e2v Metal Oxide Semiconductor (MOS) Gas Sensor
Contents
1. cs Pad T NNF 4 POWER SUPPLIES S Is a1 CS EN e sp Hin H BEE dee cS MBPSIJALT2G TANEET ope eee EEPROM Z affer ae mi pf Zum wc 2 e c me MEMORY L E REFSIZAMDEZT Wi e l t SS 3 62 pi lea 59 be f7 Bs jas B ba Bz F pe a KH 1 a G u n ca Ki 1 2 S GE GE ce Bn ec rn vor Gye 7 048 pReRSifERE GEE EE ES ZSLCBSOA 1 SN i Co E ERR Ae goe BEER RE FE EZ ji IBu SHY ey GE 3 ce KM DER SE HES fae wt i i ae el Ree ae el Kee H ee 5 48 oo am BE a ee abe TI EH PS GVUCEICLE UCABTE vsa Anu lputl Ped daa i i Ps acasa uEEcL JP An_Outpuiz PESSAC 45 iv EA S F3 vireg EEDA ge KM DALA i Lin S psacce revucacur EE pia vn PERATIA VENEN 43 attsaier 32 756kH2 EI ees moe E al rele Sal ic uns FE d CHANNEL 1 SIS pase S ag 2 040y me ji san A8 DS Sansorl cath te w ua W5P43AF 2616 TP nenn HE a vr G zer Wu 5ay T G re d av Se fv MICROCONTROLLER F maa e P4 artez LP2905A1W5 5 5 HOPA an Du AH dala e EL etELE span 7 PB k paa a ae G if TEMP SENSOR eee gen TTAG PORT F2. Automatically search for connected device on the Hardware menu The outputs of the Evaluation Kit will now be displayed on the PC monitor Congratulations You are now evaluating e2v Metal Oxide Semiconductor Gas Sensors Please refer to the full User Guide on the CD for more detailed instructions e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 5 Quick Start Guide Continued Basic Interfaces and Controls of Evaluation Kit Using MICS Sensors with the Evaluation Kit Leaded Sensors Automatic operation Part No Type Gases Power SW1 1 if fitted in SK1 SW 1 2 if fitted in SK2 MICS 2610 Leaded Single Ozone High ON MICS 2611 Leaded Single Ozone High ON MICS 2710 Leaded Single NO2 Low OFF MICS 5121 Leaded Single CO HC VOC High ON MICS 5132 Leaded Single CO HC VOC High ON MICS 5135 Leaded Single CO HC VOC High ON MICS 5521 Leaded Single CO HC VOC High ON MICS 5525 Leaded Single CO HC VOC High ON SMD Sensors Part No Type Gases Power SW1 1 SW1 2 MICS 2614 SMD Single Ozone High ON ON MICS 4614 SMD Dual E High ON ON Ozone High MICS 2714 SMD Single NO2 Low OFF OFF NO2 Low MICS 4514 SMD Dual COIHCIVOC High OFF ON MICS 5134 SMD Single CO HC VOC High ON ON MICS 5524 SMD Single CO HC VOC High ON ON MICS 5914 SMD Single NH3 Medium ON ON Evaluation Ki
3. Additional Alarm FUNCION EE 20 10 Re Te EE 21 10 1 tree Uerde ET 21 10 2 Software Reading of Digital Inputs 2 2 0 ec eee eet erent ee ern e eee teeta nner ee nants eeeaeeesenaeeeeennaeeeeeeaas 21 11 INDIEI OUUPUNS sot occ fences decisis EE 22 Introduction EEN 22 Software Control of Analog OUtpUtS ec cct eee ette a A ERA 22 12 Appendix Evaluation Kit PCB Schematic Diagram c seeseeeeeeeeeeeeeeeeeeeeseeeseeeeeeeeeeeeeeeeeeees 23 13 Appendix Evaluation Kit PCB Parts let 24 14 Appendix SMD Adapter PCB Schematic and Legend 25 15 Appendix Serial Message Protocol Ennn EEEE EEEE EEEE EEEE E EEEE E EEEE E EEEE 26 16 Appendix China RoHS Decaratton eeen eee etere teer teer tresn nner nnn rnent ennn nnn ennnen nnne nn nennen 28 17 Appendix Updating the MICS EK1 Embedded Software 0 eeeeeeeseeeeeeeseeeeeeeeeeeeeeeeeeees 29 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 3 1 Introduction Thank you for purchasing the e2v Metal Oxide Semiconductor MOS Gas Sensors Evaluation Kit e2v MOS Gas Sensors are low power low cost devices capable of detecting a range of gases These devices can be used in many different applications and this Evaluation Kit from e2v will allow you to experiment and find the most suitable mode of operation for your particular use This Evaluation Kit allows you to e Test two leaded sensors or one single d
4. EK1 ALO MAN ONX ACK Manual Off EK1 AL1 MAN OFF ACK individual 1 4 EK1 AL2 MAN OFF ACK all together 0 EK1 AL3 MAN OFF ACK EK1 AL4 MAN OFF ACK EK1 ALO MAN OFF ACK Follow digital EK1 AL1 FOL ACK inputs EK1 AL2 FOL ACK individual 1 4 EK1 AL3 FOL ACK all together 0 EK1 AL4 FOL ACK EK1 ALO FOL ACK On if Sensor a EK1 AL1 aGT bbbbbbbb ACK a Sensor 1 or 2 resistance is IERT AL2 aGT bbbbbbbb ACK bbbbbbbb Resistance Ohms 00000000 99999999 decimal Greater Than EK1 AL3 aGT bbbbbbbb ACK bbbbbbbb EK1 AL4 aGT bbbbbbbb ACK individual 1 4 EK1 ALO aGT bbbbbbbb ACK all together 0 On if Sensor a EK1 AL1 aLT bbbbbbbb ACK resistance is EK1 AL2 aLT bbbbbbbb ACK Less Than EK1 AL3 aLT bbbbbbbb ACK bbbbbbbb EK1 AL4 aLT bbbbbbbb ACK individual 1 4 EK1 ALO aLT bbbbbbbb ACK all together 0 Rate Alarm EK1 AL1 aUP cc d ACK a Sensor 1 or 2 Increasing EK1 AL2 aUP cc d ACK cc Percentage change to activate alarm 01 99 decimal resistance EK1 AL3 aUP cc d ACK d Time seconds in which this occurs 1 8 decimal individual 1 4 EK1 AL4 aUP cc d ACK all together 0 EK1 AL5 aUP cc d ACK Rate Alarm EK1 AL1 aDN cc d ACK a Sensor 1 or 2 Decreasing EK1 AL2 aDN cc d ACK cc Percentage change to activate alarm 01 99 decimal resistance EK1 AL3 aDN cc d ACK d Time seconds in which this occurs 1 8 decimal individual 1 4 EK1 ALA aDN
5. Heater 2 Command EK EK1 response ACK Advanced tab Heaters Sensor1 manual settings Auto Heaters button Advanced tab Heaters Sensor2 manual settings Auto Heaters button The high period in seconds should be entered as Auto Period Document subject to disclaimer on page 1 DAS766841AA Version 2 page 14 6 3 Multiple Power Levels A simplified diagram of the heater control circuit is shown below 9V Ra Rb Rc and Rd are plug in leaded resistors The high power setting is defined by Heater1 Heater2 Heater 1 Rb onor SR Heater 2 Rc The low power setting is defined by Heater 1 Ra Rb Heater 2 Rc Rd As supplied Ra Rd 51R and Rb Rc 82R Overheat1 Overheat2 With these resistors high power is set at about 76mW and low power at 43mW The heater drive resistors can be switched in parallel to drive a single sensor at four different levels in position SK1 only Position SK2 should be left empty and switch SW1 3 should be closed in order to force the four plug in resistors into a parallel formation The four combinations of Overheat1 and Overheat2 control lines can be used to give four different resistance values which should be calculated for the particular application The following table shows the power outputs for a particular set of resistance values Ra 27R Rb 100R Rc 220R Rd not fitted infinity Overheat1 Overheat2 Resulting Res
6. and choose an icon for the connection Name e2v Icon Cancel e Select the correct COM Port being used by the USB 21x Driver x e2y Enter details for the phone number that you want to dial Country region United Kingdom 44 Area code or 245 Phone number Connect using z Cancel e Select 9600 Bits per second Baud 8 data bits no EX parity 1 stop bit no flow control Port Settings Bits per second so YS Data bits fe y Parity Jones Stopbits i sl Flow control Restore Defaults Cancel Apply e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 9 e Select File Properties Click the Settings tab then the ASCII Setup button Ensure Echo typed characters locally is checked e2y HyperTerminal File Edit View Call Transfer Help Del ls aa 21x ConnectTo Settings ASCII Set KE Function anow and ctl keys act as CONN 21 x Terminalkeys Windows keys p ASCII Sending J Send line ends with line feeds p Backspace key sends I Echo typed characters locally Ze e c Cal Del Ctrl H Space Ctrl H ag fo EE Emulation Character delay fo milliseconds Auto detect zl Terminal Setup Telnet terminal ID ANSI f ASCII Receiving T Append line feeds to incoming line ends Backscroll buffer Ines 500 H Force incoming data to 7 bt ASCII I Play sound w
7. external voltage The 9V 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 Each alarm can be programmed in software to be enabled above or below a specified resistance 9 2 Software Control of Alarm outputs Force alarm output ON OFF or FOLLOW digital inputs examples of each command e HyperTerminal Alarm 1 Command EK1 AL1 MAN ONX Or EK1 AL1 MAN OFF Or EK1 AL1 FOL EK1 response ACK e e2v Datalogger Alarms Tab Use buttons in New Settings Set automatic alarm threshold examples showing threshold settings e HyperTerminal Alarm 1 Command EK1 AL1 aaa bbbbbbbb EK1 response ACK aaa Sensor association and function 1GT Alarm when Sensor 1 resistance 2 bbbbbbbb 1LT Alarm when Sensor 1 resistance lt bbbbbbbb 2GT Alarm when Sensor 2 resistance 2 bbbbbbbb 2LT Alarm when Sensor 2 resistance lt bbbbbbbb e e2v Datalogger Alarms Tab Use buttons in New Settings Read individual alarm conditions Enquire Status e HyperTerminal Alarm 1 Command EK1 AL1 ENQ EK1 response EK1 AL1 aaa bbb cccccccc aaa Alarm status ONX OFF bbb Alarm setting MAN FOL 1GT 1LT 2GT 2LT cccccccc Alarm threshold 00000000 99999999 dec e e2v Datalogger The status of th
8. 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 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 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 MOS 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 ge
9. 0 Way 2 54mm Harwin M20 9981045 1 PL2 37 Fuse Polyswitch 500mA Hold Tyco MICROSMDO50F 1 F1 38 Terminal Block 2 Way Elkay 15001 2 1 TB1 39 Switch DIP 4 Way APEM M404SMGNL 1 SW A0 Switch Push button SMD C amp K KSR221G LFS 1 SW2 41 Crystal SMD 32 768kHz Epson Toyocom MC 146 32 768kHz 1 XT1 20ppm 7 0pF Components fitted manually into SK3 51 Resistor Metal Film Axial 1 0 125W 51R_ Any manufacturer 2 RA RD 52 Resistor Metal Film Axial 1 0 125W 82R_ Any manufacturer 2 RB RC 53 Feet stick on black 11 1mm dia 3M SJ5003BLACK 4 53 Components not fitted Capacitor Ceramic 0603 2 C5 C6 Resistor SMD 0603 1 R14 Humidity Temp Sensor Sensirion SHT11 1 S1 Crystal HC49 4H 1 XT2 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 24 14 Appendix SMD Adapter PCB Schematic and Legend Channel 1 Channel 2 8 x Pins Wearnes Cambion 460 3231 02 03 00 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 25 15 Appendix Serial Message Protocol Enquire Status Command Response Notes PCB WHO EK1 aa bb cece dddd aa bb Software version GGG Spftware checksum dddd Serial number Sensors EK1 GS1 ENQ EK1 GS1 aaa bbb ccc ddd aaa Heater setting HLO HHI HOO Hxx eee fffff
10. 24 hour cycle SW1 1 and SW1 2 on the PCB can be used to override low power mode forcing heaters 1 and 2 respectively to be either high power or off This can be useful if the Evaluation Kit is set up for automatic but you want to experiment with different types of sensor High power is set at 76 mW and low power at 43 mW using plug in resistors Other powers can be set by changing these resistors for different values as shown below Note that when a dual surface mounted device is used there will be also be a heating effect due to the power in the adjacent device The high power setting is defined by Heater 1 Rb Heater 2 Rc The low power setting is defined by Heater1 Ra Rb Heater 2 Rc Rd Total Approximate Resistance Power 150R 36 mW 133R 43 mW 120R 49 mW 100R 60 5 mW 82R 76 mW 68R 91 mW Note For the MICS 5914 ammonia single SMD sensor change Rb to 93 1R E96 series resistor not supplied to operate at 66mW in high power mode Caution Do not drive the heaters beyond the maximum power rating given in the individual device datasheets e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 13 6 2 Software Control of Heaters Set heaters to low power 43 mW with supplied resistors e HyperTerminal e e2v Datalogger Heater 1 Command EK1 GS1 HLO Heater 2 Command EK1 GS2 HLO EK1 response ACK Advanced tab Hea
11. 797 Z r 7 655 The Alarms tab allows setting of alarm thresholds described in section 9 The I O tab gives allows monitoring of digital inputs see section 10 and setting of analog outputs see section 11 The Advanced tab allows setting of the heater drives see section 6 and also manual control of the output load resistance for measurement see section 7 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 e2v for reprogramming This feature should only be used with direct instructions from e2v e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 8 4 Using HyperTerminal The e2v Data Logging software provides full control and monitoring of all the operation modes of the Evaluation Kit However users may wish to communicate 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 procedure Note the USB Drivers must be installed e Run HyperTerminal from the Windows Start button e Enter a name and choose an icon Rips le New Connection Enter a name
12. BY OE E EE SJ T 11363 2006 br AE D Ze H Bd Ek 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 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 28 17 Appendix Updating the MICS EK1 Embedded Software From time to time e2v may release updates to the PC datalogging software or the embedded software firmware which runs on the MICS EK1 microprocessor These will normally be available for download from the e2v website www e2v com To install a new version of embedded software on the MICS EK1 follow these instructions very carefully 1 moo boah 10 Download the firmware zip file Unzip and save the text file mics_ek1_ txt to the computer hard drive Connect up the MICS EK1 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 Firmware Click Start Update Select the firmware file mics_ek1_ 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 n
13. C2V e2v Metal Oxide Semiconductor MOS Gas Sensor Evaluation Kit MICS EK1 User Guide Whilst e2v technologies has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also reserves the right to change the specification of goods without notice e2v technologies accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of third party patents arising from the use of tubes or other devices in accordance with information contained herein e2v technologies uk limited Waterhouse Lane Chelmsford Essex CM1 2QU United Kingdom Holding Company e2v technologies plc Telephone 44 0 1245 493493 Facsimile 44 0 1245 492492 Contact e2v by e mail enquiries e2v com or visit www e2v com for global sales and operations centres e2v technologies uk limited 2010 DAS766841AA Version 2 February 2010 Template DF764388A 3 108014 IMPORTANT INFORMATION Before using this product please read and understand all the instructions and warnings e2v technologies does not accept responsibility for damage or injury resulting from failure to follow the instructions provided WARNINGS The Evaluation Kit is despatched from e2v technologies 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
14. a Digital Input 1 status 0 1 b Digital Input 2 status 0 1 c Digital Input 3 status 0 1 d Digital Input 4 status 0 1 Set Heaters Command Response Notes High Power EK1 GS1 HLO ACK EK1 GS2 HLO ACK Low Power EK1 GS1 HHI ACK EK1 GS2 HHI ACK Off EK1 GS1 H00 ACK EK1 GS2 H00 ACK Automatic EK1 GS1 Haal ACK aa Start continuous 24 hour cycle of high power for aa 24 hour cycle EK1 GS2 Haal ACK seconds followed by low power 00 lt aa lt FF Set Resistance Command Response Notes Low Range EK1 GS1 RLO ACK 1k4 Load EK1 GS2 RLO ACK High Range EK1 GS1 RHI ACK 358k4 Load EK1 GS2 RHI ACK Automatic load EK1 GS1 RAU ACK switching EK1 GS2 RAU ACK Set DAC Command Response Notes Fixed value EK1 DAT aaa ACK aaa 000 FFF EK1 DA2 aaa ACK Automatic mode EK1 DA Maa ACK aa 00 Track voltage reading of corresponding DAC EK1 DA2 Maa ACK 01 etc Future options Implemented on Version 1 0 1 of the PC Software and Version 01 02 of the firmware PCB software e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 26 Set Alarms Command Response Notes Manual On EK1 AL1 MAN ONX ACK individual 1 4 EK1 AL2 MAN ONX ACK all together 0 EK1 AL3 MAN ONX ACK EK1 AL4 MAN ONX ACK
15. aintained for 10 seconds the alarm will stay enabled for 15 seconds Read individual alarm conditions Enquire Status response when in Rate of Change condition e HyperTerminal Alarm 1 Command EK1 AL1 ENQ EK1 response EK1 AL1 aaa bcc dd e aaa Alarm status ONX OFF bec Alarm setting 1UP 1DN 2UP 2DN dd Percentage 01 99 dec e Time 1 8 dec e e2v Datalogger The status of the alarms is continually displayed in the Alarms tab e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 20 10 Digital Inputs 10 1 Introduction 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 read in software 10 2 Software Reading of Digital Inputs Read digital inputs Enquire Status e HyperTerminal Din Command EK1 DIN ENQ EK1 response EK1 DIN abcd a Digital Input 1 status 0 1 b Digital Input 2 status 0 1 Digital Input 3 status 0 1 d Digital Input 4 status 0 1 e e2v Datalogger The status of the inputs is continually displayed on the I O tab e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 21 11 Analog Outputs 11 1 Introduction Two analog outputs are provided on the expans
16. cc d ACK all together 0 EK1 ALS aDN cc d ACK System Command Response Notes Enter bootloader EK1 BLO DER Invalid command Invalid command NAK Implemented on Version 1 0 1 of the PC Software and Version 01 02 of the firmware PCB software e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 27 16 Appendix China RoHS Declaration ASAA WRILR Hazardous Substances or Elements SFE Am en K E KE FRKE ZRA Component Name f Lead Mercury Cadmium Chromium v POY Poly MICS EK1 Evaluation Kit Pb Hg Cd Compounds brominated brominated Cr6 Biphenyls Diphenyl PBB Ethers PBDE Epi UBC Printed Circuit Assemblies DAS766275AA Evaluation Kit PCB Spe Be Bi External Cables E100918 USB Lead O AIREA Power Supply Unit DAS766693AA Power Supply Unit O SCFB Paper Manuals DF766764A Quick Start Guide SERA CD Manual DAS766762AA CD ROM Manual Software O SHEE 4 Component Name MICS SMD PCB5 SMD Adapter Kit Enel LBC A Printed Circuit Assemblies DAS766276AA SMD Adapter PCB x5 ROVE Plastic Enclosure PC3863 Anti static Box Oo i RAS AAT HEAT ELE EW AE ANE HE BER DLP Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement in SJ T11363 2006 oO X RATA BEA I BD EZ EE
17. e alarms is continually displayed in the Alarms tab e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 19 Quick read of all alarms Enquire Status e HyperTerminal Alarm 1 4 Command EK1 ALO ENQ EK1 response EK1 ALO aaa bbb ccc ddd aaa Alarm 1 output ONX OFF bbb Alarm 2 output ONX OFF cece Alarm 3 output ONX OFF ddd Alarm 4 output ONX OFF e e2v Datalogger The status of the alarms is continually displayed in the Alarms tab 9 3 Additional Alarm Function The following functions are added in version 1 0 1 of the PC Software and version 01 02 of the firmware PCB software available from e2v Set rate of change alarm examples of each command e HyperTerminal Alarm 1 Command EK1 AL1 abb cc d EK1 response ACK abb Sensor association and function 1UP Alarm when Sensor 1 resistance increases by cc in d seconds 1DN Alarm when Sensor 1 resistance decreases by cc in d seconds 2UP_ Alarm when Sensor 2 resistance increases by cc in d seconds 2DN Alarm when Sensor 2 resistance decreases by cc in d seconds cc Percentage 01 99 d Seconds 1 8 e e2v Datalogger Alarms Tab Use Monitor Gas buttons in New Settings Tick Rate of Change Note that the rate of change alarm is triggered for 5 seconds whenever the condition is detected If the rate of change is m
18. ect Install Data Logging Software and USB Drivers from the CD menu Follow the on screen instructions 3 Set up the Evaluation PCB a b Plug one or two e2v MOS Gas Sensors into SK1 and or SK2 on the Evaluation PCB Ensure the orientation tab on the sensor matches the tab on the socket Set SW1 on the PCB as follows e SW1 1 and SW1 2 The Evaluation Kits are initially set in automatic heater mode for driving low power sensors For high power sensors override this mode and force the heater power to continuous high power mode as follows SW1 1 ON for high power sensor in SK1 see over for diagram amp sensor list SW1 2 ON for high power sensor in SK2 see over for diagram amp sensor list e SW1 3 Off e SW1 4 Off Connect the supplied USB lead from SK5 to a USB socket on your PC 4 Connect the 9 V Power Supply Unit a b Connect the DC output of the Power Supply Unit to SK4 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 The PC may take a minute to recognise and initialise the new hardware drivers 5 Run the e2v Data Logging Software a b C Run the program from the start menu The software will automatically detect which Com Port is being used for the USB connection If this does not happen a Com Port can be manually selected by unticking
19. en pee i 15 e DEN 25 Sei p3 an Dutputi 1 H d 1 e sep AJ oe T geg Gg FS gett L z E i z Dverheail BOES 2 ef E ars 74 Pas ep Ba pi GER pen EE Ras LL BPE d web z top g ecah De fps mm Sce88 tHE jn EI Is a G A D Lms mo o ca Riz TY e a R r TEEST Ibn 2a p ams 2 An Qu tout Ge EE H L 470A GREEN ay aQverhee KF i60ASGC USB INTERFACE DAS766841AA Version 2 page 23 Document subject to disclaimer on page 1 ited 2010 imi e2v technologies uk 13 Appendix Evaluation Kit PCB Parts List Item Description Manufacturer Part No Qty Reference 1 Blank PCB DPP766275AA Issue 2 Any manufacturer 1 HW1 2 Resistor 0603 0 063W 1 ORO Any manufacturer 1 R15 3 Resistor 0603 0 063W 1 100R Any manufacturer 4 R17 R18 R34 R35 4 Resistor 0603 0 063W 1 470R Any manufacturer 5 R9 R10 R11 R12 R13 5 Resistor 0603 0 063W 1 2k7 Any manufacturer 4 R5 R6 R7 R8 6 Resistor 0603 0 063W 1 10k Any manufacturer 7 R19 R20 R21 R36 R37 R38 R39 7 Resistor 0603 0 063W 1 47k Any manufacturer 1 R16 8 Resistor 0603 0 063W 1 100k Any manufacturer 5 R1 R2 R3 R4 R40 9 Resistor 0805 0 1W 0 1 10ppm 1k4 Tyco RN73C2A1K4BTG 2 R30 R31 10 Resistor 0805 0 1W 0 1 10ppm 357k Tyco RN73C2A357KB 2 R32 R33 11 Capacitor Cer 0603 NPO 50V 5 1nF Any manufacturer 2 C24 C25 12 Capacitor Ce
20. esaeeeeeeeeaueeenaneeenes 11 ST Power Supply SK4 TB E EE A AEE AEAEE A ARETE EAE AEE caeesid capeiaasRedeeaetieg 11 5 2 Gas Sensors Sockets SK1 GR 11 9 3 Control Switch GV eu KOENEN ENEE aeei ii VERSEN ENNEN sha sued tinct ewe 11 5 4 STAG Port PLN egod eave Mend a eed nat eeh EE 11 Ai Expansion Port PL 2 0 uNeebkuedeNk kr i aei iia oi aeiia iari a in a ENEE tinge eat 12 5 67 EEDS D1 D2 D3 D4A DK e a ee tte EE EE 12 EIER RESet SWIC SW HE 12 G6 Heater GoOntrol ME EE EE E E AA E E EEE 13 e Ra Wo tr tee Le de EE 13 6 2 Software Control of Heaters ccccccceceeeceeceeceeeeeeeeeecceaeeeeeeeeesecaaaeceeeeeeececcaeaeeeeeeeeeeseccneaeeeseeseseccieaeeeeeeeeees 14 6 3 Multiple Power Levels iiitcs ccceiecteh ea eea aaa ona aaa aaeain aaia ae iaae gd nena oie AEA a ie annia Aea 15 7 Sensor Resistance Measurement 16 CA tree Le de EE 16 7 2 Software Control of Gensors sees eeaeeeceeeeeseeaeaeceeeeeeeesgeeaeaeaeeeeeeeseeeaeaeceseeseeennieeeeeeeeeees 17 8 Temperature and Humidity Measurement ccececccceeeeeeeeeeeeeceneeeeceeeeeeeeseeeeeetseeeeeneesseensneneese 18 8 1 Temperature Measurement sosssserensseetttttttetttttttn ttnan ttet tt tn EEES AEOEEEEAAEESAEOEEEEAERESAEEEEEEEEEEESEEOEEEEER EOS EE EEEE Ennen 18 92 Humidity E EE 18 9 Alarm Outputs and LE RE 19 GW Tue Le de 19 9 2 Software Control of Alarm outputs cece cece ee caaeaeeeeeeeeeeacaaeaeeeeeeeseseccaeaeeeeeeesetessueaeeeeeeneees 19 9 3
21. fff ggg hhh bbb Heater present condition HLO HHI HOO EK1 GS2 ENQ EK1 GS2 aaa bbb ccc ddd ccc Range setting RLO RHI RAU eee ffffffff ggg hhh ddd Range present condition RLO RHI eee Raw ADC reading 000 to FFF hex ffffffff Resistance reading ohms four sig digits 00000000 99999999 dec ggg Temperature reading C 99 to 99 or ERR hhh RH reading 000 to 100 dec or ERR or XXX not fitted Analog Out EK1 DA1 ENQ EK1 DAT aaa bbb aaa DAC setting 000 FFF MOO M01 etc DAC EK1 DA2 ENQ EK1 DA2 aaa bbb bbb DAC output 000 FFF Alarms EK1 AL1 ENQ EK1 AL1 aaa bbb cccccccc aaa Alarm status ONX OFF individual EK1 AL2 ENQ EK1 AL2 aaa bbb cccccccc bbb Alarm setting MAN FOL 1GT 1LT 2GT 2LT EK1 AL3 ENQ EK1 AL3 aaa bbb cccccccc ecccccce Alarm threshold 00000000 99999999 dec EK1 AL4 ENQ EK1 ALA aaa bbb cccccccc Response when EK1 AL1 ENQ EK1 AL1 aaa bcc dd e aaa Alarm status ONX OFF in Rate Alarm EK1 AL2 ENQ EK1 AL2 aaa bcc dd e b Sensor 1 or 2 mode EK1 AL3 ENQ EK1 AL3 aaa bcc dd e cc UP increasing resistance DN decreasing resistance EK1 ALA ENQ EK1 ALA aaa bcc dd e dd Percentage change to activate alarm 01 99 decimal e Time seconds in which this occurs 1 8 decimal Alarms all EK1 ALO ENQ EK1 ALO aaa bbb ccc ddd aaa Alarm 1 output ONX OFF bbb Alarm 2 output ONX OFF ccc Alarm 3 output ONX OFF ddd Alarm 4 output ONX OFF Digital Inputs EK1 DIN ENQ EK1 DIN abcd
22. from the datasheet 1 mW for some sensors The Maximum Power Transfer Theorem states that the highest power will be present when Rsensor Rioap 1k4 Using a 2 048 V supply the maximum sensitive layer power is given by 2 Pmax wae 0 75 mW Voltage to Resistance Conversion For a particular Sensor and Load resistance From a measurement of the Output Voltage the output voltage can be calculated from the sensor resistance can be calculated from R x 2 048V Be TN AE ee GC 8 LOAD SENSOR OUT The high range has a load resistor of 1k4 357k 358 4k Note that this is 256 times 1 4k which allows a common software routine to be used for both ranges to convert from voltage to resistance For example an output voltage of 1 19466 V corresponds to a sensor resistance of e 1k0 on the low resistance range e 256k on the high resistance range Range Selection The optimum value for switching between ranges is when Rsensor 22 4k 16 x 1k4 Rroap can be programmed in software to be always low 1k4 always high 358 4k or to switch automatically Accuracy The Evaluation Kit has a 12 bit ADC for highly accurate resistance readings during experimentation The accuracy of the resistance measurement is related to the number of ADC bits and also the difference between Rgensor and Roan Accuracy is highest when Rgensor is close to Roan The Evaluation Kit also contains an operational amplifier buffer to prevent the ADC input impedance load
23. hen connecting or disconnecting IV wrap lines that exceed terminal width Input Translation ASCII Setup Cancel Connected 00 02 27 fauto detect 9600 8 N 1 SCROLL CAPS INUM Capture Print echo e Type WHO and a response should be received from the Evaluation Kit r e2y HyperTerminal 10 x File Edit View Call Transfer Help Del 213 cle ei CWHOILEK1 00 24 1CD2 0002 Connected 00 09 55 Auto detect 9600 8 N 1 SCROLL CAPS NUM Capture Print echo Further HyperTerminal commands are described throughout this manual A complete list is given in the appendices e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 10 5 User Interfaces Controls and Indicators 5 1 Power Supply SK4 TB1 The Evaluation Kit requires a 9V 10 power supply Either connect the supplied 9 V DC mains adapter to SK4 or a 9 V 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 E ae on the PCB indicated by the Protective Earth symbol in case of power supply faults 5 2 Gas Sensors Sockets SK1 SK2 Gas sensors should be plugged into SK1 and SK2 Be careful to ensure that the orientation tab
24. i E EEN enact o FEI l mas Fiz ee Hester aa tH pinera Soe T PLI ou c22 2 sa Dan gei u EE o Fig aaa Hien AYDI TRO SS Zum Haster wn Parma g ern 12 cap Ce paz Ras HUMIDITY LJ vanl Ee SC ER merana obt AuTCIEN V 357k Wk Over hea Lt ae Pays ES gy TDI SR SENSOR DN ggf an BOG g s g rosuli lt 4 PE 2 L IMat tittedi 3 P32 Ee S e5 EGS ES Ea ESE THs ba Aangel REENEN Dr 8 a cis ees 7 S55 65 Ba Sa be BS a GE aan LT ik Pai TUR Aangez SES BECHER EE Ed ted TUK ze S 2 4 we AH deta Ei 7 pa fa D i F2 PS 24 2S 26 27 PB 29 CH zw PE ek a4 CHANNEL 2 5 i t ER ne reset a KA EI os RST Ir T ban EE Wig Se a Bay 2 Sw CR ec Ki 8 EEEEEEER kere k im lap LP2S85AIN5 5 8 NOPE DI re ee 7466 d F23 k4 aur aL TRE fr Bu Anen 2 Li FDN3S7N P22 Ei ene E 2 oa Range SE j a ee O EXPANSION PORT Aude GE Baa Ra Ce Se CH d Ke in 357k e w l g GE Ak A DN e e m Heen l Ri REGIN Pr GE KE 4 WI P24 be ele Ramp ounen E a Ti Mea ee VI g A A a 2 Be KAR iaar iaoe Bra GND SUSREND OF cacen d ave ay B P Inpu Plug in 4 BUS NE psa 2 at 5 P D g 3 Alesis tars aya AB l NE Ste CD ve ngut ien aoe we LF TT aia ag Stesss D Ala SIR 1 NA Hp 3 ae PT pute 4 Ab 82A Woe bj le NE BS 4 SE PE USB socket required m 470R GAEEN Ac Bn EIER P66 i SE i ag KP B ASEC a haute Ad SIR 1 FEY H Ee IDe e ore Ta a SHIA Molex 875031028 S ak Dutputa fa CEASE Sc Denk Ke TAA C TA 8 ae TxD pl awe FDNSS7N g s fonas
25. ing the sensor circuit at very high values of Rsensor gt 1M The nature of MOS Gas Sensors means that they are often used in cost sensitive applications where high measurement accuracy is not always required In such cases a 10 bit ADC may be sufficient and the operational amplifier buffer may not be necessary e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 16 7 2 Software Cont rol of Sensors Set load resistor range to low 1 4k load resistance HyperTerminal e2v Datalogger Sensor 1 Command EK1 GS1 RLO Sensor 2 Command EK1 GS2 RLO EK1 response ACK Advanced tab Resistance Sensor1 manual settings Low Range button Advanced tab Resistance Sensor2 manual settings Low Range button Set load resistor range to high 358 4k load resistance 357k 1 4k HyperTerminal e2v Datalogger Sensor 1 Command EK1 GS1 RHI Sensor 2 Command EK1 GS2 RHI EK1 response ACK Advanced tab Resistance Sensor1 manual settings High Range button Advanced tab Resistance Sensor2 manual settings High Range button Set load resistor range to automatic recommended setting HyperTerminal e2v Datalogger Sensor 1 Command EK1 GS1 Sensor 2 Command EK1 GS2 EK1 response ACK RAU RAU Advanced tab Resistance Sensor1 manual settings Auto Range button Advanced tab Re
26. ion port PL2 Each analogue output is buffered by an operational amplifier and can be set in the range OV 000 hex to 2 048V FFF hex 11 2 Software Control of Analog Outputs Set Analog Outputs e HyperTerminal DAC1 Command EK DAC2 Command EK EK1 response DAT aaa DA2 aaa ACK aaa OQO FFF Sensor association and function Set 12 bit DAC output to aaa hex MOO Special mode 00 Track voltage reading of corresponding DAC M01 etc Future options e e2v Datalogger The status of the outputs is continually displayed on the I O tab Read Analog Output Values e HyperTerminal DAC1 Command DAC2 Command EK1 response EK1 response DAT ENQ DA2 ENQ DAT aaa bbb 1 E 1 1 DA2 aaa bbb aaa DAC setting 000 FFF MOO M07 etc bbb DAC output 000 FFF e e2v Datalogger The status of the outputs is continually displayed on the I O tab e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 22 iagram Kit PCB Schematic D ion Evaluat 12 Appendix
27. istance Approx Power Off Off Ra Rb Rc Rd 127R 45mW On Off Rb Rc Rd 100R 60 5mW Off On Ra Rb Re 80 5R 77mW On On Rb Rc 68 75R 89mW To control Overheat1 and Overheat2 set the heaters to High Power for on or Low Power for off This can be done using the e2v Datalogger software or via a terminal emulation program such as HyperTerminal The method of multi heater drive described above can also be automated by writing a small PC application in a language such as Visual Basic or Labview to send the appropriate serial commands e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 15 7 Sensor Resistance Measurement 7 1 Introduction 2 048V Metal Oxide Semiconductor Gas Sensors contain a sensitive layer whose resistance changes with gas concentration when heated to an appropriate temperature Different types of sensor Rsensor have different ranges of resistance see individual data sheets for details However the Evaluation Kit has been designed to Vout operate with all MOS sensors A switched load resistance is 1kA used to provide two ranges giving a good accuracy over a very or Rioap wide range of resistances 358 4k OV Sensitive Layer Maximum Power The low range has a load resistor of 1k4 which keeps the sensitive layer power below the maximum permitted value
28. itch SW2 Press and release SW2 to reset the microcontroller This has the same function as removing and reconnecting the power supply PCB Layout e2v MOS Gas Sensor Evaluation Kit MICS EKI CAUTION mn em www Zv com STATIC d ADAPTER Juri IVE D DEVICES O RESET RISCO CR bes pas766275 Wa iss B CSC i Jk P42 P43 Ics G P21 elk d IP CH Wat P38 P31 P49 P41 gei SIE LLLLIIF Se e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 12 6 Heater Control 6 1 Introduction Ozone and CO VOC sensors are normally driven at about 76 mW NO sensors require only 43 mW but when first turned on they will stabilise faster if driven at the higher power for about 90 seconds It is also useful to overdrive them at the higher power once every 24 hours in order to burn off any build up of airborne pollutants The temperature rise of the heaters is proportional to the applied power When operated at higher temperatures for extended periods of time some positive drift of the heater resistance will be experienced In order to keep the heater power constant as the resistance varies a simple constant power circuit is used comprising of a 5 V bias with a balance resistor At lower powers the heater resistance drift is minimal The Evaluation Kit allows each heater to be controlled independently The heater drives can be set to high power low power off or automatic
29. nerates 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 e2v technologies declares that the Evaluation Kit complies with EC fey OH directive 2002 95 EC the RoHS Directive restricting the use of certain ET RoHS hazardous materials in electrical and electronic equipment See section 16 for China RoHS information The Evaluation Kit is classified as Electronic and Electrical Equipment according to X See directive 2002 96 EC the WEEE Directive and should be segregated from domestic waste for disposal Contact your local e2v sales office for disposal instructions e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 2 Contents 1 rise TEE A 2 QUICK Start Guide RENE EE 5 3 Using the e2v Data Logging Software EE 7 G Sie e geet le 9 5 User Interfaces Controls and Indicators cece ccecccceecceeeeeceeeeeeueeeuueeeuueeueueeeeue
30. on the sensor matches the marking on the circuit board A dual surface mount sensor can be testing using an adapter PCB from e2v The adapter PCB should be plugged into both SK1 and SK2 Be careful to ensure that the PCB is fitted in the correct orientation by observing the corner markings 5 3 Control Switch SW1 SW1 should normally be all off Other settings allow use of special modes swi Off On 1 Normal SK1 fully controlled by micro Force high power mode for SK1 2 Normal SK2 fully controlled by micro Force high power mode for SK2 3 Normal SK1 and SK2 independent Multi level single sensor mode 4 Normal Humidity sensor not fitted Humidity sensor fitted SW1 1 and SW1 2 may be set ON for CO VOC and Ozone Sensors to only run these sensors at higher power This can be useful if the heater drive is set to automatic see Heater Control SW1 3 may be set to ON for multi level single sensor mode Only one sensor should be fitted either SK1 or SK2 but not both and different heater drive resistors are required This mode uses the heater drives in parallel on a single sensor to give more levels of heater power for experimental purposes SW1 4 may be set to ON when the user has fitted a humidity sensor in position S1 In this case the temperature readings are also taken from the humidity sensor rather than the LM60 IC as this gives slightly improved accuracy 5 4 JTAG Port PL1 The JTAG Port can be used by enginee
31. otes 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 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 29
32. r 0603 X7R 50V 10 10nF Any manufacturer 2 C17 C18 13 Capacitor Cer 0603 X7R 50V 10 100nF Any manufacturer 11 C2 C4 C8 C12 C13 C14 C15 C16 C26 C27 C28 14 Capacitor Cer 0603 X7R 16V 10 1uF Any manufacturer 3 C9 C10 C11 15 Capacitor Cer 0805 X7R 16V 10 4 7uF_ Any manufacturer 4 C20 C21 C22 C23 16 Capacitor Alum Elec 10uF 50V 20 Panasonic EEE1HA100SP 4 C1 C3 C7 C19 17 Diode LED Green SMD Kingbright KP 1608SGC 5 D1 D2 D3 D4 D5 18 Diode Schottky 1A 30V SMB On Semi MBRS130LT3G 1 D6 19 Diode TVS 12V 600W Any manufacturer SMBJ12A 1 D7 20 Diode Pack TVS 6V 500W ST Micro USB6B1 1 D8 21 Transistor NPN SOT23 NXP BC846B 4 TR1 TR2 TR3 TR4 22 Transistor N Channel MOSFET SOT23 Fairchild FDN357 4 TR5 TR6 TR7 TR8 23 IC Micro 16 bit 64LQFP Texas MSP430F2616TPM 1 IC 24 IC Serial Eeprom SO8 Microchip 25LC80A I SN 1 IC2 25 IC USB to UART Bridge MLP 28 Silicon Labs CP2102 1 IC3 26 IC Regulator 3V3 DPAK ST LD1117DT33C 1 IC4 27 IC Reference 2 048V SOT23 Texas REF3120AIDBZT 1 IC5 28 IC Op amp Rail to rail UO SO8 Analog AD8607ARZ 2 IC6 IC7 29 IC Regulator 5V0 SOT23 5 National LP2985AIM5 5 0 2 IC8 ICO 30 IC Temp Sensor SOT23 National LM60BIM3 1 2 31 Connector SKT TO 5 Mill Max 917 43 104 41 005000 2 SK1 SK2 32 Connector SKT DIL8 Tyco 808 AG11D LF 1 SK3 33 Connector SKT DC Power 2 5mm Lumberg 1613 14 1 SK4 34 Connector SKT USB Mini Type B Molex 675031020 1 SK5 35 Connector PLG 14 Way Box Header Amp 1 1634688 4 1 PL1 36 Connector 2x1
33. rs wishing to develop their own software for 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 TCK 7 8 Unused OV 9 10 Unused TRST 11 12 Unused Unused 13 14 Unused e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 11 5 5 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 1 2 9V Unregulated Power OV 3 4 OV Input 1 3V3 logic 5 6 Output 1 Open collector Input 2 3V3 logic 7 8 Output 2 Open collector Input 3 3V3 logic 9 10 Output 3 Open collector Input 4 3V3 logic 11 12 Output 4 Open collector OVA 13 14 Analogue Output 1 0 to 2 048V OVA 15 16 Analogue Output 2 0 to 2 048V Serial RXD 3V3 17 18 Serial TXD 3V3 OV 19 20 Not used 5 6 LEDS D1 D2 D3 D4 D5 D1 D2 D3 and 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 7 Reset Sw
34. sistance Sensor2 manual settings Auto Range button Read the Sensor Resistance Enquire Status e HyperTerminal Sensor 1 Command EK1 GS1 ENQ Sensor 2 Command EK1 GS2 ENQ EK1 response GS1 EK1 GS1 aaa bbb ccc ddd eee fffffffFf ggg hhh EK1 response GS2 EK1 GS2 aaa bbb ccc ddd eee fffffffFf ggg hhh aaa Heater setting HLO HHI HOO Hxx bbb Heater present condition HLO HHI HOO cee Range setting RLO RHI RAU ddd Range present condition RLO RHI eee Raw ADC reading 000 to FFF hex ffffffff Resistance reading ohms four significant digits 00000000 99999999 dec ggg Temperature reading degrees celcius 99 to 99 ERR if error hhh Relative humidity reading percent 000 to 100 dec XXX if not fitted ERR if error e2v Datalogger e2v technologies uk limited 2010 Document subject to disclaimer on page 1 The full status of both sensors is continually displayed DAS766841AA Version 2 page 17 8 Temperature and Humidity Measurement 8 1 Temperature Measurement The Evaluation Kit PCB is fitted with an LM60 temperature sensor IC mounted close to the sensor sockets This gives a voltage output proportional to the ambient temperature and is measured with the Analog to Digital Converter ADC in the microcontroller Ensure that SW1 4 is set to OFF to use the LM60 temperature sensor e H
35. t Default Power Levels e High Power e Low Power e2v technologies uk 76 mW 43 mW limited 2010 Document subject to disclaimer on page 1 Not critical as sensor position is empty Change Rb to 93 1R E96 series resistor not supplied to operate at 66mMW DAS766841AA Version 2 page 6 3 Using the e2v Data Logging Software Follow the instruction in the Quick Start guide to get the software operating The screen should appear as follows Zeie Gas Sensor Evaluation Kit Version 0 9h File Data Hardware Help SPAVA Gas Sensor Evaluation Kit Data Logging Alarms I O Advanced Engineering Production Setup System Configurations Des Data Logging SE Device Connected g Sensor 2 8 Graph View Sensors 1 and 2 Resistance Sensor Type Connected Metal Oxide Semiconductor MICS Firmware Version Sensor Measurements Sensor 1 Resistance Resistance Sensor 2 Resistance Temperature 1 1 1 1 1 1 1 1 1 80 100 120 140 160 180 200 220 240 260 280 Reading Measurement Period Ge 3 Log Data J The USB interface to the Evaluation Kit appears as a virtual Com 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 can be manually selected by unticking Automatically search for connected device on the Hardware menu The Com Port can be manually selected using
36. ters Sensor1 manual settings Low Power button Advanced tab Heaters Sensor2 manual settings Low Power button Set heaters to high power 76 mW with supplied resistors Caution Do not use high power for long periods of time with NO sensors e HyperTerminal e e2v Datalogger Set heaters to off e HyperTerminal e e2v Datalogger Set heaters to automatic imi Heater 1 Command EK1 GS1 HHI Heater 2 Command EK1 GS2 HHI EK1 response ACK pr Advanced tab Heaters Sensor1 manual settings High Power button Advanced tab Heaters Sensor2 manual settings High Power button GS1 HOO zero zero GS2 HOO zero zero Heater 1 Command EK Heater 2 Command EK EK1 response ACK Advanced tab Heaters Sensor1 manual settings Heater Off button Advanced tab Heaters Sensor2 manual settings Heater Off button This mode is used for driving low power sensors It starts a continuous 24 hour cycle of high power for aa seconds followed by low power for the remainder of the 24 hours If the Evaluation Kit is turned off and on again the cycle will restart again at turn on Overdriving the low power sensors helps to burn off any build up of airborne pollutants and can also give a quicker initial response e HyperTerminal e e2v Datalogger e2v technologies uk limited 2010 GS1 Haa 00 lt aa lt FF GS2 Haa 00 lt aa lt FF Heater 1 Command EK
37. trial and error to identify the correct one This is also useful when multiple Evaluation Kits are being used on one PC The main screen gives a continuous display of sensor resistances temperature and optionally humidity when a humidity sensor is fitted The graph view can be changed to display all these parameters in real time The data can also be saved to a file 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 can 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 By default the data logging software autoscales the output readings i e the graph axes expand to show all of the readings on y and x axes However it is possible to change these values in order to zoom in on certain readings e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 7 In the Data Logging tab right click on the graph to be adjusted and untick autoscale for the avis you want to change Autoscale x Autoscale Y This stops the axis from automatically expanding The values in the axis can then be changed To do this double click on the value at one end of the axis and adjust using the keypad d 7 95 EE 7 85 7 8 7
38. ual surface mount sensor Set the heater powers to two preset levels or change these levels for your application using plug in resistors Measure the sensor resistance and ambient temperature Set four alarm levels 2 per channel which drive on board LEDs and open collector outputs Measure relative humidity by fitting a humidity sensor not supplied Drive two analogue outputs Connect additional circuits to an expansion port Log sensor outputs temperature and humidity using the supplied PC Data Logging Program Adapter PCBs are required to enable a single or dual surface mount sensor to be plugged into the pair of sensor sockets on the Evaluation Kit These are available in packs of 5 from e2v or a distributor part number MICS SMD PCB5 Contents of Evaluation Kit Evaluation PCB Mains Power Adapter USB Lead CD containing User Manual e2v Data Logging Software and USB Drivers e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 4 2 Quick Start Guide 1 Read the Manual The supplied CD should auto run on your PC when inserted into a CD drive Select User Guide from the CD menu Before using this product please read and understand all the instructions and warnings e2v technologies does not accept responsibility for damage or injury resulting from failure to follow the instructions provided 2 Install the e2v Data Logging Software amp USB Drivers on your PC Sel
39. yperTerminal Temperature can be read with the Enquire Status command described in the previous section EK1 GS1 ENQ or EK1 GS2 ENQ e e2v Datalogger The measured temperature is continually displayed 8 2 Humidity Measurement The PCB can also be fitted with a Sensirion SHT10 or SHT11 combined temperature and humidity sensor by the user in position S1 SHT11 devices are widely available through electronic catalogues Set SW1 4 to ON to use the SHT10 11 the temperature readings will also be taken from this device which has a slightly better accuracy compared with the LM60 e HyperTerminal Humidity can be read with the Enquire Status command described in the previous section EK1 GS1 ENQ or EK1 GS2 ENQ e e2v Datalogger The measured humidity is continually displayed If SW1 4 is set to OFF XXX is returned for the humidity value If SW1 4 is set to ON but the combined temperature and humidity sensor is not fitted or cannot be read ERR is returned for both temperature and humidity e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS766841AA Version 2 page 18 9 Alarm Outputs and LEDs 9 1 Introduction 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
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