e2v Electrochemical and Pellistor Gas Sensor
Contents
1. Ce L amp V 4 7 PELLISTOR BRIDGE SUPPLY 1 Sch Les 1 AE 4 re av iia LTMaBzz cz a pem D ivin Br dpe_eupply Ge TA CT we a g PE Cine eya panoa ni 3V3 DIGITAL Sriteo on SE A it EEPROM Ber SUPPLY Shi a BAR MBRSIZ0L TIG ran Hot DIE Nur MEMDAY A pe Pa cat BT BY Syne agi PEF N T ES E 1 ER El Ee oe Syne agi sur 25V pa pz BI psa jsa jse 57 Be Es E4 Ba Sch Fe i EH E ETE Z5LCBBBA 5N edu i6 yangg SS ze Ile Con ER i DE SMBLIZA cr crs Taan gan HE AE a uapgu wuesay F eo 2 T ity E E ee Braz eel a 1 ADES2SAMZ pag PNE KR mar 3 PS pes es arcaicas K Tama 3 ren a be D n Fe SE P23 Pal a EE EDD E EE 45 Baa mm D 5 Ps vutemu Ae Dei pat Ieren 4 w u Ps aserecege lie TEMPERATURE e an A Output E pe seareecvsean D SENSOR on mu Paare P GG a tl ss X a 2A og a ADPA GARZ pag 4 E A A 2E Leg Sa c2at a264 Casan 7 ie ses a e i reg 7 32 TBBLHz 8 Jan RER 470P kP I2. 4 Run the e2v Data Logging Software a D Cc 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 Automatically search for connected device on the Hardware menu The outputs of the Evaluation Kit will now be displayed on the PC monitor 5 Set up for Electrochemical Sensors opa Check if the electrochemical sensor requires a bias see table over page For unbiased sensors OV set LK1 to position 1 2 otherwise set to 1 3 For biased sensors set LK1 to position 1 3 and adjust VR2 until the correct bias level is displayed on the PC software Electrochemical tab Turn off the power before plugging the sensor into S2 Turn the power back on and allow time for the sensor to stabilise Zero the sensor output current in clean air by pressing Set Zero not required for O2 The sensor output current nA is now being correctly displayed e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 5 Quick Start Guide Continued 6 Set up for Pellistor Thermal Conductivity Sensors a Check the bridge supply voltage required from the device datasheet b Turn the bridge supply voltage on and adjust VR1 until the correct bridge supply voltage is displayed on the PC software Pellistor tab c Turn off the power
3. External Cables E100918 USB Lead IRENE Power Supply Unit DAS766693AA Power Supply Unit SUFRE Paper Manuals DF769485A Quick Start Guide ABRIR CD Manual DAS768879AA CD ROM Manual Software O ARABE ADA A OS E EE SJT 11363 2006 ba E E IN d BERL F O 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 X ERZA BEA EW ED ETA EE E OE AA AE SJ T 11363 200645 HEINZE FY BIR et BE SK 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 DAS768835AA Version 2 page 23 16 Appendix Updating the ECVQ EK3 Embedded Software From time to time e2v may release updates to the PC datalogging software or the embedded software firmware which runs on the ECVQ EK3 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 ECVQ EK3 follow these instructions very carefully 1 mom boah 10 Download the firmware zip file Unzip and save the text file ecvg_ek3_ txt to the computer hard drive Connect up the ECVQ EK3 evaluation kit to the PC via the USB lead and connect the power Run the PC software install
4. Set Electrochem Zero EK3 CAE UZER ACK Unset Electrochem Zero EK3 CAE SPAN ACK Set Electrochem Span Span Gas EK3 CAP SCG ACK aaaaaaaa Set Pellistor Span Concentration ppm 100 hex aaaaaaaa EK3 CAE SCG ACK aaaaaaaa Set Electrochem Span Concentration aaaaaaa ppm 100 hex LEL EK3 CAP LEL ACK aaaaaaaa Set LEL Concentration ppm 100 hex aaaaaaaa No LEL for Electrochem Sensors Notes Pellistor Bridge EK3 PEL ONX ACK Turn Pellistor Bridge Supply On EK3 PEL OFF ACK Turn Pellistor Bridge Supply Off Electrochemical EK3 ECM Raa ACK aa LO use 5nA range HI use 25nA range Range AU Automatically select range Set DAC Command Response Notes Fixed value EK3 DA1 aaa ACK aaa 000 FFF EK3 DA2 aaa ACK Automatic mode EK3 DA1 aaa ACK aaa Sensor to follow PEL or ECM bbbbbbbb bbbbbbbb Scale Maximum mV 100 PEL or nA ECM hex EK3 DA2 aaa ACK bbbbbbbb O e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 21 Set Alarms Command Response Notes Manual On EK3 AL1 MAN ONX ACK individual 1 4 EK3 AL2 MAN ONX ACK all together 0 EK3 AL3 MAN ONX ACK EK3 AL4 MAN ONX ACK EK3 ALO MAN ONX ACK Manual Off EK3 AL1 MAN OFF ACK individual 1 4 EK3 AL2 MAN OFF ACK all together 0 EK3 AL3 MAN OFF ACK EK3 AL4 MAN
5. Vsense Veer i Voltage Porat EC4 1 CLO2 OV 2 1 Negative EC4 50 CLO2 OV 2 1 Negative EC4 50 CL2 OV 21 Negative EC4 500 CO OV 2 1 Positive EC4 2000 CO OV 2 1 Positive EC4 100 ETO 300 mV 1 3 Positive EC4 200 ETO 300 mV 1 3 Positive EC4 1000 ETO 300 mV 1 3 Positive EC4 1000 H2 OV 2 1 Positive EC4 100 H2S OV 2 1 Positive EC4 1000 H2S OV 2 1 Positive EC4 250 NO 300 mV 1 3 Positive EC4 2000 NO 300 mV 1 3 Positive EC4 20 NO2 OV 2 1 Negative EC4 20 PH3 OV 2 1 Positive EC4 1000 PH3 OV 2 1 Positive EC4 20 SO2 OV 2 1 Positive EC4 2000 SO2 OV 2 1 Positive EC410 02 600 mV 1 3 Negative e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA 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 e e2 ECYQ EK3 Gas Sensor Evaluation Kit Version 1 0 0 File Data Hardware Help e2V Pellistor Electrochemical Gas Sensor Evaluation Kit Data Logging Pellistor Electrochemical Alarms I O System Configurations S Data Logging Device Connected Z Firmware 00 01 4 EA A Electrochemical Concentration Unit Ref 0001 Sensor Measurements Pellistor 47 5 oLEL 9 N 1 9 gt 1 Electrochemical 0 00 ppm I 1 1 H 1 1 J H I 1 1 D D 1 I DH 1 Temperature 10 1S 20 25 30 35 40 45 350 55 60 G5 lt 0 75 ow 85 90 Readin
6. 54 Terminal Block 2 Way Elkay 15001 2 3 TB1 TB2 TB3 55 Switch Push button SMD C amp K KSR221G LFS 1 swe 56 Crystal SMD 32 768kHz Epson Toyocom MC 146 32 768kHz 1 XT1 20ppm 7 0pF 57 Link 0 1 Jumper Any manufacturer 1 LK1 58 Resistor 0603 0 063W 1 1k0 Any manufacturer 4 R25 R50 R53 R84 59 Resistor 0603 0 063W 1 120R Any manufacturer 1 R27 Components not fitted Capacitor Ceramic 0603 3 C5 C6 C67 Resistor SMD 0603 1 R14 R33 Crystal HC49 4H 1 XT2 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 20 14 Appendix Serial Message Protocol Enquire Status Command Response Notes PCB WHO EK3 aa bb cccc dddd aa bb Software version cccc Software checksum dddd Serial number Pellistor EK3 PEL ENQ EK3 PEL aaaa aaaa Bridge Supply mV hex Sensor tbbbbbbbb cccc tdddd bbbb Measured Concentration ppm 100 hex teeee ffffffff gggggggg tcccc Bridge Reading mV 100 hex thh h iii idddd Sensitivity Reading span voltage mV 100 hex teeee Measured Sensitivity mV LEL 100 hex tfffffff Pellistor LEL Conc ppm 100 hex gggggggg Pellistor Span Conc ppm 100 hex thh h Temperature C decimal to 1dp iii Bridge Supply ONX OFF Electrochem EK3 ECM ENQ EK3 ECM taaaa aaaa Bias Voltage mV hex Sensor tbbbbbbbb cccccccc tbbbbbbbb Measured
7. Ek in a screened enclosure e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 15 7 Pellistors and Thermal Conductivity Sensors The user is advised to consult the Pellistor Application Notes on the e2v website for information on how Pellistors and Thermal Conductivity Devices operate 7 1 Bridge Circuit Pellistors and Thermal Conductivity Devices are normally operated in a Wheatstone bridge arrangement as shown below The compensator and detector beads are balanced using R1 and R2 with some zero adjustment using R3 Many pellistors are supplied with a separate trimming resistor which is connected across the compensator bead R3 Zero Set In the evaluation kit the bridge voltage is set using VR1 covering a range of at least 1 6 V to 4 6 V The value of the bridge supply is monitored by the Analog to Digital Converter ADC and displayed by the PC Software The bridge voltage should be set up before connecting the pellistor device Once a correct voltage has been set the power should be turned off then the device plugged in as follows e Pairs of beads connect into TB2 compensator and TB3 detector If a trimming resistor is supplied connect in parallel with the compensator in TB2 e VQ500 series devices should be plugged into S2 e VQ600 devices should be wired into TB2 and TB3 o Red lead compensator TB2 Pin 1 top o Yellow lead common TB2 Pin 2 middle o Blue lead
8. LEL or Volume Force ON This forces the selected alarm line ON Force OFF This forces the selected alarm line OFF Follow Input This forces the selected alarm to track the associated digital input 10 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 on the PC Software 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 0 V 000 hex to 2 048 V FFF hex The analog outputs can be configured on the I O tab as follows Write Value Fixes the DAC output at a fixed voltage level set on the PC Software Follow Pellistor tracks the value of the Pellistor channel output in mV adjustable scale Note that a bridge voltage of OmV corresponds to 1 024V on the output Follow EC tracks the magnitude of the Electrochem channel output in nA adjustable scale O e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 18 iagram Kit PCB Schematic D ion Evaluat 12 Appendix
9. OFF ACK EK3 ALO MAN OFF ACK Follow digital EK3 AL1 FOL ACK inputs EK3 AL2 FOL ACK individual 1 4 EK3 AL3 FOL ACK all together 0 EK3 ALA FOL ACK EK3 ALO FOL ACK On if Sensor a EK3 AL1 aGT bbbbbbbb ACK a P Pellistor or E Electrochem value is ccc tbbbbbbbb Threshold Value Greater Than EK3 AL2 aGT tbbbbbbbb ACK ccc Threshold Units LEL VOL RAW threshold ccc individual 1 4 EK3 AL3 aGT bbbbbbbb ACK all together 0 ccc EK3 ALA aGT bbbbbbbb ACK ccc EK3 ALO aGT bbbbbbbb ACK ccc On if Sensor a EK3 AL1 aLT tbbbbbbbb ACK a P Pellistor or E Electrochem value is ccc tbbbbbbbb Threshold Value Less Than EK3 AL2 aLT bbbbbbbb ACK ccc Threshold Units LEL VOL RAW threshold ccc individual 1 4 EK3 AL3 aLT tbbbbbbbb ACK all together 0 ccc EK3 ALA aLT tbbbbbbbb ACK ccc EK3 ALO aLT tbbbbbbbb ACK ccc System Command Response Notes Serial Number EK3 SER aaaal ACK aaaa Serial Number decimal Invalid Invalid command NAK command e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 22 15 Appendix China RoHS Declaration MEA A SO SE Component Name Chromium VI Poly Poly ECVQ EK3 Evaluation Kit Compounds brominated brominated Biphenyls Diphenyl PBB Ethers PBDE Ena E BACA Printed Circuit Assemblies DAS768583AA Evaluation Kit PCB LS Bi
10. and Indicators 20 0 ccc eececcecceeeeeseseeceeeeeeeeesaeueaceeeeeeeeeeeeeeeeeeeeeeeeesaeeseeeess 11 5 1 Power Supply SK4 TBI l rana nnccns 11 5 2 USB Interface SK5 iia LIE la dad aid 11 5 3 Electrochemical Sensor Connector 32 11 5 4 Pellistor Thermal Conductivity Sensor Connectors S1 TB2 TB I 11 5 5 User Adjustments VR1 VR2 LK1 oo cece aea a nn rra nn 11 56 FEEDS Uu D D D4 Dette a evade en gege EN eral 11 5 7 Reset Switch SW inci Ae bid 11 5 8 2dTAG Port PE luna a a AA A eed a A haa hes 12 59 Expansion Pot PL iia Ed 12 67 El6cirochemical SSMS OMS xiii os 13 DE ne DEE 13 6 2 QUIputAMplitiOrS ege O a eh eee EA ENEE 13 A A ET 14 6 4 Setting Span Sensitivity ii a ies lesan deele 14 6 5 Minimising Noise on the Electrochemical Sensor Output 15 7 Pellistors and Thermal Conductivity Sensors ENEE 16 Tel BRA IC o ci e e lee or bo re cere ree 16 Eine Ee KEE 16 E Nie REEL EE Dana 17 8 Temperature Measures 17 H Alarm Outputs and LEDS kerer a cede lo oa 18 GN NA Pett seca cc sa Te TE og cds eee cee atte Peet cent ee came tea E oaateebe en 18 10 lie e Let 18 11 O 18 12 Appendix Evaluation Kit PCB Schematic Diagram AE 19 13 Appendix Evaluation Kit PCB Parts List EE 20 14 Appendix Serial Message Protocol AEN 21 15 Appendix China RoHS Declaration 23 16 Appendix Updating the ECVQ EK3 Embedded Goftware 24 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Vers
11. pellistor TB3 Pin 3 bottom 7 2 Setting Zero The evaluation kit does not need resistors R1 and R2 to determine a reference point This is calculated as exactly half the bridge voltage R3 is also not required To remove any zero offsets apply clean air to the sensor and press Set Zero This will automatically calculate the zero point The zero adjustment can also be removed by pressing Unset Zero When the zero has been set the bridge output mV will be correctly displayed by the PC software O e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 16 7 3 Setting Span Sensitivity At this stage you will not have correct concentration readings The Evaluation Kit allows a simple calibration to be performed based on a linear response to gas o First select the gas type or manually enter the LEL Lower Explosive Limit value o Enter the concentration of the calibration gas to be used o Select Measure Sensitivity when the calibration gas has been applied On the Data menu the concentration units can be changed between LEL Volume and ppm Enter the concentration of the calibration gas to be used then select Measure Sensitivity when the calibration gas has been applied 8 Temperature Measurement The Evaluation Kit PCB is fitted with an LM60 temperature sensor IC mounted close to the middle of the PCB This gives a voltage output proportional to the ambient temper
12. 3 R17 R18 R28 7 Resistor 0603 0 063W 1 470R Any manufacturer 5 R9 R10 R11 R12 R13 8 Resistor 0603 0 063W 1 1k5 Any manufacturer 1 R23 9 Resistor 0603 0 063W 1 1k8 Any manufacturer 1 R24 10 Resistor 0603 0 063W 1 2k7 Any manufacturer 4 R5 R6 R7 R8 11 Resistor 0603 0 063W 1 8k2 Any manufacturer 1 R19 12 Resistor 0603 0 063W 1 10k Any manufacturer 4 R21 R44 R45 R46 13 Resistor 0603 0 063W 1 39k Any manufacturer 1 R26 14 Resistor 0603 0 063W 1 47k Any manufacturer 1 R16 15 Resistor 0603 0 063W 1 100k Any manufacturer 6 R1 R2 R3 R4 R22 R30 16 Resistor 0603 0 063W 1 1M Any manufacturer 1 R54 17 Resistor 0805 0 1W 1 ORO Any manufacturer 1 R31 18 Resistor 0803 0 1W 0 1 25ppm 3k Any manufacturer 2 R48 R51 19 Resistor 0803 0 1W 0 1 25ppm 12k Any manufacturer 3 R41 R42 R52 20 Resistor Variable 1k 0 5W Multiturn Bourns 3296W 1 102LF 1 VR2 21 Resistor Variable 500k 0 5W Multiturn Bourns 3296W 1 504LF 1 VR1 22 Capacitor Cer 0603 X7R 50V 10 Any manufacturer 2 C17 C18 10nF 23 Capacitor Cer 0603 X7R 50V 10 Any manufacturer 15 C2 C4 C8 C12 C13 C15 C20 C24 100nF C25 C26 C27 C28 C30 C32 C65 24 Capacitor Cer 0603 X7R 16V 10 1uF Any manufacturer 10 C9 C10 C11 C16 C35 C36 C37 C38 C63 C66 25 Capacitor Cer 0805 X5R 25V 10 4u7 Any manufacturer 2 C31 C34 26 Capacitor Cer 1206 X7R 6 3V 10 Any manufacturer 3 C1 C3 C29 10uF 27 Capacitor Tant TPSC 25V 10 10uF AVX TPSC106K025R0500 1 C23 28 Capacitor Tan
13. ADC step Using the PC software the Evaluation Kit can be set to either of the two ranges or to automatically switch between them according to the signal level Note that the output current is described as positive for most gases electrons flowing out of the sensing electrode although conventional current is actually negative However for gases which undergo a reduction in the cell CLO2 CL2 NO2 O2 the output current is described as negative electrons flowing into the sensing electrode positive conventional current as shown below This will correspond to positive and negative voltage readings accordingly Sensor Output Current Direction EC4 1 CLO2 Negative EC4 50 CLO2 Negative EC4 50 CL2 Negative EC4 500 CO Positive EC4 2000 CO Positive EC4 100 ETO Positive EC4 200 ETO Positive EC4 1000 ETO Positive EC4 1000 H2 Positive EC4 100 H2S Positive EC4 1000 H2S Positive EC4 250 NO Positive EC4 2000 NO Positive EC4 20 NO2 Negative EC4 20 PH3 Positive EC4 1000 PH3 Positive EC4 20 SO2 Positive EC4 2000 SO2 Positive EC410 02 Negative 6 3 Setting Zero To remove any zero offsets apply clean air to the sensor and press Set Zero For oxygen sensors this is not necessary in fact it as advisable to press unset zero to remove any previously stored zero settings If a supply of nitrogen is available this can be used to set an accurate zero The senso
14. B085GC mn your F E EN GEL Ne apposita TEE am GREEN Ey gt poiar iiy ta Vago E Sp Ce l t J Sansor bias Le DEET SE DEER Ka Ps ADSS SAA ADAGZJARZ ea gt Pal we er r MICROCONTROLLER sec D SVB SUPPLY REF e wat 1 il nntereteen Se ava ES ca el 2 ma peste JTAG PORT Sua ES ay ics SET mae zl n men ELA 33 4 1 Perm D Ge T PLi ai EE PA E PN re ay A 3 E aa SOCKET FOR Ei BEAN DAL Ret iawn D 33 mo E raat vOSBB PELLISTOR Wi est ae BE eg B E io SC ridge_on Pra ee er ee ee ae S ak SENSOR aD7gggacez I 2 z 2 2338951 El H 56 Br idge supp lv eee Cele ere EE Brio E E i Er idas supply 3 ERE EE 7e EE en fe ha la fro las Ez 23 Es Es Es for foo h 2a aa br ke TERMINAL BLOCKS Bias men von Ph TKDE 24 FOR PELLISTOA EC Jo renge oui E o Ki nan Z er e AST PAIR OR yvOGG HEAD 15 ava A M EA Wy EC_hiranga_oud mb ek E at Io ae e RESET saz aA Pas G cm al e ee EECHER es Raqpessator pop H See a Bi ESRZZIE LFS T Felustor_output see CLE ADC E ke EI E a To ADE KM e lector 1 yu n s Kee EXPANSION PORT 103 eeg Tam psa PR e ov cz0 Bk AS Bes mn Schi ma S A L TR nh Lei 154659155736 PEGN RST Get cd LES Mal SOCKET FOR EC_bice pasad es von guspenp LG m GN w Pre ne ELECTAOCHEMICAL A ot ava a ow ae Let e joan War ele a SENSOR savs ALS Un aset Ze Be 470R acen dy owe Sue svn ANALOG TO DIGITAL CONWERTER reus ne Le psa HEET L eut Ss Working 2 Se Dei Paz PS4 ADEGZ0ARZ ne Fe ns mp peso J ea
15. C2V e2v Electrochemical and Pellistor Gas Sensor Evaluation Kit ECVQ EK3 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 DAS768835AA Version 2 August 2010 Template DF764388A 3 109016 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 squar
16. Concentration ppm 100 hex dddddddd teeeeeeee tececccce Sensor Output Current nA hex ff f ggg hhh dddddddd Electrochem Span Concentration ppm 100 hex teeeeeeee Span Current nA hex iff f Temperature C decimal to 1dp ggg Current Range RLO 5nA RHI 25nA hhh Selected Range RLO RHI RAU Analog Out EK3 DA1 ENQ EK3 DA1 aaa bbb aaa DAC Setting MAN ECM PEL DAC tcccccccc bbb DAC output 000 FFF EK3 DA2 ENQ EK3 DA2 aaa bbb tcccccccc Range Maximum nA if ECM or mV 100 if tcccccccc PEL hex Alarms EK3 AL1 ENQ EK3 ALa bbb ccc a Alarm Number 1 4 individual EK3 AL2 ENQ idddddddd eee bbb Alarm status ONX OFF EK3 AL3 ENQ ccc Alarm setting MAN FOL PGT PLT EGT ELT EK3 AL4 ENQ tdddddddd_ Alarm threshold Depends on units below hex eee Threshold Units LEL VOL RAW e LEL Threshold in LEL 1000000 e VOL Threshold in ppm 100 RAW Electrochem Threshold in nA RAW Pellistor Threshold in mV 100 Alarms all EK3 ALO ENQ EK3 ALO aaa bbb ccc aaa Alarm 1 output ONX OFF ddd bbb Alarm 2 output ONX OFF ccc Alarm 3 output ONX OFF ddd Alarm 4 output ONX OFF Digital Inputs EK3 DIN ENQ EK3 DIN abcd a Digital Input 1 status O 1 b Digital Input 2 status O 1 c Digital Input 3 status 0 1 d Digital Input 4 status 0 1 Calibration Pellistor EK3 CAP ZERO ACK Set Pellistor Zero EK3 CAP UZER ACK Unset Pellistor Zero EK3 CAP SPAN ACK Set Pellistor Span Electrochem EK3 CAE ZERO ACK
17. Q500 series Infrared mini sensors and electrochemical non reactive gas sensors JAS769638AA Premium Gas Flow Hood recommended for reactive gases e g H2S NOs Clo CIO ETO e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 4 2 Quick Start Guide Warning Do not connect or plug in any Gas Sensors until instructed 1 Read the Manual a The 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 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 a Select Install Data Logging Software and USB Drivers from the CD menu b Follow the on screen instructions 3 Connect the USB Interface and 9V Power Supply Unit a D N D Li Connect the supplied USB lead from SK5 to a USB socket on your PC 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 The PC may take a minute to recognise and initialise the new hardware drivers Biased iH 112 Unbiased 2 S1 Pellistor 101SI 9d
18. al sensor operates 6 1 Biasing Electrochemical sensors are normally operated in a potentiostat circuit which is designed to maintain a constant bias between the sensing electrode sometimes call the working electrode and the reference electrode The bias voltage is given is device datasheets as the applied potential and is also summarised in the quick start guide section 2 For unbiased sensors set LK1 to position 1 2 For biased sensors set LK1 to position 1 3 VR2 should then be adjusted to set the bias voltage Note that the potentiostat circuit IC8 B is effectively floating at 2 5 V due to the sensing electrode connection The bias voltage on VR2 and LK1 must be considered reference to 2 5 V Also the way that electrochemical sensor bias is defined Vsense Vrer Means that the polarity is opposite to that at VR2 and LK1 For example For unbiased sensors LK1 voltage 2 5 V equal to 2 5 V reference For 300 mV biased sensors LK1 voltage 2 2 V equal to 2 5 V 300 mV For 600 mV biased sensors LK1 voltage 3 1 V equal to 2 5 V 600 mV The PC software program displays the actual sensor bias setting i e Vsense Veer The bias voltage should be set up before the sensor is plugged in Turn the power off when plugging in a sensor Note that TR5 will clamp the bias to 0 V when the power is turned off This is useful to keep unbiased sensors at O V so that they will stabilise very quickly when power is re a
19. ature and is measured with the Analog to Digital Converter ADC in the microcontroller The ambient temperature is displayed by the PC Software e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 17 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 external 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 Each of the four alarm outputs can be set to one of the options shown below Click Refresh Settings to read the current settings from the PCB Click Write All Alarm Settings to write new alarm settings to the PCB The status of the alarms is continually displayed in the Alarms tab of the PC Software Monitor Gas Each alarm can be set to monitor either the Electrochemical or the Pellistor channel o Electrochemical channel the alarm can be set to come on above or below a threshold of current nA or concentration ppm or Volume o Pellistor channel the alarm can be set to come on above or below a threshold of voltage mV or concentration ppm
20. before connecting a pellistor TC type device as follows i Pairs of beads connect into TB2 compensator and TB3 detector If a trimming resistor is supplied connect in parallel with the compensator in TB2 ii VQ500 series devices should be plugged into S2 iii VQ600 devices should be wired into TB2 and TB3 e Red lead compensator TB2 Pin 1 top e Yellow lead common TB2 Pin 2 middle e Blue lead pellistor TB3 Pin 3 bottom d Turn the power back on and allow time for the sensor to stabilise e Zero the bridge output in clean air by pressing Set Zero f The bridge output voltage mV is now being correctly displayed 7 Further Settings Span Calibration Measuring the sensitivity a At this stage you will not have correct concentration readings a calibration is required b For electrochemical devices i Enter the concentration of the calibration gas to be used ii Select Measure Sensitivity when the calibration gas has been applied c For pellistors thermal conductivity devices i Select the gas type or manually enter the LEL Lower Explosive Limit value ii Enter the concentration of the calibration gas to be used iii Select Measure Sensitivity when the calibration gas has been applied d Note that the calibration assumes a linear response to gas concentration Electrochemical Sensor Bias Settings 4 LK1 settin Circuit Output FANS Bias
21. e VQ500 series devices should be plugged into S2 e VQ600 devices should be wired into TB2 and TB3 o Red lead compensator TB2 Pin 1 top o Yellow lead common TB2 Pin 2 middle o Blue lead pellistor TB3 Pin 3 bottom 5 5 User Adjustments VR1 VR2 LK1 VR1 Pellistor bridge supply voltage adjust 1 6 V to 4 6 V minimum range VR2 Electrochemical bias voltage adjust 700 mV to 350 mV minimum range LK1 Electrochemical bias 1 2 Unbiased 0 V 1 3 Biased 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 Switch SW2 Press and release SW2 to reset the microcontroller This has the same function as removing and reconnecting the power supply e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 11 5 8 JTAG Port PL1 The JTAG Port can be used by engineers 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 5 9 Expansion Port PL2 PL2 is an expansion port allowing connection to additional peripheral
22. e symbol If the Evaluation kit is used with a power supply which E CL 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 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 genera
23. ed 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 ecvgq_ek3_ 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 O e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 24
24. g 25 n 4 C Log Data QP Clear Data Update Rate s 7 a Use Timer Electrochemical Concentration ppm o I o o 1 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 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 concentrations and temperature The graph view can be changed to display all these parameters and also the raw output voltage pellistors and current electrochemical sensors 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 Alternatively there is a timer function which can stop data recording after a set period By default the data logging software autoscales the output readings i e the graph axes expa
25. hout having to return the PCB to e2v for reprogramming see section 16 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA 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 2x Y New Connection Enter a name and choose an icon for the connection Name e2y Icon Cancel e Select the correct COM Port being used by the USB 21x Driver x e2v Enter details for the phone number that you want to dial Country region United Kingdom 44 Area code for 245 Phone number Connect using z Cancel e Select 9600 Bits per second Baud 8 data bits no Com Properties E parity 1 stop bit no flow control Port Settings Bits per second so y Data bits e y Parity None y Stop bits i tts Elow control Restore Defau
26. ion 2 page 3 1 Introduction Thank you for purchasing the e2v Electrochemical and Pellistor Gas Sensors Evaluation Kit e2v Electrochemical Gas Sensors are low power devices capable of detecting a range of toxic gases as well as oxygen e2v Pellistor and Thermal Conductivity Gas Sensors are higher power devices capable of detecting a range of flammable gases Both of these types of 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 Test an e2v electrochemical toxic oxygen sensor Test an e2v pellistor thermal conductivity gas sensors in one of the following forms o Individual bead pairs o VQ500 series heads o VQ600 series heads Control the electrochemical sensor bias voltage Control the pellistor bridge supply voltage Calibrate sensors based on a linear response and then monitor gas concentration levels Set four alarm levels which drive on board LEDs and open collector outputs Drive two analogue outputs Connect additional circuits to an expansion port Log sensor outputs concentrations and temperature readings using the supplied PC Data Logging Program Contents of Evaluation Kit Evaluation Kit PCB Mains Power Adapter USB Lead CD containing User Manual e2v Data Logging Software and USB Drivers Accessories Available JAS767906AA Standard Gas Flow Hood for V
27. lts Cancel Apply e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA 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 EE p File Edt View Call Transfer Help Olas 8 Enf Connect To Settings ASCII Set x Function anow and chi keys act es ETE 21 x Terminalkeys Windows keys ASCII Sending IT Send line ends with line feeds Gees sends z IZ Echo typed characters locally Cul Del Cul H Space Cul H e Line delay o milliseconds Emulation Character delay fo milliseconds Auto detect y Terminal Setup Telnet terminal ID ANSI p ASCII Receiving IT Append line feeds to incoming line ends Backscrll buffer ines 500 A lr Force incoming deta to 7 8 ASC IT Play sound when connecting or disconnecting IV Wrap lines that exceed terminal width Input Translation ASCII Setup Cancel Connected 00 02 27 Auto detect 9600 8 N 1 SCROLL CAPS MN Capture Print echo e Type WHO and a response should be received from the Evaluation Kit e2v HyperTerminal DL File Edit View Call Transfer Help Del ls viel WHOI EK3 00 01 DC1F 00011 Connected 00 00 11 arustw 9600 8 N 1 SCROLL caps MN Capture Print echo Y A full list of HyperTerminal command
28. nd 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 DAS768835AA Version 2 page 7 In the Data Logging tab right click on the graph to be adjusted and untick autoscale for the axis you want to change y Autoscale x y 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 REES 7 9 7 85 7 8 7 7 757 ZE 7 65 7 584 0 5 The Pellistor tab allows monitoring control and calibration of pellistor and thermal conductivity sensors see section 6 The Electrochemical tab allows monitoring control and calibration of electrochemical sensors see section 5 The Alarms tab allows control of the open collector alarm output thresholds see section 9 The I O tab gives allows monitoring of digital inputs see section 10 and setting of analog outputs see section 11 It also allows a serial number to be set useful if using multiple evaluation kits The Data menu has options to change the displayed units for concentration and temperature The Hardware menu contains an Update Firmware feature which allows software updates to be loaded into the microprocessor wit
29. pplied Biased sensors may require several hours to stabilise after switch on In a gas sensor instrument it is common to maintain power to the bias circuit via a battery even when the rest of the instrument is turned off to achieve a rapid stabilisation 6 2 Output Amplifiers The output of an electrochemical sensor is a current proportional to gas concentration The range of this current can be calculated from the sensitivity values given in individual device data sheets IC7B is configured as a current to voltage converter with a gain set by R48 R49 3 051k Therefore the output signal of IC7B EC_hi_range_out has the following voltage e EC_hi_range_out 3051 V A 3 051 uV nA The ADC converter IC 12 is a 16 bit device 65536 steps using a 5 V reference Therefore each ADC step corresponds to 76 29 uV In terms of sensor output current this is as follows e EC_hi_range_out 0 00007629 3051 25nA per ADC step This is the basic resolution of the Evaluation Kit when using the high range This range is primarily intended for operating oxygen sensors which have a very high output For most other sensors IC8A provides a gain of 5 so that its output has the following voltage e EC lo range_out 15255 V A 15 255 uV nA e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 13 This can be expressed in terms of ADC steps as follows e EC lo range out 0 00007629 15255 5 nA per
30. r output current nA is now being correctly displayed with the zero offset removed 6 4 Setting Span Sensitivity At this stage you will not have correct concentration readings The Evaluation Kit allows a simple calibration to be performed based on a linear response to gas Enter the concentration of the calibration gas to be used then select Measure Sensitivity when the calibration gas has been applied On the Data menu the concentration units can be changed between Volume and ppm e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 14 6 5 Minimising Noise on the Electrochemical Sensor Output Electrochemical cells have very low output signal levels and can be susceptible to noise pickup The ECVQ EK3 has very short track lengths for the sensitive signal to minimise this effect but the user can take further steps to improve the output e Turn the pellistor supply off when measuring electrochemical cells The pellistor supply uses a switched mode power supply which can cause a small but measurable level of interference to the electrochemical cell e Use averaging of the output The PC software will default to a 10 second rolling average This can be increased or reduced as required e Do not operate RF transmitters e g mobile phones close to the ECVQ EK3 Bursts of RF energy may cause disturbance of the signal This effect can also me minimised by operating the ECVQ
31. s 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 PCB Layout REMOVE SW2 e2v EC VO Sensor Evaluation Kit ECVQ EK3 COMP PIB R27 52 POWER BEFORE www eZv com USB es pen E i ras CONNECTING SENSOR po TB2 C24 Y PLI E ME Sat RESET a cs RISC IC bn Cs a PES Fapa aa o LE l l V Ss ENT es CH re HT Ics En De 9 102 VIL al f P41 AN G IT cB o Er S Ps8 e eg er C4 eg e SR ICI T N e R31 gl LE e Je e E P p30 JH aiL TR reared De HeD lt OUTPUTS PL2 m ETRE C c35 DAS768583 Ma iss B Dia Rig ei cris B w 37 P36 P35 CS e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 12 6 Electrochemical Sensors The user is advised to consult the Electrochemical Sensor Application Notes on the e2v website for information on how an electrochemic
32. s can be found in Section 14 e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 10 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 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 on the PCB indicated by the Protective Earth symbol in case of power supply faults 5 2 USB Interface SK5 SK5 is a type B Mini USB connector for communicating with a PC 5 3 Electrochemical Sensor Connector S2 Electrochemical sensors should be plugged into S2 Before plugging in the sensor ensure that the correct bias voltage has already been set up and that the power has then been turned off 5 4 Pellistor Thermal Conductivity Sensor Connectors S1 TB2 TB3 Pellistor sensors should be plugged in as shown belw Before plugging in the sensor ensure that the correct bridge supply voltage has already been set up and that the power has then been turned off e Pairs of beads connect into TB2 compensator and TB3 detector If a trimming resistor is supplied connect in parallel with the compensator in TB2
33. t TPSE 16V 10 100uF AVX TPSE107K15R0100 1 C33 29 Capacitor Alum Elec_50V 20 10uF Panasonic EEE1HA100SP 2 C7 C19 30 Diode LED Green SMD Kingbright KP 1608SGC 5 D1 D2 D3 D4 D5 31 Diode Schottky 1A 30V SMB On Semi MBRS130LT3G 1 D6 32 Diode TVS 12V 600W Any manufacturer SMBJ12A 1 D7 33 Diode Pack TVS 6V 500W ST Micro USB6B1 1 D8 34 Diode Zener 3V9 3W OnSemiconductor 1SMB5915BT3G 1 D10 35 Transistor NPN SOT23 NXP BC846B 4 TR1 TR2 TR3 TR4 36 Transistor JFET P Chan SOT23 Fairchild MMBFJ177 1 TR5 37 IC Micro 16 bit 64LQFP Texas MSP430F2616TPM 1 1C1 38 IC Serial Eeprom SO8 Microchip 25LC80A I SN 1 IC2 39 IC USB to UART Bridge MLP 28 Silicon Labs CP2102 1 IC3 40 IC Regulator 3V3 DPAK ST LD1117DT33C 1 1C4 41 IC Reference 2 048V SOT23 Texas REF3120AIDBZT 1 IC5 42 IC Op amp Rail to rail UO SO8 Analog AD8629ARZ 3 IC6 1C7 IC8 43 IC Regulator DC DC LGA50 Linear LTM8022EV PBF 1 IC10 44 IC Reference 5 0V SO8 Analog ADR445ARZ 1 IC11 45 IC ADC 8x16bit 20QFN Analog AD7689ACPZ 1 IC12 46 IC Temp Sensor SOT23 National LM60BIM3 1 3 47 Connector Press Mount Socket Wearnes 450 1804 01 03 00 6 S1 3 off S2 3 off Cambion 48 Connector SKT DC Power 2 5mm Lumberg 1613 14 1 SK4 49 Connector SKT USB Mini Type B Molex 675031020 1 SK5 50 Connector PLG 14 Way Box Header Amp 1 1634688 4 1 PL1 51 Connector PLG 2x10 Way 2 54mm Harwin M20 9981045 1 PL2 52 Connector PLG 1x3 Way 2 54mm Harwin M20 9990345 1 LK1 53 Fuse Polyswitch 500mA Hold Tyco MICROSMDO50F 1 F1
34. t i vip e Ja PS9 op In lw W a TT Pes DIER A a g ER A wc ne ph ia ES Inpuia n H Si S 4 am SE er cr t ne Al TOA con de BEE ji E H de n pers P72 Es NNF ne pep LA pss EIDEL m Inpu DS GE d E ne pa pe AA TEJ MMEF 177 naa mia pza M n cl sen pee e Ey oraso5 2 DEE n vi ANS ER DE Bu mp E El 5 E en 1516 T AA A wx LS mos D cacen de DEEN L Ange zap 5 psa P36 18 3 Da 5 ES Bva UA 3 ae E va Sly rts 2 Pad El e Gre wha PLL GEE aie wer tm agoe Li Beien 5 1520 17 6 EC_lo_renge_out z pn EE caz ADBGZBARZ oT Cp Han aw ca f az Ne D 5 PL2 8 EA Wan ian L e ba Laf A TAER ASI car OSBEBT i f EP202 mn Output NS a T FE dch Ke n di ADOBZIARZ wA USE INTERFACE e C DAS768835AA Version 2 page 19 Document subject to disclaimer on page 1 ted 2010 imi O e2v technologies uk 13 Appendix Evaluation Kit PCB Parts List Item Description Manufacturer Part No Qty Reference 1 Blank PCB DPP768583AA Any manufacturer 1 HW1 2 Feet stick on black 11 1mm dia 3M SJ5003BLACK 4 HW2 HW3 HW4 HW5 3 Resistor 0603 0 063W 1 ORO Any manufacturer 3 R15 R20 R43 4 Resistor 0603 0 063W 1 10R Any manufacturer 2 R32 R47 5 Resistor 0603 0 063W 1 51R Any manufacturer 1 R49 6 Resistor 0603 0 063W 1 100R Any manufacturer
35. tes 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 Fol directive 2002 95 EC the RoHS Directive restricting the use of certain e 2002 98 66 hazardous materials in electrical and electronic equipment See section 15 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 O e2v technologies uk limited 2010 Document subject to disclaimer on page 1 DAS768835AA Version 2 page 2 Contents 1 NO 4 NS OO EEEE E AAE none sovatgun thas neces cc saattessduaureat mehassaaia vised uases das maseaane A 5 3 Using the e2v Data Logging Software AEN 7 4 Using HyperTerminal EE 9 5 User Interfaces Controls
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