OEC 9800 Periodic Maintenance Procedure

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General Instructions ......................................................................................................................................................4

Safety ...........................................................................................................................................................................4

Ingress Of Water And Solutions ................................................................................................................................4

Unauthorized Modifications .......................................................................................................................................5

Motorized Mechanical Operation ...............................................................................................................................5

Trained Service Personnel ........................................................................................................................................5

Electrical Shock.........................................................................................................................................................5

X-radiation Exposure .................................................................................................................................................6

Required Tools, Test Equipment, and Specifications ...................................................................................................7

Tools..........................................................................................................................................................................7

Test Equipment .........................................................................................................................................................7

Paint Kits ...................................................................................................................................................................8

Miscellaneous............................................................................................................................................................8

The PM Form................................................................................................................................................................9

PM Form Information.................................................................................................................................................9

Beginning the PM Form.............................................................................................................................................9

Remove Power and Covers.....................................................................................................................................10

Safety Inspections .......................................................................................................................................................13

Mechanical Inspections ..............................................................................................................................................13

Brakes .....................................................................................................................................................................13

Wheels/Casters .......................................................................................................................................................14

Non-Motorized Movements .....................................................................................................................................14

Inspect Static Drag Wire..........................................................................................................................................15

FluoroTrak Articulating-Arm (Option)....................................................................................................................16

Electrical Inspections ..................................................................................................................................................17

Electrical Plug/Power Cord......................................................................................................................................17

Interconnect Cable And Pins ...................................................................................................................................17

Ground Continuity ...................................................................................................................................................17

Contents

Installation

Service

Schematics

Periodic Maintenance

Illustrated Parts

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Summary of Contents for OEC 9800 Periodic

Page 1: Table Of Contents
OEC 9800 Periodic Maintenance Procedure Contents General Instructions ..............................4 Safety ...................................4 Ingress Of Water And Solutions ..........................4 Unauthorized Modifications ............................5 Motorized Mechanical Operation ..........................5 Trained Service Personnel ............................5 Electrical Shock.................................5 X-radiation Exposure ..............................6 Required Tools, Test Equipment, and Specifications ....................7 Tools..................................7...
Page 2 OEC 9800 Periodic Maintenance Procedure Power Supplies & Battery Inspections ........................19 Power ON ...................................19 Incoming Line Regulation ............................19 Line Regulation ...............................19 Isolation Transformer, Secondary Output........................21 DC Power Supplies..............................22 Workstation ................................22 C-ARM POWER SUPPLIES............................26 Generator Batteries ..............................28 Fan Operation and Filter Cleaning..........................28 Workstation Fans and Air Filters ..........................29...
Page 3 OEC 9800 Periodic Maintenance Procedure Fluoroscopic Accuracy..............................46 Fluoroscopic kVp Accuracy @ 1 mA ........................46 Fluoroscopic kVp Accuracy @ Maximum mA......................47 Miscellaneous ................................48 Dose Area Product Calibration ...........................48 Calculate Coeffecients.............................48 Calculate Rotation Calibration Constants ........................49 Battery Replacement ..............................52 PCB Batteries................................52 FluoroTrak UPS Battery Replacement ........................53 Completing the PM ..............................54...
Page 4: General Instructions
OEC 9800 Periodic Maintenance Procedure General Instructions Use this procedure in conjunction with the OEC 9800 Periodic Maintenance (PM) Inspection Report form. Enter the required information at the top of the form prior to performing the PM test procedures. Read the “Safety” section.
Page 5: Unauthorized Modifications
All GE OEC systems comply with International Electrotechnical Commission safety standard IEC-60601. Do not connect any external device to the system that does not meet the requirements of IEC-60601. Only devices provided or approved by GE OEC Medical Systems, Inc. should be connected to the system. Motorized Mechanical Operation The Vertical Column is motorized and should be observed continuously during operation to avoid collision with people and equipment.
Page 6: X-Radiation Exposure
OEC 9800 Periodic Maintenance Procedure WARNING: After taking X-rays, the high voltage cables can retain a lethal charge, even if you power down the system. Even though the contacts are recessed, high voltages can arc several inches from their terminals if the cables are removed from the connector wells. Use caution when disconnecting high voltage cables even when the power is turned off.
Page 7: Required Tools, Test Equipment, And Specifications
OEC 9800 Periodic Maintenance Procedure Required Tools, Test Equipment, and Specifications Tools In addition to common hand tools, the following tools are required: • Torx Screwdriver Set • Spline Driver, .048, P/N 00-900920-01 Test Equipment • Oscilloscope Tektronix 2236 or equivalent •...
Page 8: Paint Kits
OEC 9800 Periodic Maintenance Procedure • 12″ Beam Alignment Tool, P/N 00-878867-01 • kVp meter • Lead Blocker (P/N 00-900041-01) Paint Kits Part Number Description 900524-11 Paint Kit, Elite Gray, Texture 900524-12 Paint Kit, Rhinestone, Texture 900524-13 Paint Kit, Windswept, Texture Miscellaneous •...
Page 9: The Pm Form
The PM Form PM Form Information ® The 9800 Periodic Maintenance Form has been designed using the Microsoft Word 97 form tool and should be completed on-line. The on-line form contains three types of information fields: text/number fields, checkboxes and pull- down menus.
Page 10: Remove Power And Covers
OEC 9800 Periodic Maintenance Procedure 9. Record the equipment calibration due date on the PM Inspection Form. Remove Power and Covers WARNING: Electrical circuits inside the equipment use voltages that are capable of causing serious injury or death from electrical shock. Use appropriate precautions.
Page 11 OEC 9800 Periodic Maintenance Procedure Figure 1. Removing the Workstation Covers Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
Page 12 OEC 9800 Periodic Maintenance Procedure 3. Remove the C-Arm’s front cover first and then the right cover and left cover. 4. Remove the screws from the C-Arm’s rear cover and then loosen the 2 upper set screws on the steering shafts’...
Page 13: Safety Inspections
OEC 9800 Periodic Maintenance Procedure Safety Inspections When performing a semi-annual PM perform the Safety Inspections section, Power Supplies and Battery Inspections section, Functional Inspection section, and Completing the PM section. When performing an annual PM perform all sections. Mechanical Inspections Brakes 1.
Page 14: Wheels/Casters
OEC 9800 Periodic Maintenance Procedure Wheels/Casters 1. Push the C-Arm and verify that the wheels roll smoothly, the casters turn freely and that the wheels are securely attached to the casters. Visually inspect the wheels for damage. 2. Push the Workstation and verify that the wheels roll smoothly without vibration and that they are securely attached to the casters.
Page 15: Inspect Static Drag Wire
OEC 9800 Periodic Maintenance Procedure Orbital Rotation a.k.a. C-arm rotation Perform the following to verify orbital rotation for standard C-arms and Super C-arms: 1. On Standard C-arms, release the L-Arm brake and check C-arm rotation in the following positions: a. Position the C-arm parallel with the floor and lock the L-Arm brake. Rotate the C-arm through its entire range.
Page 16: Fluorotrak Articulating-Arm (Option)
OEC 9800 Periodic Maintenance Procedure FluoroTrak    Articulating-Arm (Option) 1. Verify that the articulating-arm mechanics move freely and smoothly throughout the entire range of motion. Adjust the articulating arm’s friction brake if necessary. 2. Verify that the articulating-arm mechanics have negligible mechanical drift. Adjust the friction brake and/or mechanical assemblies if necessary.
Page 17: Electrical Inspections
OEC 9800 Periodic Maintenance Procedure Electrical Inspections Electrical Plug/Power Cord 1. Inspect the Workstation’s AC power cable for damage and wear. Verify the presence of the AC ground pin. Interconnect Cable And Pins 1. Inspect the interconnect cable; verify that the cable, C-Arm connector, and pins are not damaged. Verify the LEMO connector strain relief is tightened securely.
Page 18 OEC 9800 Periodic Maintenance Procedure RED INDEX MARK ABOVE PIN 12 Figure 3. J1 Interconnect Cable Pin-out 3. Connect the Interconnect Cable to the C-Arm and verify continuity between the following: From Spec < 0.5 Ω C-Arm Second Earth Ground (Bottom...
Page 19 OEC 9800 Periodic Maintenance Procedure Power Supplies & Battery Inspections Power ON WARNING: Observe safety procedures when operating motorized features. 1. Plug the AC power cord into the wall receptacle. 2. Turn the C-Arm keyswitch to the on position, fully clockwise.
Page 20 OEC 9800 Periodic Maintenance Procedure Table 1 (100 – 127 VAC) If the primary of The WHT/BLU The BRN wire The BLU wire wire should be should be should be WHT/BRN T1 voltage connected to connected to connected to wire should...
Page 21 OEC 9800 Periodic Maintenance Procedure 4. Measure the line voltage at the wall receptacle again (voltage loaded = Vl) while making a radiographic exposure (300 mAs @ 100 kVp). 5. Calculate the percentage line voltage regulation using the following formula and record the results on the PM Inspection Report form: −...
Page 22 OEC 9800 Periodic Maintenance Procedure DC Power Supplies WARNING: Electrical circuits inside the equipment use voltages that are capable of causing serious injury or death from electrical shock. Use appropriate precautions. Workstation 12345678 +ve -ve 5V ADJ Figure 4. Location of PS1 - 5V Adjustment...
Page 23 OEC 9800 Periodic Maintenance Procedure System Power Supply (PS1) and Fan 1. On the DC Distribution PCB (P/N 879119) verify the following voltages: Adjust Tolerance ± 0.1 PS1 +5v +5.1 ± 0.1 +3.3 ± 0.4 ± 0.4 2. Verify that the LEDs on the DC Distribution PCB are ON.
Page 24 OEC 9800 Periodic Maintenance Procedure DS10 +5.0 Display Controller PCB DS11 +3.3 Display Controller PCB DS12 +3.3 CINE Bridge PCB DS13 +5.0 CINE Bridge PCB DS14 +5.0 Control Panel Processor DS15 +12.0 Control Panel Processor 3. On the Image Processor PCB (P/N 879018) verify the following voltages and record the values on the PM Form:...
Page 25 OEC 9800 Periodic Maintenance Procedure 4. Measure the AC power on the power strip (TB4) located below the monitors and record the values on the PM Form: From Tolerance ± 5.0 TB4-5 TB4-3 ± 5.0 TB4-5 TB4-9 < 80 TB4-5 ±...
Page 26 OEC 9800 Periodic Maintenance Procedure C-ARM POWER SUPPLIES PS1 (located behind power panel) 1. Remove the screw holding the power panel door in place and swing the door open on its hinge. Verify the following voltages on connector J2 and record the values on the PM Form:...
Page 27 OEC 9800 Periodic Maintenance Procedure 1. Measure the voltages on the following power supply test points and record the values on the PM Form: Note: The voltage designations on the Power Supply PCB are incorrect. Adjust the voltages to the value described in the following table.
Page 28 OEC 9800 Periodic Maintenance Procedure Generator Batteries This procedure can be used to verify that a fully charged set of battery packs is performing adequately. WARNING The following steps produce X-rays. Use appropriate precautions. 1. In FILM mode, set the technique for 75 kVp @ 200 mAs.
Page 29 OEC 9800 Periodic Maintenance Procedure Workstation Fans and Air Filters MONITOR FANS (1 EACH SIDE) ELECTRONIC BOX FANS (1 EACH SIDE) Figure 5. Location of Workstation Fans and Air Filters Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
Page 30 OEC 9800 Periodic Maintenance Procedure MONITOR FILTER (1) POWER SUPPLY FAN (1) REAR WORKSTATION FAN (FILTER ON REAR COVER) Figure 6. Location of Workstation Fans and Air Filters Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
Page 31 OEC 9800 Periodic Maintenance Procedure Back Panel Fan and Filter 1. Verify that the main inlet fan is operational and that air flow is directed into the Workstation. 2. Inspect the main inlet fan air filter attached to the rear cover. Remove and clean if necessary.
Page 32 OEC 9800 Periodic Maintenance Procedure C-Arm Fans and Air filters The C-Arm has fans in the following locations POWER SUPPLY X-RAY TUBE COOLING FAN (option) HV TANK FAN Figure 7. Location of C-Arm Fans and Filters Contents Installation Service Schematics...
Page 33 OEC 9800 Periodic Maintenance Procedure Multi-Power Power Supply Fan 1. Verify that the fan that cools the power supply is operating. HV Generator Fan 1. Verify that the fan that cools the High Voltage (HV) Generator Tank is operating. X-Ray Tube Cooling Fan (option) This procedure is applicable only if the system has been equipped with an X-ray Tube Cooling Kit.
Page 34 OEC 9800 Periodic Maintenance Procedure SIDE FILTER FILTER AIR FILTER (Flat View) AIR FILTER (Flat View) BOTTOM FILTER AIR FILTER HV CABLE COVER STANDARD C-ARM HV CABLE COVER SUPER C-ARM Figure 8. HV Cable Cover Filters for Standard C-Arm & Super C-Arm...
Page 35 OEC 9800 Periodic Maintenance Procedure Functional Inspection C-Arm Controls WARNING: Some of the following procedures produces X-rays. Take appropriate precautions. 1. Press the X-ray on switch and verify the following Image Orientation functions: a. Image rotation key rotates the image clockwise and counter-clockwise.
Page 36 OEC 9800 Periodic Maintenance Procedure Note: If your C-Arm's collimator is equipped with one leaf then the graphical icon displayed on the Workstation monitor will be a single line. a. Press the COLLIMATOR IRIS OPEN/CLOSE switch and verify that a graphical icon (circle) displays on the Workstation monitor and that the size of the circle varies as the iris is opened and closed.
Page 37 OEC 9800 Periodic Maintenance Procedure a. Cover the II with the lead blocker (P/N 00-900041-01) and press the right Foot/handswitch. b. Verify that the audible tone beeps at twice the normal rate. c. Verify that the mA is driven higher than the Fluoro limit of 5 mA.
Page 38 OEC 9800 Periodic Maintenance Procedure 16. Low Dose mode operation: a. Press the Low Dose key. The corresponding LED will illuminate when Low Dose mode is selected. b. Press the Low Dose key again to deselect Low Dose mode. The corresponding LED will extinguish.
Page 39 OEC 9800 Periodic Maintenance Procedure 3. Verify the ZOOM function displays a square box known as the Region Of Interest (ROI) and that you can magnify the ROI by touching the 2X and 4X buttons. 4. Verify the NEGATE function reverses the light and dark values on the image displayed on the left monitor.
Page 40 OEC 9800 Periodic Maintenance Procedure High Capacity Disk Test 1. Using the Image Directory verify that dynamic and static image(s) can be saved to disk. VCR Test 1. Verify the VCR RECORD function. 2. Verify the VCR PLAY function. IR Transmitter test 1.
Page 41 OEC 9800 Periodic Maintenance Procedure Thermal Printer Test 1. Verify an image can be printed to the thermal printer. DICOM 1. Make electrical connections. Refer to the Operator Manual Supplement if necessary. 2. Verify images can be archived and printed via the DICOM interface.
Page 42 OEC 9800 Periodic Maintenance Procedure Radiographic Beam Alignment Test Film Exposure The Radiographic Beam Alignment Test requires the exposure and development of a film. Record all measurements taken in this procedure on the PM Form. WARNING: The following steps produce X-rays. Use appropriate safety precautions.
Page 43 OEC 9800 Periodic Maintenance Procedure Centering Using the film and a ruler, verify the center of the image is centered on the sheet of film (X = Sum. Record offset offset the values measured and calculated on the PM Form. Verify that the Sum is < 16 mm (13/16”) or 2% SID.
Page 44 OEC 9800 Periodic Maintenance Procedure 3. Calculate the absolute value of the difference between the film and Workstation X axis values (X – X Film Fluoro Diff Verify that the difference recorded is less than 28 mm (3% SID). 4. Calculate the absolute value of the difference between the film and Workstation Y axis values (Y –...
Page 45 OEC 9800 Periodic Maintenance Procedure Dose Rate Entrance exposure is the amount of radiation available at the entrance point of patient anatomy. Entrance exposure is measured 12" (or 30 cm) above the surface of the Image Intensifier in the center of the X-ray beam. This measurement is used to represent the average thickness of patient anatomy.
Page 46 OEC 9800 Periodic Maintenance Procedure X-RAY Generator Accuracy Tests (Annual PM) These tests measure the kVp accuracy of the system. WARNING: The following steps produce X-rays. Use appropriate precautions. Radiographic Accuracy Set the system to FILM mode. Use a kVp meter. Tolerance (± (5% or 3 kVp) greater of the two) Radiographic kVp Accuracy @ 50 mas 1.
Page 47 OEC 9800 Periodic Maintenance Procedure Fluoroscopic kVp Accuracy @ Maximum mA 1. Set the mA technique to the maximum possible setting for each kVp value. Take exposures at 60, 90 and 120 kVp and record the values on the PM form.
Page 48 OEC 9800 Periodic Maintenance Procedure Miscellaneous Dose Area Product Calibration The DAP Calibration procedure is performed by RUT software. In order for software to accurately calculate the Dose Area Product (DAP) three coefficient values must be determined first. To determine the coefficient values you must measure the dose rate in mR/s for 6 kVp settings (40, 50, 60, 80, 100, 120).
Page 49 OEC 9800 Periodic Maintenance Procedure 11. Adjust the technique to 40 kVp @ 5 mA and take an exposure. Note: Allow the readings on the dosimeter to stabilize for a few moments. 12. Read the dose rate on the Dosimeter, divide it by the mA (5 mA) and enter the value calculated into the corresponding dose rate field.
Page 50 OEC 9800 Periodic Maintenance Procedure Note: If the number of collimator leaves selected is 2 then the Calculate Constants command button on the Dose Area Product Calibration form will be grayed out and unavailable. 1. Calculate coefficients prior to performing this procedure.
Page 51 OEC 9800 Periodic Maintenance Procedure 7. Click on the first Iris Pos. number. 8. Click on the Drive Iris To command button, to drive the iris to the position selected. You should not be able to see the iris in the image when an X-ray is taken.
Page 52 OEC 9800 Periodic Maintenance Procedure 18. Repeat the previous step for the remaining Iris Positions and when you have filled in all of the Dose Rate fields, click on the Calculate Constants command button. 19. After the constants have been calculated click on the File pulldown menu and click on Download DAP data.
Page 53 OEC 9800 Periodic Maintenance Procedure FluoroTrak UPS Battery Replacement 1. Remove power to the Workstation by placing the Power switch in the off position. 2. Loosen the four knobs securing the cover on the Navigation Computer and remove the cover.
Page 54 OEC 9800 Periodic Maintenance Procedure Completing the PM Reinstall the Covers When all necessary steps are complete and access to components beneath the covers is no longer required, reinstall all previously removed covers in reverse order from which they were removed.
Page 55 OEC 9800 Periodic Maintenance Procedure Torx Screw Size Nominal Torque value Acceptable Range 4-40 6 lbs./in 5-8 lbs./in 6-32 15 lbs./in 13-16 lbs./in 8-32 22 lbs./in 21-24 lbs./in 10-32 30 lbs./in 28-31 lbs./in Test the Steering 1. With the C-Arm's wheel brake engaged, turn the right steering handle 90° to the left and right. Verify that the wheels move 90°...
Page 56 3. Obtain the customer’s signature. 4. Make two photocopies of the PM Form. 5. Mail the copy with the original signature to GE OEC Medical Systems, Inc. 6. Leave a copy with the customer. 7. Keep one copy for your records.

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