INSTRUCTION MANUAL WebEye WE/3-6-9 & WebEye WE/3
Contents
1. Measurement 0 20 mA P3 zero P2 span uf j positive test terminal lt 1 y o negative test terminal m Optics cable N amp A mli 23 4 5 6 IRAMPLIFIER LED s1 P4 Sensitivity 5 N 4 20mA O01234 5 N T Alarm 1 Alarm 2 Nokeval 2021 AC Power Supply 85 240VAC WE wiring Nokeval 2021 Display Slot_ Pin IR Amplifier pin 34 Oo 14 J GND A 6 24VDC Oo 2 A 5 Measurement0 20mA 3 Output signals Power supply ro 85 240VAG 85 240VAC Figure 15 WE 3 6 9 wiring diagram January 2005 W41100001 V4 2 Page 11 of 21 Sad KAJAANI PROCESS MEASUREMENTS 6 2 WE 3 6 9 LT wiring Connect the external cables according to the wiring diagram 16 Internal wiring has been made according to figure 15 234567 2 segece gt 3333 O NN ANONN Termina2. Pipers putty Air flows toward the sensor head from the amplifier housing or the junction where the pipers putty may be used Figure 3 Example of WE 3 6 9 purge air arrangement January 2005 W41100001 V4 2 Page 4 of 21 N 3 Operating principle The WebEye operates on a proven non contact reflection principle An optical sensor is placed above or under the web to be monitored applications include paper or board webs wires or felts The sensor is not affected by dirt steam or temperatures up to 177 C 350 F when installed according to Kajaani Process Measurements specifications Fiber optic cables R Transmitter Optical vn Sensor M cn E gt s IR Receiver Figure 4 Operating principle The optical sensor is connected through a fiber optic cable to an IR amplifier located at the end of the sensor tube The IR amplifier sends the light from the transmitter element through the fiber optic cable onto the monitored surface The reflected light is picked up and transmitted through the fiber optic cable to the IR receiver of the amplifier This returning signal is converted to an on off voltage as relay output or a 4 20 mA current signal The self cleaning sensor head is a 25 4 x 305 mm 1 x 12 stainless steel tube with two holes at the head serving as eyelets for the fiber optics and outlets for purge air Continuous airflow through the stainless st
3. Select Square root OFF AJ Scroll between alternatives hi Ch M2 i Conf DEC default 2 jA1 A2 M1 m2 fi Cont Number of decimals in display p2 OM CM2 Gl Cont Set to 0 Display scaling to read same with input Oa O Omi Oe Bl cont i default 20 DO Ch2 Ci mM Gi cont Set to 20 or to 91 Lo 0 Hi 20 Display scaling to read 0 100 when input is 0 22 mA Lo 0 Hi 91 J1 CA2 CIMIC m2 Gl Conf Filter default 1 0 p2 COM CM2 M Cont Set to 1 0 Set damping time to 0 second selectable 0 01 1 0 1 0 no filter Oa OOM mM M cont DISP default 7 O a2 O Mm O mM Gi cont Set to 7 Set display averaging range 1 8 a1 CA2 OM O M2 Gl Cont Peak default ON Oa Che OM mM i cont Calibr skip j1 p2 O0 Mm M2 M Conf SETCod defaults OFF AV J1 CA2 CIMIC m2 Gl Conf SLOT b mA output signal Factory settings not used 42 M1 CM2 il Cont ALCode Mi _ m2 il Cont CFCode Activate deactivate the Min max memory M2 Hil Conf ai CA2 M1 M2 fil Conf ON
4. INSTRUCTION MANUAL WebEye WE 3 6 9 amp WebEye WE 3 6 9 LT Fiber Optic Web Break Detector W41100001 V4 2 January 2005 N Table of contents T DESCriPt OM irnn nanni e EaR Aa E E a raai 3 2 Self cleaning sensor Nead i 2 2 ccssteddedswnd eden ctcedvseuveadnelsediguedadebedetsacgeeaaieedaans 4 3Operating principle sissano denian anaa sada ven a aa tea a Ea did 5 4 Technical data 2 ccccenugetsdaqavsdepiegauaeciiaessediseacs NEE Aa NEE EEA 5 5 Installation INSWUCTIONS sna aaa a aE EEA 6 5 1 Delivery IMIS sscccaes ts arno a E AAAA NE E 6 5 2 Sensor INStallatlON sssrinin a AA REAR EAAS 7 5 3 Installation of the rigid conduit and the display unit WE 3 6 9 8 5 4 Installation of the rigid conduit WE 3 6 9 LT ceceeeeeeee eee ee eee eeees 8 5 5 Installation of the fiber optical cable for WE 3 6 9 LT 2 0eee 9 6 WINING cieiecadventncteteieesidedheetancedcuidemedetandne a a NTA ADN ENTEN 11 6 1 WE 3 6 9 WINING iscissi a ia a a a 11 6 2 WE 3 6 9 LT WITiING 0 ccc cece eee eee rere eee neater ieee nen ened 12 7 Display unit operation and Configuration ceeeeeeeeeeneeeeeeeenteeeeeeeeneeeeseeneeeeeseeaes 13 7 1 M in MONU eee ere tre eee ee ieee erie ee eee neee eee nieeeeeeeniieeeeereea 13 7 2 Display unit Configuration 0c eee e cette eee et een ea eaeneaeeeenes 13 7 3 Sensor position tUNING 0 cece eee rere eee eee eee e a eaet
5. J S2 operation CE no reflection J nes fa a eee reflection S1 P1 sensitivity Figure 21 IR amplifier Connections and settings 1 Remove the cover Connect the IR amplifier according to connection figure 10 Place switch S1 to the position FAR and S2 to position 2 DARK Max out span pot P2 by turning clockwise until clicks are heard Set the sensitivity to max by turning P1 clockwise until clicks are heard Mount light cable and place sensing head into correct position for viewing the web Turn on the power supply green or red LED must be lit Warm up time of IR amplifier is approximately 10 minutes before optimal performance is obtained ONOarR WN January 2005 W41100001 V4 2 Page 18 of 21 N display unit terminal 5 about 0 1 mA With open space no sheet under sensor adjust zero pot P3 to 0 mA Measure on 10 Put sheet under sensor and observe mA input on terminal 5 of display unit output should be 10 15 mA If not adjust sensor distance from the sheet or tune sensitivity pot of IR amplifier 11 Remove the test sheet Repeat step 9 12 Repeat steps 9 and 10 until the sheet and no sheet signal settings are both correct 13 Reinstall IR amplifier cover leave all switches in above positions Note The light cables must be handled carefully broken fibers dirt or contamination deteriorate the switching behavior and diminish sensor performance Not
6. monitoring the minimum and maximum measurement values and setting the alarm limits 7 2 Display unit configuration For entering into the programming mode press A and keys simultaneously for 2 seconds To exit from configuration mode you have to accept changes display SAVE press or to cancel changes display UNDO press P The default values are as follows 1 Input signal 0 20 mA linear Signal level from the IR amplifier ranges from 0 to 22 mA Number of decimal points in display DEC 2 Display scaled same as input signal 0 20 Lo 0 Hi 20 Filter damping of input signal 1 0 no damping If filtered would cause delay of alarm Display reading DISP damping average of 7 measurements Averaging of display does not affect alarm relay speed Min max memory Peak ON activated Passwords SETCode not in use 8 Alarm settings Slot C for both relay 1 and 2 alarm activated hysteresis 0 trigged when signal below limit automatic reset of alarm when signal returns above trigger level alarm contact normally open gr ea o NO January 2005 W41100001 V4 2 Page 13 of 21 ai Ch2 Mm M2 17 82 Main Display Enter configuration mode by pressing at the same time for more than 1 second Wi Lhe M2 ll Conf Input default 0 20 mA j2 M1C M2 il Conf Select 0 20 mA J1 CA2 CIMC M2 E Conf
7. Type in 6 character password twice 1 CA2 CIMIC M2 Gl Cont Select OFF Password required to change alarm level if ON M2 ll Conf 4 CA2 CIM CM2 ll Cont ON Type in 6 character password twice i Lhe M2 ll Conf Select OFF Password required to to enter configuration mode if ON M M2 ll Conf t 0 M2 ll Conf p2 CM1 CM2 E Cont Edit Hi Set to 22 default 22 Flowchart 2a Setting the basic parameters of display unit January 2005 W41100001 V4 2 Page 14 of 21 N a1 CA2 mi C m2 fil cont OM Cee Omi Bil cont OM Ca C1 M2 Bil Cont OM Che CMD El Cont OA Che M12 Bil Cont Default alarm levels Alarm Settings activated skip Relay 2 15 mA AN AV AV 5 Hysteresis of alarm is OM CP OMi CM2 Bil cont COM CA CIM M2 Bil Conf set to zero Hysteresis Set to 0 default 0 AV Selection of alarm OM D2 Fmt Due Bil cont At C2 Ci m2 il cont direction Type Select AL LO AL Lo Low level default Alarm Low or AL HI AL Hi High level AV Alarm reset Cat C2 Cit 12 Bill Cont At C2 Ci 12 Bil Conf Manually from front Reset Select Auto panel or automatically default automatic User manual Vy Relay direction Ost Che C1 C2 Bl cont CM CA2 OMi C2 Bill cont Contact Select no or nc no normally open nc normally closed default normall
8. dry contact relays 230V 2A max Weight 4 4 kg 10 Ibs Dimensions L x H x D 220 x 245 x 145 mm 6 x 4 5 x 5 7 Sensor head 25 4 mm 1 SS tubing 305 mm 12 Long Extension tube25 4 mm 1 SS tubing 1500 mm 59 Long Amplifier housing31 75 mm 1 1 2 NPT 305 x 50 8 x 76 2 mm 12 x 2 x 3 Fiber optics not shown 3 m 10 6 m 20 or 9 m 30 lengths are availab Figure 6 Dimensions 5 Installation instructions Note Do not mount several fiber optic sensing heads side by side a mutual interference may occur 5 1 Delivery limits WE 3 6 9 Manufacturer supplied components e WebEye sensor head 1 ea e Extension Tube with position memory 1 ea e Mounting clamps 2 ea e IR amplifier housing IR amplifier enclosed 1 ea e Display Unit 1 ea e Flexible conduit for fiber optical cable protection SS tubing 1 diameter e Option Mounting rack e WE 3 6 9 LT Manufacturer supplied components e WebEye sensor head 1 ea e Extension Tube with position memory 1 ea e Mounting clamps 2 ea e Flexible conduit 26 1 diameter 2 ea fig 12 e Control Box 1 ea e Option Full length flexible conduit fig 13 e Option Mounting rack January 2005 W41100001 V4 2 Page 6 of 21 A KAJAANI O PROCESS MEASUREMENTS 5 2 Sensor installation The sensor should be installed about 25 cm 10 in from the edge of web and 15 cm 6 above it standard ran
9. 00LT Break Detector 2 Flexible Conduit 3 Connector 4 Fiberoptic Cable 5 Rigid Conduit 6 Flexible Conduit 7 Connector control box 8 Connector amplifier 9 Installation Adaptor Instrument CSSS SSS gt ISISI a Flexible tubing from air supply to conduit LH NM THO GRRL Infra Red Amplifier approximately 10 inches Instrument Air no eo ois 2 Figure 13 Installation of WE 3 6 9 LT fiber optical cable Flex Figure 14 Instrument air purge arrangement Supply dry and clean filtered instrument air at 10 psi to the cabinet A small flexible hose tube should be connected to the air fitting on the bottom of the cabinet and pushed into the conduit 6 approximately 10 inches This ensures that the majority of the purge air is pushed down into the conduit and that a small amount bleeds back into the actual cabinet enclosure Seal all connections and cover all other cabinet openings Page 10 of 21 W41100001 V4 2 January 2005 N 6 Wiring 6 1 WE 3 6 9 wiring Wire the IR amplifier housing according to the wiring diagram 15 Note Improper wiring will fatally damage the display and IR amplifier Make all connections before applying power
10. A1 and A2 alarm directions set to alarm when signal exceeds trigger levels see flowchart 2b A1 alarms for wrapping Trigger level e g 10 mA and activated when exceeds trigger level A2 alarms for service Triggered if signal from sensor without wrap drifts above e g 5 0 mA January 2005 W41100001 V4 2 Page 17 of 21 N 8 To set password and protect settings Configuration and change of alarm levels can be protected by separate 6 character passwords Configuration protection is activated in CFCode menu see flowchart 2a The code is entered by pressing front panel keys A V gt in wished order You can imagine that A 1 W 2 3 and 4 to memorize the code The code must be repeated before it is accepted Alarm level password is set in ALCode menu Example to set configuration protection Press A and for 2 seconds SetCod ALCode CFCode On A A A A A A P A A Save P The code would be then 113411 9 Operating and setting instructions for the IR amplifier If doing set up in instrument shop observe installed distance on machine and duplicate during set up Use same paper as on machine Please notice that temperature might be totally different as on machine Factory settings are suitable for most applications When the unit is received by the customer the IR amplifier is adjusted as described below Normally these adjustments need not to be changed P3 zero P2 span 123456 terminal strip IF
11. awn on x axis and trend not really seen from the DCS window January 2005 W41100001 V4 2 Page 15 of 21 N To elevate the signal adjust Lo mA output to 1 This gives 4 7 mA or 4 output during a break 0 22 mA from IR amplifier equals to 4 7 20 mA or 4 100 in DCS display Refer to flowchart 2a SLOT b menu A Output signal At this point the sensor is starting to get dirty 20 mA amp User gets service alarm long before Service sensor would give a false break signal CNTEE A Gere O ae OS ate Steere ODER z AO O S G et A eee tees a 4 v Web break 4mA gt Figure 17 Output signal 7 6 Case 1 The sensor monitoring breaks with open space behind the sheet For optimum performance sheet on calibration should be done when the paper machine is running at production speed Sensor head adjusted so that the IR amplifier signal is about 20 mA with paper on and about 0 mA without paper Break Detector gt Web open draw Figure 18 Free space behind the paper web WebEye output is scaled to 4 20 mA to correspond to 0 22 mA signal from IR amplifier 0 0 mA from IR amplifier means 4 mA output to DCS In the trend display of a DCS this equals to 0 For better visualization 4 20 mA output can be scaled to correspond to 1 22 mA mA input During break DCS would read 4 and with web on 87 Alarm limits can be set as follows A1 alarms when break trigger point e g 10 mA and ac
12. d tighten the stop screw If the sensor is removed for maintenance the memory ring ensures that the sensor head is positioned exactly in the same position when re installed Feed the free end of the fiber optic cable through the flexible conduit while the conduit is still loose Secure the conduit so it does not move along its route to the IR amplifier housing leaving 15 cm 6 exposed Figure 9 Position memory Note Use caution when pulling fiber optic cable through the conduit Fiber optic cable is a fragile material January 2005 W41100001 V4 2 Page 7 of 21 N 5 3 Installation of the rigid conduit and the display unit WE 3 6 9 Run 1 or 1 rigid conduit from display location to IR amplifier housing location pulling the four conductor cable or wire through the conduit Leave about 1 2 m 4 of free cable at the IR amplifier end Position the IR amplifier housing beyond hot temperature less than 70 C 160 F Feed the wire cable into IR amplifier housing and screw housing onto the 1 4 rigid conduit Feed the exposed fiber optic cable into the IR amplifier unit and attach it to IR amplifier Attach the flexible seal tight conduit to IR amplifier housing Mount the display unit and wire the display according to the wiring diagram WebEye Rigid conduit runs under floors through walls etc between the amplifier and the display unit locations Displa
13. e Use IR amplifier only with connected light cable Note Keep distance from the web same during all set up procedures 10 WebEye trouble shooting guide Note Make sure that the break detector is not on control before starting trouble shooting activities Sheet on signal is too small less than break level e check sensor alignment should face paper web e check that the eyes are clean e check if switch S1 is in the correct far position e check if switch S2 is in the correct 2 dark position e check if sensitivity pot P1 is adjusted properly e check if span pot P2 is adjusted properly Break detector misses a sheet break e check that the sensor eyes are clean e check the relay alarm levels A1 and A2 e check that the signal level was correct during break e check that the PLC or DCS logic is correct e check air pressure adjust between 7 10 psi Devices connected to relays fail to work properly e check test relay for proper operation e check that the alarm relays are adjusted properly e adjust the alarm trigger level You cannot adjust the Zero or Span e check that the power to IR amplifier is required 24 VDC The display is blank e check power connection to display unit e the fuse on the display unit e replace the display unit January 2005 W41100001 V4 2 Page 19 of 21 N 11 Sensor head service Fiber Optic lenses should be clean all the time Cleaning should primar
14. eel enclosure keeps positive pressure around the sensor head s eyes and keeps the eyelets free of dust or debris The openings should be located perpendicular to the surface being monitored a s T L n T 4 4 vy Purge air out Purge air input Figure 5 Purge air operation 4 Technical data Sensor Ambient temperature 10 177 C 15 350 F Sensor head 25 4 mm 1 SS tubing 305 mm 12 long Extension tube 25 4 mm 1 SS tubing 1500 mm 59 long Fiber optic cable options 3 m 10 6 m 20 or 9 m 30 Weight approximately 0 9 kg 2 Ibs Installation Distance of from the web 5 30 cm 2 10 IR amplifier WE 3 6 9 series Frequency 4 kHz Power consumption 70 mA 24VDC powered from Display Unit Ambient temperature 10 70 C 15 160 F Enclosure classification IP 66 Nema 4X Dimensions 305 x 50 8 x 76 2 mm 12 x 2 x 3 January 2005 W41100001 V4 2 Page 5 of 21 N Connection 31 75 mm 1 1 4 NPT Display unit WE 3 6 9 series Power supply 85 240 VAC 50 60 Hz Output 4 20 mA isolated 2 on off dry contact relays 230V 2A max Max distance from IR amplifier 300 m 1000 Weight 3 6 kg 8 Ibs Dimensions L x H x D 152 x 115 x 145 mm 6 x 4 5 x 5 7 Control box WE 3 6 9 LT series Power supply 85 240 VAC 50 60 Hz or 12 32 VDC option Output 4 20 mA isolated 2 on off
15. et eenteea ea eaea ines 15 7 4 Alarm trigger level Setting cc cececeeee eee ee eee eee eee rere ee een ea ea ea eaeeeeeeeeeeaes 15 7 5 Analog output scaling setting offset value eccceeeeeeceeeeeeeeeseeeeeteeeeeeeeees 15 HO CASO E tees sa adeeuuran ie N san ent aie atea feds tata ae A 16 WAL ECASC Pate Gate ea des sce h ce ae teas epcas tide S EA A E E T 16 iO GASC Si E E E en geee ed eee de ese Dota ted Dated 17 8 To set password and protect settingS cccceeeecee cece eee eee ee eee tees eaeeeeeeeeeeaens 18 9 Operating and setting instructions for the IR amplifier ccceeeeeeeeeeeeeeee ee ees 18 10 WebEye trouble shooting QUuide ccceceee cece eee eter eee et ee ee ee eea ea ea ea eaeeeees 19 11 Sensor head SCMVICE jis s eadionrhagiesseacs served ipeeiaed sear TE TIA ARATAT elena 20 TZ Spare PAM nesar ecteGuacasna punasttabet dana ot a A EEE E T AREN 21 January 2005 W41100001 V4 2 Page 2 of 21 N 1 Description The WebEye fiber optic web break detection system operates on a proven non contact reflection principle An optical sensor is placed above or under the web to be monitored Typical applications include paper and board webs and felts The IR amplifier sends a special light signal to the surface to be monitored The reflected light is picked up by fiber optic cable and transmitted to the IR amplifier This signal is then converted to 4 20 mA signal or on of
16. f information The sensor is not affected by dirt dust steam or high temperature because of self cleaning sensor head construction WebEye is Kajaani Process Measurements solution to high temperature sheet break applications The optical sensor is connected through a fiber optic cable to an IR amplifier While the sensor head is exposed to high temperatures the IR amplifier is mounted 3 m 10 6 m 20 or 9 m 30 away in a less hostile environment For added flexibility the digital display unit of WE 3 6 9 series can be installed up to 300 m 1000 away from the IR amplifier housing Sensor Extension Mounting Flexible Head Ne Tube 4 Clamps Conduit A i Display 1 NPT IR Amplifier Coy Unit 4 20 mA vy gt Ma gt 2 x Relay 240 VAC 2A lt 85 240 VAC 1 Air inlet 1 4 Rigid Conduit Sensor head and extension tube are mounted on the paper machine s frame or other solid structure by mounting clamps 2 Flexible conduit protects fibre optic cable between the extension tube and the IR amplifier housing Connections 1 NPT male to the extension tube and 1 to the IR amplifier Available for 10 20 or 30 long optical cable 3 IR amplifier housing Access point for technician to make necessary adjustments and connections 1 NPT female connections for the conduits 1 NPT optional for rigid conduit 4 Rigid protection conduit for the wires between IR amp
17. ge is 10 20 cm 4 8 side of the machine 20 30 cm 8 12 M i Paper web a im z 25 cm 10 10 20 cm 4 lt gt 4 4 8 X e e S Wire if present Figure 7 Typical installation The following steps describe a typical installation Install the mounting clamps or the rack optional on paper machine s frame or other solid mounting structure Leave 20 30 cm 8 12 between the clamps Mounting technique is optional The suggested method for mounting is to fix the clamp to paper machine or a solid steel plate and attach it to paper machine It is recommended to leave option to adjust clamp height so that sensor head can be positioned optimally during start up Front view Side view 50 8 3 2 oo a vn HL mis Figure 8a Mounting clamp Figure 8b Mounting rack option Feed the free end of the fiber optic cable through the extension tube screw the extension tube and sensor head together and slide the sensor and extension tube assembly through the mounting clamps Rotate the eyes into a position perpendicular to the web and semi tighten the clamps The sensor should be rotated until the signal received by the IR amplifier is at it s strongest possible this is usually the perpendicular position Insert the pin in the position memory ring Figure 9 into the hole in the clamp an
18. ily to be done through the fiber optics opening in the sensor head In case cleaning requires disassembly of the sensor head proceed as follows Remove the end plate by removing the two fastening screws Remove the locking ring Pull the fiber optic cable through the optical sensor housing Clean lenses and reinstall Eyes should be centered over the holes in the pipe ak WON gt Figure 22 Dismantling the sensor housing Fiber optic cable heads Figure 23 Fiber optic cable head January 2005 W41100001 V4 2 Page 20 of 21 N 12 Spare parts 1 End cap H41110043V1 0 2 Screw 2 pcs 2000051 3 Lock ring 2000061 4 Sensor head H31110006V1 1 5 Extension tube H31110007V1 0 6 Mounting clamp 2 pcs H41110024V1 1 and H41110033V1 0 7 Fiber optic cable 3 m 99 0066 8 Fiber optic cable 6 m 99 0068 9 Fiber optic cable 9 m 99 0070 10 Conduit body H31110049V1 0 11 IR amplifier 99 0026 12 Display Nokeval 2021 3200001 13 Hoffman box H31110050V1 0 4 5 78X9 x gt pd fo fo lt ____ 12X3 y x l 11 10 12 A 13 ax Figure 24 WebEye spare parts January 2005 W41100001 V4 2 Page 21 of 21
19. l Block IR Amplifier Fiber 85 240 mA Alarm optical VAC Output 1 amp 2 Cable Figure 16 WE 3 6 9 LT wiring diagram January 2005 W41100001 V4 2 Page 12 of 21 N 7 Display unit operation and configuration 7 1 Main menu During the normal run the display shows measured reflectance value from the web normally 0 22 status of alarm outputs A1 and A2 light lit when alarm on By pressing key one can display trigger levels of alarm 1 and 2 and read minimum or maximum measurement values since the last reset Alarm trigger level is adjusted with A Y keys when in alarm level display Asterisk is used to return back to previous menu or to reset Min Max memory is convenient to check the process noise for setting the alarm limits The operation flowchart for main menu is ada O Omi mai a2 Cimi m2 Ama CI Cmim Cla C a2 MvO m2 ade0 O Om m2 17 82 12 00 9 00 gt 3 05 gt 19 52 Main Display Alarm 1 level Alarm 2 level Min value memory Max value memory VA AVY AV Bade O Omlme 0am O Ome OaOeod O Mmm Dade O Om v 12 00 9 00 3 05 19 52 Edit Alarm 1 level Edit Alarm 2 level Reset memory Reset memory gt Move between displays To reset memory press for more than 1 second Move cursor while editing VA Eat digits Adjust the display brightness while in main display Flowchart 1 Main menu
20. lifier and the display unit Wires for 24V operation voltage to amplifier and data transfer to display Unit 5 Display unit displays the mA signal from the IR amplifier and converts it to 4 20 mA output signal Requires 85 240 VAC field power Provides one analog output 4 20 mA and two relay outputs 6 IR amplifier housing has air connection for 1 4 tube Figure 1 WE 3 6 9 system components January 2005 W41100001 V4 2 Page 3 of 21 N 2 Z 1 WE 3 6 9 LT Sensor 2 Flexible Conduit 3 Rigid Conduit 4 Flexible Conduit 5 Control Box Figure 2 WE 3 6 9 LT components and typical installation 2 Self cleaning sensor head Sensor head is kept clean by purging instrument air through the sensor housing Flowing air keeps the optic lenses clean and avoid dirt or steam to contaminate on the active optic surfaces Purging air helps also keeping sensor head temperature lower in high temperature applications The WebEye requires positive clean instrument air at 0 46 0 67 bar 7 10 psi to cool down sensor head and keep the lenses clean Air inlet is located in the IR amplifier housing in case of WE 3 6 9 series and in the control box of WE 3 6 9 LT The rotameter can be used for easy detection of airflow Sensor head Extension tube Flexible conduit Sleeve joint K K x lt _ lt lt _ i sl es gt Rubber boot gt J 4 P A 1234
21. tivated when below trigger point A2 alarms for service if signal from sensor drifts below e g 14 00 mA with paper on This could happen for example when piece of paper gets stuck with sensor head or sensor eye holes get dirty 7 7 Case 2 The sensor monitoring breaks with wire or felt behind the sheet Sensor head is adjusted so that the IR amplifier signal is e g 15 0 mA with web on and 7 0 mA against wire or felt Respective output current levels to DCS are 15 mA and 9 mA January 2005 W41100001 V4 2 Page 16 of 21 Break Detector b b Figure 19 Felt wire under the sheet Alarm limits can be set as follows A1 alarms for break Trigger level e g 11 mA and activated when below trigger point A2 alarms for service if signal from sensor drifts below e g 12 mA with paper on 7 8 Case 3 The sensor monitors surface of a cylinder In case of a break the paper may get wrapped around the cylinder Sensor head is adjusted so that the IR beam reflects from cylinder surface in mirror like manner No backscattering will happen and signal IR amplifier is zero If paper gets wrapped around the cylinder it will cause backscattering of light and amplifier signal is e g 12 0 mA Figure 20 Detecting paper wrapping around a cylinder Like in case 1 WebEye mA output to DCS can be elevated by scaling output to 1 22 mA Output current to DCS would range from 4 to 52 Alarm limits can be set as follows
22. uit 4 Control box Flexible conduit length WE OLT 7045 mm 277 WE 6LT 4045 mm 159 WE 3LT 1045 mm 41 Figure 12 WE 3 6 9 LT installation full flexible conduit 5 5 Installation of the fiber optical cable for WE 3 6 9 LT In case of full flexible conduit feed the fiber optic cable through the conduit before routing and mounting the conduit The bends on the conduit make it difficult to get the cable through In case of short flexible conduit feed the cable through the first section of the flexible conduit 2 figure 13 Connect the installation adapter 9 to the fiber optic cable and connect a pulling wire to the adapter Carefully and slowly feed the cable through the rigid conduit with one person feeding the cable and another person pulling the cable Fasten the first pipe connector 3 to the rigid conduit 5 The second pipe connector 7 should not be connected to the control box before the fiber optic cable has been drawn completely through the conduit Carefully and slowly pull the head of the fiber optic cable and the second pipe connector through the hole in the control box connect them and then tighten the installation nuts Fasten the fiber optic cable with the connector to the Infra red amplifier 8 January 2005 W41100001 V4 2 Page 9 of 21 wm i Fa u 2 ug aa IS KZS lt i 2 V 2 3 Sy edl aL IQ Note Do not force the cable through the conduit 1 WE1
23. y unit ji A Ramplifier T Temperature lt 70 C 160 Figure 10 Typical WE 3 6 9 installation 5 4 Installation of the rigid conduit WE 3 6 9 LT Install the optical sensor head 1 and the extension 2 as per section 5 2 Attach one of the two flexible conduits 3 between the end of the extension tube 2 and the beginning of the rigid conduit 4 the second flexible conduit is attached at the end of the rigid conduit and at the opening to the control box 5 Rigid conduit 4 recommended diameter 1 inch minimum i d 0 85 inches is installed to protect the fiber optic cable for the remaining length of cable run Bends in the rigid conduit should have a radius no smaller than 5 inches All rigid conduit connections should be sealed to maintain a positive internal pressure WE 9 LT rigid conduit length is 5705 mm WE 6 LT rigid conduit length is 2705 mm WE 9 6 3 LT is also available with full flexible conduit figure 12 January 2005 W41100001 V4 2 Page 8 of 21 Short flexible conduit 1 Sensor head 2 Extension tube 4 NPT 3 Flexible conduit Male 4 Rigid conduit 5 Control box Rigid conduit length WE 9OLT 5705 mm 225 4 NPT WE 6LT 2705 mm 106 Figure 11 WE 3 6 9 LT installation short flexible conduit 305 mm 1480 mm Full flexible conduit 1 Sensor head 2 Extension tube ws NPT 3 Flexible cond
24. y open Exit from configuration mode and Accept changes Ai CA2 FM C12 ll Conf SAVE gt AV Ai CA2 Fi C12 ll Conf UNDO gt Flowchart 2b Setting the basic parameters of display unit Exit from configuration mode and Cancel changes 7 3 Sensor position tuning Adjust the sensor head position to get low IR amplifier reading when web is off open draw break no web on cylinder conditions Try to get value as low as possible e g 0 to 5 mA Tune high reading when web is on by adjusting sensor position height and angle of beam Try to get value as high as possible e g 15 20 mA If value is too high or too small tune sensitivity pot in IR amplifier see figure 15 Write down the low and high readings 7 4 Alarm trigger level setting Set break alarm A1 trigger level to the midpoint between the signal levels obtained in 7 3 A2 can be used for service alarm see case 1 Press gt display shows the break alarm A1 trigger level for example 12 Press A or to adjust the number Press key to accept and to move to alarm A2 Adjust service alarm A2 trigger level by A or Y button for example 14 Press key to accept Move with key to main display 7 5 Analog output scaling setting offset value Analog output is scaled to have 4 mA when signal from IR amplifier is 0 and 20 mA when IR amplifier signal is 22 mA If mA from the IR amplifier were 0 or close to 0 mA the DCS would read 0 Signal would be dr
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