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GE Alpha RT 32551 Installation Instructions Manual

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GE Healthcare
Alpha RT
Installation Instructions
0459
32551-IMG rev 6
Table of Contents
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Summary of Contents for GE Alpha RT 32551

  • Page 1 GE Healthcare Alpha RT Installation Instructions 0459 32551-IMG rev 6...
  • Page 3 Tel:+ 36 23 410 000 Fax:+ 36 23 410 193 Internet and Service: http://www.gehealthcare.com/worldwide.html GE Hungary Kft., a General Electric company, going to market as GE Healthcare. This manual applies to Alpha RT units with software version 7.71a and up.

  • Page 5: Table Of Contents

    Removal of the back cover........................39 Preventing X-rays (for example in exhibition)..................39 Transformer voltage tapping ........................40 Powering up..............................40 Anode run voltage check (Pr#57 Ano) or adjustment to 50 Hz mains network ....40 4.10 Preheat and mA-regulation check......................42 32551-IMG rev 6 GE Healthcare...
  • Page 6 5.2.14 AEC adjustment .............................77 5.2.15 Adjusting the AEC board..........................82 5.2.16 Adjusting the optical density (=O.D)......................83 5.2.17 Thickness compensation adjustment ....................85 5.2.18 kV compensation ............................86 5.2.19 Density programming..........................87 Alpha RT installation step by step ..............89 Software block diagram ..........................89 GE Healthcare 32551-IMG rev 6...

  • Page 7: Introduction

    Term “Alpha RT” in this manual refers to Alpha RT MGF-101 unit. ENERAL SAFETY INFORMATION NOTE! Only engineers trained by GE Healthcare are allowed to install the unit. parts installed by nontrained personnel carry no warranty! CAUTION! Always check for proper seating on all the connectors located in the areas you have worked.
  • Page 8 Chapter 5.2.10, Light field intensity adjustment for collimator light field intensity adjustment and Chapter 4.9, Anode run voltage check (Pr#57 Ano) or adjustment to 50 Hz mains network for anode run voltage adjustment. GE Healthcare 32551-IMG rev 6...

  • Page 9: Language Warning

    • Nesnažte se o údržbu tohoto zařízení, aniž byste si přečetli tento provozní návod a pochopili jeho obsah. • V případě nedodržování této výstrahy může dojít k poranění pracovníka prodejního servisu, obslužného personálu nebo pacientů vlivem elektrického proudu, respektive vlivem mechanických či jiných rizik. 32551-IMG rev 6 GE Healthcare...
  • Page 10 • Älä yritä korjata laitteistoa ennen kuin olet varmasti lukenut ja ymmärtänyt tämän huolto-ohjeen. • Mikäli tätä varoitusta ei noudateta, seurauksena voi olla huoltohenkilöstön, laitteiston käyttäjän tai potilaan vahingoittuminen sähköiskun, mekaanisen vian tai muun vaaratilanteen vuoksi. GE Healthcare 32551-IMG rev 6...
  • Page 11 Serviceanleitung gelesen und verstanden zu haben. • Wird diese Warnung nicht beachtet, so kann es zu Verletzungen des Kundendiensttechnikers, des Bedieners oder des Patienten durch Stromschläge, mechanische oder sonstige Gefahren kommen. ΠΡΟΕΙΔΟΠΟΙΗΣΗ Το παρόν εγχειρίδιο σέρβις διατίθεται μόνο στα αγγλικά.
  • Page 12 • Ikke forsøk å reparere utstyret uten at denne servicehåndboken er lest og forstått. • Manglende hensyn til denne advarselen kan føre til at serviceleverandøren, operatøren eller pasienten skades på grunn av elektrisk støt, mekaniske eller andre farer. GE Healthcare 32551-IMG rev 6...
  • Page 13 обязательно обратитесь к данному руководству и поймите изложенные в нем сведения. • Несоблюдение требований данного предупреждения может привести к тому, что специалист по техобслуживанию, оператор или пациент получит удар электрическим током, механическую травму или другое повреждение. 32551-IMG rev 6 GE Healthcare...
  • Page 14 • Eğer müşteri teknisyeni bu kılavuzu ingilizce dışında bir başka (TR) lisandan talep ederse, bunu tercüme ettirmek müşteriye düşer. • Servis kılavuzunu okuyup anlamadan ekipmanlara müdahale etmeyiniz. • Bu uyarıya uyulmaması, elektrik, mekanik veya diğer tehlikelerden dolayı teknisyen, operatör veya hastanın yaralanmasına yol açabilir. GE Healthcare 32551-IMG rev 6...

  • Page 15: Preinstallation Instructions

    The minimum space requirements and recommended free space around the unit are shown in figure 2.1, Space requirements. Dimensions are in millimeters (mm). To convert to inches, multiply given dimension by 0.0394 (1mm = 0.0394in). Fig 2.1. Space requirements 32551-IMG rev 6 GE Healthcare...

  • Page 16: Strength/Durability Requirements For The Wall And Floor

    20 A, 2-pole (outlet per local code requirements or NEMA 6-20) VDE Wall plug is included dedicated, wired (not conduit) Grounding 0-potential (earth) ground (220/120V/15A) required for any Standard outlet optional accessories GE Healthcare 32551-IMG rev 6...

  • Page 17: Environmental Requirements

    – Screwdrivers small/medium – Screwdrivers POZIDRIVE small/medium – Allen key set (long type 1.5 - 8 mm) – Wrench set 7 - 19 mm. – Pliers – Drilling machine with 10 mm bit for wall mounting 32551-IMG rev 6 GE Healthcare...

  • Page 18: Test Equipment Needed For Installation

    – 1150 x 230 x 200 mm (45 5/16” x 9” x 7 7/8”) – wooden – gross weight: without ECS approximately 92 kg (203 lb), with ECS approximately 104 kg (230 lb) – counterweight (with or without additional counterweight for ECS) GE Healthcare 32551-IMG rev 6...

  • Page 19: Unpacking The Column With The Carriage

    – remove the carriage locking bracket lift out the column and carriage – lay the column down with the c-arm axle against the floor. Be careful with the cables coming out not to damage them 32551-IMG rev 6 GE Healthcare...
  • Page 20 2 Preinstallation instructions Fig 2.2. Column with carriage NOTE! The crate includes the packing list. Make sure that you have received all items. GE Healthcare 32551-IMG rev 6...

  • Page 21: Unpacking The C-Arm

    – unscrew Phillips screws – open the fastened cover – remove the spacing boards and lay them next to the crate – turn the crate over onto the spacing boards – lift the empty crate off the counterweight 32551-IMG rev 6 GE Healthcare...

  • Page 22: Unpacking The Accessories

    – open the fastened cover 2.14 U NPACKING THE BASE PLATE – cut the packing straps – unscrew Phillips screws – open the fastened cover – remove the support pieces Fig 2.4. Base plate packing GE Healthcare 32551-IMG rev 6...

  • Page 23: Installation

    Fig 3.1. Vertical motor and cables CAUTION! Insert the assembly pin through the holes at both sides of the column, and tape the exposed ends (or use rubber band) to prevent its sliding out. 32551-IMG rev 6 GE Healthcare...
  • Page 24 WARNING! Make sure that no articles such screws etc. can fall through to the open spaces between the column and the carriage. Serious problems for the use of the device may occur. GE Healthcare 32551-IMG rev 6...

  • Page 25: Installation Of The Column To The Wall

    3.2, Wall attachment holes (Long / short column version). Fix the enclosed plugs in the holes. 16 5/32” 410 mm Fig 3.2. Wall attachment holes (Long / short column version) 32551-IMG rev 6 GE Healthcare...

  • Page 26: Attachment Of The Column Brackets

    Attachment of the column brackets Attach the wall mount bracket and base plate to the column. See figures 3.3, Wall mount bracket and 3.4, Base plate. Fig 3.3. Wall mount bracket Fig 3.4. Base plate GE Healthcare 32551-IMG rev 6...

  • Page 27: Lifting The Column - Minimum 2 People

    Damage to the surface of the base plate can occur if the column is attempted to “walk” or slide. Move the column over to the base plate and stand it up on top of rubber bumper and the traced outline. 32551-IMG rev 6 GE Healthcare...
  • Page 28 Use for example 3 Nm tightening torque. 10 Assemble the rear cover plate C. CAUTION! The back cover plate C will not fit if the column is not in level. GE Healthcare 32551-IMG rev 6...

  • Page 29: Localized Unit Label Attachment

    Illustration examples below are provided to guide the alignment and attachment. Original unit main label Additional translated label Remove the label from the release paper. Attach the label on the unit label as instructed in images above. 32551-IMG rev 6 GE Healthcare...

  • Page 30: Installation Of The C-Arm

    Attach the four lower bolts, and tighten all six attachment bolts. Remove all carriage covers and check all internal spaces for loose hardware, packing materials. Make sure that the circuit boards and connectors are properly installed. GE Healthcare 32551-IMG rev 6...
  • Page 31 Connectors AMD X1, AMD X2 and AMD X3 are attached to the anode motor driver (AMD) board inside the C- arm (X61 is only on Alpha RT models). See Figure 3.8, C-arm connectors. NOTE! X20 has 10 wires on the Alpha RT. Fig 3.8. C-arm connectors 32551-IMG rev 6 GE Healthcare...

  • Page 32: Attachment Of The Control Panel

    The base of the control panel is attached on the right side of the unit. If desired, the base can be moved to the other side of the unit or attached to a wall. See Figure 3.10, Control panel attachment. GE Healthcare 32551-IMG rev 6...
  • Page 33 Attach the cable of the panel to the D connector at the base of the carriage. The control may be installed flat to the side of the carriage, or to an angle with the angled back piece. Fig 3.10. Control panel attachment 32551-IMG rev 6 GE Healthcare...

  • Page 34: Attachment Of The Pedals

    Swing the shield into the desired position. Loosen the shield stop and and hinge support plate lower it until it contacts the floor. Tighten the stop screws. If the wheel is used the adjustment is not needed. GE Healthcare 32551-IMG rev 6...

  • Page 35: Mains Plug Installation

    (PE) connection. A loose IEC type plug is included in the unit delivery. When connecting the wires, make sure that the yellow-green PE wire is left min 10mm longer than the two other ones. 32551-IMG rev 6 GE Healthcare...

  • Page 36: Testing The Control Functions

    Notice the cassette type: Normal or Daylight. Fig 3.14. Patient identification window in a daylight cassette allows the use of Alpha ID II or other identification system to print the patient data onto the film. GE Healthcare 32551-IMG rev 6...
  • Page 37 11 Test the vertical drive control switches on both sides of the unit and verify that up and down movements of the carriage starts slowly and then speeds up as the switch is held down. 32551-IMG rev 6 GE Healthcare...
  • Page 38 18 Verify that the typical voltages listed are present. Refer to repair instructions in service manual for the location of the test points. Voltages marked with * are unregulated. GE Healthcare 32551-IMG rev 6...
  • Page 39 C-arm is shifted. The brake can be released only if the C-arm is in the lowest position (the photo interrupter has entered the slot and the microswitch on the side of the ECS mechanism is activated). 32551-IMG rev 6 GE Healthcare...
  • Page 40 See that the c-arm movement stops as well. 10 Make an exposure and see that the c-arm is returned to the lowest position after the exposure if the Autorel function is selected on the Alpha RT control panel. GE Healthcare 32551-IMG rev 6...
  • Page 41 12 Press REL pedal to set movements to start position. Press ECS-pedal and adjust the speed from R37 until the dimension between floor level and compression paddle does not change. 13 Press the C-ARM-pedal and adjust the C-arm speed from R59 to about 1cm/1sec. 32551-IMG rev 6 GE Healthcare...
  • Page 42 3 Installation GE Healthcare 32551-IMG rev 6...

  • Page 43: Alpha Rt Softstart Procedure

    Serious problems for the use of the device may occur. EMOVAL OF THE SIDE COVERS Remove the side and back covers to expose the circuit boards. CAUTION! Do not pull out the side cover, just straight down. CAUTION! Side cover tabs are sharp. 32551-IMG rev 6 GE Healthcare...

  • Page 44: Removal Of The Top Cover

    Removing the top cover by opening the four screws EMOVAL OF THE BOTTOM COVER Remove the bottom cover of the C-arm to expose the high voltage unit. Fig 4.3. Removing the bottom cover by opening the four screws GE Healthcare 32551-IMG rev 6...

  • Page 45: Removal Of The

    X4 on the FILAMENT CONTROL board. Set the test switch S1 on the INVERTER board to “NORMAL” position. – Set the jumper X8 on the FILAMENT CONTROL Board to 2-3 position (right-hand position). 32551-IMG rev 6 GE Healthcare...

  • Page 46: Transformer Voltage Tapping

    After this check that the anode motor plate stops running (listen to the sound of the rotating anode) and that no error messages are displayed on Control Panel timer-screen. If this is not the case, perform step 3. GE Healthcare 32551-IMG rev 6...
  • Page 47 Check also that on the INVERTER Board, the LEDs H2, H4, H5, H6, H7, H11 and H12 and on the FILAMENT CONTROL board, the LEDs H2, H4, H5, H6 and H7, turn on during the exposure. 32551-IMG rev 6 GE Healthcare...

  • Page 48: Preheat And Ma-Regulation Check

    R96. Be careful with preheat adjustment. Turn the potentiometer little by little and check that scope figure will look as in Figures 4.7, Correct preheat, 4.8, Preheat rises too fast "Overshoot" and 4.9, Preheat rises too slow. GE Healthcare 32551-IMG rev 6...
  • Page 49 4 Alpha RT softstart procedure CAUTION! Too slow a rise time will result in an E.01 error message. Fig 4.7. Correct preheat Fig 4.8. Preheat rises too fast "Overshoot" 32551-IMG rev 6 GE Healthcare...

  • Page 50: Kv- Regulation Check

    Make an exposure and check the voltage from the DVM during exposure. It should be 2.8±0.01Vdc. If not, adjust from trimmer potentiometer R63. NOTE! kV is set at the factory. For calibration use Unfors, RTI, PMX-I/M or similar GE Healthcare 32551-IMG rev 6...
  • Page 51 4 Alpha RT softstart procedure Fig 4.10. Inverter board 32551-IMG rev 6 GE Healthcare...
  • Page 52 4 Alpha RT softstart procedure GE Healthcare 32551-IMG rev 6...

  • Page 53: Setups, Alignments And Adjustments

    Mo and Rh filters separately. The target time depends on the compressed breast thickness and is a linear curve calculated from two programmed points. 32551-IMG rev 6 GE Healthcare...

  • Page 54: Setup Info Printout And Printer/Pc Connection #62 Inf

    8-bit data 1 stop The data can be received with a communications program, for example Windows (Hyper)Terminal, to PC and printed afterwards on paper, or a printer can be directly connected to the port. GE Healthcare 32551-IMG rev 6...
  • Page 55 23 23 23 23 23 23 24 24 24 25 25 25 26 26 26 27 27 27 28 28 23 23 23 23 23 23 24 24 24 25 25 25 26 26 26 27 27 27 28 28 EPROM CHECKSUM: Calc = 05925 Set = 05925 32551-IMG rev 6 GE Healthcare...

  • Page 56: Service Menu Program #52 Sup

    29. Row 3 contains positions 30 through 44 and row 4 positions 45 through 59. See following the ASCII table and a Label Programming Worksheet. #52SUP/C A additional compression force with pedal (ON/OFF) set values (6) for compression force GE Healthcare 32551-IMG rev 6...
  • Page 57 ß " é ó â ú & ä ñ à Ñ & å ç ê ë è ï î ì Ä Å É æ " Æ Table 5.2 ASCII code and corresponding alphanumerical letter table 32551-IMG rev 6 GE Healthcare...
  • Page 58 ÿ ° Ö Ü < > Table 5.2 ASCII code and corresponding alphanumerical letter table Position Text ASCII Position Text ASCII Position Text ASCII Position Text ASCII Table 5.3 Customized label programming sheet Press kV+ GE Healthcare 32551-IMG rev 6...

  • Page 59: Service Menu Program #53 Par

    #53PAr/S The density display shows S, which means the Serial Number of the Unit. Check that it equals the serial number on the label under the image receptor support. If not, correct using the density- and density+ buttons. Press kV+ 32551-IMG rev 6 GE Healthcare...
  • Page 60 Efficiency (mR/mAs) of the tube at 25 kV for the filter selected. Number 115 in the display means 11.5 mR/mAs. If the filter button is pressed, the mR/mAs value for the other filter is displayed. Press kV+ GE Healthcare 32551-IMG rev 6...
  • Page 61 1 for MGB-500 Collimator (with interlock) 0 for MGB-400 Collimator (no interlock) Press kV+ #53PAr/d C-arm control board selection 0 = C-arm control board (32310) 1 = CD-board (32010) Press Autoexp to leave the PAr program. Press kV+ 32551-IMG rev 6 GE Healthcare...

  • Page 62: Service Menu Program #64 Aec

    40 mm acrylic. Use Den+/Den- buttons to select the kV value. Press kV+ CAUTION! Perform following programming after the AEC has been adjusted and then the density & default values have been selected and programmed. GE Healthcare 32551-IMG rev 6...
  • Page 63 #64AEC/g The density display shows g. This is the software AEC gain parameter. It is used for adjusting the basic optical density (usually for Bucky molybdenum). refer to section AEC adjustment. CAUTION! The gain affects all cassette holder/filter combinations. Press kV+ 32551-IMG rev 6 GE Healthcare...
  • Page 64 Press Autoexp to leave the AEC program and to enter the special program menu. NOTE! If the factory default setting is changed, use the table below to store the new values. CAUTION! Always drive the compression paddle from 00cm up when reprogramming the initial kV. GE Healthcare 32551-IMG rev 6...
  • Page 65 5 Setups, alignments and adjustments INITIAL KV TABLE Thickn. Cass. Cass. Bucky Bucky Magn. Magn. display tunnel tunnel default Default default values values values values values values Mo and Mo and Mo and Table 5.4 Initial kV table 32551-IMG rev 6 GE Healthcare...

  • Page 66: Service Menu Program #65 Tar

    (= aimed exposure time). The target time depends on the compressed breast thickness and is linear curve calculated from two programmed points. See a graph below. GE Healthcare 32551-IMG rev 6...
  • Page 67 NOTE! The Target time is separately adjusted for Mo/Rh and Bucky/Magn/ Cassette tunnel. Press Autoexp to exit the program. Pressing autoexp during programming (steps 3-4) returns the program to step 1 without accepting new values. 32551-IMG rev 6 GE Healthcare...

  • Page 68: Error And Exposure Counters (Pr#58 Cec)

    Adjustment procedure during the installation NOTE! REPORTS TO BE RECORDED IN U.S.A. ONLY: Record all requested data according to the installation report enclosed. Complete the FDA form 2579(3/89) according to the DHR report guide sheet 37139-IMG enclosed. GE Healthcare 32551-IMG rev 6...

  • Page 69: Alignment & Adjustment

    Subtract the density value of the step below, from the density value of the step above the speed index step. This result is the contrast index. Record this on the film and in Table 5.5, Film processor evaluation. 32551-IMG rev 6 GE Healthcare...

  • Page 70: C-Arm Brake Adjustment

    If the brake does not release properly, open the nuts (1) and adjust the space (4) with the screws (2). The space should be about 0.1 to 0.4 mm. CAUTION! Make only minor adjustments of the nyloc nuts - measured by the flats of the nuts. GE Healthcare 32551-IMG rev 6...
  • Page 71 5 Setups, alignments and adjustments Fig 5.2. Magnetic brake 32551-IMG rev 6 GE Healthcare...

  • Page 72: C-Arm Angle Display Calibration (Pr#54 Can)

    Press Autorel; the 50N level is now programmed. The kV and mAs display shows now “to 200”. Make a compression of exactly 200 N (20kg). If another maximum compression force is used, change the 200 N on the display with the +/- density buttons. GE Healthcare 32551-IMG rev 6...

  • Page 73: Compression Thickness Display Calibration (Pr#56 Cth)

    60-mm display can be changed from the Density+/- buttons. Press Autorel. Use proper (40-50 N) compression with the acrylics. Otherwise a wrong thickness reading will affect clinical use. NOTE! This calibration has to be made for each cassette holder, magnification, and bucky. 32551-IMG rev 6 GE Healthcare...

  • Page 74: Compression Force And Speed Adjustment With Ecs

    R33 (clockwise to increase). CAUTION! When changing the maximum force, keep the external knob on maximum position and when changing the minimum force, keep external knob on minimum position. Fig 5.6. Adjustments on the C&Z Driver board 33035-IMG GE Healthcare 32551-IMG rev 6...
  • Page 75 (see table). – Change subparameter value by pressing Density+ and Density- buttons. mAs-screen indicates the value for default setting 1-6 in newton units. – Accept values pressing Autoexp, exit to main menu. 32551-IMG rev 6 GE Healthcare...
  • Page 76 If needed, use customer’s own reference when adjusting forces. Adjust limit values to comply with reference system. Compression minimum force limit is not recommended to adjust to be less than 8 kg (16lbs.). See appendix Software Block diagram. GE Healthcare 32551-IMG rev 6...

  • Page 77: The Mechanical Compression Limit

    Remember to seal the screw after adjustment. Sliding bars clearance To ensure smooth sliding of the compression mechanism, the sliding bars need to have some clearance. The clearance is adjusted with the screw in the bar end. 32551-IMG rev 6 GE Healthcare...
  • Page 78 5 Setups, alignments and adjustments Mechanical clutch adjustment Sliding bar clearance adjustment Fig 5.8. Compression mechanism GE Healthcare 32551-IMG rev 6...

  • Page 79: Kv, Mas And Exposure Time Test

    ± ( 0.1 second + instrument inaccuracy ) = ± ( 0.1 second + 0.25 msec + 0.5 % of reading kV adjustment kV can be adjusted from R 63 located on the Inverter Board. See figure 4.10, Inverter board. 32551-IMG rev 6 GE Healthcare...

  • Page 80: Light Field Intensity Adjustment

    Make an exposure and develop the film. The exposed area between the ruler and the chest wall edge of the film must be less than 6 mm and more than 1 mm in USA, less than 3 mm and more than 0 mm in Europe. GE Healthcare 32551-IMG rev 6...

  • Page 81: Light Field Alignment

    10 mm. Light field correction for 12V 50W bulb Loosen screws A and move the mirror B until the light field is adjusted. See Fig. 5.11, Light field alignment. 32551-IMG rev 6 GE Healthcare...

  • Page 82: Grid Alignment And Speed Adjustment (Pr#61 Buc)

    Attach the bucky and enter the program by pressing Autoexp. Press the exposure button to run the grid. The timer display shows the grid turn-around time which cannot be adjusted. The mAs display shows the adjustable grid travel time from side to side. GE Healthcare 32551-IMG rev 6...

  • Page 83: Aec Adjustment

    (which was selected according the breast thickness) during exposure. Select the internal density correction factor within a range of 50% to 200% (0.50 on screen means 50% and 2.00 on mAs-screen means 200% change to exposure time). The default value is 1.00. 32551-IMG rev 6 GE Healthcare...
  • Page 84 13 Press Autoexp. Select Rhodium filter and repeat the settings (steps 3 to 13). Attach the cassette tunnel. Repeat instructions from 3 to 13 for cassette tunnel. Attach the magnification tunnel. Repeat instructions from 3 to 13 for cassette tunnel. GE Healthcare 32551-IMG rev 6...
  • Page 85 7.27 or later, you work at start up. can remove the capacitor C35 (22µF). “white images”. O.fl, U.fl or C.cn Check the bucky error code. connection (apply compression). Table 5.7 AEC adjustment quick fix guide 32551-IMG rev 6 GE Healthcare...
  • Page 86 C.holder A (27kV) Mag. A (27kV) Mag. A (27kV) Mag. A (27kV) Bucky (27kV) (12mAs) manual mode Cassette (27kV) (12mAs) manual holder mode Magn. (27kV) (12mAs) manual mode Table 5.8 Alpha RT settings for Molybdenum filter GE Healthcare 32551-IMG rev 6...
  • Page 87 C.holder A (27kV) Mag. A (27kV) Mag. A (27kV) Mag. A (27kV) Bucky (27kV) (12mAs) manual mode Cassette (27kV) (12mAs) manual holder mode Magn. (27kV) (12mAs) manual mode Table 5.9 Alpha RT settings for Rhodium filter 32551-IMG rev 6 GE Healthcare...

  • Page 88: Adjusting The Aec Board

    Each value is displayed for 1 second. The first value represents the integration time (in ms), the second is AEC frequency (for example 320=32kHz) and the last value is base frequency (for example 004=40Hz). GE Healthcare 32551-IMG rev 6...

  • Page 89: Adjusting The Optical Density (=O.d)

    Alter the AEC Gain parameter ‘g in the service program #64 to 1.10, reload the cassette with a new film and make a new exposure. Develop the film and mark the optical density of the film (=O.D) to the graph next page. 32551-IMG rev 6 GE Healthcare...
  • Page 90 Mark the points to the O.D vs. exposure time graph. Draw a line through the three points. They should form a horizontal line within ±0.15 O.D. If they do not, a thickness compensation will be required. GE Healthcare 32551-IMG rev 6...

  • Page 91: Thickness Compensation Adjustment

    DO NOT change the gain parameter anymore. Use the density correction (in Pr mode) to bring O.D. to same level with other filter/cassette holder combinations. Fine tuning of the thickness compensation NOTE! Fine tuning is optional and may only have minor effect to compensation. 32551-IMG rev 6 GE Healthcare...

  • Page 92: Kv Compensation

    The Control Panel will display: – kV screen of the Control Panel: current kV selected – Density Correction on mAs-screen of the control panel: + 1.00 (default) Adjust for each station (a, b, c) in both modes. GE Healthcare 32551-IMG rev 6...

  • Page 93: Density Programming

    Install the magnification tunnel. Repeat the instructions 3. and 4. Change the rhodium filter Repeat the instructions 2. - 6. NOTE! In order to enter the Program (Pr) mode, press Density+ and Density- buttons simultaneously. 32551-IMG rev 6 GE Healthcare...
  • Page 94 5 Setups, alignments and adjustments GE Healthcare 32551-IMG rev 6...

  • Page 95: Alpha Rt Installation Step By Step

    5.8, Alpha RT settings for Molybdenum filter and 5.9, Alpha RT settings for Rhodium filter. Select program #62 INF and press Autoexp to print the programmed values. OFTWARE BLOCK DIAGRAM See appendix. 32551-IMG rev 6 GE Healthcare...
  • Page 96 6 Alpha RT installation step by step GE Healthcare 32551-IMG rev 6...
  • Page 99 General Electric Company reserves the right to make changes in specification and features shown herein, or discontinue the product described at any time without notice or obligation. Contact your GE representative for the most current information. Copyright © 2010 by General Electric Company Inc. All rights reserved.

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