TVOC User Manual V2.6
Contents
1. i i 16 6 Operation t i s l 17 Start up i l s i i l 17 Cycle times s l i t 17 LEDS l l l l l 18 Selector pins t l t l 18 Calibration mode i s l l 19 7 Calibration l s 20 Calibration routine l l l l 20 Setting the zero l l i 21 Setting the gas tolerance s l l j 22 Setting the span i l s 22 Display lamp life t i E l 23 8 Maintenance l l 24 Cleaning and replacing the PID lamp l 24 Fuse rupture and replacement s i 27 Lamp warranty statement i t E l 27 9 Diagnostics s i s 28 10 Spare parts i l l l l 30 11 Technical Specifications i s i 31 Page 4 of 32 TVOC MANUAL Ion Science Ltd 1 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 Ion 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 Warning 1 Substitution of components may impair intrinsic safety and result in unsafe conditions 2 For reasons of safety TVOC 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 TVO2. 6 2 Cycle times To extend PID lamp life and the time between servicing TVOC includes a variable duty cycle see section 4 2 whereby the lamp is switched ON Display and OFF The length of time between servicing and calibration is update increased where longer OFF times are selected However the length of L time between servicing also depend on ambient air quality the higher VOC concentration detected by the instrument then the shorter the time between servicing PID lamp duty cycle 6 2 1 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 right hand corner of the Ion Science logo Two numbers on the LCD screen will flash m 1 k JU 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 0 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 n
3. TVOC MANUAL Ion Science Ltd 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 If 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 cells then you will need to contact Ion 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 Instrument a x E Error Power to PID cell OFF PID lamp OFF but appears UN Light sensor Indicates Light x 7 Cause Ambient light on sensor PID Sensor T YOC switched on with PID cell removed F i If an F2 error is shown on screen this generally means that ambient light is getting to the light sensor on the sensor board This may be because the metal cap and PID cell have been removed from the instrument while main power is stillon or that the PID sensor has been left out when the cap has been screwed back on By replacing the cap and the sensor this error should go away In the event that the sensor and cap are both on the instrument and yet F2 is still on the
4. toxic gases or oxygen BS EN61000 6 6 2001 Electromagnetic Compatibility EMC Generic standards Emission standard for residential commercal and light industrial environments With respect to BS EN 50270 1999 the TVOC achieves performance criteria A the apparatus continues to operate as intended bef ore and after the test except at spot frequencies where t achieves criteria B the apparatus continues to perf orm after the test but during the test a degradation of performance is seen See technical specf ication f or details Other Standards BS EN ISO 9001 2000 Quality Management Systems i Requirements BS EN 13980 2002 Potentially Explosive Atmospheres Application of Quality Systems On behalf of lon Sdence Lid 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 E Rie A io Date 20 November 2008 TVOC MANUAL Ion Science Ltd Contents Page 1 Statements l 5 2 Introduction to TVOC s i i i 6 3 Packing List x E s 7 4 TVOC Set up 8 Selector pins 8 Cycle times l i s l l 9 5 Installation l s i s 10 Location E i s l i l 10 Mounting t l l 11 Cable requirements 12 Power requirements 12 Non Intrinsically Safe IS snplicaions l 12 Intrinsically Safe IS ain s 14 Initial calibration
5. C Page 6 of 32 TVOC MANUAL Ion Science Ltd 3 Packing List All items of equipment shipped by Ion 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 Ion Science Ltd within 10 days of receipt of shipment Ion Science cannot be held responsible for shortages not reported with in the period Standard TVOC instrument Item Description 1 TVOC instrument 1 2 TVOC Manual 1 TVOC Calibration Tool Kit Item Description 1 Calibration magnet 1 2 Calibration adaptor 1 E 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 Page 7 of 32 TVOC MANUAL 4 TVOC Setup 4 1 Selector Pins TVOC has a number of settings that can be selected by the user via a row of 4 selector pins mounted on the reverse side of the main PCB Diagram 4 1 shows the location of the functional selector pins labelled A B C amp D The selector pins absence or presence determines the chosen setting TVOC is shipped with all 4 selector pins fitted as shown in diagram 4 2 Diagram 4 3 demonstrates the removal of 1 selector pin Page 8
6. 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 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 Page 26 of 32 TVOC MANUAL Ion Science Ltd 8 Maintenance Fuse rupture and replacement TVOC has a 125 mA BASEEFA certified fuse to provide instrinsically 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 Ion Science Ltd or an Ion 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 Page 27 of 32 TVOC MANUAL Ion Science
7. Ltd 9 Diagnostics Below are two conditions your TVOC can be in when it is working correctly Fower supplied to the PIO sensor from TVUC TOC Instrument jo Lamp ONOFF w No fault with instrument Light forn Light controlled by TOC PD lamp Sensor Power to PID cell ON censor Housing PID lamp UN P Light sensor Indicates Light TOC Insimment Fs G w No fault with instrument Power to PID cell OFF PID lamp OFF Light sensor Indicates NO Light The two conditions shown below are of the instrument in an error state with potential checks cures for these faults TOC Insirumeni x F1 Error Power to PID cell ON PID lamp OFF Pip sensar Light sensor Indicates NO Light Cause Loose cable between sensor and main pcb Contaminated pellet Lamp failure Cell failure If 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 cycles 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 Page 28 of 32
8. Please refer to the technical specifications of the instrument in Section 10 of this manual before beginning a TVOC installation Page 10 of 32 TVOC MANUAL Ion Science Ltd 5 Installation 5 2 Mounting Dimensions for mounting TVOC are given in Diagram 5 2 1 below CO CO G I E c E amp Sj w l A et MS al S El 5 x 0 208 f3mm 2 874 104mm 4 094 124mm 4 882 27 03 08 Diagram 5 2 1 NOTE The TVOC case can be used as a template when marking out fixing holes but do not drill through the fixing holes Page 11 of 32 TVOC MANUAL Ion Science Ltd 5 Installation 5 3 Cable requirements Ion Science Ltd suggests using screened cables for both power in and signal out Cable screens must be terminated at the TVOC enclosure using EMC cable glands 5 4 Power requirements 5 4 1 Non Intrinsically Safe Non IS applications Input power 5 28Vdc 65mA max 4 20mA power 8 35Vdc 22mA 4 Wire System sa a ak ac cate Electrical Connection Non ATEX SCREEN UV 1 SCREEN gt A4 4 20mA k i O O 1 O Or V Diagram 5 4 1 3 Wire System a Page 12 of 32 TVOC MANUAL Ion Science Ltd 5 Installation 3 Wire System b Electrical Connection Non ATEX SCREEN ASE n WARNING Non Intrinsically Safe Non IS applications When the unit is installed with a non IS rated power suppl the IS details on the front of the u
9. added to 09 01 09 V3 09 back of manual TVOC 2 6 Diagram 5 2 1 31 3 08 v3 09 N A updated on page 11 Diagram 21 4 08 v3 09 N A updated on page 15 Declaration on 27 11 08 v3 09 N A conformity changeon A Diagnostics 20 02 09 v3 09 N added and P amp F barrier changed Page 32 of 32
10. see Section 4 TVOC Set up 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 Page 18 of 32 TVOC MANUAL Ion Science Ltd 6 Operation 6 5 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 Ton 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 6 6 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 tolerances the instrument must be calibrated using 10ppm Isobutylene 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 m m m Follow the calibration instructions before use Page 19 of 32 TVOC MANUAL Ion Science Ltd 7 Calibration 7 1 Calibration routine Ion Science recommends calibrating TVOC after an
11. C has been manufactured in compliance with ISO9001 2000 which ensures that the equipment supplied to our customers has been designed and assembled reproducibly from traceable components and leaves Ton 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 Ion Science Ltd offers a take back service Please contact us for more information Contact Ion Science Ltd By Post Ton Science Ltd The Way Fowlmere Cambridge SG8 7UJ UK By Telephone 44 0 1763 208503 By Fax 44 0 1763 208814 By Email info ionscience com Page 5 of 32 TVOC MANUAL Ion Science Ltd 2 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 Photoionisation 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 in section 4 TVOC set up and section 6 Opera
12. During the Zeroing process the mV reading on the display must reduce to bebw 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 previous zero calibration level will be used Page 21 of 32 TVOC MANUAL Ion Science Ltd 7 Calibration 7 3 Setting the gas tolerance l Now again place the calibration magnet over the corner of the logo E f The GREEN or RED LED will be extinguished and the numeric display DE will start to flash 2 If the 0 10ppm range is selected you will be able to adjust between 9 0 ppm and 11 0ppm for both the 100 ppm and 1000 ppm ranges a tolerance of between 90 and 100 ppm can be selected Leaving the magnet in position will cause the displayed number to count through the tolerance remove the magnet when the displayed value matches that stated on the Calibration 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 100 should this be the desired figure remove the magnet straight away 7 4 Setting the SPAN l Connect the SPAN gas to the calibration connector then the connector to the adap
13. Entry parameters Input power Ui 18V Ti 800mA Pi 1 2W Ci OuF Li OmH 4 20mA power Ui 30V Ti 200mA Pi 1 2W Ci OuF Li OmH For information only please see ATEX cettificate before installation Zener Barriers Ion Science Ltd suggest using the following Zener Barriers for ATEX IS approved applications Ax your installation engineers for installation and application advice Manufacturer Pepperl Fuchs MTL Stahl Pepperl Fuchs Dimensions Height 181 mm Width 124mm Depth 72 6mm Display Response Accuracy Linearity Calibration Temperature Humidity Manufacturers part number Z715 7715P 990 1 01 158 270 101 KFD2 SD Ex1 17 Weight 7 11 Instrument 1 3kg 2 9 Ib 4 88 2 Packed 1 47kg 3 2Ib 2 859 7 Segment 4 Digit LCD 4 Colour LED s Sensor T90 lt 5sec TVOC updates the output once evay 2 minutes 5minutes or 10 minutes 0 100 ppm or 0 10 ppm 2 100 1 000 ppm 5 0 100 ppm gt 98 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 The Fi condition lamp off is triggered at heavy industrial level of radiated emissions 10V m from 112MHz to 182MHz and 358Mhz to 375MHz The instrument will recover after the radiated emissions have ceased Page 31 of 32 TVOC MANUAL Update Log Ion Science Ltd Firmware TVOC V2 2 TVOC 2 3 TVOC 2 4 TVOC 2 5 Log
14. IIC installation of the equipment e Using imm 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 40 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 IfnonIS powe is supplied the unit will require inspection by Ion Science Ltd or an Ion Science Approved Sevice Centre prior to installation in an IS application e TVOC fuses may not be replaced in the field e Ifafuseis blown TVOC will require inspection by Ion Science Ltd or and Ion Science Approved Sevice Centre before it is used in an IS application Page 14 of 32 TVOC MANUAL Ion Science Ltd 5 Installation PE A E ee ee Electrical connection using Zener Barrier ee a TVOC SCREEN s i Control equipment MR boon 7 i o a Q i L i a ov a 2 l E i a N i V a E si 7 SCREEN Bigs i gt 52 E a E ee l A DAEZ 4 z i r S U i ea ere OSTES EEE ara L 0V 8 I L i I E E L gi Sebel Ran 2 vette Taa rea nad i E Da ete aie cea ee gate eet a tg Diagram 5 4 2 1 Control equipment sensing 4 20 mA at supply rail nn et ee a Electrical connection using Zener Barrier ee eae 7 TVOC SCREEN a Control equipment i r LE a a S E EA g T V i o L L i l i E L l v r N e 2 i l B G i a l i l B K l l j B
15. TVOC User Manual V2 6 Part No 849215 Advanced Gas Sensing Technologies www ionscience com lon Science Ltd The Way Fowlmere Cambs SG8 7U4J U K Tel 44 0 1763 208 503 Fax 44 0 1763 208 814 Email info ionscience com Web www ionscience com TVOC MANUAL Ion Science Ltd Page 2 of 32 DECLARATION OF CONFORMITY Manufacturer lon Science Ltd The Way Fowmere 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 I 2G Ex ia lIC T4 20 C OTa 50 C Notified Body Baseefa Ltd 1180 Buxton UK EC Type Examination Certificate s Baseefa05ATEX0277 latest supplement Baseefa03ATEX742 2 issued 24 November 2008 IECEx BAS 06 0057 latest revision no 1 issued 20 November 2008 Standards BS EN60079 0 2006 Electrical Apparatus for Potentially Explosive Atmospheres General Requirement BS EN 60079 11 2007 Explosive Atmospheres Equipment Protection by Intrinsic Safety 06 BS EN61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use General requirements Directive 2004 108EC Electrical Equipment Electromagnetic Compatibility EMC BS EN 50270 1999 Electromagnetic compatibility Electrical apparatus for the detection and measurement of combustible gases
16. display please contact Ion Science for some assistance Page 29 of 32 TVOC MANUAL Ion Science Ltd 10 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 849218 Fixed bump adaptor Replaces the standard Sensor Cap Allows an external pip connection 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 Isobuty lene 103Liters and flow Regulator in a carry case 849 230 PID Cell Replacement PID Sensor 1 EO 02 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 Page 30 of 32 TVOC MANUAL Ion Science Ltd 11 Technical Specifications PID Sensor Lamp type With fence electrode technology 10 6eV Krypton TVOC Ingress protection IP65 Sensor Ingress protection IP54 Range 0 10 ppm 0 22 8 mg m 0 100ppm 0 228 mg m 0 1 000 ppm 0 2280 mg m 5 28 Vdc 65 mA 8 35 Vdc 22 mA Non IS applications Input power 4 20 mA power Intrinsic safe approvals II 2 G EEx ia IIC T4 40 C lt Ta lt 60 C Certificate number Baseefa05ATEX0277 IS applications
17. f 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 see section 6 1 of this manual for full instructions Page 9 of 32 TVOC MANUAL Ion Science Ltd 5 Installation 5 1 Location There are many variables invoWed in defining the optimum location for a gas detector Obvious though it may sound the most important rule is e 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 undemeath 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 or 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 where it s subjected to rain fall water aerosols mist or heavy condensation Mount TVOC in areas that are easily accessible for servicing e Percentage variations in the composition of air 78 Nitrogen 21 Oxygen and 1 Argon may affect the detected signal
18. i 1 1 Ee a K I L 1 l E l l A i i i v i Laa I Diagram 5 4 2 2 Control equipment sensing 4 20 mA to OV Electrical connection using Zener Barrier VOC 4 SCREEN s i Control equipment WA a S Diagram 5 4 2 3 Control equipment sensing 3 wire Page 15 of 32 TVOC MANUAL Ion Science Ltd 5 Installation 5 5 Initial calibration TVOC is calibrated at Ion Science before dispatch using 100ppm Isobutylene However if you wish to calibrate your TVOC once it is installed Ion Science recommends that the TVOC is left to run on its chosen settings see Section 4 TVOC Set up for 24 hours before an initial calibration is carried out to allow the instrument to settle into the working environment Page 16 of 32 TVOC MANUAL Ion Science Ltd 6 Operation 6 1 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 I the 0 10ppm range is selected the TVOC will require calibration using 10ppm Isobutylene before user See the calibration section of this manual During this Start up time the user can adjust the lamp OFF time as referred to in Section 4 2 This time can be adjusted from 0 to 5 minutes in 1 second increments
19. lectrode 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 PID Lamp using Alumina Powder loaded onto a cotton bud Rub the Cotton Bud Metal Spring Alumina power on the Cover PID Lamp Window using a circular motion until a light audible squeak can Cotton Bud Alumina G heard K Powder Alumina Powder NOTE Contamination of the Lamp Window can considerably reduce the detection capability of the PID Cell even when the contamination 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 Page 25 of 32 TVOC MANUAL Ion Science Ltd 8 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 wire racing down 10 Refit the Metal Spring Cover 11 Ensure the Electronic Pins of the PID
20. nit are not appropriate for the system The IS label should be covered up or blocked out This will prevent safety discrepancies and or mis use in the future should the equipment be moved or the site be re defined asa hazardous area Page 13 of 32 TVOC MANUAL 5 Installation Ion Science Ltd 5 4 2 Intrinsically Safe IS applications Entry parameters Input power Ui 18V Ti 800mA 4 20mA power Ui 30V Ti 200mA Pi 1 2W Ci OuF Li OmH Pi 1 2W Ci OuF Li OmH For information only please see ATEX cettificate before installation Ton Science Ltd suggest using the following Zener Barriers for IS approved applications Use competent installation engineers and ask them for installation and application advice POWER SUPPLY Suggested barriers for INLET power supply Manufacturer Manufacturers pt no Type Cable length estimate Pepperl Fuchs Z715 Zener barrier 1115 meters Pepperl Fuchs KFD2 SD2 EX1 1065 Galvanic isolator 1217 meters MTL 7 15P Zener barrier 772 meters Stahl 990 1 01 158 270 101 Zener barrier 500 meters Stahl 9143 10 156 065 10 Galvanic isolator SIGNAL OUTPUT Suggested barriers for 4 20mA OUTLET Manufacturer Manufacturers pt no Type Pepperl Fuchs Z728 Zener barrier Pepperl Fuchs KFD2STC4 Ex1 Galvanic isolator MTL MTL7787 Zener barrier MTL MTL5042 Galvanic isolator Stahl 900 1 0 1 280 110 141 Zener barrier Stahl 9160 13 11 11 Galvanic isolator NOTE e All cable lengths are estimated for zone 1
21. of 32 Ion Science Ltd Selector Pins Programming port a ABCD 4 20mA Power SCreEn Screen Diagram 4 1 Diagram 4 2 Diagram 4 3 TVOC MANUAL Ion Science Ltd 4 TVOC Setup The following table shows the selector pin combinations and the corresponding function v Selector pin fitted xX Selector pin removed Selector pin A B C D Range Displayed units v n a v v v 1000 ppm Default v n a v x v 100 ppm v n a x v v 10 ppm v n a v v x 2280 mg m v n a v x x 228 mg m v n a x v x 22 8 mg m Selector pin B and C selects the ranges lt 10ppm 100ppm or 1 000ppm Selector pin D selects the units ppm or mg m Selector pin A Currently not used IMPORTANT if the 10ppm range is selected the TVOC will require a calibration using 10ppm Isobutylene before use See the calibration section of this manual 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 before changing setting or carrying out maintenance Never place selector pins on the programming port connector Ensure static build up is discharged before touching components 4 2 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 o
22. onsibility of the person carrying out the calibration If in doubt seek advice N 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 k Variation in ambient moisture content Page 23 of 32 TVOC MANUAL 8 Maintenance Cleaning replacing the lamp Ion Science Ltd TVOC has been designed to ensure servicing is quick and easy 1 Before servicing TVOC disconnect the electrical power suppl 2 Remove the Locking Screw from the Metal Sensor Cap using the Allen Key supplied within the Calibration tool kit Calibration tool kit part number A 849214 WARNING Failing to remove the bcking screw before unscrewing the Sensor Cap will damage the sensor holder 3 Unscrew the sensor Cap to access the PID sensor 4 Remove the PID Sensor by withdrawng it from the Sensor Housing Only light force is required WARNING Do not twist the PID Sensor while it is within the Sensor Housing Locking Screw Sensor Cap PID Sensor Sensor Housing Page 24 of 32 TVOC MANUAL Ion Science Ltd 8 Maintenance Ul 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 E
23. tion IMPORTANT if the 10ppm range is selected the TVOC will require a calibration using 10ppm Isobutylene before use The default settings of TVOC are Detection range 0 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 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 section 7 Calibration for more information on LED status For installation requirements please refer to sections 5 and 10 of this manual For Intrinsically Safe IS installations please also refer to the TVOC ATEX certificate for further details Before attempting an installation please fully read and understand this user manual TVOC does require regular calibration onsite please see section 7 Calibration for information TVOC calibration mode is accessed via a magnetic read switch system The TVOC intrinsic safety rating permits its deployment in all hazardous areas of the quoted or less demanding rating That is in areas where explosive gases of Group IIA IIB and IIC are intermittently present Zone 1 within an ambient temperature range of 20 C and 60
24. tor Do not over tighten the Luer fitting only a 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 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 NB During the SPAN the displayed mV reading must reach at least 80 mV to pass the SPAN calibration stage Page 22 of 32 TVOC MANUAL Ion Science Ltd 7 Calibration 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 span calibration level will be used Now place the magnet over the logo comer to retum 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 where 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 N Always check the accuracy of your calibration by checking readings from TVOC when it is running normally using the ZERO filter and SPAN gas N Accuracy of calibration is the resp
25. umbers between 0 k i f and 5 minutes Remove the magnet when the desired time is displayed A Page 17 of 32 TVOC MANUAL Ion Science Ltd 6 Operation 7 After 5 seconds the entire output frequency is displayed 8 After a further 5 seconds the set frequency will be set in the ri f T U 1 TVOC memory Lf 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 6 3 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 last calibration carried out was outside expected limits The instrument will continue working but service is required Please see Section 7 Calibration for YELLOW LED status 6 4 Selector pins TVOC has a range of options that are selected via the selector pins on the back of the main PCB please
26. y 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 Using clean gas via carbon filter 2 Setting the gas tolerance 90 110 ppm Isobutylene on 0 100 ppm and 0 1000 ppm ranges 9 11ppm Isobutylene on the 0 10ppm range 3 Setting the SPAN Using the SPAN gas GREEN STATUS LED ZERO LED SPAN LED FAULT LED Page 20 of 32 TVOC MANUAL Ion Science Ltd 7 Calibration 7 2 Setting the ZERO 1 Place the calibration magnet ove the top right hand comer of the Ion 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 milivolt mV output from the PID sensor and Cali bration adaptor Carbon filter aspi rator 5 Slowy 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
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