User manual MGD 2621L MKII
Contents
1. wwwwwwwwmamammmmwwaii wi mamawim ia 24 Geometry nee ei ei eee i es 24 eeler 30 ALG so cegsshac citadel eege eeneg 30 Factory KIA AA AA AAA AWA 30 C How to Save changes csccecsecececeteescecesdedeedeseteeeetdeessieesbdeeseseccedeneds 31 5 MAINTENANCE oeni ech Nel a eels acids nic eit aa Godeen de a tee eelitees 32 Ge TrOUDIGSMOOUING eege ence e setudetegenebescnestinge Kwake kisera tkredi u 33 Appendix A Background information lt w wswwmmamwnawamanwwnanzwnanzmanaimaama anazaa 34 Luminance Uniformity Correction lt w w wwmmanmwanamwanammanwmaaamwwaza 34 Power SAVING system 34 Appendix B Technical Specifications wwwwmmaamananmanaamwnwaminwmaaaamana 36 MGD 2621L User s Guide 7 MGD 2621L User s Guide 8 1 INTRODUCTION 1 1 Overview Resolution and bandwidths The BARCO MGD 2621L is a high resolution greyscale display Its outstanding visual performance combining a 2 MegaPixel resolution with a high brightness makes it ideal for diagnostic imaging and many other medical and scientific applications The MGD 2621L is compatible with any AC power system worldwide and automatically synchronizes to a wide range of sync frequencies Its high speed video amplifier supports pixel clocks up to 250 MHz The memory system The internal memory system can contain the adjustments for 16 different scanning formats the so called scanning mod2. Contrast scroll bar The short stroke in the bar indicates the calibrated position the long stroke indicates the current setting To put brightness in calibrated position 1 Turn the wheel under the bezel to select Brightness in the OSD main menu Press the control knob shortly The brightness control menu appears In the brightness control menu select Brightness CAL position and press the control knob shortly Brightness Brightness CAL position Manual Brightness adjustment Exit Brightness control menu To control brightness manually 1 Turn the wheel under the bezel to select Brightness in the OSD main menu Press the control knob shortly The brightness control menu appears In the brightness control menu select Manual brightness adjustment and press the control knob shortly The brightness scroll bar appears Turn the wheel under the bezel until you have reached the desired brightness Press the control knob shortly or wait a few seconds to return to the brightness control menu In the brightness control menu select Exit and press the control knob shortly to return to the main menu Alternatively you can just wait a few seconds and the OSD returns to the previous menu automatically Operation 19 eae Se Brightness scroll bar The short stroke in the bar indicates the calibrated position the long stroke indicates the current setting 3 3 Viewing Status information You can view the st
3. Return to the previous menu by pressing the control knob shortly or selecting Exit when present b Description of the adjustments ADJUSTMENTS Geometry Focus ALC Luminance uniformity Factory reset Exit Adjustments menu Geometry Rotation Advanced 24 Auto geometry Automatically adjusts geometry to almost 100 perfect This adjustment requires an image that covers the full screen from left to right and from top to bottom E g the desktop pattern of a computer is a good image Vertical position Blanking Blanking left Advanced 25 Blanking Blanking top Interlacing Pre correction In most cases you do not need to change this adjustment You may need to increase this adjustment only when the connected video and sync signal contains an abnormally big number of equalization pulses before the vertical sync more than 8 lines resulting in a phase error geometry distortion at the bottom of the image Interlacing Post correction In most cases you do not need to change this adjustment You may need to increase this adjustment only when the connected video and sync signal contains an abnormally big number of equalization pulses after the vertical sync more than 8 lines resulting in a phase error geometry distortion at the top of the image SH Compensation If your display is equipped with the Southern Hemisphere option the on screen display menu contains additional functions
4. MediCal you can control and adjust the display by means of the built in On Screen Display OSD 3 1 Switching on off Power on off Switch on the display by means of the power switch 6 at the rear To switch off the display so that the power is disconnected toggle the power switch 6 at the rear again Manual stand by To put the display in manual stand by mode press the control knob 2 shortly As a result the power indicator 3 turns orange Note You cannot switch the display in manual stand by when the on screen display OSD is visible In that case first Control knob exit the OSD and then press the control Power indicator knob to switch to stand by mode To activate the display from stand by mode press the control knob 2 again As a result the power indicator 3 turns green again 3 2 Contrast and brightness control Contrast and brightness can be controlled through the OSD menus To activate the OSD Turn the turning wheel under the bezel from left to right or from right to left As a result the OSD main menu appears Note The wheel should turn over at least 30 degrees before the OSD becomes visible Operation 17 MAIN MENU Contrast CAL Brightness CAL Status information Settings Adjustments Exit The OSD main menu The main menu indicates the current setting for contrast and brightness This can be e CAL The calibrated position This is the prefe
5. Vac to 264 Vac automatic 8 Input for video signal 9 Input for Horizontal or Composite sync signal 10 Input for Vertical sync signal 11 Output of serial data RS232 format MT G 12 In k put for serial data RS232 CTT TD formal 13 USB upstream port 1 6 7 8910 1112 13 14 14 USB downstream ports 3 Installation 12 2 4 Signal connection a Connection of video signals The connected equipment must comply to all relevant safety demands Important The use of low quality video cables can distort the video signal and influence diagnosis Connect the video output of the computer s imaging board to the video and sync inputs on the display s rear panel Use a proper video cable The video cable is not supplied with the display unless the display comes as part of a complete BARCO MeDis system that also contains an imaging board The inputs accept the following signals e Video with separate horizontal and vertical sync The video cable has 3 wires Connect the video signal to the connector Video 8 Connect the horizontal sync signal to the connector HS CS 9 Connect the vertical sync signal to the connector VS 10 e Video with external composite sync The video cable has 2 wires Connect the video signal to the connector Video 8 Connect the composite sync signal to the connector HS CS 9 e Video with internal composite sync sync on video The video cable has
6. and to the display e Check if the power button is switched on There appears no image on the picture tube the orange LED Is on The display is switched in Stand by manually or by the automatic Power saving system e Press the control knob at the front shortly e Try to switch on the display by pressing any key on the keyboard of the computer that produces the video and sync signals for the display e Check if both horizontal and vertical sync signals are connected to the display and to the computer On the picture tube appears the message No Valid Sync Signal e Check if both horizontal and vertical sync signals are connected to the display and to the computer e Check if the sync signals are connected in the proper way refer to the chapter Installation e Check if both horizontal and vertical sync frequencies match the display specifications refer to the chapter Technical specifications For other problems please consult your technical service department Troubleshooting 33 APPENDIX A BACKGROUND INFORMATION Luminance Uniformity Correction A characteristic or limitation of every picture tube CRT is that the luminance decreases towards the edge of the screen surface The decrease is normally 20 to 30 This is caused by the shape of the picture tube Inside the CRT a so called electron gun shoots an electron beam towards the front the glass panel Because this panel is rather flat instead of
7. can also be done on the display itself by means of an extensive on screen menu system accessible by using the control knob at the front Remote control protocols The PC on which the remote control software runs can communicate with the MGD 2621L through 2 possible interfaces RS 232 and USB For USB the MGD 2621L provides a hub function This means that the user can connect peripheral USB devices such as a keyboard or mouse to the display s USB down ports Power saving system The MGD 2621L is equipped with a power saving system When left idle for a certain time the computer connected to the display will power down the display in several steps The power saving system can be switched on or off during the installation or adjustment of the display This system requires a computer imaging board that supports power saving management 1 2 About the manuals This guide is meant for people who want to install and use the MGD 2621L display as well as people who need to install and adjust the display The chapter Advanced Adjustments is meant for trained engineers only because it describes actions and procedures that require a technical skill to be performed properly The use of the software MediCal is described in the MediCal User s Manual Introduction 10 2 INSTALLATION 2 1 Precautions Keep your original packaging It is designed for this display and is the ideal protection during transport Do not lift the di
8. during a computer session with MediCal if the computer does not respond anymore SH compensation optional Indicates if Southern Hemisphere compensation is switched on or off Note Southern Hemisphere compensation is an option If the option is not installed in the display this line does not appear in the menu Actual H frequency Actual V frequency These are the actual horizontal and vertical sync frequencies of the connected video signal They are measured constantly by the display 3 4 Other adjustments The main menu items Settings and Adjustments are reserved for trained service staff and are therefore password protected Operation 21 4 ADVANCED SETTINGS AND ADJUSTMENTS FOR SERVICE STAFF ONLY Important The functions and controls described in this chapter can have a serious impact on the performance of the display They should be touched by trained service staff only 4 1 Settings ALC OFF LUC OFF Orbiter OFF Power save ON Display address 1 User controls disable OFF Exit The Settings menu To change the settings 1 Turn the wheel under the display bezel from left to right or from right to left to activate the On Screen Display OSD main menu 2 Inthe main menu turn the wheel to select Settings 3 Press and hold the control knob for a few seconds The Settings menu appears It displays each setting and its current status Note If you press only shortly the message Service protected appe
9. leave the computer idle for a longer period the imaging board now delivers horizontal sync only As a result the display s micro controller switches off a number of internal circuits The power consumption has now dropped with about 42 Background information 34 At last the imaging board delivers no sync signals at all and the micro controller switches off all but one power supplies in the display Only the micro controller s own supply keeps on running resulting in a very low power consumption of 6 W If you start using the computer again the imaging board switches on both sync signals and the micro controller switches on the display The times after which the different steps of power management must become active is set in the PC s display properties Background information 35 APPENDIX B TECHNICAL SPECIFICATIONS Picture tube Faceplate transmission 34 Faceplate type AR panel Image representation landscape Phosphor P45 Light output P45 phosphor Calibrated 300 Cd m2 Peak 600 Cd m2 Resolution Max adress pixels 1600 Max adress lines 1280 Scanning systems Horizontal scanning Multi sync controller controlled Minimum frequency 30 kHz Maximum frequency 110 kHz Minimum blanking 2 2 s Storable scan frequencies 16 Prealigned scans 8 Vertical scanning Minimum frequency 50 Hz Maximum frequency 160 Hz Minimum blanking 300 s after leading edge Geometry Nominal size 4 3 rati
10. to adjust the image geometry If the option is not installed in the display this menu does not appear SH Compensation SH Compensation ON OFF For proper geometry adjustment in the Southern Hemisphere you must switch SH Compensation ON If not the SH controls will not function SH Compensation SH Top Advanced 26 SH Compensation SH Bottom With SH Compensation on we advise to use the SH Position control instead of the Horizontal Position control in the Geometry menu Advanced geometry Horizontal skewing Advanced geometry Horizontal bowing Advanced geometry Horizontal trapezium Advanced geometry Horizontal parabola Advanced 27 Advanced geometry Corner top left Advanced geometry Linearity amp S correction Horizontal linearit Advanced geometry Linearity amp S correction Horizontal S corr S E E CE Advanced geometry Linearity amp S correction Vertical linearity Advanced 28 Advanced geometry Linearity amp S correction Vertical S corr Advanced geometry Advanced bowing amp skewing Horizontal bowing left Advanced geometry Advanced bowing amp skewing Horizontal bowing right Advanced geometry Adv
11. 1 wire Connect the video with sync signal to the connector Video 8 Notes s The video inputs cannot be connected in loop through daisy chain e The required video amplitude 700 mV 3 dB e The required sync amplitude 400 mV b Connection of data signals The display can be controlled remotely by a computer through the serial data bus A typical example of this is the MediCal software that controls the display MediCal runs on a PC that is connected through the serial data bus This PC is not necessarily the same computer as the one that produces the video signals Unlike the video signals it is possible to daisy chain the serial data bus This means you can control different displays from one PC Installation 13 On RS 232 1 Connect one end of the serial data cable to one of the PC s COM ports If the COM port has a 25 pin connector you will need to use a D25 to D9 interface connector The cable and the interface connector are both supplied with MediCal 2 Connect the other end of the serial data cable to the Remote In connector 12 on the display s rear panel 3 For a daisy chain application connect the Remote Out connector 11 of the first display to the Remote In connector 12 of the next display On USB 1 Plug one end of the USB cable into a USB port of the connected computer 2 Plug the other end of the USB cable into the USB upstream port 13 of the display 3 In case o
12. V5993223 00 November 2001 BarcoView Theodoor Sevenslaan 106 8500 Kortrijk Belgium Phone 32 0 56 23 32 44 Fax 32 0 56 23 33 74 E mail sales medical barco com http www barcoview com BarcoView Inc 3059 Premiere Parkway Duluth Georgia 30097 USA Phone 1 678 475 8000 Fax 1 678 475 8100 E mail sales medical barco com http www barcoview com BarcoView LTD 16F 1 Cheng Loong Plaza 33 Min Sheng Road Section 1 Pan Chiao Taipei Hsien Taiwan R O C Phone 886 2 2957 8357 Fax 886 2 2957 4080 MGD 2621 L Medical Greyscale Display Installation amp User Manual 2001 BARCO nv All rights reserved Trademark information TrueGrey MediCal BarcoMed and MeDis are registered trademarks of BARCO NV Windows NT is a registered trademark of Microsoft Corporation MGD 2621L User s Guide 3 MGD 2621L User s Guide 4 SAFETY INSTRUCTIONS U RISK OF ELECTRIC SHOCK 4 e DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER TO QUALIFIED SERVICE PERSONNEL Regulations e This apparatus conforms to CE UL 2601 1 CAN CSA C22 2 No 601 1 M90 IEC 601 1 DHHS TITLE 21 Subchapter J Part 1020 e This apparatus is classified as Type B without Applied Part Usage in Hazardous locations e Class equipment e Equipment not suitable for use in the presence of a flammable anaesthetic mixt
13. anced bowing amp skewing Horizontal skewing left Advanced geometry Advanced bowing amp skewing Horizontal skewing right Advanced 29 Focus Static focus Adjust Static focus to obtain an image as sharp as possible in the center Focus zone You can adjust the focus in 25 independent zones Turn the wheel to obtain an image as sharp as possible in the selected zone Press the control knob to switch to the next zone ALC Minimum illuminance Dim the light in the room Adjust until you are satisfied with the contrast of the picture Maximum illuminance Create normal ambient light in the room Adjust until you are satisfied with the contrast of the picture Luminance uniformity This menu allows you to calibrate the display including the Luminance Uniformity circuit Proceed as follows 1 Connect the X Rite DTP92 sensor and apply the black shield see chapter Installation 2 Follow the instructions on the screen Factory reset This function allows you to undo all adjustments you have made since the display left the factory Select Go ahead to restore the factory adjustments Select Exit to return to the previous menu without erasing the adjustments Advanced 30 c How to save changes Proceed as follows 1 After having made the adjustments select Exit in each appearing menu until the Save Changes message appears 2 Select Yes to save the changes Select No to exit the OSD men
14. ars 4 Turn the wheel to select the setting you want to change Press the control knob shortly to change the selected setting 6 For Display address you can change the setting by turning the wheel Return to the Settings menu by pressing the control knob For the other settings the new status instantly appears in the Settings menu oa Explanation of the Settings menu items ALC ALC is short for Ambient Light Compensation When this setting is on the contrast is controlled automatically depending on the ambient light measured by the ALC sensor 5 in the bezel Advanced 22 LUC LUC is short for Luminance Uniformity Control When switched on the internal waveform processor will modulate the gain of the video amplifier so that the luminance is equal all over the screen within a tolerance of 5 The LUC system can be calibrated in the Adjustments menu see further Orbiter The Orbiter is an internal circuit that when switched on will slightly and slowly move the image to prevent pixel burn in Power save This setting can switch the automatic power saving system see Introduction chapter on or off Display address In multi head systems multiple displays controlled by one system each display must have a different address With this setting you can set the display address from 1 to 16 User controls disable With this setting you can enable or disable the user controls When OFF the user contr
15. atus and actual settings of the display You cannot change them in the Status Menu Changing the settings is reserved for trained service staff only To view the status information Turn the wheel under the bezel to select Status information in the OSD main menu The Status information menu appears The only control in the menu is Exit STATUS INFORMATION Display Name MGD 2621L MKII Serial Number 5114147 Mode Name New mode Mode H frequency 48 32 kHz Mode V frequency 59 94 Hz Software Version v1 01 Run time 50 hours White level 300 cd m2 Activity timeout SH compensation Actual H frequency 72 02 kHz Actual V frequency 75 00 Hz Exit Status information menu Explanation of the Status information menu items Display Name This is the display type Serial Number This is the display s serial number Mode Name The currently selected scanning mode Operation 20 Mode H frequency Mode V frequency These are the horizontal and vertical sync frequencies of the currently selected scanning mode These are the figures stored in the memory Software Version The internal software version Run time The total operating time since production including burn in time White level The display s white level or light output after calibration in calibrated position Activity timeout This is the time expressed in seconds before the display interrupts the data communication with the computer e g
16. es Eight of them are adjusted and stored in the factory Each scanning format is characterized by its sync signals The display s internal micro controller continuously samples the connected sync signals and compares them to the scanning modes already stored in the memory If the connected signal has already been stored the micro controller adapts the image to the corresponding adjustment values in the memory and further adjustments are unnecessary Image conformity and consistency Image conformity and consistency are the keywords In our factory the MGD 2621L displays are perfectly adjusted and calibrated before they are shipped to the customer Internal circuits like the TrueGrey and Automatic White Stability AWS systems ensure display consistency over time Conformity with the original image quality is guaranteed by the automatic calibration which can be done by means of an optical sensor connected to the Sensor connector on the display The sensor is not supplied with the display Calibration is done from within the BARCO MediCal Pro software Introduction 9 Calibration and adjustments The conformity calibration as well as the complete adjustment of the display can be performed by means of the remote user friendly MediCal software package MediCal which runs under Microsoft Windows NT is especially developed to adjust and check BARCO s medical displays MediCal can be ordered separately A lot of adjustments
17. f loop through connection plug one end of a second USB cable into one of the USB downstream ports 14 of the display Plug the other end into the upstream port 13 of the next display 4 The other USB downstream ports of the monitor 14 can be used for the connection of peripheral equipment like a mouse keyboard scanner etc Note Do not connect both RS 232 and USB to prevent conflicts Installation 14 c Connection of optical sensor To calibrate the display connect the optical sensor to the Sensor connector 1 at the front Notes e The display supports the DTP 92 from X Rite as optical sensor e The optical sensor is not supplied by BARCO e Always use the Ambient Light Shield during calibration d Connection of power 1 Power cord Utilize a UL listed detachable power cord 3 wire type SJ or equivalent 18 AWG min rated 300 V min provided with a hospital grade type plug 5 15P configuration for 120V application or 6 15P for 240V application 2 Plug one end of the power cord into the rear of the display connector LINE 7 Plug the other end into a grounded AC power outlet The display automatically adapts to the voltage The voltage range is 90 264 VAC 2 5 Positioning the display The tilt and swivel base allows you to adjust the height and viewing angle of the display to obtain an optimal viewing comfort Installation 15 Important considerations The best envi
18. having a spheric shape the electron beam has to travel a longer distance in the corners than in the center So the intensity is higher in the center This phenomenon is even increased by the irregular distribution of the phosphor and aluminium layer on the glass panel These tend to be thicker in the center BARCO has developed a special system called Luminance Uniformity Correction LUC that solves this problem The LUC system enhances the light output at the edges of the CRT so that the luminance there is the same as in the center The LUC system is calibrated in the factory From time to time it has to be re calibrated at the customer s site by means of the light sensor you use for normal color calibration The system can be calibrated and switched on or off by a qualified technician Power saving system The display is equipped with circuits that can handle power saving management When the system is switched on it can power down the display in several steps The system is controlled by the imaging board or the PC that delivers the video signals When you are working on the computer the imaging board delivers both sync signals and the display is operating normally When you don t touch the computer keyboard for a certain time the imaging board only delivers vertical sync This is sensed by the display s micro controller that blanks the image on the CRT This results in a drop of power consumption with about 25 When you
19. her voltage may damage the apparatus If you are not sure of the type of power supplied consult the power company Do not overload wall outlets and extension cords as this may result in fire or electric shock e Mains lead protection U S Power cord Supply cords should be routed so that they are not likely to be walked upon or pinched by items placed upon or against them paying particular attention to cords at plugs and receptacles Water and moisture e Never expose the apparatus to rain or moisture e Never use the apparatus near water e g near a bathtub washbasin swimming pool kitchen sink laundry tub orinawet basement Ventilation Donotcover or block the ventilation openings in the cover of the set When installing the apparatus in a cupboard or another closed location heed the necessary space between the set and the sides of the cupboard Installation e Place the apparatus on a flat solid and stable surface that can bear the weight of at least 3 monitors If you use an unstable cart or stand the set may fall causing serious injury to a child or adult and serious damage to the equipment More warnings in the Installation chapter MGD 2621L User s Guide 5 MGD 2621L User s Guide 6 CONTENTS T A YA Yo Yo LU sa 0 WAASWA AA et dd eee ee Stee AAA 9 er AAA Re See iin eee 9 Resolution and bandwidths A 9 THE IMOMOry sy Ma Aa 9 Image conformity and CONSIStENCY w ww wmwwa
20. mwnwa mwana nzwanamwnwaninama naamua 9 Calibration and adjustments AAA 10 Remote control protocols AA 10 POWEr saving Syste ss sce cacceeecctebscececuspobeeds ack cscundeavhestesuee caset ELSE zama e ees 10 1 2 About the man lS siine aa iaei oiea aa aa EAA 10 EI TEE 11 E RTE 11 2 2 The package Contents inisenisi teehee dee EA 11 2 3 Controls ANd connechors 0 0 eee cette eeeeeeeeeeeeeeeeeeeeeneeesesaeeesneeeensaeeeseaaes 12 2 4 Signal conection aa AK dancer oa ee 13 a Connection of video signals 0 ee eeeeeeeeeeeeeeeeeeeneeeeeeeeeeeeeeeeeteeeeaas 13 b Connection of data Signals wwswmwaawananzwanamwnwaminama nanma 13 c Connection of optical SENSON oe eee ee eeeeeeeeneeeeeeeeeeeneeeeeeteeeeeas 15 d Connection Of power 15 2 5 Positioning the display wwwwawwmnamwaanamanuwaaazwnanzwaaaimanzmaazaa 15 Important considerations oo ee cece ee eeee teen eeeeeeeeeceaaeeeseeeeeteaeeeenaeeeeneeeene 16 3 Operation User COntrols siisi sncessectencteee cut peseedsaenesctnesvsn sees einernie iasa 17 3 1 Switching On Lett seet geese a heed peed a eset Seis 17 3 2 Contrast and brightness Control 17 3 3 Viewing Status Information 20 3 4 Other EE 21 4 Advanced settings and Adjustments For service staff onhy 22 AT SOU OS ET 4 2 Adjustments a How to make the adjustments 0 0 eee ececeeeeeeeeeeeeeeeeneeeseeeeeeneeeeeaaes 24 b Description of the adjustments
21. o 396mm x 297mm Nominal size 5 4 ratio 370mm x 296mm Inputs Video BNC connectors Nominal level 0 7 Vpp Sync BNC connectors Nominal level 1 4 Vpp Communication inputs outputs RS232 9 pin sub D connector Baudrate 9600 USB 1 up port 4 down ports Power supply Voltage 90 264 V Frequency 45 65 Hz Inrush current 6 A Environmental Temperature range C Storage 20 65 Operation 0 45 Within specs 15 30 Altitude storage 25 000 ft operational 10 000 ft Humidity relative 95 max non condensing Weight Unpacked Packed 34 8 kg 40 4 kg Dimensions packing mm H x W x D 740 620 580 Dimensions monitor mm Height 502 with tilt amp swivel 438 without tilt amp swivel Width 500 Depth 527 Modifications reserved Technical specifications 36
22. ols are not disabled and the user can activate and use the OSD menus When ON the user controls are disabled After quitting the OSD the user will no longer be able to activate the OSD To activate the OSD again when the user controls are disabled use the following code 1 Turn the wheel under the bezel 3 times from right to left 2 Turn the wheel 3 times from left to right 3 Turn the wheel 3 times from right to left Note This should be done in quite a short time Saving the settings The settings are automatically saved after changing them Advanced 23 4 2 Adjustments a How to make the adjustments 1 Turn the control knob at the rear from left to right or from right to left to activate the On Screen Display OSD main menu In the main menu turn the control knob to select Adjustments Press the control knob for a few seconds The Adjustments menu appears Note If you press only shortly the message Service protected appears Turn the control knob to select the category of adjustments you want to make Press the control knob shortly to enter the selected category In the selected menu select the adjustment you want to make and press the control knob shortly to display the adjustment scroll bar Turn the control knob to perform the adjustment After adjusting press the knob shortly to confirm the adjustment and return to the menu or press for a longer time to undo the adjustment and return to the menu
23. ronment for diagnostic imaging is one with controlled and dimmed ambient light The human eye s sensitivity depends on the ambient light strength It is most sensitive to small contrast changes or subtle image details at limited ambient light levels The best ambient light level expressed in Lux depends on the application An office illumination typically requires 500 Lux A dimmed environment like a softcopy room requires less than 100 Lux Using your display in a controlled and dimmed environment also extends its lifetime because the display can operate at limited brightness and contrast These levels correspond to the calibrated position in most cases A controlled ambient light environment implies the ambient light is as constant as possible Cover windows to keep out the daylight Avoid switching the lights and viewing boxes on and off A consistent environment results in more image consistency and less eye fatigue Avoid reflections in the picture tube Provide indirect lighting Don t place the displays in front of or close to a light source like a window or viewing box although this may be very tempting As a rule of thumb keep viewing boxes at least one metre 3 feet away from the displays Installation 16 3 OPERATION USER CONTROLS Important The best way to adjust and control the display is by using MediCal which displays the ideal test patterns for correct adjustment However in case you do not dispose of
24. rred setting ina controlled environment e ALC For contrast only This indicates the Ambient Light Compensation ALC is on and contrast is controlled automatically depending on the ambient light e lt empty gt When the main menu does not specify a setting contrast or brightness is manually set to a different value than the calibrated position To put contrast in calibrated position 1 Turn the wheel under the bezel to select Contrast in the OSD main menu 2 Press the control knob shortly The contrast control menu appears 3 Inthe contrast control menu select Contrast CAL position and press the control knob shortly Contrast CAL position Manual contrast adjustment Exit Contrast control menu To control contrast manually 1 Turn the wheel under the bezel to select Contrast in the OSD main menu 2 Press the control knob shortly The contrast control menu appears 3 Inthe contrast control menu select Manual contrast adjustment and press the control knob shortly The contrast scroll bar appears 4 Turn the wheel under the bezel until you have reached the desired contrast 5 Press the control knob shortly or wait a few seconds to return to the contrast control menu Operation 18 6 In the contrast control menu select Exit and press the control knob shortly to return to the main menu Alternatively you can just wait a few seconds and the OSD returns to the previous menu automatically E ss AA
25. splay all by yourself to avoid injury Avoid reflections in the picture tube to reduce eye strain Place the display on a strong and stable table or desk if used as desktop display Keep the display away from heat sources and provide enough ventilation in case it is built in a rack or console Keep the display away from strong sources of magnetic fields Make sure the display and computer are both switched off before connecting the signals 2 2 The package contents The MGD 2621L display The accessory box in which you found this manual Notes The MGD 2621L can be part of a complete MeDis system consisting of the display itself an imaging board and software In that case the package contains a lot more items The contents of the package is then described in the manual of the complete system The ambient light shield inside the accessory box should always be used during conformity calibration with the X Rite DTP92 optical sensor Installation 11 2 3 Controls and connectors 1 Connector for optical sensor RS232 format 2 Control knob consisting of a push button at the front and a turning wheel under the bezel The control knob is used for switching the power on off and selecting and performing functions in the OSD on screen display menu 3 Power indicator 4 USB downstream port 5 Ambient Light Compensation ALC sensor 6 Power switch 7 AC power input Accepts a voltage from 90
26. ure with air or with oxygen or nitrous oxyde FCC notice This equipment has been tested and found to comply with the limits of a class B digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipmentis operated inacommercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense A Power connection e Power cord Utilise a UL listed detachable power cord 3 wire type SJ or equivalent 18 AWG min rated 300 V min provided with a hospital grade type plug 5 15P configuration for 120V application or 6 15P for 240V application e Read the safety and operating instructions before operating the apparatus e Retain safety and operating instructions for future reference e Adhere to all warnings on the apparatus and in the operating instructions manual e Follow all instructions for operation and use e Warning This apparatus must be earthed Power requirements connect the apparatus to an AC voltage as indicated at its back Using a lower voltage the apparatus will not be able to operate Using a hig
27. us without saving the changes What happens upon saving e When the current scanning mode was already stored in the display memory the scanning mode is updated with the new adjustment values e When the scanning mode was not yet stored in the memory the display will create a new scanning mode in the memory However when the memory was full the monitor will display a list of scanning modes in the memory and ask if you wish to overwrite one of them If you want to store the adjustments you have made you will have to overwrite one of the scanning modes in memory Advanced 31 5 MAINTENANCE Picture tube The glass panel of the picture tube is handled with a special coating Take care not to damage or scratch the coating Clean the picture tube with a soft woolen or cotton cloth The cloth should be moist not wet Use a watery solution or a mild commercial glass cleaning solution Apply e g spray the solution on the cloth not on the picture tube Cabinet Clean the cabinet using a recognized cleaning product for medical equipment The cloth you use must be moist not wet The cabinet has been tested for resistance to the following products Cidex Betadine Alcohol Isopropyl and Ethyl Ammonia based cleaners Windex and Aquasonic Gel Maintenance 6 TROUBLESHOOTING There appears no image on the picture tube the green LED on the front is out e Check if the power cord is properly connected to the power outlet
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