340 Service Manual
82 Pages
Preview
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GUARANTEE All equipment sold by GE Medical Systems Information Technologies, is fully guaranteed as to materials and workmanship for a period of 1 year. Information Technologies reserves the right to perform guarantee service operations in its own factory, at an authorized repair station, or in the customer’s installation. Our obligation under this guarantee is limited to repairing, or, at our option, replacing any defective parts of our equipment, except fuses or batteries, without charge, if such defects occur in normal service. Claims for damage in shipment should be filed promptly with the transportation company. All correspondence covering the instrument should specify the model and serial numbers. GE MEDICAL SYSTEMS Information Technologies A GE Medical Systems Company
World Headquarters
Europe / Middle East / Africa
Asia
8200 West Tower Avenue Milwaukee, WI 53223 USA Tel: +414.355.5000 800.558.5120 (US only) Fax: +414.355.3790 Internet: www.gemedicalsystems.com
Postfach 60 02 65 D-79032 Freiburg Germany Tel: +49.761.45.43.0 Fax: +49.761.45.43.233
11th Floor, The Lee Gardens 33 Hysan Avenue Causeway Bay Hong Kong Tel: +852.2100.6300 Fax: +852.2100.6292
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GE Medical Systems Information Technologies will make available on request such circuit diagrams, component diagrams, component parts lists, descriptions, calibration instructions, or other information which will assist the users or appropriately qualified technical personnel to repair those parts of the equipment which are classified by Information Technologies as repairable. Refer to the service manual for further information.
! CAUTION: In the United States of America, Federal Law restricts this device to sale by or on the order of a physician.
Corometrics and Marquette are registered trademarks of GE Medical Systems Information Technologies. GE is a registered trademark of General Electric Company. All other product and brand names are trademarks or registered trademarks of their respective companies. ©2001 GE Medical Systems Information Technologies. All rights reserved. No part of this manual may be reproduced without the permission of GE Medical Systems Information Technologies.
Contents Figures... v
Tables... vii Preface Overview of Telemetry Systems... ix About Your System... x Model 340 Original Release...x Model 340 Plus...x Model 340M...x Identifying Your System... xi Identifying Model 340 Original Release and Model 340 Plus Telemetry Systems . . xi Identifying a Model 340M Telemetry System... xii
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Safety... 1-1 General Information... 1-2 General Use... 1-2 Responsibility of the Manufacturer... 1-2 Definitions of Terminology... 1-3 Equipment Safety Information... 1-4 Warnings... 1-4 Cautions... 1-7 Equipment Symbols... 1-8 FCC Information... 1-9 FCC Rules Compliance... 1-9 FCC RF Exposure Compliance... 1-9 FCC Service Information... 1-9 Wireless Medical Telemetry Service... 1-10
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Introduction... 2-1 Product Summary... 2-2 Product Features... 2-3
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Controls, Indicators, and Connectors... 3-1 Receiver... 3-2 Receiver Front Panel... 3-2 Receiver Rear Panel... 3-4 Transmitter... 3-6 Transmitter Bottom Panel... 3-6 Transmitter Top Panel... 3-8 Transmitter Rear Panel Battery Compartment... 3-10
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Theory of Operation... 4-1 Transmitter Board (No. 2003708-001)... 4-2 Ultrasound... 4-2 UA... 4-4 ECG... 4-4 Control Circuitry... 4-5 Power Supply... 4-6 Telemetry Receiver Board Circuitry (No. 13856A)... 4-7 The RF Receiver... 4-7 Receiver Encoded Modulation... 4-8 TOCO Channel... 4-9 ECG Channel... 4-9 Ultrasound Channel... 4-10 Power Supply Circuitry... 4-10 Telemetry Transmitter Carrier Board (2003713-001)... 4-11 Telemetry Receiver Carrier Board (2004163-001)... 4-12
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Calibration... 5-1 FCC Service Information... 5-2 Test Equipment... 5-3 Receiver Calibration... 5-4 Accessing the Receiver Board... 5-4 Power Supply... 5-5 Ultrasound Channel ... 5-5 TOCO Channel ... 5-6 ECG Channel ... 5-7 Mode Controls ... 5-8 RF Carrier Detect... 5-9 Mode Outputs... 5-10 Pulsed Doppler Ultrasound Audio Converter... 5-10 Ultrasound Modulator... 5-11 Transmitter Calibration... 5-12 UA Channel... 5-12 ECG Channel... 5-12 Main Oscillator... 5-13 Power Supply... 5-13
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Maintenance... 6-1 General Cleaning Precautions... 6-2 Cleaning the Transmitter and Receiver... 6-3
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Troubleshooting... 7-1 Problem Chart... 7-2
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Technical Specifications... 8-1 Transmitter... 8-2 Receiver... 8-4
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Drawings... 9-1 Model 340 Telemetry System 2006920-001
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For your notes
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Figures Figure 1-1. Model 340 or Model 340 Plus REF Number... xi Figure 1-2. Model 340M REF Number... xii Figure 3-1. Receiver Front Panel...3-2 Figure 3-2. Receiver Rear Panel...3-4 Figure 3-3. Transmitter Bottom Panel...3-6 Figure 3-4. Transmitter Top Panel...3-8 Figure 3-5. Transmitter Rear Panel Battery Compartment...3-10 Figure 5-1. Summary of Test Equipment...5-3
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For your notes
Tables Table 1-1. Definitions of Terminology...1-3 Table 1-2. Equipment Symbols...1-8 Table 1-3. FCC Rules Compliance...1-9 Table 2-1. Summary of Monitor Parameters...2-3 Table 3-1. Receiver Front Panel...3-3 Table 3-2. Receiver Rear Panel...3-5 Table 3-3. Transmitter Bottom Panel...3-7 Table 3-4. Transmitter Top Panel...3-9 Table 5-1. Power Supply Voltages...5-5 Table 5-2. Band-Pass Filter Center Frequencies and –3 dB Points...5-8 Table 5-3. Center Frequencies of Tone Decoders...5-8 Table 5-4. Tone Decoder Output Locks...5-9 Table 5-5. Open Collector Transistor Switch Testing...5-10 Table 7-1. Troubleshooting...7-2
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For your notes
Preface
Overview of Telemetry Systems 1 This chapter provides an overview of the 340 Series of telemetry systems: About Your System... x Identifying Your System... xi
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Overview of Telemetry Systems: About Your System
About Your System Due to continuing product innovations, there are three versions of the Model 340 Telemetry System in hospitals today. All three versions operate identically from a user’s perspective. Unless otherwise indicated, the information in this manual applies to all three devices.
Model 340 Original Release The first release of the Model 340 Telemetry System operates in the frequency range 430–470 MHz.
Model 340 Plus The Model 340 Plus also operates in the frequency range 430–470 MHz offering additional channel numbers than the original Model 340. In addition, the Model 340 Plus offers flexibility by allowing factory reprogramming to an alternative channel number should interference become a factor in your location.
Model 340M The Model 340M operates in the frequency range 608–614 MHz where the “M” indicates “medical”. The Model 340M complies with the Federal Communications Commission (FCC) rules for Wireless Medical Telemetry Service (WMTS). In June 2000, the FCC allocated a new spectrum allowing potentially life-critical equipment to operate on an interference-protected basis. Refer to “Wireless Medical Telemetry Service” on page 1-10 in this manual for additional information.
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Overview of Telemetry Systems: Identifying Your System
Identifying Your System Each GE Medical Systems Information Technologies device has a unique serial number tag for identification. For each Model 340 Telemetry System, a reference number can be used to determine if the unit is a Model 340 Original Release, Model 340 Plus, or Model 340M. If your device’s REF number begins with “0”, refer to “Identifying Model 340 Original Release and Model 340 Plus Telemetry Systems” next on this page. If your device’s REF number begins with “3”, refer to “Identifying a Model 340M Telemetry System” on the following page.
Identifying Model 340 Original Release and Model 340 Plus Telemetry Systems If your device’s REF number beings with “0”:
u the fourth character identifies receiver or transmitter u the fifth character identifies Model 340 Original Release or Model 340 Plus Refer to Figure 1-1.
Product Code
Catalog Number
Other Device Characteristics
034_ _ _ _ - _ _ _ _ _ _ 1 = Telemetry Receiver 2 = Telemetry Transmitter
Language/Voltage Specifiers
Three to six characters that further describe the unit.
Version A = Model 340 Original Release B = Model 340 Plus
Figure 1-1. Model 340 or Model 340 Plus REF Number Example 1: If a serial number label shows REF 0341AAN-501, it is a receiver from a Model 340 Original Release system. Example 2: If a serial number label shows REF 0342BBN-XXX00B, it is a transmitter from a Model 340 Plus system.
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Identifying a Model 340M Telemetry System If your device’s REF number beings with “3”:
u the third character identifies receiver or transmitter u the fourth character identifies Model 340M Refer to Figure 1-2.
Product Code
Catalog Number
Other Device Characteristics
34_M _ _ _ - _ _ _ _ _ _ 1 = Telemetry Receiver 2 = Telemetry Transmitter
Option/Language/Voltage Specifiers
Three to six characters that further describe the unit.
M = Model 340 Medical
Figure 1-2. Model 340M REF Number Example 1: If a serial number label shows REF 341MCCN-XXX00A, it is a receiver from a Model 340M telemetry system. Example 2: If a serial number label shows REF 342MBBN-XXX000B, it is a transmitter from a Model 340M telemetry system.
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Chapter 1
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Safety
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The information presented in this section is important for the safety of both the patient and operator and also serves to enhance equipment reliability. This chapter describes how the terms Danger, Warning, Caution, Important, and Note are used throughout the manual. In addition, standard equipment symbols are defined. This section includes the following important information: General Information... 1-2 Definitions of Terminology... 1-3 Equipment Safety Information... 1-4 Equipment Symbols... 1-8 FCC Information... 1-9
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Safety: General Information
General Information General Use If any equipment is cold to the touch or below ambient temperature, allow it to stabilize before use. To ensure patient safety, use only parts and accessories manufactured or recommended by GE Medical Systems Information Technologies. Parts and accessories used shall meet the requirements of IEC 601.1.1. Disposable devices are intended for single use only. They should not be reused. Periodically, and whenever the integrity of the equipment is in doubt, test all functions. Refer to the “Maternal/Fetal Monitoring Operator’s Manual” for information concerning the limitations of internal and external fetal heart rate monitoring techniques.
Responsibility of the Manufacturer GE Medical Systems Information Technologies (hereinafter Information Technologies) is responsible for the effects on safety, reliability, and performance if:
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assembly operations, extensions, readjustments, modifications, or repairs are carried out by persons authorized by Information Technoligies;
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the electrical installation of the relevant room complies with the requirements of appropriate regulations; and
n
the equipment is used in accordance with the instructions for use.
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Safety: Definitions of Terminology
Definitions of Terminology Six types of special notices are used throughout this manual. They are: Danger, Warning, Caution, Contraindication, Important, and Note. The warnings and cautions in this safety section relate to the equipment in general and apply to all aspects of the equipment. Be sure to read the other chapters because there are additional warnings and cautions which relate to specific features of the equipment. When grouped, warnings and cautions are listed alphabetically and do not imply any order of importance.
Table 1-1. Definitions of Terminology
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Danger
A DANGER notice indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Warning
A WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Caution
A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. Cautions are also used to avoid damage to equipment.
Contraindication
A CONTRAINDICATION describes any special symptom or circumstance that renders the use of a remedy or the carrying out of a procedure inadvisable, usually because of a risk.
Important
An IMPORTANT notice indicates an emphasized note. It is something you should be particularly aware of; something not readily apparent.
Note
A NOTE indicates a particular point of information; something on which to focus your attention.
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Safety: Equipment Safety Information
Equipment Safety Information Warnings :$51,1*6 ACCIDENTAL SPILLS-In the event that fluids are accidentally spilled on the equipment, take the equipment out of operation and inspect for damage. APPLICATION-This equipment is not designed for direct cardiac connection. CONDUCTIVE CONNECTIONS-Avoid making any conductive connections to applied parts (patient connection) which are likely to degrade safety. CONDUCTIVE PARTS-Ensure that the conductive parts of the lead electrodes and associated connectors do not contact other conductive parts including earth. CONNECTIONS-The correct way to connect a patient to the transmitter is to plug the electrode leads into the patient cable which in turn connects to the transmitter. The receiver is connected to the wall socket by the power cord. Do not plug the electrode leads into the power cord, a wall socket, or an extension cord. DEFIBRILLATION-This equipment is not designed for use with defibrillators. ELECTRICAL SHOCK-To reduce the risk of electrical shock, do not remove equipment covers. Refer servicing to qualified personnel. ELECTROMAGNETIC INTERFERENCE-Be aware that strong electromagnetic fields may interfere with equipment operation. Interference prevents the clear reception of signals by the device. If the hospital is close to a strong transmitter such as TV, AM or FM radio, police or fire stations, a HAM radio operator, an airport, or cellular phone, their signals could be picked up as signals by the equipment. If you feel interference is affecting the equipment, contact your Service Representative to check the equipment in your environment.
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Safety: Equipment Safety Information
:$51,1*6 ELECTROSURGERY-The equipment is not designed for use with high-frequency surgical devices. In addition, measurements may be affected in the presence of strong electromagnetic sources such as electrosurgery equipment. EXPLOSION HAZARD-Do not use this equipment in the presence of flammable anesthetics or inside an oxygen tent. GROUNDING-Do not defeat the three-wire grounding feature of the power cord by means of adaptors, plug modifications, or other methods. A dangerous shock hazard to both patient and operator may result. INSTRUCTIONS-For continued and safe use of this equipment, it is necessary to follow all listed instructions. However, the instructions provided in this manual in no way supersede established medical procedures concerning patient care. The device does not replace observation and evaluation of the patient, at regular intervals, by a qualified care provider who will make diagnoses and decide on treatments and interventions. INTERFACING OTHER EQUIPMENT-Monitoring equipment must be interfaced with other types of medical equipment by qualified biomedical engineering personnel. Be certain to consult manufacturers’ specifications to maintain safe operation. LEAKAGE CURRENT TEST-The interconnection of auxiliary equipment with this device may increase the total leakage current. When interfacing with other equipment, a test for leakage current must be performed by qualified biomedical engineering personnel before using with patients. Serious injury or death could result if the leakage current exceeds applicable standards. The use of accessory equipment not complying with the equivalent safety requirements of this equipment may lead to a reduced level of safety of the resulting system. Consideration relating to the choice shall include: use of the accessory in the patient vicinity; and evidence that the safety certification of the accessory has been performed in accordance with the appropriate IEC 601.1 and/or IEC 601.1.1 harmonized national standard.
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Safety: Equipment Safety Information
:$51,1*6 LINE ISOLATION MONITOR TRANSIENTS-Line isolation monitor transients may resemble actual cardiac waveforms, and thus cause incorrect heart rate determinations and alarm activation (or inhibition). MRI USE-Do not use the equipment during MRI scanning; conducted current could potentially cause burns. PATIENT CABLES AND LEADWIRES-Do not use patient cables and electrode leads that permit direct connection to electrical sources. Use only “safety” cables and leadwires. Use of non-safety patient cables and lead wires creates risk of inappropriate electrical connection which may cause patient shock or death. PACEMAKER PATIENTS-Rate meters may continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias. Do not rely entirely upon rate meter alarms. Keep pacemaker patients under close surveillance. Refer to your monitor’s operator’s manual for disclosure of the pacemaker pulse rejection capability. SIMULTANEOUS DEVICES-Do not simultaneously connect more than one device that uses electrodes to detect ECG and/or respiration to the same patient. Use of more than one device in this manner may cause improper operation of one or more of the devices. STRANGULATION-Make sure all patient cables, leadwires, and tubing are positioned away from the patient’s head to minimize the risk of accidental strangulation. WATER BIRTHS-Do not use a fetal or maternal/fetal monitor to directly monitor patients during water births, in whirlpool or submersion water baths, during showers, or in any other situation where the mother is immersed in water. Doing so may result in electrical shock hazard.
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Safety: Equipment Safety Information
Cautions &$87,216 ANNUAL SERVICING-For continued safety and performance of the equipment, it is recommended that the calibration, accuracy, and electrical safety of the equipment be verified on an annual basis by an Information Technologies Service Representative. DAILY INSPECTION-It is essential that the equipment and accessories be inspected prior to every use. ENVIRONMENT-The performance of the equipment has not been tested in certain areas, such as x-ray and imaging suites. The equipment is not recommended for use in these environments. PERFORMANCE-Report all problems experienced with the equipment. If the equipment is not working properly, contact your Service Representative for service. The equipment should not be used if it is not working properly.
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