MGD 2621 P Medical Greyscale Display Installation & User Manual
Warning This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. © 2001 BARCO nv. Allrights reserved.
SAFETY INSTRUCTIONS • Read the safety and operating instructions before operating the apparatus. • Retain safety and operating instructions for future reference. • Adhere to all warnings on the apparatus and in the operating instructions manual. • Follow all instructions for operation and use. •This apparatus conforms to: IEC601-1, UL2601-1, cUL2601-1, EN 60601-1 • This apparatus is classified as Type B without Applied Part.
CONTENTS Introduction ........................................................................................................ 5 Overview ...................................................................................................... 5 About the manuals ....................................................................................... 6 Installation .......................................................................................................... 7 Precautions ...........................
INTRODUCTION Overview Resolution and bandwidths The BARCO MGD 2621 P is a high-resolution greyscale portrait display. Its outstanding visual performance, combining a 2 MegaPixel resolution with a very high brightness, makes it ideal for medical imaging and many other medical and scientific applications. The MGD 2621 P is compatible with any AC power system worldwide and automatically synchronises to a wide range of sync frequencies. Its high-speed video amplifier supports pixel clocks up to 250 MHz.
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. A lot of adjustments can also be done on the monitor itself, by means of an extensive onscreen menu system, accessible from the rear panel controls.
INSTALLATION Precautions The package contents • Keep your original packaging. It is designed for this display and is the ideal protection during transport. • Do not lift the display 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.
Unpacking the display The display is packed in a box on a pallet. To unpack: 1. Cut the ribbons around the box by means of a pair of wire-cutters. 2. Lift the box from the pallet. The display remains standing on the pallet. 3. Remove the Accessory box and the upper polystyrene piece. 4. Remove the plastic bag from the display. 5. Lift the display out of the lower polystyrene piece. Power connection 1. Power cord: Utilise a UL-listed detachable power cord, 3-wire, type SJ or equivalent, 18 AWG min.
Location of controls and connectors {1} {2} {3} {4} {5} {6} {7} {8} {9} {10} 1 2 Optical sensor plug Contrast knob Brightness knob Remote (RS-232) output Remote (RS-232) input Video input Horizontal / composite sync. input Vertical sync.
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. 1. Check the termination impedance of the display’s video input and the impedance of the imaging board that produces the video signals you want to connect. You can find the termination impedance of the video input on the label on the rear of the display. Both values must be equal.
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 daisychain the serial data bus. This means you can control different displays from one PC. To connect the data signals: 1.
Important considerations • The best environment 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.
OPERATION: USER CONTROLS How to switch on the display Press the Power button {10} on the rear panel to switch on the display. Note: The display can be switched off by the automatic power saving system. This is indicated by the green LED. The LED is ON when the display is in stand-by. How to use the automatic power saving system The power saving system, if switched on, can power down the display when you don't use the computer that produces the video and sync. signals for a while.
Note: When you change the contrast (brightness) control one step at the time (click per click), the picture contrast (brightness) will change although the cursor on the OSD does not move. This is because contrast (brightness) can be adjusted in more than 4000 steps, and the OSD is only 6 inches wide. Advised setting for contrast and brightness A fixed vertical dash in the OSD indicates the calibrated value.
ADVANCED ADJUSTMENTS (FOR SERVICE STAFF ONLY) The MediCal software The display is actually designed to be adjusted by means of MediCal. MediCal provides a very userfriendly way to control and adjust the display. Even more, you need MediCal to automatically calibrate the display. The on-screen menu system Especially for circumstances where MediCal is not available, an extended on-screen menu system is provided. Only qualified service personnel should use it! There are 7 menus.
To exit the menu system: 1 Turn the Contrast knob until the Save Changes dialog appears in the OSD: 2 Turn the Brightness knob to toggle between Yes and No. Select Yes to save the changes, select No to exit without saving the changes. 3 Turn the Contrast knob to exit. See also: Menu Exit, later in this chapter. A word about the memory system As explained in the introduction of this manual, the memory of the display can hold four different scanning formats.
Focus 1 Turn the Brightness knob once to enter the Focus menu. The first focus adjustment appears: Static Focus. 2 Turn the Brightness knob to adjust static focus. Static focus has effect on the complete screen. 3 Turn the Contrast knob to switch to the next focus adjustment. This is the first of 9 zonedependent focus adjustments. 4 Turn the Brightness knob to adjust the focus in the selected zone. 5 Turn the Contrast knob to select the next zone.
If your display is equipped with the Southern Hemisphere option, the on-screen display menu contains additional functions to adjust the image geometry. The Southern Hemisphere commands are in the Geometry menu: Info - SH Compensation On (Off): For proper geometry adjustment in the Southern Hemisphere, SH Compensation must be ON. If not, the SH controls will not function. - SH Comp. Top: - SH Comp. Bottom: Turn the Contrast knob to switch to the next menu. This is the display type.
Light IMPORTANT: These adjustments are service adjustments. They have to be done by means of the proper measurement tools. Do not adjust if you don’t have the right skills and equipment! These adjustments are described in the Service Manual. Luma equalizing Turn the Brightness knob to toggle the LUC system between Off and On. IMPORTANT: The normal way to adjust Luminance Uniformity Correction (LUC), is the automatic way, using MediCal. The manual, zonedependent adjustments are service adjustments.
Turn the Brightness knob to toggle the automatic Power Save system between Off and On. Turn the Brightness knob to set the Remote time-out. This is the time, expressed in seconds, before the display interrupts the communication with the computer if the computer does not respond anymore. Turn the Brightness knob to set the display’s address. This is necessary if several displays are controlled by the same computer (by means of MediCal). In that case, every display must have a different address.
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 woollen 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 recognised cleaning product for medical equipment.
TROUBLESHOOTING There appears no image on the picture tube, the green LED on the front is out • Check if the power cord is properly connected to the power outlet and to the display. • Check if the power button is depressed. • Check if contrast and brightness are not set to 0. There appears no image on the picture tube, the green LED is on The display is switched in Stand-by by the automatic Power saving system.
APPENDIX A: BACKGROUND INFORMATION Clamping Inside the display, the video signal from the video input is connected to the video amplifier. This circuit amplifies the signal, paying special attention to two signal levels: the amplitude and the dc-level. The dc-level of the video signal in the video amplifier determines the eventual black level of the image on the picture tube (CRT). The circuits of the video amplifier can pick up interferences from different ambient sources.
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.
APPENDIX B: TECHNICAL SPECIFICATIONS Picture tube: Faceplate transmission: +/- 33% Faceplate type: ARC panel Image representation: portrait Phosphor: P45 Light output: Calibrated: 300 cd/m² Peak: 600 cd/m² Resolution: Max. adress. pixels: 1280 Max. adress. lines: 1600 Scanning systems Horizontal scanning: Multi sync: -controller controlled Minimum frequency: 80 kHz Maximum frequency: 130 kHz Minimum blanking : 2.
MGD 2621 P User's Guide 26
B410030/Rev. 00 February 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.
