OEC 9800 Periodic Manual

OEC 9800 Periodic Maintenance Procedure
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Service Periodic Maintenance
Contents Schematics Illustrated PartsInstallation
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
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

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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
C-Arm Fans and Air filters .......................................................................................................................................32
Functional Inspection..................................................................................................................................................35
C-Arm Controls...........................................................................................................................................................35
Workstation Controls ..................................................................................................................................................38
Keyboard Controls...................................................................................................................................................38
Options....................................................................................................................................................................39
Radiographic Beam Alignment Test ...........................................................................................................................42
Film Exposure .........................................................................................................................................................42
50 mm x 50 mm Field Verification ...........................................................................................................................42
Centering.................................................................................................................................................................43
Normal Field Verification .........................................................................................................................................43
MAG1 Field Verification...........................................................................................................................................43
MAG2 Field Verification...........................................................................................................................................44
Pass or Fail .............................................................................................................................................................44
Dose Rate...................................................................................................................................................................45
Dose Rate (MAX. kV & mA) ....................................................................................................................................45
High Level Fluoro (HLF) ..........................................................................................................................................45
X-RAY Generator Accuracy Tests (Annual PM) ........................................................................................................46
Radiographic Accuracy...............................................................................................................................................46
Radiographic kVp Accuracy @ 50 mas ...................................................................................................................46
Radiographic kVp Accuracy @ 200 mas .................................................................................................................46

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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
Reinstall the Covers....................................................................................................................................................54
Test the Steering ........................................................................................................................................................55
Power ON ...................................................................................................................................................................55
PM Form Printing........................................................................................................................................................56

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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.
Perform the procedures in the “Preparation” section and then begin the periodic maintenance. During testing, place a
check mark next to each test completed, and (where applicable) record the measured values; if adjustments to these
values are made, note them on the form in the comments section.
Note: The numbered sections and their titles in this document correspond to those on the form.
Log all test equipment used on the form in the block near the bottom, Test Equipment Used.
Note: Test equipment must have current calibration dates. Do not use test equipment with expired calibration
stickers.
Safety
Ingress Of Water And Solutions
The system must never be operated or stored in locations where conductive fluids, like water and saline solution,
might spill on the equipment.
Always unplug the AC power cable from the wall outlet before cleaning the equipment. Do not allow water, soap, or
other liquids to drip into the equipment and cause short circuits, electric shock and fire hazards.

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Unauthorized Modifications
Under no circumstances should the safety interlock in the system be bypassed, jumpered, or otherwise disabled.
Note: 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.
If covers are removed, use extreme care when operating motorized features. Do not wear loose clothing that may be
caught by mechanical mechanisms. Keep hands and fingers clear of motorized equipment while the motors are in
operation.
Trained Service Personnel
Serious injury and property damage can result from incorrectly performed service procedures. Observe all operating
and safety procedures discussed in this document.
WARNING: Procedures should be performed by service personnel specifically trained by GE OEC Medical
Systems, Inc. to calibrate the OEC 9800 C-Arm and Workstation.
Electrical Shock
WARNING: This system can generate lethal voltages. Practice safe electrical testing procedures when
performing periodic maintenance procedures.

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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. If you remove these
connections, immediately discharge their contacts against the high voltage tank case (ground).
WARNING: Use caution when working near the batteries and their connections. Remove metal rings and
watchbands that may inadvertently come in contact with the battery terminals. Severe skin
burns could result if such metal articles were shorted across the battery terminals.
X-radiation Exposure
The X-ray tube assembly produces X-radiation when energized. Never operate this device without X-ray shielding in
place. Use lead shielding and draping to protect personnel.
WARNING: Lead aprons, radiation monitors, and appropriate radiation shields must be utilized for the
protection of all personnel in the vicinity while performing tests. Living human anatomy should
never be used as a phantom or demonstration aid. Do not produce radiation in hallways.
CAUTION: Many of the PCB's in this system contain components which are sensitive to Electro-Static Discharge (ESD).
Observe ESD safety procedures.

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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
•Digital Volt-Ohm-Meter
•Dosimeter (Keithley Model 35050, PMX II non-invasive meter or equivalent)
•C-Arm Extender Card, P/N 00-879248-01
•Ion Chamber
•Bore Sight Tool, P/N 00-879599-01
•Resolution Tool
•Probe Holding Fixture
•Lead Apron
•1 mm Copper Filter (3 each required), P/N 00-877682-01
•9800 Boot and Diagnostic Disk (software), P/N 00-876781-01
•9″Beam Alignment Tool, P/N 00-878105-01

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•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
•Alcohol Prep Pads

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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.
You can navigate the form using the tab key or by using your mouse. We recommend that you use the mouse. The
steps should be completed in a vertical order. The tab key tabs horizontally.
For text fields type in the requested information, such as hospital name, etc. For checkboxes, place the mouse cursor
on the checkbox and click. This will place an X in the checkbox. For pull-down menus choose the appropriate selection
when they are displayed and verify that it is present when you close the field.
To make the on-line PM Form template available to MS Word save the template in the Microsoft Office Template
directory.
Beginning the PM Form
1. Enter the Serial Number in the text field.
2. Enter the Start Date in the text field.
3. Read the elapsed time meter on the Workstation and enter the number on the PM Form.
4. Select whether the PM is semi-annual or annual from the pull-down menu.
5. Complete the customer information: Customer Name, Address, etc.
6. Record the equipment type on the PM Inspection Form.
7. Record the equipment model numbers on the PM Inspection Form.
8. Record the equipment serial numbers on the PM Inspection Form.

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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.
1. If the system has power applied, place the Workstation power switch in the OFF position and unplug the
Workstation's AC power cord from the wall outlet.
2. Remove the Workstation rear cover, left side cover, and open the electronic card rack rear door.

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Figure 1. Removing the Workstation Covers

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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’
compression coupler so the upper shaft is disconnected from the lower shaft and the rear cover can be removed
freely. Remove the rear cover.
Figure 2. Remove the C-Arm Covers and Disconnecting Steering Linkage

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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. Engage the Wig-Wag brake and verify that the brake prevents Wig-Wag movement.
2. Tighten the Flip Flop brake and verify that the Flip Flop does not move.
3. Engage the C-Arm Orbital brake and verify that the C-Arm does not move.
4. Engage the Horizontal Cross-Arm brake and verify that the Cross-Arm does not move.
5. Engage the L-Arm brake and verify that the L-Arm does not move.
6. Engage the C-Arm wheel brake and then attempt to push the C-Arm. The wheels should not roll.
7. Engage the Workstation's wheel brake and then push the Workstation and verify that the caster/wheel assemblies
are locked in position and do not move.

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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. Visually inspect the wheels for damage.
3. Verify that the cable pusher blades have not been damaged.
Non-Motorized Movements
Wig Wag
1. Release the Wig-Wag brake and verify that the forward mechanics move laterally approximately ±10°(20°total).
Flip Flop Rotation (Standard C-Arms only)
1. Release the Flip Flop brake and verify that the C-arm "flip-flops" through its entire range smoothly without
roughness or vibration.
Radial Rotation
Perform the following to verify radial rotation on Standard C-Arms and Super C-Arms:
1. On a standard C-Arm release the L-Arm brake and verify smooth rotation without roughness or vibration.
2. On a Super C-Arm release the radial brake and verify smooth rotation without roughness or vibration.

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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.
The C-arm should rotate smoothly without vibration.
b. Position the C-arm on the opposite side and lock the L-Arm brake. Rotate the C-arm through its entire range.
The C-arm should rotate smoothly without vibration.
c. Position the C-arm vertical to the floor, lock the L-Arm brake and rotate the C-arm through its entire range. The
C-arm should rotate smoothly without vibration.
2. On Super C-arms, release the Flip Flop brake and check C-arm rotation in the following positions.
a. Position the C-arm parallel with the floor and lock the Flip-Flop brake. Rotate the C-arm through its entire
range. The C-arm should rotate smoothly without vibration.
b. Position the C-arm on the opposite side and lock the Flip-Flop brake. Rotate the C-arm through its entire
range. The C-arm should rotate smoothly without vibration.
c. Position the C-arm vertical to the floor, lock the Flip-Flop brake and rotate the C-arm through its entire range.
The C-arm should rotate smoothly without vibration.
Horizontal Cross-Arm
1. Release the horizontal Cross-Arm brake and extend and retract the cross-arm. Verify that the cross-arm slides
smoothly through the housing without binding.
Inspect Static Drag Wire
1. Verify the drag wires underneath the C-Arm and the Workstation are securely attached, are touching the floor and
are free of dirt and debris.

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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.

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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.
Ground Continuity
WARNING: Do not perform this continuity test with the AC plug plugged into a power receptacle.
1. Verify continuity between the following:
From To Spec
Interconnect Cable J1-3 (Safety GND) AC Power Plug Ground
Pin
< 0.5 Ω
Interconnect Cable Shield (Metal
Casing)
AC Power Plug Ground
Pin
< 0.5 Ω
AC Power Plug Ground Pin Interconnect J1-9 < 0.5 Ω
AC Power Plug Ground Pin Interconnect J1-15 < 0.5 Ω

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RED INDEX MARK
ABOVE PIN 12
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
17
18
19
20
21
22
23
24
J1
Figure 3. J1 Interconnect Cable Pin-out
3. Connect the Interconnect Cable to the C-Arm and verify continuity between the following:
From To Spec
C-Arm Second Earth Ground (Bottom
left beneath Front Leg Cover)
AC Power Plug Ground
Pin
< 0.5 Ω
Workstation Equipotentiality Stud
(Underneath the bottom right side)
AC Power Plug Ground
Pin
< 0.5 Ω
4. Record only the highest resistance on the PM form.

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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.
3. Press the power switch located on the Workstation.
Incoming Line Regulation
Line Regulation
1. If the system is equipped with a 100-127 VAC power cord, measure the voltage from the BRN wire to WHT/BLU
on T1 primary.
If the system is equipped with a 200-250 VAC power cord, measure the voltage from the BRN wire to BLU on the
T1 primary.
2. Verify the transformer is strapped correctly; according to the following tables. Table 1 for voltage sources ranging
from 100-127 VAC and Table 2 for voltage sources ranging from 200-250 VAC.

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Table 1 (100 – 127 VAC)
If the primary of
T1 voltage
measures
between …
The WHT/BLU
wire should be
connected to
Primary #1
The BRN wire
should be
connected to
Primary #1
The BLU wire
should be
connected to
Primary #2
The
WHT/BRN
wire should
be
104.0 to 109.9 6 113 6 113
110.0 to 115.9 0113 0113
116.0 to 121.9 6 125 6 125
122.0 to 128.0 0125 0125
Table 2 (200 – 250 VAC)
If the primary of
T1 voltage
measures
between …
The WHT/BLU
wire should be
connected to
Primary #1
The BRN wire
should be
connected to
Primary #1
The BLU wire
should be
connected to
Primary #2
The
WHT/BRN
wire should
be connected
196.0 to 207.9 0 101 0 101
208.0 to 219.9 6113 6113
220.0 to 231.9 0 113 0 113
232.0 to243.9 6125 6125
244.0 to 256.0 0 125 0 125
Note: In the next step, the voltage measured at the wall receptacle will drop immediately after the exposure is
started. Read the meter at this time.
3. Measure the AC line voltage (Voltage No Load = Vn) at the wall receptacle where the equipment is used.