 1 E E http www sensor i coni
12. up ra then these not accurate timing diagram shows that there is a delay between the bulb switching point and the maximum or minimum of the signal response This delay 1 typically around 20 25 ms but will depend on the model of gas sensor being used The delay is related to the a output level of the pyro devices and it may be e observed that when the bulb drive is reduced from 5 V to 3 V the delay time will increase slightly If an 8 9 oscilloscope is not available then a process of trial and error can be used to determine the optimum delay time On some sensors where there is a difference in output level between the active and reference channels there will be a difference in delay time for each channel In this situation the delay time should be set to the average value The following section explains how to set the ADC measurement delay time and other sensor specific parameters SGX SensortecPld SJ AR 888396 060690 7 AEL 0755 83376489 FAX 0755 83376188 CON December 2009 SUSTARG 1 E E http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 9 Sensor Set up Sensor specific settings are set up in the Coefficient Editor which can be found on the Calibration tab The Coefficent Editor can only be entered in Device
13. 100 120 10 160 180 200 220 240 eadin Interna I Thermistor Reading Twin Gas Update Rate 5 _ Clear Data Averaging Time s The USB interface to the Evaluation Kit appears as a virtual Port When the program is started the software will automatically detect which Com Port is being used for the USB connection If this does not happen a Com Port be manually selected by unticking Automatically search for connected device on the Hardware menu The Com Port can be manually selected using trial and error to identify the correct one If multiple Evaluation Kits are used at the same time a separate instance of the program should be started for each one it will be necessary to manually set each one to the correct Com Port The main screen gives a continuous display of gas concentration and temperature The graph view can be changed to display various parameters in real time The data can also be saved to a in csv format which can be read by most spreadsheet programs Note that many spreadsheets will read a maximum of 65536 lines 18 hours of data at 1 second intervals The measurement period be increased from 1 second to allow longer tests to be imported For example a 10 second measurement period allows 7 5 days of data to be read into a spreadsheet An averaging time can also be set to smooth out the data By default the datalogging software autoscales
14. 2 aaab aaab aaab EK2 CAx N1 00 Use PCB temperature sensor 01 Twin Gas Thermistor 02 IrxxEx Thermistor 03 LM60 internal to sensor IRxxGx B Channel B B Channel B aaaaaaa span concentration gas ppm aaaaaaa Sets concentration range to aaaaaaa ppm ACK ACK ACK Set up Set up ACK Set up ACK Set up Channel ACK B Channel B Set up ACK co efficient a aaa x 10 Set up ACK A Channel Set up B Channel B ACK Set up ACK Set up co efficient aaa x 10 Channel B Channel B co efficient aaa 10 ACK Set up A X A Channel A B Channel B SGX BAMISRESAG 08097 TEL 0755 83376489 FAX 0755 83376182 25520463 Set up pl December 2009 Set Alphapos coefficient Set Alphaneg coefficient Set Beta coefficient Set Betaneg coefficient Use medium concentration range parameters Use high concentration range parameters SGX Sensorte HEJA 8 0707 FEL 0755 83376489 0755 83376182 5755209 2 2 1 SETA 2 BETAS
15. 3 con 5 User Interfaces Controls and Indicators 5 1 Power Supply SK4 TB1 The Evaluation Kit requires a 9 V 10 power supply Either connect the supplied 9 V DC mains adapter to SK4 or a 9V 10 laboratory supply to the terminal block TB1 The supplied power supply adapter is double insulated indicated by the double Square symbol If the Evaluation Kit is used with a power supply which is not double insulated connect a Protective Earthing Connection to the Protective Earth terminal on the PCB indicated by the Protective Earth symbol in case of power supply faults 5 2 USB Interface SK5 SK5 is a type Mini USB connector for communicating with a PC 5 3 Gas Sensors Sockets 51 52 The Evaluation Kit can drive one gas sensor which should be fitted in either S1 or S2 as follows 51 6 or 7 pin single gas sensor 52 8 twin gas sensor 5 4 Signal Monitor PL3 PL3 is a signal monitor port It allows the amplified channel signals and the bulb drive control to be monitored on an oscilloscope Reference signal monitor Active 1 signal monitor Active 2 signal monitor OV Bulb control 3V3 logic 5 5 User Adjustments VRO VR1 VR2 VR3 VRO Reference channel gain adjust VR1 Active channel 1 gain adjust VR2 Active channel 2 gain adjust VR3 Lamp drive voltage 3 0 V to 5 0 5 6 JTAG Port PL1 The JTAG Port can be used by engineers wishing to develop their own software fo
16. 6549 FAX 0755 83376182 E L 525520 4163 con 16 Appendix Serial Message Protocol Enquire Status Command Response Available in Mode PCB WHO 2 aa bb dddd aa bb Software version Set up Software checksum dddd Serial number Lamp Lamp EK2 LMP ENQ EK2 LMP aaa aaa Lamp setting OFF ONX PLS Analog Out 2 DA1 ENQ 2 DA1 aaa bbb aaa DAC setting 000 FFF M00 M01 M02 DAC EK2 DA2 ENQ EK2 DA2 aaa bbb bbb DAC output 000 FFF individual cccccccc bbb Alarm setting MAN FOL 1GT 1LT Alarm threshold 0000000 1000000 m cccccccc cccccccc Alarms all 2 ALO ENQ EK2 ALO aaa bbb ccc Alarm 1 output ONX OFF Set up ddd Alarm 2 output ONX OFF Alarm 3 output ONX OFF Alarm 4 output ONX OFF Digital Inputs EK2 DIN ENQ EK2 DIN abcd Digital Input 1 status 0 1 Set up Digital Input 2 status 0 1 Digital Input 3 status 0 1 Digital Input 4 status 0 1 Calibration EK2 CAx ENQ EK2 CAx aaaaaaa Channel A or B Set up Table aaaaaaa aaaaaaa bbbc aaaaaaa Concentration range 3 for each chan bbbc bbbc ddde ddde ddde bbbc A coefficient bbb x 10 3 for each ch fgggh Immmn Immmn ddde N coefficient as above Immmn opppq opppq opppq fgggh Alphapos f as above rrrs tttu vvvvvvv WWW XXX y 2 Immmn Betapos Betaneg rrrs Zero to 3 significant figures tttu Span to 3 significant figur
17. 6549 FAX 0755 83376182 E MN L i TEL WAN sensor http 0 0 00 ic D Kit PCB Schemat ion Evaluat 14 Appendix 3V 5V LAMP SUPPLY DIGITAL DH BATS4C SUPPLY Lamp supply TM WAG 2286 Input winmsTaL TIG P8 Poe DE LDHI BT33E 4 ati Lanp Bk 2 Lag men i Aza 1822 1 8k2 22 2 I Sender damp a DO 7 E Nr ADGBZ3ARZ ADHEZHARZ P273 Pl a Ata 34 3 i cet 4 2 War Lamp iy xTI 32 7BBk iz SLIPPL 3v3 ngg3i28AIDUZT TWIM GAS SENSOR lamp pr 2 ADB ZSARZ 2 Signal Monitor av 7 048V DAC Ref PL3 Lomp whch f Act Channel 2 4 1 Active Zl 13 ZIP V e SINGLE GAS PS SENSOR ASE ADSBIQAREI RE R2H BRE ADUBZDART ay Channel 1 lActive 1 man ASE H28k 2 TEMPERATURE SENSOR Lee 53 2 2
18. 89 FAX 0755 83376182 Ke Vl 5659288 December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L 525520 4163 con Manual individual 1 4 all together 0 Follow digital inputs individual 1 4 all together 0 On if Channel a concentration is Greater Than bbbbbbbb individual 1 4 all together 0 On if Channel a concentration is Less Than bbbbbbbb individual 1 4 all together 0 Invalid command Calibration 2 AL3 MAN Set up NN PP ou 0 Ng 2 ALO Set up eq IMS OFF 2 AL2 MAN Set up eno Moo mme equ INS 100 L OFF equ INS k OFF emo MER o PP OFF EK2ALTFOL 2 Setup 2 AL2 FOL 2 ACK _ ACK Setup ACK LLL Setup ACK a Channel 1 or 2 bbbbbbbb bbbbbbbb G bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb G bbbbbbbb in bbbbbbbb bbbbbbbb bbbbbbbb ACK bbbbbbb Concentration ACK ACK ACK ACK Response command Response 2 CAL Sets the temp sensor type e g Set up Set temp senor type Set the zero Set the span Set span concentration gas Set number of sensor channels Set concentration Range Set A coefficient Set n coefficient Set n coefficient
19. Firmware Click Start Update Select the firmware file ir ek2 txt on the computer hard drive Click OK Warning Do not disconnect device during update When the progress bar has completed the installation is complete The new version number will be shown on the PC screen Please read any compatibility notes provided in the readme txt file supplied in the zip file It may be necessary to upgrade to a later version of PC software at the same time SGX A erro 7 TEL 0755 83376489 FAX 0755 83376182 AMA 2699 9063 gon December 2009
20. bration Before performing calibration the following activities should have already been completed Set lamp drive voltage VR3 Section 7 the channel gains VR1 VR2 Section 8 Set the sensor type temperature sensor type and coefficients Section 9 A two point calibration is performed by setting the zero and span levels when in Measurement Mode It is recommended that the Evaluation Kit be turned on and driving the sensor for at least 30 minutes so that the system can temperature stabilise before calibrating Set Zero A source of dry nitrogen should be used to set the zero level Once the gas is passing over the sensor press the Set Zero button on the Calibration tab Set Span A source of the target gas with known concentration is required to set the span Note that the concentration does not need to be the same as the span range The Span Concentration level in the Coefficient Editor should be adjusted to be equal to the concentration of the calibration gas Once the gas is passing over the sensor press the Set Span button on the Calibration tab Each zero and span calibration will take about 10 seconds as averaging is used to increase accuracy This period is independent of the averaging time set in the PC software The above procedure should be repeated for the second gas if a twin gas sensor is used The gas sensing system is now calibrated and the correct level of ga
21. dicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement in SJ T 11363 2006 XA RIP EAB FA a 25 ee SJ T 11363 2006 5j ar 22 X Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in SJ T11363 2006 SGX Registaree in Baylaedsito 0606707 TEL 0755 83376489 FAX 0755 83376182 c 5882068 9 December 2009 SUSTARG 0D O OO http www sensor i coni TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 con 18 Appendix Updating IR EK2 Embedded Software From time to time SGX may release updates to the PC datalogging software or the embedded software firmware which runs on the IR EK2 microprocessor These will normally be available for download from the SGX website www SGX com To install a new version of embedded software on the IR EK2 follow these instructions very carefully 1 10 Download the firmware zip file Unzip and save the text file ir ek2 txt to the computer hard drive Connect up the IR EK2 evaluation kit to the PC via the USB lead and connect the power Run the PC software installed from the supplied CD Make sure the device is shown as connected Change the mode to Device Setup Mode Select the Hardware menu then Update
22. e SGX Sensortech declares that the Evaluation Kit complies with EC directive 2002 95 EC the RoHS Directive restricting the use of certain RoHS hazardous materials in electrical and electronic equipment See section 17 for China RoHS information The Evaluation Kit is classified as Electronic and Electrical Equipment according to directive 2002 96 EC the WEEE Directive and should be segregated from domestic waste for disposal Contact your local SGX sales office for disposal instructions SGX 1 Registre rd 8990 0755 83376489 FAX 0755 83376182 E 25520463 ember 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L 525520 4163 con Contents 1 JJ ECT m 4 2 Quick Start Guide 5 Jj Using the SGX Data Logging Soflware 9 5 User Interfaces Controls and 11 Power TEI uu uuu nu un ua 11 SA DSP Omm mm 11 Do 11 54A im sm 11 5 5 User Adjustments VRO VR1 VR2 11 5 6 Port 1 11 EXO uo
23. es VVVVVVV Span gas concentration www Delay time ms XXX Current Range y Temp sensor type S or D single or duel type sensor 2 Zero Value 2 ZERO 2 ZERO X Channel A or B Set up greater ENQ aa aaaaaa aa aaaaaa Value to 6 decimal places accuracy Span Value EK2 CAx SPAN EK2 CAx SPAN X Channel A or B Set up greater aa aaaaaa Value to 6 decimal places accuracy SetLamp Command Respnse Lampof EK2LMPOFF Setup Lampon EK2LMPONX Setup _Lamp pulsing EK2LMPPLS ACK Command Respnse 404 Measurement EK2 SEN MEA Output every second aaaa Reference pk pk 1s mean 0000 FFFF Set up Mode EK2 SEN aaaa bbbb cccc hex ddddddd eeeeeee fffff gggg bbbb Active ChA pk pk 1s mean 0000 FFFF hex Active ChB 15 mean 0000 15 eeeeeee Concentration ChB 1s ppm fffff Temperature reading C 99 9 to 99 9 or ERR 9999 Bulb Voltage 1 mean 0000 SetupMode 2 SET SetDAC Command Response Automatic mode aa 00 Track reference ADC 02 Track Concentration Lasik M ip in mode individual 1 4 ONX ONX SGX Registered in 0808707 TEL 0755 833764
24. nal frequency the peak to peak and concentration readings are an average of the four measurements in the previous second 6 3 Device Setup Mode In order to change any of the programmable operating parameters of the Evaluation Kit it must be in Device Setup Mode In this mode it is possible to adjust all of the following Lamp mode pulsing off Sensor type single gas twin gas Temperature sensor type thermistor IC sampling delay time time from bulb change to ADC sampling Temperature compensation and calibration coefficients The following sections describe how all these parameters can be set up SGX Registered d Eiana No 0755 83376489 0755 83376182 FMA 2520463 ember 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 7 7 1 The Evaluation Kit drives the sensor lamp at a 4 Hz frequency This is the frequency recommended SGX for driving infrared gas sensors The lamp control waveform can be monitored on an oscilloscope at pin 7 pin 8 is 0 7 2 Voltage The lamp voltage can be changed on the circuit board by adjusting VR3 In Measurement Mode the lamp voltage is measured and displayed the Readings tab The adjustment range will cover at least 3 0 V to 5 0 V A 5 0 V lamp drive will give maximum infrared emission and the bes
25. nd monitoring of digital inputs See section 13 The Calibration tab allows calibration of sensor zero and span levels When in Device Setup Mode it also enables a number of important sensor settings to be sent to the Evaluation Kit see section 9 including e Selection of temperature sensor e ADC sampling delay time e Temperature compensation and calibration coefficients The Hardware menu contains an Update Firmware feature which allows software updates to be loaded into the microprocessor without having to return the PCB to SGX for reprogramming This feature should be used carefully following the instructions in section 18 SGX d 090407077 0755 83376489 FAX 0755 83376182 ReMi 1 365970069 December 2009 D E E http www 1 TEL 0755 83376549 FAX 0755 83376182 E MN L szss20 3163 con 4 Using HyperTerminal The SGX Data Logging software provides full control and monitoring of all the operation modes of the Evaluation Kit It is possible to communicate with the Evaluation Kit using the low level protocol This can be done manually using a terminal emulation program such as HyperTerminal or by writing your own PC software using a language such as Visual Basic or Labview The low level message protocol is given in the appendices to this manual To communicate with the Evaluation Kit using HyperTerminal use the following
26. on Kit 52 8 Pin 51 6 7 5 From SGX 4 PY 7 005 6311 5 December 2009 http www sensor i TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 Quick Start Guide Continued 5 Run the SGX Data Logging Software a program from the start menu b The software will automatically detect which Com Port is being used for the USB connection If this does not happen Com Port be manually selected by unticking Automatically search for connected device on the Hardware menu c The software will switch the Evaluation PCB into Automatic Mode so that readings are sent from the Evaluation Kit to the PC once every second d The outputs of the Evaluation Kit will now be displayed on the PC monitor 6 Set the Bulb Voltage and Channel Gains Select the Readings tab The bulb voltage is displayed Adjust VR3 clockwise to the desired Bulb Voltage between 3 V and 5 V c Adjust VRO to set the Reference level output Set to approximately 2 V peak to peak if possible The signal clips at 3 V d Adjust VR1 to set the Active level output in the same way e Adjust VR2 to set the Second Active level output in the same way only if using a twin gas sensor f If desired the channel outputs be observed an oscilloscope PL3 Congratulati
27. ons You are now evaluating SGX Infrared Gas Sensors 7 Further Settings At this stage you may not have correct temperature or concentration readings The software must be told which type of temperature sensor is being used A calibration will need to be performed to obtain accurate concentration readings To change any set up parameters the Evaluation Kit must be switched from Measurement Mode to Device Setup Mode using the PC Software Refer to the relevant sections of the User Guide for detailed instructions on how to do the above SGX Sensortea Ar bed FEL 0755 83376489 FAX 0755 83376182 FIA hi 26350 0162 December 2009 SUNSTAR http ww 1 c coni TEL 0755 83376549 FAX 0755 83376182 E MN L szss20G163 con 3 Using SGX Data Logging Software Follow the instruction in the Quick Start guide to get the software operating The screen should appear similar to that shown below IR Gas Sensor Evaluation Kit Version 0 09 Data Hardware Help eav Infra Red Gas Sensor Evaluation Data Logging Readings Calibration Engineering Production Setup System Configurations Device Connected M Data Logging Graph View Peak to Peak Reference sx Measurement Mode B Device Setup Mode Sensor Measurements Channel A 0 0000 Channel B 0 0000 Temperature 1 1 1 1 1 1 1 1 1 1 0 20 40 60 80
28. pplications Notes 2 and 5 available from www e2v com Span The concentration of the calibration gas used when performing the span calibration concentration Button Functions Concentration Range 1 2 3 Load File Loads a set of coefficients from the indicated file on the PC Refresh List Updates the list of available coefficient files Send to Unit sends the data from the Coefficient Editor to the Evaluation Kit Get Parameters From Reads the data currently stored in the Evaluation Kit and displays it on the Unit Coefficient Editor Save Data to File Saves the data from the Coefficient Editor to a file on the PC Exit Exits the Coefficient Editor When the software is installed coefficient files for a number of devices will be available on the PC See the e2v website for any updates if available These coefficients have typically been generated for a 5V bulb voltage but if a different lamp voltage delay time or change in electronics is used then the coefficients may not be accurate Customers are strongly advised to recalculate their own coefficients to suit the performance of their own instrument design See IR Application Notes on the SGX website for more information about coefficients SGX d 05 6608970772 055 6331 PS EHE 570716 5253209163 2 December 2009 D E E http www sensor i TEL 0755 83376549 FAX 0755 83376182 E MN L 525520063 con 10 Cali
29. procedure Note the USB Drivers must be installed e Run HyperTerminal from the Windows Start button e Enter a name and choose icon Connection Description Select the correct COM Port being used by the USB EER x Driver E Enter details for the phone number that you want to dial e Select 9600 Bits per second Baud 8 data bits no parity 1 stop bit no flow control SGX 660677 TEL 0755 83376489 FAX 0755 83376182 E Ms December 2009 SUSTARG 1 E E http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 e Select File Properties Click the Settings tab then the ASCII Setup button Ensure Echo typed characters locally is checked e WHO and a response should be received from the Evaluation Kit giving the firmware version and checksum HyperTerminal WHOITEK2 08 15 1F95 00001 on p E Note that if the Evaluation Kit is already set in Measurement Mode then a data packet will be displayed once per second A full list of HyperTerminal commands can be found in Section 16 SGX Sensorte d RC 0609007 TEL 0755 83376489 FAX 0755 83376186 69920869 con December 2009 D E E http www sensor i TEL 0755 83376549 FAX 0755 83376182 E MN L szss20 316
30. r 6 R54 R55 R56 R57 R58 R59 Resistor 0603 0 063W 0 1 25ppm 10k Any manufacturer 3 R21 R22 R29 Resistor 0805 0 1W 1 Any manufacturer 2 R28 R31 Resistor 1206 0 125W 1 10R Any manufacturer 11 R8 _ 0 Resistor Variable 20k 0 5W Multiturn 3296W 1 203LF VRO VR1 VR2 VR3 Capacitor Cer 0603 X7R 50V 10 10nF Any manufacturer 2 C17 C18 Capacitor Cer 0603 X7R 16V 10 82nF Any manufacturer 3 C57 C58 C59 21 Capacitor Cer 0603 X7R 50V 10 100nF Any manufacturer 1 C2 C4 C8 C12 C13 C15 C16 C20 C22 C24 C25 C26 C27 C28 C60 C61 C62 Capacitor Cer 0603 X7R 16V 10 1uF Any manufacturer 17 C9 C10 C11 C14 C51 C52 C53 C63 N 6 C1 C3 C29 C54 C55 C56 EEE1HA100SP 26 Diode Schottkyx2 SOT23 5 54 Any BATS4C 1 D 1 On Semi MBRS130LT3G 1 16 30 Diode Pack 5 6 500 57 59561 1 D8 1 7 off 52 8 off 20 9981045 20 7 Components not fitted Capacitor Ceramic 0603 o CH ResstrSMD003 1711 483 5 0 0805 712141 72 Crystal HC49 4H 111112 SGX d Gi 0860707 0755 83376489 FAX 0755 83376182 RA a 3699262 December 2009 http www sensor i cori TEL 0755 8337
31. r the Evaluation Board The socket will connect to a Texas Instruments MSP430 Debug Interface e g MSP FET430UIF for reprogramming and debugging TDO 1 2 VCCO TDI 3 4 VCCI TMS 5 6 Unused 7 8 Unused 0V 9 10 Unused 5 Unused Unused Unused SGX 8 806970778 O75 83370489 0755 8337618 5 48 ERK Version December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L 525520 4163 con 5 7 Expansion Port PL2 PL2 is an expansion port allowing connection to additional peripherals The port provides access to the input and 3 3 V supplies four open collector outputs four digital inputs two analogue outputs and a spare UART connection 3V3 Regulated Power 9 V Unregulated Power OV OV 3V3 logic 5 6 Output 1 3V3 logic 7 8 Output 2 3V3 logic 9 10 Output 3 Open collector 3V3 logic Output 4 Open collector OVA Analogue Output 1 0 to 2 048 V OVA Analogue Output 2 0 to 2 048 V Serial RXD 3V3 Serial TXD 3V3 OV Not used Input 1 Input 2 Input 3 Input 4 Open collector Open collector lt 5 8 LEDS D1 02 D3 D4 D5 D1 D2 D3 D4 indicate the state of each open collector output on the Expansion Port D5 flashes to indicate that the power is on and the software is operating normally 5 9 Reset Switch SW2
32. rnal voltage The 9 V input and 3V3 microcontroller supply are also available on the expansion connector for this purpose LED ON alarm enabled open collector driven low LED OFF alarm disabled open collector released high The Alarms tab is only visible when in Device Setup Mode Each of the four alarm outputs can be set to one of the following options e Monitor Gas The alarm can be set to come on when the concentration is above or below a particular concentration level on either Channel A or Channel B e Force Alarm ON e Force Alarm OFF e Follow Input The alarm will follow the value of the corresponding digital input used for testing Click Refresh Settings to read the current settings from the PCB Click Write All Alarm Settings to write new alarm settings to the PCB Note that when the alarms are set to monitor concentration levels they use the one second averaged values independent of what averaging is set on the PC data logging software 13 Digital Inputs Four digital inputs are provided on the expansion port PL2 They can be used by engineers writing their own application software to run on the Evaluation Kit The status of each digital input can be viewed on the I O tab which is only present in Device Setup Mode SGX ee Decani FEL 0755 83376489 0755 8337618 Foil 29990009 con December 2009 5755209163 con 0755 8337
33. s concentrations will be displayed on the PC screen 11 Analog Outputs The outputs of two 12 bit digital to analog converters DACs are provided on the expansion port PL2 Each analogue output is buffered by an operational amplifier and can give outputs in the range V 000 hex to 2 048 FFF hex The analog outputs can be configured on the I O tab which is only available in Device Setup Mode Button Functions Tab Write Value Fixes the DAC output at a fixed voltage level set on the PC Software Reference Pk Pk DAC tracks the Reference Peak to Peak value Note DAC 0 V 2 048 V output corresponds to 0 V 3 V input range Channel A B Pk Pk DAC tracks the Active Channel Peak to Peak value Note DAC 0 V 2 048 V output corresponds to 0 V 3 V input range Channel A B Conc DAC tracks the Concentration value Note DAC 0 V 2 048 V output corresponds to Zero Span input range SGX Sensorte A WY SRP Rs 0755 83376489 FAX 0755 83376182 bs 265500063 December 2009 http www sensor i cori TEL 0755 83376549 FAX 0755 83376182 E L szss20GL63 12 Alarm Outputs and LEDs Four open collector alarm outputs are provided on the expansion port PL2 Each alarm has an associated LED D1 D4 to indicate the status of the alarm output To use the open collector outputs a resistor or other load should be connected to the desired exte
34. t system performance Heat from the bulb will also the temperature of the optical reflector higher than ambient which is helpful in preventing condensation in humid environments For battery powered portable instruments the sensors can also be operated very successfully with a 3 0 V lamp drive Although the sensitivity to gas will be smaller the power consumption will be less and the bulb lifetime increased The graph below shows how the pyro outputs change with bulb voltage Normalised Output e N 2 5 3 3 5 4 4 5 5 5 5 Bulb Voltage Pyro Output Voltage vs Lamp Supply IR12GJ Active Channel Normalised at 5 0 V The bulb has a very low resistance when cold turned off This can cause a current surge at the instant of turn on which might be undesirable in certain applications This is mainly a problem when the equipment is turned on from cold once the bulb is being driven at 4 Hz it maintains some heat even when off to reduce this effect It is possible to monitor the bulb current by monitoring the voltage across R26 10R using test points P16 and P24 Some users reduce this current surge by biasing the bulb at about 0 4 V when off to keep it just warm This can be done on the IR EK2 by fitting a 330R 0805 resistor in the empty R27 position between VRO SGX Sensorte inf 0 082707 1 0755 83376489 FAX 0755 83376182 5 115 6 9206463
35. the output readings i e the graph axes expand to show all of the readings on x and y axes However it is possible to change these values in order to zoom in on certain readings SGX be 60900722 0755 83376489 0755 83376182 55320869 December 2009 O OOO http www 1 TEL 0755 83376549 FAX 0755 83376182 E MN L 525520463 con In the Data Logging tab right click the axis to be adjusted and untick Autoscale Marker Spacing gt Add Marker Delete Marker Resistance 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 This stops axis from automatically expanding The values in the axis can then be changed To do this double click on the value you wish to edit and adjust using the keypad 1 100009 109000 108000 107000 106000 105000 Resistance 104000 103000 102000 101000 100000 99000 7i 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1 50 100 150 201 250 300 350 400 450 500 550 600 650 700 750 Reading The Readings tab provides measurement and control of the bulb and measurement of channel peak to peaks and ratios described in section 7 and 8 The Alarms tab allows setting of alarm thresholds described in section 12 The I O tab only appears in Device Setup Mode and allows setting of analog outputs see section 11 a
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