hispeed xi safety guidelines

TechnicalPublications

Copyright� 1998–2001 by General Electric Company

Operating Documentation

2197417Revision 7

CT HiSpeed SeriesSafety Guidelines/EMC

GE MEDICAL SYSTEMS SAFETY GUIDELINES / EMCCT HISPEED SERIES

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� THIS SERVICE MANUAL IS AVAILABLE IN ENGLISH ONLY.

� IF A CUSTOMER’S SERVICE PROVIDER REQUIRES A LANGUAGE OTHERTHAN ENGLISH, IT IS THE CUSTOMER’S RESPONSIBILITY TO PROVIDETRANSLATION SERVICES.

� DO NOT ATTEMPT TO SERVICE THE EQUIPMENT UNLESS THIS SERVICEMANUAL HAS BEEN CONSULTED AND IS UNDERSTOOD.

� FAILURE TO HEED THIS WARNING MAY RESULT IN INJURY TO THE SERVICEPROVIDER, OPERATOR OR PATIENT FROM ELECTRIC SHOCK,MECHANICAL OR OTHER HAZARDS.

� CE MANUEL DE MAINTENANCE N’EST DISPONIBLE QU’EN ANGLAIS.

� SI LE TECHNICIEN DU CLIENT A BESOIN DE CE MANUEL DANS UNE AUTRELANGUE QUE L’ANGLAIS, C’EST AU CLIENT QU’IL INCOMBE DE LE FAIRETRADUIRE.

� NE PAS TENTER D’INTERVENTION SUR LES ÉQUIPEMENTS TANT QUE LEMANUEL SERVICE N’A PAS ÉTÉ CONSULTÉ ET COMPRIS.

� LE NON-RESPECT DE CET AVERTISSEMENT PEUT ENTRAÎNER CHEZ LETECHNICIEN, L’OPÉRATEUR OU LE PATIENT DES BLESSURES DUES À DESDANGERS ÉLECTRIQUES, MÉCANIQUES OU AUTRES.

� DIESES KUNDENDIENST–HANDBUCH EXISTIERT NUR IN ENGLISCHER SPRACHE.

� FALLS EIN FREMDER KUNDENDIENST EINE ANDERE SPRACHE BENÖTIGT,IST ES AUFGABE DES KUNDEN FÜR EINE ENTSPRECHENDE ÜBERSETZUNGZU SORGEN.

� VERSUCHEN SIE NICHT, DAS GERÄT ZU REPARIEREN, BEVOR DIESESKUNDENDIENST–HANDBUCH NICHT ZU RATE GEZOGEN UND VERSTANDENWURDE.

� WIRD DIESE WARNUNG NICHT BEACHTET, SO KANN ES ZU VERLETZUNGENDES KUNDENDIENSTTECHNIKERS, DES BEDIENERS ODER DES PATIENTENDURCH ELEKTRISCHE SCHLÄGE, MECHANISCHE ODER SONSTIGEGEFAHREN KOMMEN.

� ESTE MANUAL DE SERVICIO SÓLO EXISTE EN INGLÉS.

� SI ALGÚN PROVEEDOR DE SERVICIOS AJENO A GEMS SOLICITA UN IDIOMAQUE NO SEA EL INGLÉS, ES RESPONSABILIDAD DEL CLIENTE OFRECER UNSERVICIO DE TRADUCCIÓN.

� NO SE DEBERÁ DAR SERVICIO TÉCNICO AL EQUIPO, SIN HABERCONSULTADO Y COMPRENDIDO ESTE MANUAL DE SERVICIO.

� LA NO OBSERVANCIA DEL PRESENTE AVISO PUEDE DAR LUGAR A QUE ELPROVEEDOR DE SERVICIOS, EL OPERADOR O EL PACIENTE SUFRANLESIONES PROVOCADAS POR CAUSAS ELÉCTRICAS, MECÁNICAS O DEOTRA NATURALEZA.

WARNING

AVERTISSEMENT

WARNUNG

AVISO


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� ESTE MANUAL DE ASSISTÊNCIA TÉCNICA SÓ SE ENCONTRADISPONÍVEL EM INGLÊS.

� SE QUALQUER OUTRO SERVIÇO DE ASSISTÊNCIA TÉCNICA, QUE NÃO AGEMS, SOLICITAR ESTES MANUAIS NOUTRO IDIOMA, É DARESPONSABILIDADE DO CLIENTE FORNECER OS SERVIÇOS DE TRADUÇÃO.

� NÃO TENTE REPARAR O EQUIPAMENTO SEM TER CONSULTADO ECOMPREENDIDO ESTE MANUAL DE ASSISTÊNCIA TÉCNICA.

� O NÃO CUMPRIMENTO DESTE AVISO PODE POR EM PERIGO A SEGURANÇADO TÉCNICO, OPERADOR OU PACIENTE DEVIDO A‘ CHOQUES ELÉTRICOS,MECÂNICOS OU OUTROS.

� IL PRESENTE MANUALE DI MANUTENZIONE È DISPONIBILESOLTANTO IN INGLESE.

� SE UN ADDETTO ALLA MANUTENZIONE ESTERNO ALLA GEMS RICHIEDE ILMANUALE IN UNA LINGUA DIVERSA, IL CLIENTE È TENUTO A PROVVEDEREDIRETTAMENTE ALLA TRADUZIONE.

� SI PROCEDA ALLA MANUTENZIONE DELL’APPARECCHIATURA SOLO DOPOAVER CONSULTATO IL PRESENTE MANUALE ED AVERNE COMPRESO ILCONTENUTO.

� NON TENERE CONTO DELLA PRESENTE AVVERTENZA POTREBBE FARCOMPIERE OPERAZIONI DA CUI DERIVINO LESIONI ALL’ADDETTO ALLAMANUTENZIONE, ALL’UTILIZZATORE ED AL PAZIENTE PERFOLGORAZIONE ELETTRICA, PER URTI MECCANICI OD ALTRI RISCHI.

ATENÇÃO

AVVERTENZA


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IMPORTANT! . . . X-RAY PROTECTION

X-ray equipment if not properly used may cause injury. Accordingly, the instructions herein contained shouldbe thoroughly read and understood by everyone who will use the equipment before you attempt to place thisequipment in operation. The General Electric Company, Medical Systems Group, will be glad to assist andcooperate in placing this equipment in use.

Although this apparatus incorporates a high degree of protection against x-radiation other than the useful beam, nopractical design of equipment can provide complete protection. Nor can any practical design compel the operator totake adequate precautions to prevent the possibility of any persons carelessly exposing themselves or others toradiation.

It is important that everyone having anything to do with x-radiation be properly trained and fully acquainted with therecommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reportsavailable from NCRP Publications, 7910 Woodmont Avenue, Room 1016, Bethesda, Maryland 20814, and of theInternational Commission on Radiation Protection, and take adequate steps to protect against injury.

The equipment is sold with the understanding that the General Electric Company, Medical Systems Group, its agents,and representatives have no responsibility for injury or damage which may result from improper use of the equipment.

Various protective material and devices are available. It is urged that such materials or devices be used.

��

All electrical installations that are preliminary to positioning of the equipment at the site prepared for the equipment shall beperformed by licensed electrical contractors. In addition, electrical feeds into the Power Distribution Unit shall be performedby licensed electrical contractors. Other connections between pieces of electrical equipment, calibrations, and testing shallbe performed by qualified GE Medical personnel. The products involved (and the accompanying electrical installations) arehighly sophisticated, and special engineering competence is required.

In performing all electrical work on these products, GE will use its own specially trained field engineers. All of GE’s electricalwork on these products will comply with the requirements of the applicable electrical codes.

The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-partyservice companies with equivalent training, or licensed electricians) to perform electrical servicing on the equipment.


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DAMAGE IN TRANSPORTATION

All packages should be closely examined at time of delivery. If damage is apparent, have notation “damage inshipment” written on all copies of the freight or express bill before delivery is accepted or “signed for” by a GeneralElectric representative or a hospital receiving agent. Whether noted or concealed, damage MUST be reported to thecarrier immediately upon discovery, or in any event, within 14 days after receipt, and the contents and containers heldfor inspection by the carrier. A transportation company will not pay a claim for damage if an inspection is not requestedwithin this 14 day period.

Call Traffic and Transportation, Milwaukee, WI (414) 827–3449 / 8*285–3449 immediately after damage is found. Atthis time be ready to supply name of carrier, delivery date, consignee name, freight or express bill number, itemdamaged and extent of damage.

Complete instructions regarding claim procedure are found in Section “S” of the Policy & Procedure Bulletins.

OMISSIONS & ERRORS

GE personnel, please use the GEMS CQA Process to report all omissions, errors, and defects in this documentation.Customers, please contact your GE Sales or Service represenatives.


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CAUTION

Do not use the following devices near this equipment. Use of these devices near this equipment could causethis equipment to malfunction.

Devices not to be used near this equipment:

Devices which intrinsically transmit radio waves such as; cellular phone, radio transceiver, mobile radio transmitter,radio–controlled toy, etc.

Keep power to these devices turned off when near this equipment.

Medical staff in charge of this equipment is required to instruct technicians, patients and other people who may bearound this equipment to fully comply with the above regulation.


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LIST OF EFFECTIVE PAGES

Tab – Section Page REV

– Title page

Title page rear

7

blank

(Warning and other impor-tant information)

a to e 0

(Revision Information) A 7

1 (Safety Guidelines) i 7

Introduction 1–1 to 1–4 6

Gantry Safety Awareness 2–1 to 2–18 7

PDU Safety Awareness 3–1 to 3–5 7

Emergency Controls Summary 4–1 to 4–2 6

2 (EMC) i 0

EMC 1–1 to 1–2 6

AppendixSymbols and Classification A–1 to A–4 6

– Blank/Rear cover –

REVISION HISTORY

REV Date Primary Reason for Change

7 10/05/01 – Added: PDU2.

6 7/06/00 – Colored all the sections and Appendix A. Removed ‘Contents’ page.

EMC Updated EMC requirements (EMC Performance and Installation Notice).

5 12/17/99 – PDU Voltage, Oil Leakage hazard

4 8/13/99 – Gantry Electrical Hazard

3 10/31/98 – XG Caution

2 7/10/98 – Lock out/Tag out description

1 4/10/98 – TGP Reset Caution from the OC

0 3/27/98 – Initial release.


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iSAFETY GUIDELINES

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SAFETY GUIDELINES

TABLE OF CONTENTS

SECTION PAGE

SECTION 1 – INTRODUCTION 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 GENERAL 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 OVERVIEW 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 OPERATOR CONSOLE HAZARD 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 – GANTRY SAFETY AWARENESS 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 EMERGENCY STOP SWITCH LOCATIONS 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-1 On the Gantry Cover 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1-2 On the Gantry Frame 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1-3 Emergency Stop From the Operators Console 2–3. . . . . . . . . . . . . . . . . . . . . . . .

2-2 GANTRY MECHANICAL HAZARD 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-1 Beware of Gantry Rotation 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-2 Axial Drive Switch and Buzzer for Gantry Rotation 2–5. . . . . . . . . . . . . . . . . . . . 2-2-3 Reset from the OC for Gantry Rotation 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-4 Preparation for Servicing the Gantry 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 GANTRY ELECTRICAL HAZARD 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 OTHER GANTRY HAZARDS 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4-1 X–ray Radiation 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-2 Thermal 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-3 Slip Rings 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-4 Laser Radiation 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 – PDU SAFETY AWARENESS 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 GENERAL 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 – EMERGENCY CONTROLS SUMMARY 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 GENERAL 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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SECTION 1 – INTRODUCTION

1-1 GENERAL

This manual describes the safety precautions that must be realized when servicing the GANTRY and PDU as partof the CT system. These 2 subsystems pose unique potential hazards to the service person. This manual is notgeared for detailed service training, but is written to emphasize awareness to the unique safety hazards facing theperson who services this system.

Danger, warning and caution statements are made throughout the manual with the symbols shown below. In addition,international symbols, shown on the next page, are also used. The definitions of the danger statement, warning state-ment, caution statement and international symbols are described as follows:

DANGERDANGER MEANS THAT THE SITUATION DESCRIBED WILL CAUSE DEATH ORINJURY TO YOU OR SOMEONE ELSE IF THE SAFETY INFORMATION IS NOTOBEYED.

WARNINGWARNING MEANS THAT THE SITUATION DESCRIBED CAN CAUSE PERSONAL INJURY ORDEATH TO YOU OR SOMEONE ELSE IF THE SAFETY INFORMATION IS NOT OBEYED.

CAUTIONCaution means that the situation described may cause personal injury to you or someoneelse if the safety information is not obeyed

NOTICENotice means that the situation described can cause damage to the system hardware/soft-ware or test equipment if the safety information is not obeyed.


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1-1 GENERAL(continued)

International symbol warning of an ionizing radiation hazard.

International symbol warning of a mechanical hazard.

International symbol warning of an electrical hazard.


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1-1-1 LOCK OUT / TAG OUT

In the U.S., or other countries which have an ECPL (Energy Control and Power Lockout) law or similar law as ECPL;or any field engineers who work in sites where a power distribution box with a lockout capability is used,GE service personel must be trained in and use ECPL procedures.

For systems powered from a power distribution box which has a lockout capability,lock out the system power at the main input (Power Distribution Box) prior to any component changes.

1-2 OVERVIEW

DANGERREAD THIS MANUAL IN ITS ENTIRETY PRIOR TO SERVICING CT SYSTEM.FAILURE TO HEED THIS WARNING MAY RESULT IN EQUIPMENT DAMAGE,PERSONAL HARM, HARM TO OTHERS OR DEATH.

This CT Gantry has continuous rotation design for its rotor (Slip–ring type). Therefore, do not service this CT systemin the same way as an alternating rotating system (Non Slip–ring type) such as you did for CT 9000 series, Max series,Pace, and Sytec series, otherwise, you might:

� injure or kill yourself.

� injure or kill others.

� destroy subsystems or the entire system.

� destroy test equipment.

� Gantry Mechanical

� Gantry Electrical

� Other Gantry Hazards

� PDU Electrical

NoteTo reduce the risk from potential hazards, always use appropriate Lockout/Tagout procedures whenservicing the system.


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1-3 OPERATOR CONSOLE HAZARD

The following warnings must be observed when servicing the Operator Console (OC).

WARNINGELECTRIC SHOCK AND BURN HAZARD! TURN OFF THE OC POWER SWITCH WHENACCESSING THE COMPONENTS OF THE OC. THIS TURNS OFF THE CONTACTOR WITHINTHE PDU, SO THAT AC115V LINE FOR THE OC IS DISCONNECTED. THEREFORE, ALLPOWER CAN BE THOROUGHLY REMOVED FROM THE OC.

NOTICEElectrostatic discharge hazard. It is essential to link yourself to ground potential by wearingan anti–static wrist strap when accessing any circuit boards within the OC. No board shouldever be accessed without this precaution.


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SECTION 2 – GANTRY SAFETY AWARENESS

This section describes the safety precautions that must be realized when servicing the GANTRY. The following areasof potential hazards are discussed in this section:

� Emergency Stop Switch Locations

� Gantry Mechanical

� Gantry Electrical

� Other Gantry Hazards

2-1 EMERGENCY STOP SWITCH LOCATIONS

2-1-1 On the Gantry Cover

There are the two Gantry emergency stop switches accessible when the Gantry covers are installed.

Illustration 2–1 Emergency Stop Switch On the Cover

EMERGENCY STOP SWITCHES


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2-1-2 On the Gantry Frame

There are four emergency stop switches accessible when the Gantry covers are removed. (See Illustration 2–2.)To connect (activate) the Emergency Stop Switches after removing the gantry cover, refer to:Functional Check/Adjustment, System, Checks during System Installation, EMERGENCY OFF TEST.

DANGERTHE EMERGENCY STOP SWITCHES ON THE INSIDE OF THE GANTRY ARENOT ACTIVE WHEN THE GANTRY COVERS ARE REMOVED UNLESS THEYARE CONNECTED.

Illustration 2–2 Emergency Stop Switch On the Gantry Frame (with the cover removed)

FRONT VIEWREAR VIEW

EMERGENCY STOP SWITCHES


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2-1-3 Emergency Stop From the Operators Console

To stop gantry rotation from the OC quickly during an emergency situation, press the OC Emergency Stop Switchas shown in Illustration 2–3.

DANGERDO NOT USE THE STOP SCAN SWITCH, LOCATED ON THE KEYBOARD, TOSTOP GANTRY ROTATION DURING AN EMERGENCY SITUATION. PRESSINGTHIS SWITCH ONLY ABORTS THE SCAN AND THE GANTRY CONTINUES TOROTATE. PRESS THE EMERGENCY STOP SWITCH (ILLUSTRATION 2–3) ORONE OF THE GANTRY EMERGENCY STOP SWITCHES (ILLUSTRATION 2–1OR 2–2) TO STOP GANTRY ROTATION.

Illustration 2–3 Emergency Stop Switch On the OC

STOP SCAN SWITCH(Do not use this button.)

EMERGENCY STOP SWITCH


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2-2 GANTRY MECHANICAL HAZARD

This section describes the potential hazards associated with gantry rotation. Your safety will be compromised if youdo not understand the risks. Please read carefully.

2-2-1 Beware of Gantry Rotation

The Gantry rotates 360 degrees every second. Danger to personnel is highest in the areas on either side of the Gantrywhere objects can be ejected at great velocity when the Gantry is rotating (if the Gantry side covers are removed).

DANGERIMPACT HAZARD!! DURING SERVICING, AVOID THE AREA AT THE RIGHT ORLEFT SIDE OF THE GANTRY WHENEVER THE GANTRY IS ROTATING ANDTHE SIDE COVERS ARE REMOVED. ALSO AVOID THIS AS MUCH AS POS-SIBLE WHEN THE GANTRY IS NOT ROTATING. FAILURE TO HEED THISWARNING MAY RESULT IN PERSONAL HARM, HARM TO OTHERS, ORDEATH.

Do not leave any board chassis opened during scanning, otherwise boards could be ejected at high speed and de-stroyed. In addition, always use procedures described in the service documentation when replacing components.

CAUTIONImpact Hazard. All components in the Gantry must be secured adequately using the propertools and all mounting hardware must be properly torqued to specification (if applicable).Mounting procedures described in the service documentation must be stringently followed.Failure to heed this caution may result in personal harm, harm to others.


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2-2-2 Axial Drive Switch and Buzzer for Gantry Rotation

WARNINGMECHANICAL HAZARD! IF THE XG ERROR OCCURS, THE GANTRY WILL BE ROTATEDSUDDENLY TO THE 180 DEGREE POSITION TO PREVENT LEAKING OF OIL FROM THETUBE. WHEN SERVICING THE GANTRY WITH THE COVER(S) REMOVED, THE AXIAL DRIVESWITCH (ROTATE) MUST BE TURNED OFF. FAILURE TO HEED THIS WARNING MAY RESULTIN PERSONAL HARM, HARM TO OTHERS OR DEATH.

Illustration 2–4 shows the location of the Axial Drive Switch (Rotate switch) to enable or disable the axial drive motorof the Gantry which is accessed at the gantry rear base.

When All Gantry Covers are removed:On the condition that Axial Drive switch is ON, the Table/Tilt (Control) switch is ON, and the three service bracketsare engaged (Illustration 2–5), the Axial Drive Enable Buzzer continues to sound. This means the Gantry can be ro-tated for scanning whenever you want.

Turn the Axial Drive Switch OFF to prevent it from rotating. Consequently, the Axial Drive Enable Buzzer also stopssounding.

DANGERMECHANICAL HAZARD!! NEVER PUT ANY BODY PART INTO THE GANTRYWITHOUT DISABLING THE AXIAL DRIVE AND VERIFYING THAT IT IS DIS-ABLED. THE AXIAL DRIVE ENABLE BUZZER MUST BE OFF. DO NOT SER-VICE THE GANTRY IF THE BUZZER SOUNDS. FAILURE TO HEED THIS WARN-ING MAY RESULT IN PERSONAL HARM, HARM TO OTHERS OR DEATH.


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2-2-2 Axial Drive Switch and Buzzer for Gantry Rotation (Continued)

Illustration 2–4 Axial Drive Switch

AXIAL DRIVE SWITCH

CONTROL SWITCH

Illustration 2–5 Three Service Brackets

Screws

Front

Bracket

Rear Gantry FrontService Bracket

Gantry RearService Bracket

Gantry Right SideService Bracket

21

313

2


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2-2-2 Axial Drive Switch and Buzzer for Gantry Rotation (Continued)

When Only Right Maintenance Cover is removed:The Safety switch on the right side cover is OFF so that the Gantry rotation is disable. To rotate the Gantry, the Mainte-nance cover MUST be installed.

DANGERDEATH OR SEVERE INJURY!

THE SAFETY SWITCH OF RIGHT SIDE COVER 4 MUST NOT BE ACTIVATEDBY THE WAY OTHER THAN CLOSING THE RIGHT MAINTENANCE COVER(e.g. BY ATTACHING A PIECE OF TAPE). ONCE THIS SWITCH IS ACTIVATED,THE GANTRY MAY ROTATE AND POTENTIAL DANGER IS PRESENT IF RIGHTMAINTENANCE COVER REMAINS OPENED.

Illustration 2–6 Safety Switch for Right Maintenance Cover

Front Rear4

4

Safety Switch

Right Maintenance CoverRight Side Cover

DANGERDEATH OR SEVERE INJURY!WHEN FRONT OR REAR COVER IS INSTALLED, THE RIGHT SIDE COVERMUST BE INSTALLED FIRST. IF THE FRONT AND REAR COVERS AREINSTALLED WITH THE RIGHT SIDE COVER REMOVED, THE GANTRY CANROTATE WITH NO AXIAL DRIVE ENABLE BUZZER.


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2-2-3 Reset from the OC for Gantry Rotation

When activating the following switches in the OC, the reset signal is transmitted to the TGP board in the Gantry sothat the Gantry will rotate.

� Reset switch of the Host CPU Assy:Resets the CT whole system.

� Power–OFF switch of the Host CPU Assy:Switches OFF only the OC. This mean that the other subsystem (Gantry, Table, PDU...) remains ON.

� Reset button of the DBPCI board in the Nest chassis:Resets a part of the boards in the OC (Keyboard, DASIF, Audio...) and TGP board in the Gantry.

Nest

ÍÍÍÍÍÍÍÍÍÍÍÍ

SCSIBay

ConnectorBox

�ostCPUAssy

DBPCIBoard

�ostCPUAssy

Reset Power OFF

Reset

OC Front View

OC Rear View

With the rear cover and innerback cover removed.

With the front cover removed.


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2-2-4 Preparation for Servicing the Gantry

In addition to the warnings stated earlier, note the following prior to servicing the gantry:

� Never work in the Gantry when the Axial drive enable buzzer sounds.

� Never assume that the Gantry will not rotate.

� If the side covers are removed, avoid standing at the right or left side of the gantry during gantry rotation.

� Always lockout/tag the system power line disconnect after shutting off power to the Gantry.

� Look at the position of the Axial Drive Switch (Illustration 2–4). Use this switch to stop the gantry and buzz-er. This switch must be OFF to ensure that the gantry is safe for servicing.

� Always hold the gantry with the Azimuth lock pin during service, otherwise the Gantry may unexpectedlyrotate under unbalanced conditions which occur when components are removed, thus, causing gantryrotation.

WARNINGMECHANICAL HAZARD! FAILURE TO HOLD THE GANTRY USING THE AZIMUTH LOCK PINPRIOR TO REMOVING COMPONENTS MAY LEAD TO GANTRY MOTION WHICH CAN STRIKEA PERSON CAUSING INJURY OR DEATH.

� Always remove jewelry (e.g. watches, rings, etc.), secure clothing and remove any clothing which couldget caught in rotating components.

� Always wear safety glasses.

� Always secure the side covers, front cover, and rear covers of the Gantry and tube hoist rail before tiltingthe gantry.

� Always announce when the Gantry is about to be enabled before enabling.

� Always use the hardware mounting procedures defined in the service documentation.

After servicing the Gantry, note the following:

� Do not leave any tools in the Gantry.

� Be sure that any covers on the Gantry rotating section are on and secured.


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2-3 GANTRY ELECTRICAL HAZARD

The PDU provides 400 VAC to the X–ray Generator subsystem via the slip ring in the Gantry. Illustration 2–7 showsthe XG power (440VAC) control switch on the Gantry rear base. The switch is used to open the System Safety Loop;when this Loop is opened, the K1 contactor in the PDU is turned OFF, disabling the 400V AC supply.

Illustration 2–7 XG Power Switch (400 VAC Able/Disable Switch)

XG POWER SWITCH


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2-3 GANTRY ELECTRICAL HAZARD (Continued)

DANGERELECTROCUTION!! WHEN SERVICING ANY COMPONENTS OF THE XG GENERATOR, WAITMORE THAN 5 MINUTES TO BE DISCHARGED AFTER THE CB1 AND CB5 INTHE PDU ARE TURNED OFF.

Illustration 2–8 CB1 and CB5 in the PDU1 (220XXXX / 224XXXX)

ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ

CB1

CB5


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Illustration 2–9 CB1 and CB5 in the PDU2 (229XXXX)

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PDU2 400V PDU2 200V

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��1

��5


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DANGERELECTROCUTION!! WHEN SERVICING THE SLIP RING, THE CB1 AND CB5 IN THE PDU MUST BETURNED OFF. (SEE ILLUSTRATION 2–8.)

DANGERELECTROCUTION!! THE 400 VAC IS SUPPLIED DIRECTLY TO THE SLIP RINGS IN REFERENCE TOTHE 200, 380, 400, 415, 440, 460, OR 480, 3 PHASE VAC INCOMING LINE. NEV-ER ENTER THE GANTRY INTERNAL AREA WITHOUT ENSURING THAT YOUHAVE DISABLED THE AXIAL DRIVE AND THE XG POWER SWITCH (400VACSOURCE). TOUCHING ANY POINT AT 400VAC IS LIKELY TO RESULT IN ELEC-TROCUTION.

DANGERELECTROCUTION!! TWO PEOPLE MUST ALWAYS BE PRESENT WHEN THE 400 VAC SUPPLY ISBEING MONITORED. WHILE ONE PERSON IS MAKING THE VOLTAGE MEA-SUREMENT, THE OTHER PERSON IS STANDING NEAR THE XG POWERSWITCH, READY TO FLIP THE SWITCH OFF IN THE EVENT OF AN EMER-GENCY. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL IN-JURY OR ELECTROCUTION.

DANGERELECTROCUTION!! THE 750VDC IS FLOATING INSIDE THE XG UNITS.IT TAKES MORE THAN 5 MINUTES TO BLEED OFF THE CAPACITORS IN THEXG UNITS AFTER XG POWER SWITCH AT THE GANTRY REAR BASE ISTURNED OFF.


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REV 7


WARNINGEXPLOSION HAZARD! LARGE FILTER CAPACITORS OF THE XG GENERATOR IN THE GANTRY COULD EXPLODEUNDER CERTAIN SITUATIONS. THEREFORE, BE SURE THAT ALL GENERATOR COVERSARE IN PLACE AND THAT SAFETY GLASSES ARE WORN AT ALL TIMES. OTHERWISE,PERSONAL INJURY MAY OCCUR FROM FLYING DEBRIS SUBSEQUENT TO A CAPACITOREXPLOSION.

In addition to the cautions and warnings in this GANTRY ELECTRICAL HAZARD section, follow the steps below priorto servicing the gantry:

� Always lockout/tag the system power line disconnect after shutting off power to the gantry. Verify the ab-sence of electrical power before attempting any disassembly.

� Do not manually rotate the Gantry without knowing what you are touching.

� Only use the methods of voltage measurements that are depicted in the service documentation.

� Reinstall all covers where exposed voltages are accessible.

NOTICEElectrostatic discharge hazard. It is essential to link yourself to ground potential by wearing an anti–static wrist strap whenaccessing any circuit board within the Gantry. No board should ever be accessed withoutthis precaution.


2197417


REV 7

2-4 OTHER GANTRY HAZARDS

Other areas of potential hazards and damage to hardware are listed below:

� X–ray radiation

� Thermal

� Slip Ring

2-4-1 X–ray Radiation

Due to higher x–ray power, risk to the service person increases. The Gantry does not have an audible x–ray on indica-tor nor is it required by FDA. It does have visual indicators on the gantry display and on the rear cover of the gantry.See Illustration 2–10.


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REV 7

2-4-1 X–ray Radiation (continued)

WARNINGX–RAY EXPOSURE! X–RAY EXPOSURE IS HARMFUL TO HUMAN HEALTH! BE SURE THATTHE SCAN ROOM IS CLEAR OF ALL PERSONNEL PRIOR TO MAKING X–RAY EXPOSURES.

Illustration 2–10 X–RAY ON Light

FRONT REAR

X–RAY ON LIGHT


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REV 7

2-4-2 Thermal

Due to the high heat output of the tube during x–ray exposure, the tube casing, cooling plumbing and radiator canbecome considerably hot.

WARNINGBURN HAZARD! NEVER TOUCH THE X–RAY TUBE CASING, THE COOLING LINES, OR THETUBE CASING RADIATOR UNTIL YOU KNOW THAT THEY ARE COOL. OTHERWISE,PERSONAL INJURY MAY OCCUR.

2-4-3 Slip Rings

DANGERELECTROCUTION!! THERE IS A LIVE CURRENT RUNNING THROUGH THEGANTRY SLIP RING POWER BRUSHES. DO NOT SERVICE THE GANTRY SLIPRINGS UNLESS THE CB1 AND CB2 IN THE PDU HAVE BEEN TURNED OFFAND CHECKED.

NOTICEDo not touch the slip rings with bare fingers because skin oil damages them. The slip ringsdo not require periodic cleaning. If cleaning is required (in FMI, etc), only follow the cleaningprocedure described in the documentation.


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REV 7

2-4-4 Laser Radiation

CAUTIONDamage to visual function!! Never look directly into the laser beam positioning lights. Thelaser beam can severely harm the eyes.

The Laser beam Positioning Lights might be equipped with some systems, which contains the Caution Labels on theGantry cover and ring cover.

Illustration 2–11 Laser Caution Labels

CAUTION LABEL ON THE GANTRY COVER

CAUTION LABEL ON THE LASER APERTURE(3 SHEETS ON THE GANTRY FRONT COVER, 2 SHEETS ON THE RING COVER)


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REV 7

SECTION 3 – PDU SAFETY AWARENESS

3-1 GENERAL

Illustration 3–1 shows the different voltage levels in the PDU.


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REV 7

3-1 GENERAL (continued)

Illustration 3–1 PDU1 (220XXXX / 224XXXX) Voltage Levels (e.g. 400V system PDU)

ÍÍÍÍÍÍÍÍÍÍ

ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ

ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ

SAFETY PROTECT COVER(Guard against shock hazard)

RATING VOLTAGE

(480VAC – 115VAC)


RATING VOLTAGE

(115VAC)


RATING VOLTAGE

(200VAC, 115VAC)


RATING VOLTAGE

(480VAC – 115VAC)

Note:For the 200V systemPDU, two protectcovers exists.

ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ


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REV 7


Illustration 3–2 PDU2 (229XXXX) Voltage Levels (e.g. 400V system PDU)

��

��

!!"��

��

��

��

#$"��%&&'��

��

��

��

#$"��%&&'��

��()��(�!""��*��(+�,-.��/��0��(��1(��(2��


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REV 7


DANGEREXTREME CARE MUST BE EXERCISED TO SAFELY SERVICE THE PDU.MORE THAN 100 KW OF POWER IS AVAILABLE AT THE PDU FOR SHORT PE-RIODS OF TIME. THEREFORE, CONSIDER ALL POINTS WITHIN THE PDU TOBE ELECTRICALLY HAZARDOUS. DO NOT PERFORM ANY WORK IN THEPDU UNLESS IT IS DEENERGIZED. FAILURE TO HEED THIS WARNING MAYRESULT IN PERSONAL INJURY OR DEATH.

In addition to the warning above, follow the steps below prior to servicing the PDU:

� Connect voltage measuring equipment only when power is removed and the wall Power Distribution Box(PDB) is locked and tagged.

� Always wear safety glasses.

� Be sure that all safety protect covers are in place before the PDU is energized. See Illustration 3–1.


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REV 7


WARNINGELECTROCUTION HAZARD! POWER IS SUPPLIED TO THE PDU TERMINAL (TB1) FROMTHE HOSPITAL PDB (POWER DISTRIBUTION BOX). EVEN IF PDU POWER IS CUT OFF BYTHE CB1 AND CB2 BREAKERS IN THE PDU OR OC POWER–ON SWITCH, THIS TERMINAL(TB1) ARE STILL LIVE.

Illustration 3–3 CB1, CB2 and TB1

TB1

ÈÈÈÈÈÈ

ÈÈÈÈÈÈÈÈ

CB1

CB2

PDU1 (220XXXX / 224XXXX)

PDU2 200V (229XXXX)

TB1

ÈÈÈÈÈÈÈÈ

CB1 CB2

TM2, TM5

TB1

ÈÈÈÈÈÈ

CB2

CB1

TM2, TM5

PDU2 400V (229XXXX)

ÈÈÈÈÈÈ


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REV 6

SECTION 4 – EMERGENCY CONTROLS SUMMARY

4-1 GENERAL

This sections summarizes the type of emergency controls (Table 4–1) that are available to the service person and/orthe customer, some of which were previously discussed.

Take note in Table 4–1 that only the System Emergency Off Switch and the Primary Power Disconnect are the keyemergency controls because these two switches remove all power to all components of the system. Whereas, theother emergency controls in Table 4–1 only effect part of the system.

DANGERBEFORE PERFORMING ANY SERVICING OF THE CT SYSTEMS, BE SUREYOU KNOW THE LOCATIONS OF THE SYSTEM EMERGENCY OFF SWITCHAND THE PRIMARY POWER DISCONNECT. BOTH ARE NORMALLY LOCATEDNEAR THE GANTRY AND OC. FAILURE TO ACCESS THESE TWO CONTROLSCAN RESULT IN BODILY INJURY OR DEATH IN THE EVENT OF AN EMER-GENCY.


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REV 6


NoteThe System Emergency OFF Switch and Primary Power Disconnect are the option kit (For GEMS–Am Only).

TABLE 4–1EMERGENCY CONTROLS

TYPE AVAILABLE TO: ILLUST. # PURPOSE

SERVICE CUSTOMER

CONSOLE EMERGEN-CY STOP SWITCH

YES YES 2–3 DISABLES X–RAY DRIVES, GANTRYDRIVES, AND TABLE DRIVES.

SYSTEM EMERGENCYOFF SWITCH

YES YES ––– REMOVES ALL POWER TO ALLCOMPONENTS.

PRIMARY POWER DIS-CONNECT

YES YES ––– REMOVES ALL POWER TO ALLCOMPONENTS.

AXIAL DRIVE DISABLESWITCH

YES NO 2–4 DISABLES GANTRY ROTATION.

XG POWER (400VAC)DISABLE SWITCH

YES NO 2–7 DISABLES XG AC MAIN POWERSUPPLY TO GANTRY.

EMERGENCY STOPSWITCHES ON GANTRY(COVERS INSTALLED)

YES YES 2–1 DISABLES X–RAY DRIVES, GANTRY,DRIVES, AND TABLE DRIVES.

EMERGENCY STOPSWITCHES ON GANTRY(COVERS REMOVED)

YES NO 2–2 DISABLES X–RAY DRIVES, GANTRY,DRIVES, AND TABLE DRIVES.


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iEMC

REV 0

EMC

TABLE OF CONTENTS

SECTION PAGE

SECTION 1 – EMC 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 EMC PERFORMANCE 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 NOTICE UPON INSTALLATION OF THE PRODUCT 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 GENERAL NOTICE 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-1 Designation of Peripheral Equipment Connectable to This Product 1–2. . . . . . 1-3-2 Notice against User Modification 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-3 Others 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 COUNTERMEASURES AGAINST EMC–RELATED ISSUES 1–2. . . . . . . . . . . . . . . . . . . 1-4-1 General Countermeasure Electromagnetic interference with other equipment 1–2

1-5 NOTICE ON SERVICE 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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iiEMC

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1–1EMC

REV 6

SECTION 1 – EMC

1-1 EMC PERFORMANCE

This CT system may characteristically cause electromagnetic interference with other equipment, either through airor connecting cables. The term EMC (Electromagnetic Compatibility) indicates capability of the equipment, whichcurbs electromagnetic influence from other equipment and at the same time does not affect other equipment withsimilar electromagnetic radiation from itself.This product is designed to fully comply with the group 1,Class A of EN60601–1–2 (IEC60601–1–2), in EMC regula-tions.

Proper installation following this service manual is required in order to achieve the full EMC performanceof this product.

The product must be installed as stipulated in [1–2. Notice upon Installation of the Product]. In case of issues relatedto EMC, please follow procedures stated in [1–4. Countermeasures against EMC–Related Issues].

1-2 NOTICE UPON INSTALLATION OF THE PRODUCT

1. Use either power supply cords provided by GEMS or ones designated by GEMS. Products equipped with powersource plug should be plugged into the fixed power socket which has the protective grounding conductor. Con-nect a three–pole plug to a three–pole socket without using a three–pole–to–two–pole converter.

2. Connect the permanent grounding equipment to the protective earth terminal of the place where the protectivegrounding conductor of the equipment is set up.

3. Locate the equipment as far as possible from other electronic equipment.

4. Be sure to use either any cables provided by GEMS or ones designated by GEMS. Wire these cables followingthese installation procedures.i.e. Wire power cables separately from signal cables.

5. Lay out the main equipment and other peripherals following these installation procedures.


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1–2EMC

REV 6

1-3 GENERAL NOTICE

1-3-1 Designation of Peripheral Equipment Connectable to This Product

Use the optional peripheral equipment, as designated by GEMS, to satisfy EMC requirement. Avoid using other equip-ment than designated by GEMS. Failure to comply with this instruction may result in poor EMC performance of theproduct.

1-3-2 Notice against User Modification

Never modify this product. Unilateral User modification may cause degradation in EMC performance. Modificationof the product includes;

a. Changes in cable (length, material, wiring etc.).

b. Changes in system installation / layout.

c. Changes in system configuration / components.

d. Changes in means of fixing system / parts (cover open / close, cover screwing).

1-3-3 Others

Operate the system with all covers closed. If you open any cover for some reason, be sure to shut it before starting/ resuming operation. Operating the system with any cover open may affects EMC performance.

1-4 COUNTERMEASURES AGAINST EMC–RELATED ISSUES

Generally it is very difficult to grapple with issues related to EMC. It may take much time and cost.

1-4-1 General Countermeasure Electromagnetic interference with other equipment(s)

1. Electromagnetic interference may be alleviated by positioning other equipment(s) far from the system.

2. Electromagnetic interference may be mitigated by changing the relative location (installation angle) between thesystem and other equipment(s).

3. Electromagnetic interference may be eased by changing wiring locations of power / signal cables of other equip-ment(s).

4. Electromagnetic influence may be reduced by altering the path of power supply for other equipment(s).

1-5 NOTICE ON SERVICE

1. Ensure that all screws are tight after servicing. Loose screws may cause the degradation in EMC performance.

2. In case the RF gasket of this system is broken, replace it with a new one immediately.


2197417

A–1

REV 6

APPENDIX A – SYMBOLS AND CLASSIFICATION

Symbol Publication Description

417–5032 Alternating Current

3335–1 Three–phase Alternating Current

3 N335–1 Three–phase Alternating Current with neutral con-

ductor

Direct Current

417–5019 Protective Earth (Ground)

348 Attention, consult ACCOMPANYING DOCUMENTS

417–5008 OFF (Power: disconnection from the mains)

417–5007 ON (Power: connection to the mains)

Warning, HIGH VOLTAGE

Emergency Stop


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A–2

REV 6

Symbol Publication Description

Type B

417–5339 X–ray Source Assembly Emitting

417–5009 Standby

Start

Table Set

Abort

Intercom

(on Operator Console)Power On: light onStandby: light off

Warning sign :Radiation of Laser Apparatus


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A–3

REV 6

Symbol Description

Microphone (Mic)

Contrast

Brightness

50�C

–10�C

System storage prior to installation:Maintain storage temperature between –10° C and +50° C

Excluding Condensation Humidity 10–90%

System storage prior to installation:Maintain non–condensing storage

humidity below 90%

DO NOT store system longer than 90 days

Air Pressure700–1060hPa

System storage and shipment:Maintain Air Pressure between 700 and 1060hPa


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A–4

REV 6

CLASS 1 EQUIPMENT

Any permanently installed equipment containing operator or patient accessible surfaces must provide backup protec-tion against electric shock,in case the BASIC INSULATION fails. In addition to BASIC INSULATION,Class1 equip-ment contains a direct connection to a PROTECTIVE(EARTH) CONDUCTOR which prevents shocks when a persontouches a broken piece of equipment or touches two different equipment surfaces simultaneously.

TYPE B EQUIPMENT

CLASS I, II, or III EQUIPMENT or EQUIPMENT with INTERNAL ELECTRICAL POWER SOURCES provide an ade-quate degree of protection against electric shock arising from (allowable) LEAKAGE CURRENTS or a breakdownin the reliability of the protective earth connection.

ORDINARY EQUIPMENT

Enclosed EQUIPMENT without protection against the ingress of water.

OPERATION 0f EQUIPMENT

CONTINUOUS OPERATION WITH INTERMITTENT LOADING.

Operation in which EQUIPMENT is connected continuously to the SUPPLY MAINS.The stated permissible loadingtime is so short that the long term on–load operating temperature is not attained.The ensuing interval in loading is,however, not sufficiently long for cooling down to the long term no–load operating temperature.

EQUIPMENT not suitable for use in the presence of a FLAMMABLE ANESTHETIC MIXTURE WITH AIR or WITHOXYGEN or NITROUS OXIDE.

CLEANING

The system is NOT WATERPROOF. It is NOT designed to protect internal components against the ingress of liq-uids.Clean external system surfaces(Gantry,table,consoles and accessories)with a soft cloth dipped in hot water andwrung DAMP/DRY. (NOT dripping!) IF NECESSARY, use only mild (dish washing liquid) soap to remove dirt.

NOTICEAvoid damage to equipment! Some ”spray and wipe”cleaners etch and permanently cloudclear plastic surfaces!! Use only warm water and mild liquid soap to clean surfaces.

GE Medical Systems: Telex 3797371P.O. Box 414, Milwaukee, Wisconsin 53201 U.S.A.(Asia, Pacific, Latin America, North America)

GE Medical Systems – Europe: Telex 698626283, rue de la Miniére, B.P. 34, 78533 Buc Cedex, France

hispeed xi safety guidelines

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