Technical Documentation
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Technical Documentation Babytherm® 8004/8010 Open Care Unit
Revision 5.0 6132.300 9029684
Because you care
Contents General 1
Symbols and Definitions
3
2
Notes
3
Function Description 1
Babytherm 8004 1.1
Radiant warmer ... 10
1.2
Control unit ... 11 1.2.1
ON/OFF switch ... 13
1.2.2
Toroidal-core power transformer ... 13
1.2.3
WT Power PCB ... 13
1.2.4
WT Relay PCB ... 17
1.2.5
WT Controller PCB ... 18
1.2.6
WT Sensor PCB ... 20
Front ... 22 1.3.1
WT LED 8004 PCB ... 23
1.3.2
Membrane keypad 8004 ... 23
1.3.3
Text display (LC display) ... 23
1.3.4
Loudspeaker ... 24
1.3.5
WT Front PCB ... 24
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1.3
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I
Contents Babytherm 8010 2.1
Radiant warmer ... 30
2.2
Control unit ... 31
4
6
II
ON/OFF switch ... 32
2.2.2
Toroidal-core power transformer ... 33
2.2.3
WT Power PCB ... 33
2.2.4
WT Relay PCB ... 38
2.2.5
WT Controller PCB ... 39
2.2.6
WT Sensor PCB ... 42
Front ... 45 2.3.1
WT LED 8010 PCB ... 46
2.3.2
Membrane keypad 8010 ... 46
2.3.3
Text display (LC display) ... 46
2.3.4
Loudspeaker ... 46
2.3.5
WT Front PCB ... 46
Trolley
49
3.1
Electrical height adjustment (option) ... 49
3.2
Options ... 49
Bed assembly 4.1
5
2.2.1
50
X-ray drawer ... 51
Mattresses
51
5.1
Gel mattress ... 51
5.2
Foam mattress ... 52
Pneumatic aspiration
52
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2.3
3
27
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2
Contents 7
Scales (Scale-Tronix) 7.1
7.2
52
Main PCB ... 52 7.1.1
Voltage selector ... 53
7.1.2
Transformer ... 53
7.1.3
Rectifier ... 53
7.1.4
Voltage regulator ... 53
7.1.5
Microcontroller ... 53
7.1.6
Quartz ... 53
7.1.7
Piezo loudspeaker ... 53
7.1.8
Reference voltage generation ... 54
Display PCB ... 54 7.2.1
EEPROM ... 55
7.2.2
Microcontroller ... 55
7.2.3
LEDs ... 55
7.2.4
LEDs control ... 55
7.2.5
7-segment displays ... 55
7.2.6
Quartz ... 55
7.2.7
+5 V voltage monitoring ... 55
7.3
Front Panel PCB ... 55
7.4
Weighing cells ... 55
Maintenance Procedures
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2
Worklight
59
1.1
General information about the worklight ... 59
1.2
Dismounting/replacing the worklight ... 59
Nightlight
60
2.1
General information about the nightlight ... 60
2.2
Dismounting/replacing the nightlight ... 60
III
Contents 3
Phototherapy lamps (option)
61
3.1
General information about the phototherapy lamps ... 61
3.2
Checking the phototherapy lamps ... 61
3.3
Dismounting/replacing the phototherapy lamps ... 62
Annex Parts catalog Test List
IV
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Technical Information
General
1
Babytherm 8004/8010 1
Symbols and Definitions
General
WARNING A WARNING statement provides important information about a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION A CAUTION statement provides important information about a potentially hazardous situation which, if not avoided, may result in minor or moderate injury to the user or patient or in damage to the equipment or other property.
NOTE A NOTE provides additional information intended to avoid inconvenience during operation.
Definitions according to German standard DIN 31051:
2
Notes
Inspection
= examination of actual condition
Maintenance
= measures to maintain specified condition
Repair
= measures to restore specified condition
Servicing
= inspection, maintenance, and repair
This Technical Documentation conforms to the IEC 60601-1 standard. Read each step in every procedure thoroughly before beginning any test. Always use the proper tools and specified test equipment. If you deviate from the instructions and/or recommendations in this Technical Documentation, the equipment may operate improperly or unsafely, or the equipment could be damaged.
The maintenance procedures described in this Technical Documentation may be performed by qualified service personnel only. These maintenance procedures do not replace inspections and servicing by the manufacturer. The information in this Technical Documentation is confidential and may not be disclosed to third parties without the prior written consent of the manufacturer. All rights reserved. Copyright reserved.
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It is our recommendation to use only Dräger parts and supplies.
This Technical Documentation is for the purpose of information only. Product descriptions found in this Technical Documentation are in no way a substitute for reading and studying the Instructions for Use/Operating Manual enclosed with the product at the time of delivery.
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General
Babytherm 8004/8010 Know-how contained in this Technical Documentation is subject to ongoing change through research and development and Dräger Medical reserves the right to make changes to this Technical Documentation without notice.
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All rights reserved. Copyright reserved.
NOTE Unless otherwise stated, reference is made to laws, regulations or standards (as amended) applicable in the Federal Republic of Germany for equipment used or serviced in Germany. Users or technicians in all other countries must verify compliance with local laws or applicable international standards.
Function Description
5
Babytherm 8004/8010 1
Babytherm 8004
Function Description The Babytherm 8004 is an open care unit for warming premature babies, neonates and infants with a body weight of up to 8 kg. The Babytherm 8004 uses a radiant warmer which can be set to “manual mode” or to “baby control mode” (skin-temperature control). The Babytherm 8004 may be used in delivery rooms, obstetric units, neonatal wards, pediatric wards and pediatric intensive care units.. The Babytherm 8004 may be operated by doctors or by nursing staff under the supervision of a doctor.
WARNING Risk of burns! Children who are in shock have a considerably lower skin temperature than normal and would be overheated when using the skin-temperature control mode. Do not use the skin-temperature control mode in children who are in shock!
WARNING Risk of hypothermia! Children who have a fever have a considerably higher skin temperature than normal and would get hypothermia when using the skin-temperature control mode. Do not use the skintemperature control mode in children who have a fever!
WARNING Risk of incorrect measurements! When using the skin-temperature sensor in “skin-temperature control” mode to measure rectal temperature, the core temperature would be measured and controlled. Never use the skin-temperature sensor to measure rectal temperature.
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The Babytherm 8004 consists of the radiant warmer, the control unit, the bed assembly and the wheeled frame.
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Function Description
Babytherm 8004/8010
Figure 1
Babytherm 8004 (front view)
Radiant warmer
2
Control unit
3
Bed assembly
4
Trolley without electrical height adjustment Trolley with electrical height adjustment (option)
8
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Legend
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Babytherm 8004/8010
Figure 2
Function Description
Block diagram of the Babytherm 8004
* The connection from the mains voltage terminal block to the height adjustment does not exist in USA units
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Function Description 1.1
Radiant warmer
Babytherm 8004/8010 The radiant warmer emits a preset amount of heat. A multicore cable connects the radiant warmer to the control unit. The radiant warmer contains the following parts: –
Two infrared elements (total power 600 W)
–
Energy-saving lamp (7 W)
–
Energy-saving lamp (23 W)
–
Central Alarm PCB
–
Six halogen lamps (50 W) for phototherapy (option)
–
Switched Mode Power Supply PCB for phototherapy (option)
Figure 3
Radiant warmer (bottom view)
Infrared element
2
Halogen lamps for phototherapy
3
Central Alarm PCB
4
Energy-saving lamp 1
5
Energy-saving lamp 2
6
Switched Mode Power Supply PCB for phototherapy (option)
NOTE If the work light button is pressed, both energy-saving lamps (energy-saving lamp 1 and 2) come on. If the night light button is pressed, only energysaving lamp (1) comes on.
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Legend
Babytherm 8004/8010 1.2
Control unit
Function Description The control unit controls the functions of the Babytherm 8004.
Figure 4
Control unit of the Babytherm 8004 (front view)
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Legend
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Alarm LED (red alarm LED = Warning, yellow alarm LED = Caution)
2
15-minute alarm silence button
3
Check button (for checking LEDs, 7-segment displays, audible alarm)
4
OK button
5
Operation indicators (green LED = ON, red LED = mains power failure)
6
Radiant warmer heat levels setting
7
Radiant warmer ON/OFF button
8
”Skin/man.” button (toggles between manual mode and skin-temperature control mode)
9
Phototherapy ON/OFF button (option)
10
Night light ON/OFF button (energy-saving lamp 1)
11
Work light ON/OFF button (energy-saving lamps 1 and 2)
12
Skin-temperature control target value setting
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Function Description
Babytherm 8004/8010
Figure 5
Control unit of the Babytherm 8004 (rear view), cover plate removed
1
WT Sensor PCB socket
2
Maximum of 3 connections for auxiliary equipment (workplace), nurse call (connection for central alarm)
3
Connection for internal paging system, nurse call (connection for central alarm)
4
RS 232 interface (modem), option
5
RS 232 interface (BabyLink), option
6
Control unit ON/OFF switch
7
Mains voltage selector
8
Fuses
9
Radiant warmer connection
10
Fuses
11
Mattress heater connection
12
Mains voltage supply connection
12
–
ON/OFF switch
–
Toroidal-core power transformer
–
WT Power PCB
–
WT Relay PCB
–
WT Controller PCB
–
Front (WT LED 8004 PCB, membrane keypad 8004, text display, WT Front PCB, loudspeaker)
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The control unit contains the following assemblies:
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Legend
Babytherm 8004/8010 1.2.1
ON/OFF switch
The ON/OFF switch is used to switch the mains voltage (single-pole) ON or OFF.
1.2.2
Toroidal-core power transformer
The toroidal-core power transformer supplies the electronic assembly and the mattress heater with the following AC voltages:
WT Power PCB
–
approx. 24 VAC
–
approx. 9 VAC
The WT Power PCB has the following function blocks: –
Bridge rectifier
–
Voltage regulator (+5 VD)
–
Voltage regulator (+5 V LED)
–
GoldCap
–
Charging circuit (GoldCap)
–
Mains power failure detection (powerfail)
–
Buzzer (mains power failure)
–
Alarm LED control (mains power failure)
–
Serial data transfer
–
Multiplexer
–
Addressing and controlling of actuators and safety relays
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1.2.3
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Function Description
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Figure 6
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Function Description Babytherm 8004/8010
Block diagram 1 of WT Power PCB
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Babytherm 8004/8010
Figure 7
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Block diagram 2 of WT Power PCB
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Function Description
Babytherm 8004/8010 Bridge rectifier The toroidal-core power transformer supplies the bridge rectifier input with approx. 9 VAC which are used to generate an unregulated direct voltage (9 VDC). Voltage regulator (+5 VD) A voltage regulator uses the unregulated direct voltage (9 VDC) to generate the regulated operating voltage (+5 VD). Voltage regulator (+5 V LED) A voltage regulator uses the unregulated direct voltage (9 VDC) to generate the regulated operating voltage (+5 V LED). GoldCap In the event of a mains power failure, the GoldCap capacitor supplies the buzzer and the power failure LED with operating voltage. The GoldCap voltage “battery” buffers also the RAM of the microcontroller. Charging circuit (GoldCap) The internal operating voltage +5 VD charges the GoldCap by means of a resistor-diode charging circuit. The charging circuit is switched off at 1-second intervals for test purposes. Mains power failure detection (powerfail) A monoflop monitors the mains power supply failure. Buzzer (mains power failure) A GoldCap capacitor supplies the buzzer with operating voltage in the event of a mains power failure.
A GoldCap capacitor supplies the alarm LED with operating voltage in the event of a mains power failure. Serial data transfer
Multiplexer The multiplexer applies the voltages (GCAPVOLT, +5 V LED) to the WT Controller PCB for checking. Addressing and controlling of actuators and relays An addressing module, a shift register and an amplifier module control the actuators and the safety relay fro the radiant warmer.
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A driver module amplifies the serial measurement data of the skin temperature and the test signals.
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Alarm LED control (mains power failure)
Babytherm 8004/8010 1.2.4
WT Relay PCB
Function Description The relays on the WT Relay WT control the energy-saving lamps, the infrared elements, the Central Alarm PCB and the phototherapy assembly (option) of the radiant warmer. A thyristor controls the infrared elements.
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The WT Relay PCB carries the following subassemblies:
Figure 8
–
Mains voltage selector
–
Control and feedback of the infrared elements
–
Safety relay of the infrared elements
–
Relay for the energy-saving lamps and phototheray assembly (option)
–
Control of the Central Alarm PCB
Block diagram of the WT Relay PCB
Mains voltage selector The mains voltage selector adapts the primary circuitry of the toroidal-core power transformer to the local mains voltage. 6132.300
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