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Technical Description

Technical Description

3.1

Instrument features

Detector

Window

Vertical scanner

Horizontal scanner Aspheric

lens

Filter wheel

Chopper

PC/104 Module

LCD display

Fig. 1:

Schematic diagram of camera head

VARIOSCAN

high resolution

is a thermographic system for the

wavelength ranges of 2 – 5 µm (Model 3022) and 8 – 12 µm (Model
3021). Thus the system covers both atmospheric windows.

The camera operates on the principle of object scanning. The object is
scanned through a two-dimensional reflecting scanner.

The horizontal scanner scans in lines, with 360 pixels each being
recorded at a frequency of 135 Hz. This scanner operates as a
resonance oscillator driven by a DC motor.

InfraTec

Содержание VARIOSCAN high resolution 3021

Страница 1: ...VARIOSCAN high resolution Models 3021 3021 ST and 3022 Manual JENOPTIK Group I n f r a T e c ...

Страница 2: ...oduct improvement Copy deadline July 2000 Publication No 667917 005 98 02 0500 en JENOPTIK Laser Optik Systeme GmbH Camera Systems D 07739 Jena Telephone 49 3641 65 3302 Fax 49 3641 65 3494 CE Note No part of this manual may be reproduced in any way printed copied photocopied microfilmed or processed and duplicated by any electronic system or disclosed to third parties without the prior written co...

Страница 3: ...The manufacturer will not accept any liability for damages caused by nonobservance of the information given in this manual I n f r a T e c ...

Страница 4: ...cking the equipment 15 5 Handling the camera 16 6 Installation 17 7 Connection to an external PC 20 8 Operation 21 8 1 Recording mode 21 9 Temperature measurement 50 9 1 General 50 9 2 Measurement principle 51 10 Maintenance 54 10 1 Routine maintenance 54 10 2 Other maintenance work 54 11 Service 56 12 Declaration of EC Conformity 57 I n f r a T e c ...

Страница 5: ...l 3022 thermoelectrically cooled wavelength range 2 5 µm silicon optics The software offered for each model includes a model specific dataset that is specially customised to the camera head This dataset cannot be transferred to any other VARIOSCAN system Main applications are q Building thermography q Leakage detection q Preventive maintenance in industry quality assurance and production inspectio...

Страница 6: ...s of this standard are interpreted in Section 6 of this manual Never cover the safety hole of the Dewar cap lf not in the camera head transport liquid nitrogen only in licensed containers having a stable position on the transport vehicle lf you incline the camera head too much 70 approx nitrogen may leak from the Dewar cap Therefore when the Dewar is fully filled with nitrogen transport the camera...

Страница 7: ... save certain settings Never switch off the camera while this process is going on Only use ATA compatible memory cards on the PCMCIA drive of the VARIOSCAN high resolution Nonobservance may cause damages to camera or memory card for which we will not accept any liability I n f r a T e c ...

Страница 8: ... is a thermographic system for the wavelength ranges of 2 5 µm Model 3022 and 8 12 µm Model 3021 Thus the system covers both atmospheric windows The camera operates on the principle of object scanning The object is scanned through a two dimensional reflecting scanner The horizontal scanner scans in lines with 360 pixels each being recorded at a frequency of 135 Hz This scanner operates as a resona...

Страница 9: ...Between imaging optics and detector a filter wheel is located The wheel contains stops of different diameters that can be rotated into the optical path at higher temperatures The employed object side scanning method allows the use of an electro optical zoom function This is achieved by varying the oscillation amplitudes of the scanner reflectors The maximum zoom possible is 6x On the Model 3021 MC...

Страница 10: ...Technical Description 10 I n f r a T e c ...

Страница 11: ...asuring range 40 1 200 C 40 1 200 C 10 1 200 C Absolute accuracy of temperature measurement factory calibrated at an ambient temperature of 22 2 C and ε 1 2 K measurement up to 100 C otherwise 1 of full scale value each Scanned object field 30 H x 20 V Geometrical resolution mrad K 0 5 1 5 1 5 3 Pixels per line 360 300 Lines per image 240 200 100 50 Image rate s 1 0 4 0 2 depending on number of li...

Страница 12: ...Technical Description 12 I n f r a T e c ...

Страница 13: ... storage Internal flash memory PCMCIA Memory Card Power supply Internal 12 V battery external 12 V supply 230 V power supply unit Power consumption 12 W 16 W 14 W Functions Motorised focus Autofocus 6 zoom stages 3 colour and 2 B W palettes Max 9 isotherms Editable emission value Multispot measurement max 9 Spot size 1 x 1 pixel 99 x 99 pixels Storage transporta tion temperature range 25 C 70 C un...

Страница 14: ...Technical Description 14 Total weight of system in carrying case approx 11 kg I n f r a T e c ...

Страница 15: ...t are part of the standard equipment 1 Camera head 2 Nitrogen fill in funnel on Model 3021 only 3 Power supply unit charger for battery pack 4 Battery pack 10 8V 3 9Ah 5 VARIOSCAN high resolution manual On receipt of the VARIOSCAN high resolution please check its equipment for completeness and perfect condition of its components Inform your supplier immediately of any damages I n f r a T e c ...

Страница 16: ...tisfies the requirements of IP40 Use the instrument accordingly i e protect it against dust and rain The VARIOSCAN high resolution was tested in compliance with the following standards q Climatic test acc to DIN 58390 Part 2 7 q Mechanical dynamic load acc to DIN 58390 Part 3 q Electromagnetic Compatibility EMC acc to EN 50082 2 VDE 0839 Part 82 2 The operating temperature range of the VARIOSCAN h...

Страница 17: ...argeable batteries available as VARIOSCAN high resolution accessories Do not operate the system on a defective or insufficiently charged battery Filling Dewar flask of camera head Model 3021 only Caution When handling liquid nitrogen observe the following safety rules Never store liquid nitrogen in tightly sealed containers Keep it in special containers fitted with a looseiy closing cap to allow a...

Страница 18: ...t of the camera until the lock snaps in q Turn power switch on camera back to I VARIOSCAN 3021 3022 or II VARIOSCAN 3021 ST the indicator LED on the display lights During hardware initialisation the display remains dark This process takes about 15 s Subsequently the software is initialised The display shows a corresponding message q Switch position I on VARIOSCAN 3021 ST means on standby for the i...

Страница 19: ... object used was a person For objects of higher or lower temperature you must change the temperature level Please note that only a few basic settings are necessary to make a thermographic image visible For thermal measurements however additional items must be considered cf Section 9 Temperature measurement Before starting operation in normal mode make sure the following requirements are met 1 Dewa...

Страница 20: ... interface to a PC that can be connected by an Ethernet cable and a PC network card PCMCIA network card to a PC or notebook The Ethernet connection allows complete remote control of VARIOSCAN high resolution and on line image capturing The required PC software is available as an option I n f r a T e c ...

Страница 21: ...rding mode is active Focusing Zoom selection ƒ Brightness adjustment Level Contrast adjustment Range Storage Colour palette Spot temperature measurement ˆ Freeze mode Focusing keys With these keys you can focus the camera on to the object Pressing the keys once increases reduces the focus distance in steps In single step mode consider that every key pressure aborts the running image grabbing proce...

Страница 22: ... the SET key are available After you have entered the distance press the Set key to confirm the input value By double clicking the lower focus key the Autofocus function is initiated once if this function has been activated in the Autofunctions menu see Freeze menu Otherwise same as with the upper key the distance is entered numerically In the Autofocus mode the camera automatically focuses on the...

Страница 23: ...ject field as a function of object distance for zoom step 0 Fig 2 Relationship between FOV and object distance Pressing the key once switches to the next higher zoom step Double clicking this key activates a 5 times magnifier This is a 5x zoom generated by control software Pressing the key activates the next lower zoom step I n f r a T e c ...

Страница 24: ...Operation 24 To switch off the activated magnifier again double click any of the zoom keys I n f r a T e c ...

Страница 25: ...tions menu see Freeze menu Otherwise the level is to be entered numerically Any operation of a Level key deavtivates the permanent Autolevel function possibly selected on the Autofunctions menu The Autolevel function controls the brightness of image presentation as a function of image content without affecting the contrast Range If the Autolevel function is run for a single time it is indicated by...

Страница 26: ... menu The Autoimage function readjusts brightness and contrast of image presentation depending on the image content If the Autoimage function is run for a single time it is indicated by a message box If the Spot function is active the control is based on the image content under Spot 1 otherwise the system analyses the entire image content The function is linked to the Calibration range autofunctio...

Страница 27: ...el full screen mode To exit this mode press any key Freeze Mode ESC A single click on the ESC key activates the Freeze mode Image grabbing is interrupted The display shows the image taken last In the background 9 additional images are present In this mode the keys have the following functions 1 Autofunctions 7 Current background image 2 Gallery 8 Image accumulation 3 Temperature values 9 Previous ...

Страница 28: ...range limits of the next higher lower calibration range by 10 of the span of the next higher lower calibration range the next higher lower range will be set If TMin and TMax have been activated the range will be changed when in the relevant image section the values fall below or exceed the range limits and the neighbouring range to be set covers the found maximum control action through over underr...

Страница 29: ... or in a local spot Max Min display Total image Max Min display Local spot Environmental temperature Sets the chopper temperature measured when exiting the menu as environmental temperature of the measured object Atmospheric temperature Sets the chopper temperature measured when exiting the menu as atmospheric temperature Type 3022 only I n f r a T e c ...

Страница 30: ...ent background image is indicated by a white frame Selection of background images is via the keys The key allows images to be marked unmarked Marked images appear with a yellow frame By a double click all background images are marked A triple click unmarks all background images Temperature values Pressing this key opens the following window The various options of this menu are described below I n ...

Страница 31: ...lter into the optical path This filter has a transmission range of 3 5 µm Use this setting when you work with this camera outdoors in the sunshine Emissivity Entry of the global emissivity value This value is taken into account in temperature calculation The parameter is material specific considering the emissivity of the object Environmental temperature This is the temperature of objects in the a...

Страница 32: ...phy Spot temperature measurement C This key activates deactivates the temperature measurement for defined spots in the image A double click starts the Spot editor In the Spot editor the keys have the following functions Moves the spot up down Moves the spot to the left Moves the spot to the right Confirms spot settings Selection and generation of a measurement spot 9 spots may maximally be defined...

Страница 33: ...eletes the spot that has been defined last Adjustment of the emissivity for the current spot 0 1 ε 1 The default is ε 1 Upper key to increase lower key to reduce the value The emissivity edited for the current spot will not affect the global emissivity selected on the Temperature menu or the image presentation but only the temperature values calculated on the spot A double click on one of the ε ε ...

Страница 34: ...Operation 34 Setup menu SET This menu provides the following setting options The various Setup options are explained in the following sections I n f r a T e c ...

Страница 35: ...t number User defined file name max 8 characters If you activate the Name No option and exit the SID PCX image name menu with ESC an input window will appear In this window edit the variable part of the file name 5 characters If you have selected either Date No or Name No the system then automatically creates a file name without any query Comment In this window enter a comment that shall be stored...

Страница 36: ...guration VARIOSCAN is delivered with a factory set standard configuration regarding distance zoom brightness etc These parameters will be activated when you start up the system The Configuration window allows you to save a user defined configuration using the Save option When you activate this function again the previous configuration will be overwritten The Save As option permits you to save 9 ad...

Страница 37: ...mperature supervision This menu allows you to select the upper and lower limits of the temperature monitoring system as well as the desired action The following actions are available The Alarm action displays the message T overl Key or T underl Key as well as an alarm buzzer Image Format In this menu the 360 x 240 pixel full screen mode can be switched to modes with reduced line number in order to...

Страница 38: ...mage indicates that the difference image mode is active Scanner The option list provides the following modes vOFF middle Vertical scanner off line scan in image centre vOFF position Vertical scanner off position in image selectable vOFF Pos nLines Vertical scanner off position and line number selectable vOFF hOFF nPixel Vertical and horizontal scanner off position selectable pixel frequency betwee...

Страница 39: ...isplay OFF If you use an external monitor in combination with the camera you can use this function to switch off the camera s display Besides you can utilise this option also if you have activated the autosave function and do not need the internal display any longer for operation and visualisation After switch off of the monitor the system switches back to Recording Mode You can deactivate the Dis...

Страница 40: ...sed optics The default is standard The optionally available wide angle lens and the macrolens options are listed only if supplied with the camera Diverting Mirror If the VARIOSCAN deflecting mirror is used this function allows you to produce non reversed images Zoom Editor The Zoom Editor allows you to set the horizontal and vertical field of view FOV independently of each other by entry of zoom s...

Страница 41: ...erature Type 3022 only Page 2 Image field size chopper frequency focus adjustment zoom step Autofunctions window with display of active Autofunctions Page 3 User calibration charging state of JENOPTIK battery no battery in camera not defined date time internal camera temperature Page 4 Free memory image FIFO number of background images number of Cool downs Type 3021 ST only operating hours firmwar...

Страница 42: ...the entry of the current date Time This window allows the entry of the current time Battery In this window select the battery used When selecting an internal or external JENOPTIK battery the status window will display its power in percent for the corresponding battery characteristics I n f r a T e c ...

Страница 43: ... special optional software package RS232 Keyboard Activates remote control of the camera via the serial port RS232 Keyboard Beep By default any user camera interactions key pressures are confirmed by a beep signal to indicate that the camera understood the command This option may be deactivated Any change of this option becomes effective only after camera restart Baud Rate To reduce data transfer ...

Страница 44: ...and internal memory Here the key assignment is as follows File name Gallery Select memory Selected memory Previous Next image Delete image Mark unmark Copy Mark unmark key A single click selects or deselects the current image for copying A double click selects all images A triple click deselects all images Memory selector key Press this key to switch between memory card and internal flash The sele...

Страница 45: ...target medium is Card the COM port option is selectable The copy or send process includes all selected files If you failed to select a file the currently active file will be copied or sent When sending a file the name of which already exists on the target medium the existing file may be overwritten Isotherm On the thermogram isotherms show regions of identical radiation intensity in the same colou...

Страница 46: ...it before the editor switches to the next isotherm When you answer with No the isotherm edited last will be rejected A double click on the bottom key deletes all isotherms Select the colour of the isotherm 9 colours are available Black white and 7 further colours that are not included in the palette for image presentation Change the isotherm width in Kelvin A double click allows numeric entry of i...

Страница 47: ...he isotherm editor without saving any previous changes The system will ask you if the last isotherm created shall be programmed SET This key serves to programme the current isotherm and exit the isotherm editor All previous changes will be saved In Freeze mode created isotherms are switched on off by a single click on the ISO key Current background image Use the key to select the current backgroun...

Страница 48: ...s all following or all previous images of a series Save Image Images may be saved to internal and external storage media see SET menu Storage medium The default is 1 card 2 intern You may change this setting via the SET menu If background images are marked they will be saved only if you answer the system query Save n marked with YES and the hardcopy mode PCX is switched off As for non active backg...

Страница 49: ... window This menu allows you to select if you want to exit the software with or without saving the currently active configuration or to reeset the system with or without saving the currently active configuration Caution Never switch off the camera while the system is still saving data Don t switch it off before the display has gone out I n f r a T e c ...

Страница 50: ...ed on chopper and detector temperature This family of characteristics is saved in a data record of camera specific SPC files in the form of backing points at different object chopper and detector temperatures These files are the result of a calibration During calibration every camera head is measured point by point over the full temperature measuring range at different ambient temperatures and usi...

Страница 51: ...rom the detector signal that has been digitised with 16 bits a current assignment table Look Up Table for 256 possible colours The temperature scale corresponds to a linear colour curve 9 2 Measurement principle The radiation received by the camera in the scanning phase consists of the following fractions Characteristic radiation emitted by the measured object Radiation of surfaces in the ambience...

Страница 52: ...2 Ambient radiation reflected by measured object λ τ ε T P 1 A p o 3 Characteristic radiation of air path λ τ T P 1 p p Total radiation u p p A p o o p o 1 O T P 1 T P 1 T P P λ τ λ τ ε λ τ ε When you switch on the VARIOSCAN high resolution a calibration file is loaded containing the temperature relevant parameters of the current camera configuration This file also contains the thermal characteris...

Страница 53: ...e Planck black body radiator curve in the first approximation Beside different internal parameters the formulas implemented in the control software take into account the following quantities that are either entered by the user automatically detected by the camera or loaded as constants q Emission and distance of measured object q Atmospheric transmission and temperature q Emission and temperature ...

Страница 54: ... meet the safety requirements and thus may result in electric shocks to the operator The front lens of the camera has a high grade coating to provide high IR transmission It should therefore be treated with due care Optical elements should be cleaned by skilled specialists only Avoid touching the mirror surfaces with bare fingers We recommend that you wear soft cotton gloves or even better latex f...

Страница 55: ...Maintenance 55 I n f r a T e c ...

Страница 56: ...nction or necessary technical maintenance of the equipment contact your local agent or send your requests directly to our Customer Service Department JENOPTIK Laser Optik Systeme GmbH Business Unit Camera systems Service Goeschwitzer Str 25 D 07745 Jena Germany Phone 49 3641 65 3302 Fax 49 3641 65 3677 I n f r a T e c ...

Страница 57: ... VARIOSCAN LW 3021 VARIOSCAN LW 3021 PC VARIOSCAN LW 3021 ST VARIOSCAN LW 3021 ST PC VARIOSCAN LW 3022 VARIOSCAN SW 3022 PC complies with the following relevant regulations directives standards documents in the form of harmonised standards EN 50 082 2 Noise immunity EN 55 011 Noise suppression Jena June 04 1996 JENOPTIK Laser Optik Systeme GmbH Dr Erich Hacker Ingolf Berger Executive Vice Presiden...

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