TVOC Instrument User Manual V4.0
Contents
1. TVOC Instrument User Manual V4 0 Register your instrument online to receive your Extended 2 Year Warranty See page 26 for details TVOC Instrument User Manual Part Number 849215 Unrivalled Detection www ionscience com TVOC MANUAL lon Science Ltd Unrivalled Detection Page 2 of 32 www ionscience com Declaration of Conformity Manufacturer lon Science Ltd The Way Fowlmere Cambridge SG8 7UJ UK Product TVOC Product Description An intrinsically safe fixed continuous monitor comprising of a photo ionisation detector for detecting and measuring volatile organic compounds with a 4 20mA output Directive 94 9 EC ATEX Identification 11 2G Ex ia IIC T4 20 C lt Ta lt 50 C Notified Body Baseefa Ltd 1180 Buxton UK Identification 11 3G Ex nL IIC T4 20 C lt Ta lt 50 C lon Science Ltd Self certified EC Type Examination Certificate s Baseefa0O5ATEX0277 latest supplement BaseefaO5ATEX0277 2 issued 24 November 2008 lonscienceO9ATEX002 Examination certificate issued 3 September 2009 Ref lon Science Cert Report 849237 849242 International Standards IECEx BAS 06 0057 latest revision no 1 issued 20 November 2008 Ref Baseefa Cert Report 05 c 0423 06 c 0614 08 c 0578 Standards BS EN 60079 0 2006 Electrical Apparatus for Potentially Explosive Atmospheres General Requirement BS EN 60079 11 2007 Explosive Atmospheres Equipment Protection by Intrinsic Safety i BS EN 60072. Ib 4 882 Packed 1 47kg 3 2Ib 2 859 7 Segment 4 Digit LCD 4 Colour LED s sensor T90 lt 5sec TVOC output update Variable 1 second to 10 minutes O to 100 ppm 1 ppm whichever is greater 100 to 1000 ppm 10 or 10 ppm whichever is greater O 1000 ppm gt 75 Magnetically accessed ZERO Carbon canister SPAN 100 ppm Isobutylene 10 Operation 20 C to 50 C 4 F to 122 F 0 95 RH non condensing EMC Screened cables are required to archive the light industrial immunity levels NB All specifications are against an isobutylene calibration at 20 C 90 RH and up to 100 ppm Unrivalled Detection www ionscience com Page 30 of 32 TVOC MANUAL Manual Lo lon Science Ltd Manual Version Amendment Date updated Instrument Firmware S TVOC V2 1 Diagram 5 2 1 updated on 31 3 08 V3 09 page 11 TVOC V2 2 Diagram updated on page 21 4 08 V3 09 15 TVOC 2 3 Declaration on conformity 27 11 08 V3 09 change onl TVOC 2 4 Log added to back of manual 09 01 09 V3 09 TVOC 25 Diagnostics added and P amp F barrier changed TVOC 2 6 TVOC firmware modified to allow customers to calibrate using an alternative concentration Aldo improved the description of the F2 fault condition P6 P17 P24 TVOC 2 7 TVOC ATEX certification to allow zone 2 installation without safety barriers P12 P13 P26 TVOC 2 9 Inclusion of Cable gland in kit so addition of details regar
3. TVOC MANUAL lon Science Ltd Packing List All items of equipment shipped by lon Science Ltd are packed in suitable containers and enclosed in a shock absorbing filling which affords a considerable degree of protection against physical damage Contents should be carefully removed and checked against the packing list Any discrepancies between the contents and the packing list must be reported to lon Science Ltd within 10 days of receipt of shipment lon Science cannot be held responsible for shortages not reported with in the period Standard TVOC instrument ltem__ Description Qty 1 TVOC instrument 1 2 Cable gland M20 Intrinsically Safe Certified 2 3 Blanking plug M20 intrinsically Intrinsically Safe Certified 1 4 TVOC Manual 1 TVOC Calibration Tool Kit Item Description Qty 1 Calibration magnet 1 2 Calibration adaptor 1 3 Calibration connector 1 4 Aspirator 1 5 Carbon filter 1 6 Allen keys 1 3 Calibration 2 Calibration Connector Adaptor 1 Calibration Magnet 6 Allen Keys X 2 5 Carbon Filter 4 Aspirator Diagram 1 Unrivalled Detection Page 8 of 32 www ionscience com TVOC MANUAL lon Science Ltd TVOC Setu Selector Pins i TVOC has a number of settings that can be selected by the Selector Pins Programming port user via a row of 4 selector pins mounted on the reverse side of the main PCB Diagram 2 shows the location of the functional ABCD selector pins labelled A B C amp D 3 4 20mA
4. Waterbury Metmann Neandertal SG8 7UJ VT 05676 40822 UK USA GERMANY Tel 44 0 1763 207206 Tel 1 802 244 5153 Tel 49 2104 14480 Fax 44 0 1763 208814 Fax 1 802 244 8942 Fax 49 2104 144825 Email info ionscience com Email info ionscienceusa com Email info ism d de Web www ionscience com Web www ionscience com Web www ism d de Unrivalled Detection Page 26 of 32 www ionscience com TVOC MANUAL lon Science Ltd Diagnostics Below are two conditions your TVOC can be in when it is working correctly Power supplied to the PID sensor far Two TVIOC Instrument Lamp ONOFF cas Light from Light controlled by TOC f No fault with instrument Pid lamp Sensor a Power to PID cell OW PID lamp OW Light sensor Indicates Light Sensor Housing Sensor Cap Diagram 25 THIOL Instn nt l lf No fault with instrument Power to PID cell OFF PID lamp OFF Light sensor Indicates NO Light Diagram 26 The two conditions shown below are of the instrument in an error state with potential checks cures for these faults TVOC Insirumeni j x F1 Error Power to PID cell ON m PID lamp OFF Pit Sensur Light sensor Indicates NO Light Cause Loose cable between sensor and main pcb Contaminated pellet Lamp failure Cell failure Diagram 27 lf an F1 error occurs when the instrument is first switched on there may not be an issue The instrument needs to be left on for a few cycl
5. as shown on the diagrams and under Installation Section of this manual There may however be technical circumstances where connection to the PCB is necessary Unrivalled Detection Page 11 of 32 www ionscience com TVOC MANUAL lon Science Ltd Installation Dimensions for mounting 0 22in 5 5mm 3 OFF FIXING POSITIONS FOR M5 4 96in 3 01in T 126mm 76mm 1 03in RE Lo S ae 26mm oO ai f Eg 0 79in 20 0Mm TE S ai Se TE SS amp LID M5 SCREW x 4 4mm ALLEN KEY CASE SENSOR Fowl LID OPENED BY PCB MOUNTED REMOVING M5 SCREWS TO REAR OF LID SENSOR amp EARTH CABLE REMAIN CONNECTED TO CASE LID MUST BE ROTATED SENSOR CABLE DOWN OR TO ONE CONNECTION SIDE AND HANGS IN POSITION SHOWN 1 65in 42MM PROGRAMMING PORT SELECTOR PINS Fl POWER POWER CONNECTION 4 20MA CONNECTION F2 4 20mA Diagram 5 www ionscience com Page 12 of 32 Unrivalled Detection TVOC MANUAL lon Science Ltd Installation NOTE The TVOC case can be used as a template when marking out fixing holes but do not drill through the fixing holes Power requirements Non Intrinsically Safe Operation applications Input power 5 28Vdc 80mA max 0 5mm to 2 5mm C S A Output power 4 20mA 8 35Vdc 22mA 0 5mm to 2 5mm C S A Note 4 20mA loop must be externally powered 4 Wire System Non IS Diagram 6 3 Wire System Non IS Diagram 7 Unr
6. cells then you will need to contact lon Science for some assistance if the problem remains after the instrument has completed a few minutes of run cycles and the cable has been checked Or alternatively if the problem remains after you have tried replacement parts TOC Ineinum ent x F2 Error Power to PID cell OFF PID lamp OFF but appears OWN Light sensor Indicates Light Diagram 28 Cause Ambient light on sensor l TYOC switched on with PID cell removed The F2 error occurs when the lamp appears to be illuminated yet power is removed from the PID cell TVOC checks the PID lamp status using a light sensor Running TVOC with the sensor or the sensor cap removed will result in an F2 error Light reflecting on to the PID sensor from shiny surfaces can also cause the F2 error to occur A sensor light guard is available to prevent false alarms during normal operations lon Science part numbers Required for this modification are 849245 light guard 5 OV 11 O ring amp 849206 Cap Diagram 29 TVOC Instrument a x F 3 Power to PID cell ON PID lamp OFF Cause Cable disconnected The F3 error occurs in current build standard instruments when the cable is disconnected Instruments with serial numbers earlier than 10 01790 will not indicate an F3 error if the cable is disconnected an F1 error will be displayed instead and the diagnostics associated with F1 errors above should be performed Diagram 30 If
7. create EE area 27 FEO O ac eho E er ge ott ee ne este ele eee 28 SPee MES ice ce ce ee tl ts tm acl wd crete ete seine eae dete dea ete 29 Technical SOCCHIC ATION wai cccccsececeeweesaieawcecersevncteccsnteseveastediiwswssseesaveucscnenddwessawintedasesssieawscbiapawecsutiastedcdaswewoels 30 Manual LOU i is ani aa Era rE 31 Unrivalled Detection Page 4 of 32 www ionscience com TVOC MANUAL lon Science Ltd Statements Responsibility for use TVOC detects a large range of gases which are potentially dangerous from both a poisoning and or an explosive perspective TVOC has a number of selectable features allowing the detector to be used in a variety of applications lon Science Ltd can accept no responsibility for the incorrect adjustment of features that cause harm or damage to persons or property It is the users responsibility to respond appropriately to the readings delivered Inadequate performance of the gas detection equipment described in this manual may not necessarily be self evident and consequently equipment must be regularly inspected and maintained lon Science recommends that personnel responsible for equipment use institute a regime of regular checks to ensure it performs within calibration limits and that a record be maintained which logs calibration check data The equipment should be used in accordance with this manual and in compliance with local safety standards Warning 1 Substitution of components may impair intrinsic
8. servicing and calibration is increased where longer OFF times are selected However the length of time between servicing also depend on ambient air quality the higher VOC concentration detected by the instrument then the shorter the time PID lamp duty cycle between servicing Diagram 9 Adjusting the lamp OFF time There are two stages to adjusting the lamp OFF time The first stage adjusts the seconds 0 59 and the second stage adjusts the minutes 0 5 To adjust the lamp OFF time the magnetic switch must be activated during the Start up time NOTE Please read this entire procedure before attempting to adjust the lamp OFF time 1 During the 1 minute Start up routine place the calibration magnet over the top E right hand corner of the lon Science logo Two numbers on the LCD screen will flash i f 2 This indicates the lamp OFF time in seconds 3 Placing the calibration magnet back over the logo will cause the number to role between 0O and 59 seconds Remove the magnet when the desired time is displayed 4 After 5 seconds the display will show another two numbers and flash 5 This indicates the lamp OFF time in minutes 6 Again place the calibration magnet over the logo to rotate the numbers between 0 j i and 5 minutes Remove the magnet when the desired time is displayed 7 After 5 seconds the entire output frequency is displayed 8 After a further 5 seconds the set frequency w
9. 32 www ionscience com TVOC MANUAL lon Science Ltd Introduction to TVOC TVOC is a fixed continuous monitor for the detection and measurement of total volatile organic compounds which can be dangerous from both a poisoning and explosive perspective Total VOC s are detected using PID Photo ionisation detection technology TVOC has a number of user selectable features which define its operation and will be application dependent The user can define the detection ranges or 0 01 10ppm 0 1 100 ppm or 1 1 000 ppm Default detection units either ppm or mg m and the duty cycle time i e the frequency that the instrument takes a measurement Duty cycles are explained in more detail under TVOC set up and Operation IMPORTANT TVOC can be calibrated on alternative gases to Isobutylene however to ensure TVOC remains within specification the correct concentration for the alternative gas must be chosen Example Benzene gas has a response factor of 0 5 which means only half as much concentration is required to produce the equivalent to Isobutylene The ideal gas concentrations used to set the calibration SPAN are shown below Lower limit Upper limit 10 ppm range 8 ppm 12 ppm Isobutylene equivalent 100 ppm range 90 ppm 110 ppm lsobutylene equivalent 1 000 ppm range 90 ppm 110 ppm lsobutylene equivalent How to calculate alternative concentration of gases for gases other than lsobutylene Ideal response Response factor Ideal calibr
10. 9 15 2007 Explosive Atmospheres Equipment Protection by other means n BS EN 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use General requirements Directive 2004 108EC Electrical Equipment Electromagnetic Compatibility EMC EN61000 6 3 2007 Class 1 light industrial and domestic Electromagnetic Compatibility EMC Generic standards Emission standard for residential commercial and light industrial environments EN50270 2006 Electromagnetic compatibility Electrical apparatus for the detection and measurement of combustible gases toxic gases or oxygen Other Standards BS EN ISO 9001 2008 Quality Management Systems Requirements BS EN 13980 2002 Potentially Explosive Atmospheres Application of Quality Systems On behalf of lon Science Ltd declare that on the date this product accompanied by this declaration is placed on the market the product conforms to all technical and regulatory requirements of the above listed directives Name Mark Stockdale Position Technical Director Signature Date 20 November 2009 TVOC MANUAL lon Science Ltd Contents Declaration of COMOUiny vvcsccccisiecocwecseseviecscctsweneateepccscesseerawtnmrsnevenectsseteaccestsnssncuesssrsvauenctawenteccedsnenswecseteavecesenes 3 EME Sec cc sae eerste E E EE E EE 5 Responsibility for USC uerencapeasancnsiassatienna cadens nipaten nina dinavedincanuiraithpaesnpnasannesiaatameneacaieadUsi
11. OC MANUAL lon Science Ltd Calibration 5 Slowly and repeatedly squeeze the hand aspirator to push clean air through the carbon filter and past the PID sensor The ZERO LED will stop flashing after approximately 2 minutes 6 Now remove the equipment except for the calibration adaptor NB during the Zeroing process the mV reading on the display must reduce to below 30 mV to pass the ZERO calibration stage An acceptable ZERO calibration level will result in the illumination of the GREEN LED An unacceptable ZERO calibration level will result in the illumination of the RED LED Should this occur the TVOC will not proceed to the gas tolerance setting and return to normal operation the previous calibration levels will be used The Yellow zero LED will be illuminated to indicate the failure to set a zero calibration level Setting the gas concentration The actual value that the calibration has been supplied at 1 Now again place the calibration magnet over the corner of the logo rm ri The GREEN or RED LED will be extinguished and the numeric display TEIE will start to flash ai 7 2 If the 0 10ppm range is selected you will be able to adjust between 1 0 ppm and 100ppm for both the 100 ppm and 1000 ppm ranges a concentration of between 1 and 200 ppm can be selected Leaving the magnet in position will cause the displayed number to cycle through the concentration remove the magnet when the displayed value matches that stated on the C
12. OLDER g g DY g amp 5 rd M5 voc Pe M5 on Tae y EPT DIFFUSIVE THREAD Diagram 20 DIFFUSIVE 7 6mm Typ Part number voc Part number CALIBRATION Part number 849298 PUMPED A 849249 BUMP GAS 849217 Remote area monitoring This is where TVOC is monitoring the atmosphere in a roof or other space that is hard to access but where the TVOC still needs regular bump tests In order to avoid the difficulty of accessing the TVOC such as scaffolding ladders enclosed area breathing apparatus etc and permits for accessing Here the TVOC can be fitted with a Fixed Cal adaptor This will enable calibration gas to be piped to and flood the sensor so that the instrument system can be tested or calibrated remotely See diagram 3 above Fixed Cal Adaptor Diagram 21 Diagram 22 Gas sample systems It is sometimes necessary to pump or draw a gas sample past the TVOC For this a Flow Adaptor can be fitted The flow adaptor has an inlet and an outlet port so that gas may be pushed or drawn across the sensor See diagram 2 above TVOC Flow Adaptor 5 JHS 01 Diagram 23 Diagram 24 Unrivalled Detection Page 24 of 32 www ionscience com TVOC MANUAL lon Science Ltd System recommendations For a gas sample system we have the following recommendations 1 Where possible use the Flow Adaptor as described above that is sold by ISL This has an integral o ring to seal the sensor housing and
13. Power The selector pins absence or presence determines the chosen F2 4 setti ng Screen Screen TVOC is shipped with all 4 selector pins fitted as shown in diagram 3 Diagram 2 Diagram 3 Diagram 4 shows the removal of 1 selector pin Diagram 4 The following table shows the selector pin combinations and the corresponding function v Selector pin fitted X Selector pin removed Selector pin A B C D Range Displayed units v v v v 1000 pom Default 7 v x v 100 ppm v x v v 10 ppm v v v x 2280 mg m v v x x 228 mg m x v x 22 8 mg m Selector pin B and C selects the ranges 10ppm 100ppm or 1 000ppm Selector pin D selects the units ppm or mg m Selector pin A Fault output range NOTE During an Alarm condition F1 or F2 the output will drop to either 3 5 mA or 2 0 mA Jumper A fitted 3 5 mA during an alarm condition Jumper A removed 2 0 mA during an alarm condition As default the TVOC has a 1000 ppm factory calibration WARNING if the 10 ppm or 22 8 mg m ranges are selected the TVOC will require a calibration using 10 ppm Isobutylene before use See Operation amp Calibration Sections Unrivalled Detection Page 9 of 32 www lonscience com TVOC MANUAL lon Science Ltd TVOC Setup NOTE TVOC is shipped with ALL selector pins fitted as standard TVOC only reads the selector pin settings when power is connected Always ensure power is disconnected from TVOC be
14. T E EEE rA E 18 SeN e ZER oragon e asnentetiovnetlwaenqaep a E E a A E E AE A E O OEE 18 Setting the gas concentration The actual value that the calibration has been supplied at 0 08 19 Geng Me SPAN seereis roroa ean n aeaea a e Ea Ae 19 MaM ena NG Es cys a es ease emcee unecee cata vane se cubase ceweeeacuee suenecesueeessecvucsevenneeeesas sucssss veuscesaseeosn 21 Cleaning replacing the lamp ccccscccccsseeceeeceeeeeceeeceeueeececaasseceeesseaseceeeesaaeeeessaeaeeeeessuaaeeeesssaaeeeeessaaaees 21 FUSE rupture and FEPIACEMEN cccceeeccecseeeeecseeeeeeceeeeeecaeeeeeeeeeeeecsageeeeaaeeeessaueeessaeeessageeeesseueeesseeeesssaneees 23 Lamp Warranty Statement ccccccccccssseeceeeceeeeeceeeceeeeeeeeesseeseeeeeseeeeeeeeeeeeeeeeeeeseeseeeeesseaeeeeeesseaseeeesssageeeeeeaas 23 DV SICNM FECOMMMENG ATION S scaire E ia aiaa aa 24 Remote area MOMNITOLING ccccccccseeececeeeeeeeceeseeeeeaeeeeseeeeeeseaseeeseaueeeeseeeeeseaeeeessaueeessaeeesseeeeesseeeeessneessnaeeees 24 Gas sample SYSTEMS eceeeeecccceeeeeeeeeseeeeeeeeeeaaeeseeceeeeessaeeeeseeceeeeseeaeaseceeeeeeseaaaseeceeeeessseaseeceeeeessaaagseseeeees 24 Instrument Warranty and Service sssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn nnmnnn nnmnnn mnnn 26 MM AUT AI car sn octet E ate A AEE E EE EE E EE E E E A A A E E EEA E EE 26 SEVI gene te ee E 26 Oe gre eg 9 yee een 2 en ee eee ee 26 BAIN SUS cree mw eee nie
15. a IS installations please also refer to the TVOC Intrinsically safe certificate for further details The TVOC safety rating permits its deployment in all hazardous areas of the quoted or less demanding rating For detail please refer to the marking on your instrument found on the front main label As of 1 of October units will be manufactured with two protection concepts applied by separate certifications Intrinsic safety ia and Non sparking nA All units manufactured up to that date will only have intrinsic safety a Intrinsic Safety ia permits the deployment in areas where explosive gases of group IIA IIB and IIC are intermittently present zone 1 with an ambient temp range of 20 C to 50 C Intrinsically safe installations will require the use of safety barriers and appropriate wiring b Non sparking nA permits deployment in areas where explosive gases of group IIA IIB IIC are unlikely but possible Zone 2 with ambient temp range of 20 C to 50 C Non sparking installations do not require safety barriers however the maximum working voltage should be strictly adhered to as a matter of safety As no safety barriers are required there is complete flexibility on the implementation of 3 wire system TVOC does require regular calibration onsite please see the Calibration section for more information TVOC calibration mode is accessed via a magnetic read switch system Unrivalled Detection Page 7 of 32 www ionscience com
16. alibration gas bottle Should you miss the desired reading quickly reapply the magnet to continue scrolling through the numbers and remove the magnet at the desired figure The selected number will be recorded 5 seconds after the removal of the magnet when the display stops flashing The display will initially show 90 should this be the desired figure remove the magnet straight away Setting the SPAN 1 Connect the SPAN gas to the calibration connector then the connector to the adaptor Do not over tighten the Luer fitting only a 1 4 turn is required Switch on the gas supply and then place the magnet over the logo The SPAN LED will flash and TVOC will display the direct millivolt mV output from the PID sensor Now remove the magnet Diagram 14 Calibration adaptor SPAN gas Calibration connector 2 The SPAN LED will stop flashing after approximately 2 minutes 3 Turn off the gas and disconnect the equipment Unrivalled Detection Page 19 of 32 www ionscience com TVOC MANUAL lon Science Ltd Calibration NB during the span measurement process the mV reading of the span must be greater than the zero level to pass the ZERO calibration stage An acceptable SPAN calibration level will result in the illumination of the GREEN LED An unacceptable SPAN calibration level will result in the illumination of the RED LED Should this occur the previous calibration levels will be used when the instrument returns to normal operation The Yellow spa
17. an F3 error occurs then check the cable is properly connected to the main PCB If not push it fully home F4 errors The F4 error occurs when the wrong selection on the jumper is used and it does not have any function Review the jumper selection in conjunction with section 4 TVOC set up Unrivalled Detection Page 28 of 32 www ionscience com TVOC MANUAL lon Science Ltd Spare parts Part Description Part number Calibration tool kit Calibration magnet Calibration adaptor Calibration connector Zero gas aspirator Carbon filter 2 x Allen keys A 849214 Flow adaptor Replaces the standard Sensor Cap Allows an external pump to be fitted as Shown in diagram below A 849246 Fixed Cal Adaptor Replaces the standard Sensor Cap Allows an external pip connection as Shown in diagram below 849217 PID Lamp cleaning kit Alumina powder and cotton buds A 31063 Span Gas kit 100ppm 100ppm Isobutylene 103Liters and Flow Regulator in a carry case A 845213 Span Gas kit 10ppm 10ppm Isobutylene 103Liters and flow Regulator in a carry case 849230 PID Cell Replacement PID Sensor 1 EO 2 Carbon filter User for ZERO span A 31057 Calibration magnet User to step through calibration A 849219 Electrode stack 1 EA 02 PID lamp A 833227 Sensor Light Guard Prevents bright light conditions causing 849245 False F2 alarms O Ring for Sensor Light Fits to outside of Sensor Light Guard 5 OV 11 Guard Calibration Adaptor Part of the Calibration toolkit Fo
18. ation gas for Ilsobutylene concentration Benzene 100 X 0 5 50 ppm lsoprene 100 X 0 7 70 ppm Isobutylene 100 X 1 0 100 ppm Carbon Disulphide 100 X 1 4 140 ppm Ethyl Acrylate 100 X 2 0 200 ppm For other gas response factors please refer to the lon Science web site or contact lon Science Ltd http www ionscience com GasSearch tabid 87 Default aspx WARNING Ignoring these guide lines may result in calibration failure loss of resolution or loss of range The default settings of TVOC are Detection range 1 1000 ppm Units ppm Duty cycle 5 seconds ON 55 seconds OFF TVOC gives a continuous 4 20 mA output which can be integrated into a DCS control system to give an indication of VOC levels in the operating environment Note the 4 20mA output must be externally powered with 8 35V In addition to the 4 20 mA output TVOC has an LCD display showing gas concentration and 4 colour LED s LED functions are as follows Green is an indicator of TVOC s working status Red is the fault indicator Yellow x 2 are calibration status indicators Please see Calibration for more information on LED status Unrivalled Detection Page 6 of 32 www ionscience com TVOC MANUAL lon Science Ltd Introduction to TVOC For installation requirements please refer to Installation and Technical Specification of this manual Before attempting an installation please fully read and understand this user manual and for hazardous are
19. c the points should be facing against the case in order to cut through the paint during tightening Two M20 cable glands and one blanking plug have been supplied as standard to ease installation in most circumstances These parts will not be appropriate for all applications so they should be used at the discretion of the installation engineer It is recommended that the manufacturer s instructions are followed for the gland and blanking plug installation The M20 blanking plug has been included to enable installations using a single entry cable for example a three wire system to be implemented While ion science can not recommend the cable gland suitable for every application the following information may be useful to the installation engineer for the selection of the appropriate cable gland e For intrinsically safe operation using safety barriers the only requirements on the cable glands are that they are better than IP20 rated This may seem extraordinary however where the power is safely limited to the TVOC it is intrinsically safe so does not rely on the prevention of dirt or moisture into the enclosure e For intrinsically safe operation in Zone 2 without safety barriers cable glands must be ATEX or IECX rated Ex e Ex n or Ex d and at least IP54 Installation of the TVOC depends on preferences of the installer Intrinsically Safe Operating legislation and the application lon Science suggests connecting the screens from cables via a gland
20. ding cable gland selection and use Change to EMC details as result of testing TVOC 3 0 Warranty Cover updated Declaration of Conformity updated Contents page updated Instrument Warranty and Service updated Addition of fault output level on page 9 Calibration fault LED indication changed on Page 20 22 23 TVOC 3 1 Addition of F3 and F4 fault to diagnostics section pages 27 28 amp 29 Additional notes in TVOC setup selector pin section page 11 TVOC 3 1 Addition wire C S A areas accepted on pages 14 amp 30 Mounting diagram 5 2 1 on page changed to general assembly drawing TVOC 3 2 Page 9 Text amended to emphasise when TVOC is un calibrated Page 14 Barrier part numbers removed Unrivalled Detection Page 31 of 32 20 02 09 V3 09 22 07 09 V3 10 1 09 09 V3 10 23 3 10 V3 10 22 07 10 V3 10 N A 07 08 10 V3 25 N A 08 09 10 V3 25 N A 06 10 10 V3 25 N A 06 11 10 V3 25 N A 20 12 10 V3 25 N A C oftware P N A N A N A N A NA N A Zz gt Z gt www ionscience com TVOC MANUAL lon Science Ltd TVOC 3 5 Barrier details removed for 14 01 2011 V3 25 technical specification notes added that 4 20mA requires external power TVOC 3 6 Pages 3 amp 4 updated to 23 03 11 V3 27 N A correct Quality Management System Page 5 Responsibility of use updated an legal notice added Page 18 Setting the gas tolerance changed to 0 1 20 0 to reflect instrument function Page 24 am
21. es to see if the lamp strikes on its own If F1 is still on screen after 5 minutes then look at the information below The first thing to check is to make sure the red cable between the sensor PCB and the main PCB is securely plugged in If the red cable is gripped inside the case it can be pushed into the sensor housing using the rigidity of the cable to make sure the connector is fully plugged in Then the connector on the main PCB should also be checked The build standard has been improved to pot the senor cable into the sensor housing so that it cannot come loose and provide improved strain relief at the Main PCB connection Where this has been done a an F3 diagnostic has been added to the software see F3 section below that indicates if the sensor cable has become disconnected at any point All instruments built with serial numbers newer than 10 01790 will have this improvement Unrivalled Detection Page 27 of 32 www ionscience com TVOC MANUAL lon Science Ltd Diagnostics The notes below will require some TVOC spares Next thing to try is to replace the pellet with another one if available and switch the instrument on to check remembering that the instrument should be left on for a few minutes if F1 appears straight away lf the instrument still shows this error then the lamp should be replaced if available and then the PID cell should be replaced after if it is still not cured If you do not have any spare pellets lamps or PID
22. fore changing setting or carrying out maintenance Never place selector pins on the programming port connector Ensure static build up is discharged before touching components IF the jumper selection is not a recognised option then error F4 will occur To recover switch the instrument off perform the correct jumper selection and switch the instrument back on Duty Cycle The TVOC has a variable duty cycle whereby the lamp is ON for 5 seconds and then OFF for a user set period between 0 to 5 minutes in 1 second increments The 4 20 mA output is updated at the end of each cycle As standard the TVOC duty cycle is 1 minute the lamp is ON for 5 seconds and OFF for 55 seconds The lamp OFF time is fully adjustable by the user Please refer to Operation Section of this manual under Adjusting the lamp OFF time for full instructions Unrivalled Detection Page 10 of 32 www ionscience com TVOC MANUAL lon Science Ltd Installation Location There are many variables involved in defining the optimum location for a gas detector Obvious though it may sound the most important rule is A detector will not detect gas unless gas actually reaches the detector TVOC should be mounted in the location most likely to detect gas TVOC must be mounted vertically with the sensor underneath the case This avoids dust and debris blocking the access to the detector cell Mount TVOC higher if detecting VOC gases that are lighter than air o
23. ill be set in the E 4 ri Ls ths TVOC memory 9 TVOC then continues through the standard start up routine If you are unhappy with the update frequency you have set you can adjust the time by placing the calibration magnet over the logo during the 5 seconds after the total time has been shown point 8 above NOTE The total duty cycle time includes the 5 seconds lamp ON time Therefore if you wish your total duty time to be approximately 2 minutes set the lamp OFF time to 1 minute 55 seconds At the end of the Start up routine TVOC will enter the selected monitoring routine Unrivalled Detection Page 16 of 32 www ionscience com TVOC MANUAL lon Science Ltd Operation LED s The GREEN LED indicates TVOC s working status ON Indicates the PID lamp is OFF Flashing Indicates the PID lamp is ON The RED LED indicates Fault status ON Indicates TVOC cannot function correctly The 4 20mA output drops to 3 5mA URGENT attention is required Flashing Indicates the TVOC cannot function but a reading is being attempted The Yellow Zero LED indicates during normal operation ON Last calibration zero level was outside expected limits The instrument will operate normally with the previous calibration The Yellow Span LED indicates during normal operation ON Last calibration Span level was outside expected limits The instrument will operate normally with the previous calibration last calibration carried out was outside expected lim
24. int 2 7 The response time of the system is defined by the sensor response rate and sample flow rate will in combination with the tube length and diameter as well as any dead volumes Unrivalled Detection Page 25 of 32 www ionscience com TVOC MANUAL lon Science Ltd Instrument Warranty and Service Warranty Standard Warranty can be extended to up to 2 years on the TVOC when registering your instrument via our website www ionscience com instrument regisitration To receive your Extended Warranty you need to register within one month of purchase Terms and Conditions apply You will then receive a confirmation email that your Extended Warranty Period has been activated and processed Full details along with a copy of our Warranty Statement can be found by visiting www ionscience com instrument registration Service lon Science is pleased to offer a number of service options on our TVOC product range that allow you to choose the instrument cover that best suits your needs At lon Science we recommend that all of our gas detection instruments be returned for service and factory calibration once every 12 months Contact lon Science or your local distributor for service options in your area Find your local distributor by visiting www ionscience com Contact details UK Head Office USA Office German Office lon Science Ltd lon Science LLC lon Science Messtechnik GMBH The Way Fowlmere 33 Commercial Drive Laubach 30 Cambridge
25. its The instrument will continue working but service is required Please see Section 7 Calibration for YELLOW LED status Selector pins TVOC has a range of options that are selected via the selector pins on the back of the main PCB please see the TVOC Set up Section The options are shown below with the defaults highlighted in bold 1 1000ppm or 0 01 10 ppm or 0 1 100 ppm ppm units or mg m units Calibration mode TVOC calibration mode can be accessed using the calibration magnet supplied in the TVOC calibration tool kit Part number A 845214 To enter calibration place the magnet over the top right of the lon Science Logo until the state changes i e an LED illuminates and or the display changes Ensure the magnet is withdrawn away from the magnetic switch by at least 1 cm once a change has occurred Calibration gases TVOC has three 3 ranges that can be selected however the 0 10ppm range requires the instrument is calibrated by the user before use The 0 100ppm and the 0 1000ppm ranges can initially run using the Factory calibration carried out during the instruments manufacture however because the 0 10 ppm range is more sensitive and more susceptible to environmental and system Diagram 10 tolerances the instrument must be calibrated before use If the 0 10 ppm range is selected TVOC will display the following screen to indicate that a calibration is required before it can be used Follow the calibrati
26. ivalled Detection Page 13 of 32 www ionscience com TVOC MANUAL lon Science Ltd Installation Hazardous location Warning The label on the enclosure details the IS and nA certifications The appropriate section of the Intrinsically Safe label should be covered up or blocked out to reflect the type of installation For Non Intrinsically Safe applications the label should be covered completely For Intrinsically Safe zone 2 applications with out safety barriers the ia certification details should be blanked out For Zone 1 or 2 IS applications with safety barriers the nA certification details should be covered This will prevent safety discrepancies and or mis use in the future should the equipment be moved or the site be re defined as a hazardous area Intrinsically Safe nA Non sparking applications for Zone 2 areas only Entry parameters Input power 5 to 24Vdc 80mA max Output power 4 20mA 8 35Vdc 22mA For information only please see Intrinsically Safe Operation certificate before installation The wiring of Intrinsically Safe systems is identical to the wiring showing for non Intrinsically Safe applications The only difference is the requirements to ensure that the power supplied used provides 24v or less in normal operation Intrinsically Safe IS applications Entry parameters Input power Ui 18V li 800mMA Pi 1 2W Ci OuF Li OmH Output power 4 20mA Ui 30V li 200mMA Pi 1 2W Ci OuF Li OmH For information only
27. mansuatainasinasueatncucadbens 5 O10 Fe Ages Coto 00s 61s ae ee ne On ene eee nee ne Oe ae a eee es ean ee eens 5 BE OOS All E E E N E quae A E A E E A E E E E E E 5 coga NOU E e E E E E E E NS 5 IMTFOGUGHON NG TOG eree e A E Oa A EAEE 6 BAG UI EIS eea a E EE A E a E AEE AE 8 aaa TV OG TAS RUINS T ea A T E tenes medeusnereteso esd teecnetadons 8 MVOC Calibration TOO WAM irena E E A EN E EE E A 8 TO SOUD i A S T E E 9 SCION m I e E TEA E PEE E EE E EE E TEAT A Gece toed EA E 9 BDUD OVCO ee E E E E E E E reece seeenees 10 BUS ea NRO OM a E O E es eines oaetsenie gad w ene eeaeeiesiaeaies 11 OCA NO g E EEE E sional E EN fuhaineu nine rect EA E E N 11 Cable and gland requirements cccccceccccccececeeeeseeceeeeeeeaeeeeeeeceeeeesaeeeeeeeeeeeeeseeeuseceeeeessseaseeceeesessaaageeseeeees 11 Dimensions tor MOUMUNG erssesnesni igen ene e iR a a R E a a 12 Power requirements a cciheszcnsatemnecsuinvnecsalennennutemeanesbensteaudesasial vacenenteneantutnsiedudevneatal rateumstensawiutamsicaniusnassalensenntie 13 Atal SAMO AOVA seseina E A Vensacind R 15 OPEFTER 16 Sea D o EE E E EOE EE E E E TAE E E A E EAEE E O O A 16 VC SMS AE E AE EEEE E A EE E E A A AEEA EEO T 16 Adjusting th lamp OFF UME csecsenek iann eA Ea n ERE eaii erR nak Ri ERREEN REAR RE 16 CED S EE E A EE E E 17 EOT a E E E E E E E E A 17 SION AONE NINOS E E T E A E E E E T ET AEAT 17 See IES e e pss E E E A TE E N E A A A T A AT 17 UM AO OCA Sse arco pate grenar a e a A E E A a ESEN
28. mination is not visible Cleaning of the lamp should be carried out on a regular basis depending on the duty cycle of the PID Lamp and the environment Diagram 18 Pellet Unrivalled Detection Page 22 of 32 www ionscience com TVOC MANUAL lon Science Ltd Maintenance The amount of humidity and quality of the ambient air will directly affect the time between servicing Warning Leaving contamination on the lamp window can cause irrecoverable damage to the PID Lamp 7 The Electrode Stack should be inspected for visible signs of contamination if contamination can be seen the Stack it must be replaced The Electrode Stack part number 1 EA 02 Reassembly 8 Place the clean PID Lamp into the PID Cell avoiding finger contact with the Window 9 Refit the Electrode Stack with the electrical pin holes and electrode contacts facing down 10 Refit the Metal Spring Cover 11 Ensure the Electronic Pins of the PID Cell are at the 12 o clock position before inserting the PID Electronic Pins Cell The PID Cell should insert into the connectors easily if significant resistance is felt remove the cell and check alignment before reinserting Diagram 19 Warning Irreparable damage will be caused by forcing the PID into the Sensor Holder if not correctly aligned NOTE Always calibrate TVOC after servicing is carried out Fuse rupture and replacement TVOC has a 125 mA BASEEFA certified fuse to provide intrinsicall
29. n LED will be illuminated to indicate the failure to calibrate the span Now place the magnet over the logo corner to return to normal monitoring routine The GREEN LED will start flashing as TVOC starts its cycle with a lamp ON cycle If either the ZERO and or SPAN levels were outside acceptable levels the RED LED will flash until an acceptable calibration has been carried out Unacceptable calibration levels will NOT be used TVOC will default to the previously stored acceptable calibration factor NOTE Always check the accuracy of your calibration by checking readings from TVOC when it is running normally using the ZERO filter and SPAN gas Accuracy of calibration is the responsibility of the person carrying out the calibration If in doubt seek advice TVOC must be calibrated after lamp cell cleaning or general maintenance NOTE Causes of contamination and error in signal Changes in air pressure when detecting ppm concentration Variation in Oxygen and or Argon beyond ambient levels Variation in ambiant moisture content Unrivalled Detection Page 20 of 32 www ionscience com TVOC MANUAL lon Science Ltd Maintenance Cleaning replacing the lamp TVOC has been designed to ensure servicing is quick and easy 1 Before servicing TVOC disconnect the electrical power supply 2 Remove the Locking Screw from the Metal Sensor Cap using the Allen Key supplied within the Calibration tool kit Calibration tool kit pa
30. on instructions before use Diagram 11 Unrivalled Detection Page 17 of 32 www ionscience com TVOC MANUAL lon Science Ltd Calibration Calibration routine lon Science recommends calibrating TVOC after any maintenance or lamp cleaning is carried out and on a 3 monthly basis to ensure TVOC is working to specification NOTE Please read this entire calibration procedure before attempting a calibration TVOC calibration has 4 stages 1 Setting the ZERO 2 Setting the gas tolerance Using clean gas via carbon filter 1 200 ppm Isobutylene on 0 100 ppm and 0 1000 ppm ranges 0 1 20 0 ppm Isobutylene on the 0 10ppm range Using the SPAN gas Am Am A m 3 Setting the SPAN GREEN STATUS LED ZERO LED SPAN LED FAULT LED Diagram 12 Setting the ZERO 1 Place the calibration magnet over the top right hand corner of the lon Science logo to enter calibration mode The ZERO LED will illuminate and the GREEN STATUS LED will extinguish 2 Remove the calibration magnet 3 Insert the calibration adaptor into the sensor cap attach the carbon filter to the calibration adaptor The carbon filter should be attached to the hand aspirator 4 Again place the calibration magnet over the logo The ZERO LED will flash during this stage TVOC displays a direct millivolt mV output from the PID sensor Diagram 13 Hand Calibration adaptor Carbon filter aspirator Unrivalled Detection Page 18 of 32 www ionscience com TV
31. p 25 System Recommendations added Page 26 contact details moved here Page 28 details of Sensor Light Guard added Page 29 Parts notes updated Pages 7 11 13 amp 14 ATEX comments changed TVOC 3 7 Page 30 Accuracy and 15 03 12 V3 27 S wing dagane and pe updated TVOC 3 9 Slight modification to 26 05 12 V3 27 installation instructions Page 11 Point 7 Page 30 IP clarification TVOC 4 0 Page 30 Accuracy 29 10 2012 V3 27 specification only Unrivalled Detection Page 32 of 32 www ionscience com
32. please see Intrinsically Safe certificate before installation lon Science Ltd suggest using the following Zener Barriers for IS approved applications Use competent installation engineers and ask them for installation and application advice Note e All cable lengths are estimated for zone 1 IIC installation of the equipment e Using 1mm C S A conductor S T P cables with capacitance per meter of 250pF m L R ratio of 25uH Q conductor resistance at 20 C of 18 4Q km e Calculation assumes cables are at 50 C Warning Intrinsically Safe IS applications e Units should not be powered using non IS power supplies prior to installation in an IS application e If non IS power is supplied the unit will require inspection by lon Science Ltd or an lon Science Approved service Centre prior to installation in an IS application TVOC fuses may not be replaced in the field If a fuse is blown TVOC will require inspection by lon Science Ltd or and lon Science Approved Service Centre before it is used in an IS application Unrivalled Detection Page 14 of 32 www ionscience com TVOC MANUAL lon Science Ltd Installation Hazardous location 4 wire Control equipment sensing 4 20 mA on return line Hazardous Area Safe Area 24Vdc Power supply DCS PLC Analogue input Diagram 8 Notes For intrinsically safe installations the enclosure may be opened while the system is live provided the work is undertaken by competent personal and
33. ports for connection of inlet and out let sample tubes Refer to Spare parts section for part number 2 The pressure difference of a pumped system relative to atmosphere should be minimised This is because any pressure difference will have an effect on gas concentration readings As pressure difference increases decrease the mass of gas in the sensing chamber will increase decrease and affect the response to any concentration of sensed gas This can be explained using the ideal gas equation PV nRT and cannot be avoided so should be calibrated out or compensated for Also please note when the system is under pressure any gas will be more searching so clear down is like to be slightly extended 3 The maximum pressure that can be applied to the TVOC sensor housing is 300mbar However this is not a recommended working pressure for the reasons stated above Ideally working pressure should be 30mBar of ambient pressure 4 Inline flow restrictions must be minimized Flow restrictions cause differential pressures which can directly affect the TVOC ready If flow restrictions are unavoidable the flow rate should be lowered to minimize the pressure effects this however will increase the response time 5 A flow between 250and 500 ml min is recommended for calibration This will ensure a full response to applied gas in a sensible time 6 The working flow should be very similar to that use to calibrate the instrument or errors in output will occur see po
34. r connecting to the standard cap for calibration A 849209 Unrivalled Detection Page 29 of 32 www ionscience com TVOC MANUAL lon Science Ltd Technical Specifications PID Sensor Lamp type With fence electrode technology 10 6eV Krypton TVOC enclosure ingress protection IP65 Sensor ingress protection Range Non IS applications ATEX approval IECEx approval Certificate number IS applications Input power 4 20mA power IP54 0 10 ppm 0 22 8 mg m 0 01 resolution 0 100 ppm 0 228 mg m 0 1 resolution 0 1 000 ppm 0 2280 mg m 1 0 resolution 5 28 Vdc 65 mA 0 5mm to 2 5mm C S A 8 35 Vdc 22 mA 0 5mm to 2 5mm C S A 4 20mA loop must be externally powered Input power 4 20 mA power II 3 G Ex nA IIC T4 20 C lt Ta lt 50 C II 2 G Ex ia IIC T4 20 C lt Ta lt 50 C Baseefa05ATEX0277 Entry parameters Ui 18V li 800mMA Pi 1 2W Ci OuF Li OmH Ui 30V li 200mMA Pi 1 2W Ci OuF Li OmH For information only please see ATEX certificate before installation Zener Barriers ATEX Non sparking approval Dimensions Height 181mm Width 124mm Depth 72 6mm Display Response Accuracy Linearity Calibration Temperature Humidity Required Ask your installation engineers for installation application advice II 3 G Eex nA IIC T4 40 C lt Ta lt 50 C nA for zone 2 only Weight 7 11 Instrument 1 3kg 2 9
35. r lower if detecting VOC gases that are heavier than air but never on the floor This should maximise detection Mount TVOC in an area that has good air circulation Restricting natural air current may result in delayed detection Never mount TVOC in direct sunlight or over a heat source such as a radiator This may cause TVOC to exceed its certified working range Do not mount TVOC in areas likely to flood Mount TVOC s in areas that are easily accessible for servicing Percentage variations in the composition of air 78 Nitrogen 21 Oxygen and 1 Argon may affect the detected signal Please refer to the technical specifications of the instrument under Technical Specifications of this manual before beginning a TVOC installation Cable and gland requirements The Screw terminal sockets for connecting wires in the TVOC accept wires of 0 5mm to 2 5mm C S A Screened cables for both power and signal out are necessary to achieve EMC compliance Cable screens must be terminated at both ends for them to be effective in achieving electromagnetic compatibility EMC The screens should be terminated to the TVOC enclosure using EMC compatible cable glands It is important for an EMC compatible gland to make electrical contact to the enclosure This is usually done using a serrated washer or EMC lock nut that bites through the paint making electrical contact EMC lock nuts have been provided These locknuts are orientation specifi
36. rt number A 849214 Warning Failing to remove the locking screw before unscrewing the Locking Screw Sensor Cap will damage the sensor holder Diagram 15 3 Unscrew the sensor Cap to access the PID sensor Sensor Cap 4 Remove the PID Sensor by withdrawing it from the Sensor Housing Only light force is required sult coe HO 2 Lhd git 0 ail cay 79002 py Aoma ami tll Warning Do not twist the PID Sensor while it is within the Sensor Housing aii PID Sensor Diagram 16 Sensor Housing Unrivalled Detection Page 21 of 32 www ionscience com TVOC MANUAL lon Science Ltd Maintenance 5 The PID Cell s Metal Spring Cover can be pulled off using moderate force The Electrode Stack and PID Lamp can then be removed Electrode by holding the PID Cell Stack upside down Warning Ensure the Electrode Stack and PID Lamp fall onto a soft surface such as a piece of tissue This will avoid damaging the parts as they fall out and avoids finger contact with the PID Lamp window PID Lamp 6 Clean the P D Lamp using Alumina Powder loaded l onto a cotton bud Diagram 17 Rub the Cotton Bud Alumina power on the Metal Spring PID Lamp Window using Cover a circular motion until a Cotton Bud Alumina light audible squeak can Powder be heard Alumina Powder NOTE Contamination of the Lamp Window can considerably reduce the detection capability of the PID Cell even when the conta
37. safety and result in unsafe conditions 2 For reasons of safety VOC must only be operated and serviced by qualified personnel 3 Please read and understand this user manual fully before installing operating or servicing TVOC Quality assurance TVOC has been manufactured in compliance with ISO9001 2008 which ensures that the equipment supplied to our customers has been designed and assembled reproducibly from traceable components and leaves lon Science calibrated to stated standards Disposal Dispose of TVOC and its components in accordance with all local and national safety and environmental requirements This includes the European WEEE Waste Electrical and Electronic Equipment directive lon Science Ltd offers a take back service Please contact us for more information Legal Notice Whilst every attempt is made to ensure the accuracy of the information contained in this manual lon Science accepts no liability for errors or omissions or any consequences deriving from the use of information contained herein It is provided as is and without any representation term condition or warranty of any kind either express or implied To the extent permitted by law lon Science shall not be liable to any person or entity for any loss or damage which may arise from the use of this manual We reserve the right at any time and without any notice to remove amend or vary any of the content which appears herein Unrivalled Detection Page 5 of
38. suitable safety precautions are taken This overrides the warning on the enclosure label Initial calibration TVOC is calibrated at lon Science before dispatch using 100ppm Isobutylene However if you wish to calibrate your TVOC once it is installed lon Science recommends that the TVOC is left to run on its chosen settings see TVOC Setup Section for 24 hours before an initial calibration is carried out to allow the instrument to settle into the working environment Unrivalled Detection Page 15 of 32 www ionscience com TVOC MANUAL lon Science Ltd Operation Start Up After electrical power is connected TVOC runs through a Start up routine which lasts for approximately 1 minute During this Start up routine TVOC demonstrates the following characteristics The LCD screen displays the software version number The GREEN LED flashes The 4 20 mA output is set to 4 mA 0 0 ppm NOTE If the 0 10ppm range is selected the TVOC will require calibration using 10ppm Isobutylene before use See the calibration section of this manual During this Start up time the user can adjust the lamp OFF time as referred to in TVOC Setup under the Duty Cycle section This time can be adjusted from 0 to 5 minutes in 1 second increments Cycle times To extend PID lamp life and the time between servicing TVOC includes Display a variable duty cycle see section 4 2 whereby the lamp is switched ON and OFF The length of time between
39. y safe protection when the unit is installed in hazardous areas This fuse may ruptures for example due to over voltage or a current surge if this is the case replacement is different depending upon the application being Intrinsically Safe or not For Intrinsically Safe IS applications the unit must be inspected and have the fuse replaced by lon Science Ltd or an lon Science Approved Service Centre The intrinsically safe rating is not maintained if the fuse is simply replaced For Non Intrinsically Safe Non IS applications the fuse may be replaced by an equivalent rated fuse and operation tested by qualified engineering personnel Lamp Warranty Statement Please note The standard warranty period for a 10 6 PID lamp is one year providing that the default duty cycle for lamp pulsing is used 55 seconds lamp off 5 seconds lamp on Unrivalled Detection Page 23 of 32 www ionscience com TVOC MANUAL lon Science Ltd System recommendations TVOC is generally used to measure gas concentrations in the ambient atmosphere The sensor is open to the atmosphere and any gas that diffuses or moves under convection into the locality of the TVOC sensor will be detected This is ideal for area monitoring however there are applications listed below that need adaption of the TVOC for operation 1 STANDARD 2 FLOW 3 FIXED CAL CONFIGURAION ADAPTOR CONFIGURAION ADAPTOR CONFIGURAION TVOC TVOC TVOC SENSOR HOLDER SENSOR HOLDER SENSOR H
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