Bedienungsanleitung, Manuel, Operators manual optris CTratio
Contents
1. Signal graph with P 401 33 6 i 38 6 37 6 36 61 35 67 34 6 32 67 31st j 1 45 d Ys LE aa Mee um nn east d 28 67 De ee a 26 6 25 61 236 i i 4 i j i i i 000 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 16 00 1700 1800 TProcess with Peak Hold Hold time 1s TActual without post processing optris CTratio E2013 04 A 30 U C M 01 B 115k Setup ofthe Temperature unit C or F Setup of the Multidrop address In a RS485 network each sensor will need a specific address This menu item will only be shown if a RS485 interface board is plugged in Setup ofthe Baud rate for digital data transfer optris CTratio E2013 04 A 31 Software CompactConnect Installation Min system requirements Insert the installation CD into the according drive on Windows XP Vista 7 your computer If the autorun option is activated the El L Hard disc with at least 30 MByte free space At least 128 MByte RAM CD ROM drive installation wizard will start automatically Otherwise please start CDsetup exe from the CD ROM Follow the instructions of the wizard until the installation is finished The installation wizard will place a launch icon on the desktop and in the start menu Start Programs CompactConnect If you want to uninstall the software from your system2. 1 0 15 0 05 0 15 Platinum black 085 99 99 polished plate 0 1 0 1 rustless 0 15 0 8 heavy plate 0 5 0 7 cold rolled 0 8 0 9 oxidized 0 7 0 9 Titanium polished 0 5 0 75 0 3 0 5 0 1 0 3 0 05 0 2 Zinc polished 0 5 0 05 0 03 0 02 oxidized 0 6 0 15 0 1 0 1 optris CTratio E2013 04 A 43 Appendix B Emissivity Table Non Metals typical Emissivity Spectral response Asbestos Asphalt asalt Carbon non oxidized graphite 0 8 0 9 0 8 0 9 Carborundum Ceramic Concrete Glass 0 8 0 95 0 8 0 95 0 98 0 4 0 9 0 9 0 95 0 4 0 97 0 8 0 95 e 0 98 99955 0 95 0 95 oO e oa o N Gypsum imestone aint non alkaline aper any color lastic gt 50 um non transparent Rubber now extiles Water Wood natural 95088 0 93 0 9 0 95 0 9 0 95 o 3 lelslg 2 a a eo eo Oo Gypsum Rubber EIS Wood natural 1 optris CTratio E2013 04 A 44 Appendix C Smart Averaging The average function is generally used to smoothen the output signal With the adjustable parameter time this function can be optimal adjusted to the respective application One disadvantage of the average function is that fast temperature peaks which are caused by dynamic events are subjected to the same averaging time Therefore those peaks can only be seen with a delay on the signal output The function Smart Averaging eliminates this disadvantage by passing those fast events without avera
3. On Off via programming keys or software selectable 0 4 20 mA 0 5 10 V 2 programmable in outputs usable as Alarm output open collector output 24 V 1 A Digital input for triggered signal output and peak hold function max loop resistance 500 O at 8 36 VDC min 100 KO load impedance USB optional for programming only 2 x 60 VDC 42 VACnws 0 4 A optically isolated optional plug in module optris CTratio E2013 04 A Measurement Specifications Temperature range scalable Spectral range Optical resolution System accuracy Repeatability Temperature resolution gt 900 C Response time 95 signal Emissivity Slope Signal processing at ambient temperature 2345 C 2 g 1 Response time 1s with dynamic adaptation at low signal levels 700 1800 C 0 7 1 1 um 40 1 SF optics 40 1 CF2 optics 0 5 96 of reading 1 C 0 1 96 of reading 1 C 0 1K 5 ms 10 s 0 050 1 000 adjustable via programming keys or analog input 0 800 1 200 adjustable via programming keys or analog input One color Two color mode Attenuation monitoring Alarm Average Peak hold Valley hold Advanced peak hold with threshold and hysteresis adjustable via programming keys or software optris CTratio E2013 04 A Optics The CTratio is available in two focus versions SF optics 41 mm 1524 mm D S 40 1 CF2 optics 7 7 mm 305 mm D S 40 1 The following opt
4. the strands out Extract about 4 mm of the wire isolation and tin the wire ends Place the pressing screw the rubber washer and the metal washers of the cable gland one after the other onto the prepared cable end Spread the strands and fix the shield between two of the metal washers Insert the cable into the cable gland until the limit stop Screw the cap tight Every single wire may be connected to the according screw clamps according to their colors pressing screw metal washer i rubber washer 034J PQKE 0JKH Use shielded cables only The sensor shield shield has to be grounded optris CTratio E2013 04 A Ground Connection On the mainboard PCB you will find a black wire which is connecting factory default the ground connections GND power supply outputs with the ground of the electronics housing To avoid ground loops and related signal interferences in industrial environments it might be necessary to interrupt this connection optris CTratio E2013 04 A 20 Outputs and Inputs The CTratio has an analog output and two digital I O pins programmable as in or output Analog Output The selection of the signal on output channel 1 can be done via the programming keys gt Operating The following output signals can be selected 0 5 V CAUTION Please do never connect a supply voltage to the 0 10 V analog outputs as this will destroy the output 0 20 mA The CTratio is not a 2 wir
5. 0 8V optris CTratio E2013 04 A 22 Programming Interface CTratio sensors can be optionally equipped with an USB interface for programming of the sensor If you want to install the interface plug the interface board into the place provided which is located beside the display In the correct position the holes of the interface match with the thread holes of the electronic box Now press the board down to connect it and use both M3x5 screws for fixing it Plug the preassembled interface cable with the terminal block into the male connector of the interface board If the USB interface is used the sensor is powered by the computer If you use the laser and or display backlight we recommend an additional power supply The usage of the USB interface is only recommended for programming purposes of the sensor A continuous operation with interface is not permitted Please pay attention to the notes in the according interface manuals optris CTratio E2013 04 A 23 Relay Outputs The CTratio can be optionally equipped with a relay output The relay board will be installed the same way as the programming interface A simultaneous installation of the programming interface and the relay outputs is not possible The relay board provides two fully isolated switches which have the capability to switch max 60 VDC 42 VACpms 0 4 A DC AC A red LED shows the closed switch The switching thresholds are in accordance with the values
6. adaptation at Averaging AVG inactive high signal edges activation via Smart Averaging inactive software only Peak hold inactive gt Appendix C Valley hold inactive Output channel 1 T 2C 2C temperature Lower limit temperature range C 700 Upper limit temperature range C 1800 Lower limit signal output OV Upper limit signal output 5V Max attenuation 95 Temperature unit C Baud rate kBaud 115 optris CTratio E2013 04 A Technical Data General Specifications Environmental rating Ambient Temperature Storage temperature Relative humidity Material Dimensions Weight Fiber optics Fiber optics length Vibration Shock Software Sensing head Electronic box IP65 NEMA 4 IP65 NEMA 4 20 250 C 0 85 C 70 C with Laser ON 40 250 C 40 85 C 10 95 non condensing 10 95 non condensing stainless steel die casting zinc length 78 1 mm SF head 89 mm x 70 mm x 30 mm 82 6 mm CF head thread M18x1 375 g incl fiber optics 3 m 420g multimode fiber stainless steel armour 3 m standard 6 m 10 m 15 m 22m IEC 68 2 6 3G 11 200Hz any axis IEC 68 2 27 50G 11ms any axis CompactConnect optional for programming only optris CTratio E2013 04 A Electrical Specifications Power Supply Current draw Aiming laser Outputs analog Digital I O pins Output impedances mA mV Digital interface Relay outputs 8 36 VDC max 200 mA 650 nm 1mW
7. ault value for the slope is 1 000 The following slopes are typical reference values The real slope can vary depending on the metal alloy and surface finish Cobalt Iron Nickel Stainless steel Steel oxidized surfaces Slope 1 000 Cobalt Iron solid molten Molybdenum unoxidized surfaces Slope 1 060 Nickel Platinum Rhodium Stainless steel Steel Tantalum Tungsten Wolfram Determination of unknown Slope values Basically you can use the same methods to determine an unknown slope as described under gt Determination of unknown Emissivities As the CTratio is dedicated for high temperature applications only the first method may be practically applicable use of a t c or other contact probe Attenuation The CTratio is able to measure the temperature of targets smaller than the field of view FOV If the target size is smaller than the FOV and thus attenuating the signal this may cause a small inaccuracy of the reading The inaccuracy is dependent on the object temperature and value of attenuation The higher the object temperature and attenuation the higher the inaccuracy of the sensor optris CTratio E2013 04 A 40 1000 100 900 Object temperature in C eo S 800 Attenuation in This figure is showing the typical temperature reading of a ratio thermometer optris CT ratio in both the 1 color and the 2 color mode in addiction of increasing contamination of the op
8. e sensor 4 20 mA The following signal sources can be selected for output channel 1 T 2C 2C temperature T 1C 1C temperature Attenuation Signal attenuation in 96 optris CTratio E2013 04 A 21 I O pins The CTratio has two digital pins which can be programmed as outputs digital or as inputs digital or analog using the CompactConnect software The following functions are available Function I O pin acts as Description Digital Alarm output digital Open collector output definition as HIGH or LOW alarm via norm open norm close options in software dialog Valid LO input digital The output follows the object temperature as long as there is a Low level at the I O pin After discontinuation of the Low level the last value will be held Valid HI input digital The output follows the object temperature as long as there is a High level at the I O pin After discontinuation of the High level the last value will be held Hold _ input digital The last value will be held if there is a signal with a rising edge on the I O pin Hold input digital The last value will be held if there is a signal with a falling a edge on the I O pin Slope external input analog The slope value can be adjusted via a 0 10 V signal on the I O pin scaling possible via software Emiss external input analog The emissivity value can be adjusted via a 0 10 V signal on the I O pin scaling possible via software High level 20 8V Low level lt
9. eded amount of air approx 2 10 I min depends on the application and the installation conditions on site optris CTratio E2013 04 A 15 Rail Mount Adapter for Electronic box With the rail mount adapter the CTratio electronics can be mounted easily on a DIN rail TS35 according EN50022 62 74 35mm rail ACCTRAIL optris CTratio E2013 04 A Laser Sighting The integrated laser sighting supports the alignment and focusing of the optics The size of the laser dot is equal to the real measurement spot size at any distance If the laser is activated the temperature measurement is not possible The laser can be activated deactivated via the programming keys on the unit or via the software If the laser is activated a yellow LED will shine beside temperature display gt Electrical Installation Operating At ambient temperatures gt 70 C on the electronic box the laser will switch off automatically WARNING Do not point the laser directly at the eyes of persons or animals Do not stare into the laser beam Avoid indirect exposure via reflective surfaces WARNING Inside the electronic box a HIGH POWER LASER is located The laser light is coupled into the fiber optics On the outlet at the optical head the laser power is 1mW and fulfils laser class 2 according IEC 60825 1 2007 Before you open the box remove the fiber optical cable from the electronics or di
10. f the emissivities of both of the overlapping wavelengths and therewith the deciding parameter for measurements in 2 color mode gt Characteristic Slope Values Setup of Emissivity The emissivity is a material constant factor to describe the ability of the body to emit infrared energy The emissivity only affects measurements in the 1 color mode gt Emissivity Setup of the allowed Attenuation The temperature measurement will stop if the attenuation exceeds this limit gt Attenuation Setup of the Main display on the electronic box By pressing Up or Down you can select if the 2C temperature 1C temperature or attenuation should be displayed independent from the selected output signal Setup of Average time If the value is set to 0 0 the display will show function deactivated In this mode an arithmetic algorithm will be performed to smoothen the signal The set time is the time constant This function can be combined with all other post processing functions optris CTratio E2013 04 A P V u 700 0 n 1800 0 00 5 00 Setup of Peak hold If the value is set to 0 0 the display will show function deactivated In this mode the sensor is waiting for descending signals If the signal descends the algorithm maintains the previous signal peak for the specified time After the hold time the signa
11. for the visual alarms LCD backlight To set the alarm values the digital programming interface USB and the software is needed optris CTratio E2013 04 A 24 Alarms The CTratio has the following Alarm features All alarms have a fixed hysteresis of 2 K Visual Alarms These alarms will cause a change of the color of the LCD display and will also change the status of the optional relays interface Digital Alarm 1 and 2 Both of the I O pins can be programmed as alarm output In this case the pin acts as an open collector output 24 V 1A The following signal sources can be selected T 2C T 1C Attenuation TBox TProcess Temperature signal which has been selected for the analog output For a setup of the alarm values selection of the signal sources and definition as high or low alarm via change of normally open closed the programming interface USB including the software is needed 24 VI 1A 7 E 10 kOhm VO 1 2 Voltage output CTratio Different wirings of the open collector output optris CTratio E2013 04 A 25 Operating After power up the unit the sensor starts an initializing routine for some seconds During this time the display will show INIT After this procedure the object temperature is shown in the display The display backlight color changes according to the alarm settings gt Alarms Visual Alarms Sensor Setup The programmin
12. g keys Mode Up and Down enable the user to set the sensor on site The current measuring value or the chosen feature is displayed With Mode the operator obtains the chosen feature with Up and Down the functional parameters can be selected a change of parameters will have immediate effect If no key is pressed for more than 10 seconds the display automatically shows the calculated object temperature according to the signal processing RN press at first the Mode Up Down optris CTratio E2013 04 A 26 Down Factory Default Setting o v To set the CTratio back to the factory default settings please key and then the both pressed for approx 3 seconds The display will show RESET for confirmation Display Pressing the Mode button again recalls the last called function on the display The signal processing features Peak hold and Valley hold cannot be selected simultaneously Mode key and keep Display Mode Sampi TAdjustmentRange SCS s ON LeserSih ngion Joor SSCS 600 0 i 65 0 23 3 CB Boxtemperature 2330 m MV5 Signal output channel 1 0 5 V 0 20 0 20 mA O 4 20 4 20 mA O MV5 0 5 V MV10 0 10 V R 1 000 D 95 0 Vecstemet ongSUW 500 990 Main display on electronic box 2C tempe
13. g window gt The Ratio Principle Please note that the sensor accuracy is not guaranteed for signal reductions of more than 95 optris CTratio E2013 04 A 12 Mechanical Installation The CTratio sensing heads are equipped with a metrical M18x1 thread and can be installed either directly via the sensor thread or with help of the hex nuts 2 pieces included in scope of supply to the mounting bracket available Various mounting brackets which make the adjustment of the sensing head easier can be additionally ordered as accessories 78 1 SF head 81 6 CF head Sensing head Please make sure that the minimum bending radius of the fiber optics of 40 mm will be considered during installation optris CTratio E2013 04 A Electronic box The electronic box is also available with closed cover display and programming keys with no access from outside ACCTCOV optris CTratio E2013 04 A 14 Accessories 30 ca 30 SW7 M5 connector for hose 193 AG 5 So Mounting bracket adjustable in Air purge collar ACCTAPMH one axis ACCTFBMH The lens must be kept clean at all times from dust smoke fumes and other contaminants in order to avoid reading errors in the 1 color mode These effects can be reduced by using an air purge collar Make sure to use oil free technically clean air only The ne
14. ging directly through to the signal output EE i E i i i i i i i i i i i EE i h i i j 3440 3340 444 4340 SA 5340 A4 GE 740 BAAN sio 3 2300 3300 4300 5 300 6 300 7 300 8 300 3300 10300 nj Signal graph with Smart Averaging function Signal graph without Smart Averaging function optris CTratio E2013 04 A 45
15. ical charts show the diameter of the measuring spot in dependence on the distance between measuring object and sensing head The spot size refers to 95 96 of the radiation energy The distance is always measured from the front edge of the sensing head LOTU spot size mm 6 6 10 6 21 1 31 3 41 4 62 6 73 3 distance mm 102 305 762 1143 1524 1905 2286 2667 3048 SF optics optris CTratio E2013 04 A ah spot size mm 51 64 77 23 6 50 1 77 6 104 1 distance mm 102 200 305 762 1524 2286 3048 CF2 optics distance distance from front edge of the sensing head to the measurement object The D S ratio is valid for the focus point optris CTratio E2013 04 A Sensor placement 1C mode The size of the measuring object and the optical resolution of the infrared thermometer determine the maximum distance between sensing head and measuring object In order to prevent measuring errors the object should fill out the field of view of the optics completely Consequently the spot should at all times have atleast the same size like the object or should be smaller than that Sensor placement 2C mode In the 2 color mode the sensing head can be placed under various conditions like Measurement through holes smaller than the spot size Measurement through dust smoke or steam in the atmosphere Measurement of objects smaller than the measurement spot Measurement through a dirty lens or dirty sightin
16. l will drop down to the second highest value or will descend by 1 8 of the difference between the previous peak and the minimum value during the hold time This value will be held again for the specified time After this the signal will drop down with slow time constant and will follow the current object temperature Setup of Valley hold If the value is set to 0 0 the display will show function deactivated In this mode the sensor waits for ascending signals The definition of the algorithm is according to the peak hold algorithm inverted Setup of the Lower limit of temperature range The minimum difference between lower and upper limit is 20 K If you set the lower limit to a value 2 upper limit the upper limit will be adjusted to lower limit 20 K automatically Setup of the Upper limit of the temperature range The minimum difference between upper and lower limit is 20 K The upper limit can only be set to a value lower limit 20 K Setup of the Lower limit of the signal output This setting allows an assignment of a certain signal output level to the lower limit of the temperature range The adjustment range corresponds to the selected output mode e g 0 5 V Setup of the Upper limit of the signal output This setting allows an assignment of a certain signal output level to the upper limit of the temperature range The adjustment range corresponds to the selected output mode e g 0 5 V optris CTratio E2013 04 A
17. mode gt Basics of Infrared Thermometry The optical sensing head of the CTratio is made of stainless steel IP65 NEMA 4 rating and is connected via a rugged fiber optics which is protected by a stainless steel armour with the sensor electronics die casting zinc box 1 color mode 1C The 1 color mode is best for measuring the temperature of objects in areas where no sighting obstructions solid gases or dust exist The measurement object must fill completely the measurement spot if the 1 color mode is used 2 color mode 2C In this mode the object temperature will be determined from the ratio of the signal of two separate and overlapping infrared bands The 2 color mode is best for measuring the temperature of objects which are partially obscured by other objects openings or viewing windows that reduce energy and by dirt smoke or steam in the atmosphere Another benefit of the 2 color mode is that the measurement object can be smaller than the measurement spot provided the background is cooler than the target gt The Ratio Principle optris CTratio E2013 04 A The CTratio sensing head is a sensitive optical system Please use only the thread for mechanical installation Avoid mechanical violence on the head this may destroy the system expiry of warranty Scope of Supply CTratio sensing head with fibre connection cable and electronic box 2 mounting nuts Mounting bracket adjustable in one axis Ope
18. nto the measuring object which covers it completely Now set the emissivity to 0 95 and take the temperature of the sticker Afterwards determine the temperature of the adjacent area on the measuring object and adjust the emissivity according to the value of the temperature of the sticker optris CTratio E2013 04 A 38 gt Cove a part of the surface of the measuring object with a black flat paint with an emissivity of 0 98 Adjust the emissivity of your infrared thermometer to 0 98 and take the temperature of the colored surface Afterwards determine the temperature of a directly adjacent area and modify the emissivity until the measured value corresponds to the temperature of the colored surface CAUTION On all three methods the object temperature must be different from ambient temperature Characteristic Emissivities In case none of the methods mentioned above help to determine the emissivity you may use the emissivity tables gt Appendix A and B These are average values only The actual emissivity of a material depends on the following factors temperature measuring angle geometry of the surface thickness of the material constitution of the surface polished oxidized rough sandblast spectral range of the measurement transmissivity e g with thin films optris CTratio E2013 04 A 39 Characteristic Slope Values The slope is the quotient of the emissivities of both of the overlapping wavelength bands The factory def
19. of the product instead of repairing it If the failure results from misuse or neglect the user has to pay for the repair In that case you may ask for a cost estimate beforehand optris CTratio E2013 04 A Content Page Page Description 3 Operating 26 Scope of Supply 4 Sensor Setup 26 Maintenance 4 Software CompactConnect 32 Safety Note 5 Installation 32 Cautions 5 Communication Settings 33 Factory Default Settings 6 Basics of Infrared Thermometry 34 Technical Data 7 The Ratio Principle 35 General Specifications 7 Emissivity 38 Electrical Specifications 8 Definition 38 Measurement Specifications 9 Determination of unknown Emissivities 38 Optics 10 Characteristic Emissivities 39 Mechanical Installation 13 Characteristic Slope Values 40 Accessories 15 Determination of unknown Slope values 40 Laser Sighting 17 Attenuation 40 Electrical Installation 18 Appendix A Emissivity Table Metals 42 Cable Connections 18 Appendix B Emissivity Table Non Metals 44 Ground Connection 20 Appendix C Smart Averaging 45 Outputs and Inputs 21 Analog Output 21 Digital I O pins 22 Programming Interface 23 Relay Outputs 24 Alarms 25 optris CTratio E2013 04 A Description The sensors of the optris CTratio series are noncontact infrared temperature sensors They calculate the surface temperature based on the emitted infrared energy of objects The CTratio can work in the 1 color mode as well as in the ratio or 2 color
20. optris CTratio Fiber Optics Ratio Thermometer Operators manual 4optris _ Messtechnik Schaffhausen GmbH M hlenstrasse 4 CH 8260 Stein am Rhein Telefon 41 52 672 50 00 Telefax 41 52 672 50 01 www mts ch e mail infogmts ch Messen Pr fen Automatisieren www mts ch CE Conformity The product complies with the following standards EMC EN 61326 1 2006 Basic requirements EN 61326 2 3 2006 Safety EN 61010 1 2001 Laser Safety EN 60825 1 2007 The product accomplishes the requirements of the EMC Directive 2004 108 EG and of the Low Voltage Directive 2006 95 EG References to other chapters are marked as Warranty Each single product passes through a quality process Nevertheless if failures occur please contact the customer service at once The warranty period covers 24 months starting on the delivery date After the warranty is expired the manufacturer guarantees additional 6 months warranty for all repaired or substituted product components Warranty does not apply to damages which result from misuse or neglect The warranty also expires if you open the product The manufacturer is not liable for consequential damage or in case of a non intended use of the product If a failure occurs during the warranty period the product will be replaced calibrated or repaired without further charges The freight costs will be paid by the sender The manufacturer reserves the right to exchange components
21. or sensor can be mounted farther away even if the target does not fill the resulting spot size The convenience is that you are not forced to install the sensor at some specific distance based upon target size and the sensor s optical resolution Partially Obscured Targets The radiated energy from a target is in most cases equally reduced when objects or atmospheric materials block some portion of the optical field of view It follows that the ratio of the energies is unaffected and thus the measured temperatures remain accurate A 2 color sensor is better than a 1 color sensor in the following conditions Sighting paths are partially blocked either intermittently or permanently Dirt smoke or steam is in the atmosphere between the sensor and target Measurements are made through items or areas that reduce emitted energy such as grills Screens channels or small openings optris CTratio E2013 04 A 35 Measurements are made through a viewing window that has unpredictable and changing infrared transmission due to accumulating dirt and or moisture on the window surface The sensor itself is subject to dirt and or moisture accumulating on the lens surface 1 color sensors see polluted atmosphere and dirty windows and lenses as a reduction in energy and give much lower than actual temperature readings Targets Smaller Than Field of View When a target is not large enough to fill the field of view or if the target is m
22. oving within the field of view radiated energies are equally reduced but the ratio of the energies is unaffected and measured temperatures remain accurate This remains true as long as the background temperature is much lower than the target temperature Example Measuring of wire or rod often too narrow for field of view or moving or vibrating unpredictably It is much easier to obtain accurate results because sighting is less critical with 2 color sensors Low or Changing Emissivities If the emissivities in both wavelengths colors were the same as they would be for any blackbody emissivity 1 0 or greybody emissivity lt 1 0 but constant then their ratio would be 1 and target emissivity would not be an influence However in nature there is no such thing as a greybody The emissivity of all real objects changes with wavelength and temperature at varying degrees depending on the material optris CTratio E2013 04 A 36 When emissivity is uncertain or changing a 2 color sensor can be more accurate than a 1 color instrument as long as the emissivity changes by the same factor in both wavelength bands Note however that accurate measurement results are dependent on the application and the type of material being measured To determine how to use 2 color sensors with your application when uncertain or changing emissivities are a factor please contact your sales representative optris CTratio E2013 04 A 37 Emissivi
23. please use the uninstall icon in the start menu You will find a detailed software manual on the CD re s Main Features Complete sensor setup Adjustment of signal processing functions Programming of outputs and functional inputs optris CTratio E2013 04 A 32 Communication Settings Serial Interface Baud rate 9 6 115 2 kBaud adjustable on the unit or via software Data bits 8 Parity none Stop bits 1 Flow control off Protocol All sensors of the CTratio series are using a binary protocol optris CTratio E2013 04 A 33 Basics of Infrared Thermometry Depending on the temperature each object emits a certain amount of infrared radiation A change in the temperature of the object is accompanied by a change in the intensity of the radiation For the measurement of thermal radiation infrared thermometry uses a wave length ranging between 1 p and 20 um The intensity of the emitted radiation depends on the material This material contingent constant is described with the help of the emissivity which is a known value for most materials see enclosed table emissivity Infrared thermometers are optoelectronic sensors They calculate the surface temperature on the basis of the emitted infrared radiation from an object The most important feature of infrared thermometers is that they enable the user to measure objects contactless Consequently these products help to measure the temperatu
24. rators manual Maintenance Lens cleaning Blow off loose particles using clean compressed air The lens surface can be cleaned with a soft humid tissue moistened with water or a water based glass cleaner PLEASE NOTE Never use cleaning compounds which contain solvents neither for the lens nor for the housing optris CTratio E2013 04 A Safety Note WARNING This sensor contains an internal HIGH POWER LASER which is used for spot size illumination via the fiber optics cable Before you open the electronics remove the fiber optical cable from the electronics or disassemble the optical head the sensor must be switched off and disconnected from the power supply and USB interface The laser power at properly usage of the sensor fiber optical cable incl sensing head connected is 1mW and fulfils laser class 2 according IEC 60825 1 2007 Cautions Avoid static electricity The fiber optical cable has a minimum bending radius of 40 mm In case of problems or questions which may arise when you use the CTratio please contact our service department Read the manual carefully before the initial start up The producer reserves the right to change the herein described specifications in case of technical advance of the product optris CTratio E2013 04 A Factory Default Settings The unit has the following presetting at time of delivery ERE OPIRE temperate He Smart Averaging means a Slope 1 000 dynamic average
25. rature value 2C 2C temperature 1C 1C temperature AT attenuation A 0 2 Signal output Average O2 a inactive 0 1 998 96 P Signal output Peak hold inactive P inactive 0 1 999 9 s P oo oo oo oo infinite V inactive 0 1 999 9 s V oo oo 00 oo infinite 1500 Ubperimittemperatureange iS007C depending on mode EL 0 00 j Lowerlimittsignaloutput OV according to the range of the selected output signal 5 00 Upperlimitsignaloutput b V Jaccording to the range of the selected output signal C IM O1 B 115 Multidrop adress 1 only with RS485 interface Baud rate in kBaud 115 9 6 19 2 38 4 57 6 115 2 kBaud optris CTratio E2013 04 A O MV5 R 1 000 E 0 970 D 95 0 MD 2C A 0 2 28 Activating ON and Deactivating OFF of the integrated Sighting Laser By pressing Up or Down the laser will be switched on or off If the laser is activated a measurement cannot be done Selection of the Output signal By pressing Up or Down the different output signals can be selected gt Outputs and Inputs Setup of Slope Pressing Up increases the value Down decreases the value also valid for all further functions The slope is the quotient o
26. re of inaccessible or moving objects without difficulties Infrared thermometers basically consist of the following components lens spectral filter detector electronics amplifier linearization signal processing The specifications of the lens decisively determine the optical path of the infrared thermometer which is characterized by the ratio Distance to Spot size The spectral filter selects the wavelength range which is relevant for the temperature measurement The detector in cooperation with the processing electronics transforms the emitted infrared radiation into electrical signals optris CTratio E2013 04 A 34 The Ratio Principle The 2 color ratio technology makes possible accurate and repeatable temperature measurements that are free from dependence on absolute radiated energy values In use a 2 color sensor determines temperature from the ratio of the radiated energies in two separate wavelength bands colors The benefits of 2 color sensors are that accurate measurements can be made under the following conditions When the field of view to the target is partially blocked or obscured When the target is smaller than the sensor s field of view When target emissivities are low or changing by the same factor in both wavelength bands Another benefit is that 2 color sensors measure closer to the highest temperature within the measured spot spatial peak picking instead of an average temperature A 2 col
27. sassemble the optical head the sensor must be switched off and disconnected from the power supply and USB interface SAFETY SWITCH If the fiber optical cable will be removed from the electronics the laser will be switched off automatically Any manipulation at this safety switch is prohibited optris CTratio E2013 04 A Electrical Installation Cable Connections For the electrical installation of the CTratio please open at first the cover of the electronic box 4 screws Below the display are the screw terminals for the cable connection Designation 8 36VDC GND GND 02 VO 1 OUT mV mA CAUTION Please do never connect a supply voltage to the analog outputs as this will destroy the output The CTratio is not a 2 wire sensor Power supply Power supply Ground 0V of power supply Ground 0V of in and outputs VO pin 2 digital In Output or analog input VO pin 1 digital In Output or analog input Analog output object temperature mV or mA Opened electronic box with terminal connections Please use a power supply unit with an output voltage of 8 36 VDC which can supply 200 mA The ripple should be max 200 mV optris CTratio E2013 04 A Cable Assembling The cable gland M12x1 5 allows the use of cables with a diameter of 3 to 5 mm Remove the isolation from the cable 40 mm power supply 50 mm signal outputs 60 mm functional inputs Cut the shield down to approximately 5 mm and spread
28. tical transmission path in between the target and the ratio thermometer Due to the ratio principle the 2 channel signal upper curve stays very stable over a wide range of attenuation up to over 90 The signal of the 1 channel mode lower curve acting like in a standard pyrometer with one measuring wavelength only is decreasing rapidly with the contamination of the transmission path optris CTratio E2013 04 A 41 Appendix A Emissivity Table Metals Spectral response 10um 16um 5ium 84d4um non oxidized 0 02 0 2 0 02 0 2 0 02 0 1 polished 0 02 0 1 0 02 0 1 0 02 0 1 roughened 0 2 0 6 0 1 0 4 0 1 0 3 oxidized 0 4 0 2 0 4 0 2 0 4 polished 0 01 0 05 0 01 0 05 0 01 0 05 roughened 0 4 0 3 0 3 oxidized 0 6 0 5 0 5 polished 0 03 roughened 0 05 0 15 oxidized 0 5 0 8 01 0 001 01 001 01 Haynes alloy 0 5 09 0 6 0 9 0 3 0 8 0 3 0 8 electro polished sandblast oxidized non oxidized 1 0 0 05 0 25 0 05 0 2 rusted 6 0 0 5 0 8 0 5 0 7 oxidized 7 0 5 0 0 6 0 9 0 5 0 9 forged blunt 0 9 0 9 molten Iron casted non oxidized 0 35 0 3 0 25 0 2 oxidized 0 9 0 7 0 9 0 65 0 95 0 6 0 95 optris CTratio E2013 04 A 42 Spewalrspose 19gm um sim smm polished 0 35 0 05 0 2 0 05 0 2 0 05 0 1 roughened 0 65 0 6 0 4 0 4 oxidized 0 3 0 7 0 2 0 7 0 2 0 6 1 905015 005915 005015 Molybdenum non oxidized 0 25 0 35 0 1 0 3 0 1 0 15 0 1 Nickel electrolytic 0 2 0 4 0 1 0 3 0
29. ty Definition The intensity of infrared radiation which is emitted by each body depends on the temperature as well as on the radiation features of the surface material of the measuring object The emissivity Epsilon is used as a material constant factor to describe the ability of the body to emit infrared energy It can range between 0 and 100 96 A blackbody is the ideal radiation source with an emissivity of 1 0 whereas a mirror shows an emissivity of 0 1 If the emissivity chosen is too high the infrared thermometer may display a temperature value which is much lower than the real temperature assuming the measuring object is warmer than its surroundings A low emissivity reflective surfaces carries the risk of inaccurate measuring results by interfering infrared radiation emitted by background objects flames heating systems chamottes To minimize measuring errors in such cases the handling should be performed very carefully and the unit should be protected against reflecting radiation sources Determination of unknown Emissivities gt First determine the actual temperature of the measuring object with a thermocouple or contact sensor Second measure the temperature with the infrared thermometer and modify the emissivity until the displayed result corresponds to the actual temperature gt If you monitor temperatures of up to 380 C you may place a special plastic sticker emissivity dots part number ACLSED o
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