Mindray VS-800 Service Manual
VS-800
Vital signs monitor
Service Manual
Copyright
Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray)
owns all rights to this unpublished work and intends to maintain this work as confidential.
Mindray may also seek to maintain this work as an unpublished copyright. This publication is
to be used solely for the purposes of reference, operation, maintenance, or repair of Mindray
equipment. No part of this can be disseminated for other purposes.
In the event of inadvertent or deliberate publication, Mindray intends to enforce its rights to
this work under copyright laws as a published work. Those having access to this work may
not copy, use, or disclose the information in this work unless expressly authorized by Mindray
to do so.
All information contained in this publication is believed to be correct. Mindray shall not be
liable for errors contained herein nor for incidental or consequential damages in connection
with the furnishing, performance, or use of this material. This publication may refer to
information and protected by copyrights or patents and does not convey any license under the
patent rights of Mindray, nor the rights of others. Mindray does not assume any liability arising
out of any infringements of patents or other rights of third parties.
Content of this manual is subject to changes without prior notice.
Content of this manual is maybe in defect of instructions ,If user has any problem ,Please
consult my company customerservice .
PROPERTY OF SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.
ALL RIGHTS RESERVED
Responsibility on the manufacturer party
Mindray is responsible for safety, reliability and performance of this equipment only in the
condition that:
• all installation, expansion, change, modification and repair of this equipment are conducted
by Mindray qualified personnel;
• applied electrical appliance is in compliance with relevant National Standards;
• the monitor is operated under strict observance of this manual.
I
Warning
For continued safe use of this equipment, it is necessary that the listed instructions
are followed. However, instructions listed in this manual in no way supersede
established medical practices concerning patient care.
Do not rely only on audible alarm system to monitor patient. When monitoring
adjusting the volume to very low or completely muting the sound may result
in the disaster to the patient. The most reliable way of monitoring the patient
is at the same time of using monitoring equipment correctly, manual
monitoring should be carried out.
This vital signs monitor is intended for use only by medical professionals in
health care institutions.
To avoid electrical shock, you shall not open any cover by yourself. Service
must be carried out by qualified personnel.
Use of this device may affect ultrasonic imaging system in the presence of the
interfering signal on the screen of ultrasonic imaging system. Keep the
distance between the monitor and the ultrasonic imaging system as far as
possible.
It is dangerous to expose electrical contact or applicant coupler to normal
saline, other liquid or conductive adhesive. Electrical contact and coupler
such as cable connector, power supply and parameter module socket-inlet
and frame must be kept clean and dry. Once being polluted by liquid, they
must be thoroughly dried. If to further remove the pollution, please contact
your biomedical department or Mindray.
It is important for the hospital or organization that employs this equipment to carry out a
reasonable maintenance schedule. Neglect of this may result in machine breakdown or injury
of human health.
II
Warranty
THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANT ABILITY OR
FITNESS FOR ANY PARTICULAR PURPOSE.
Exemptions
Mindray's obligation or liability under this warranty does not include any transportation or
other charges or liability for direct, indirect or consequential damages or delay resulting from
the improper use or application of the product or the substitution upon it of parts or
accessories not approved by Mindray or repaired by anyone other than a Mindray authorized
representative.
This warranty shall not extend to any instrument which has been subjected to misuse,
negligence or accident; any instrument from which Mindray's original serial number tag or
product identification markings have been altered or removed, or any product of any other
manufacturer.
Safety, Reliability and Performance
Mindray is not responsible for the effects on safety, reliability and performance of the
VS-800 vital signs Monitor if:
■ Assembly operations, extensions, re-adjusts, modifications or repairs are carried out
by persons other than those authorized by Mindray.
■ The VS-800 is not used in accordance with the instructions for use, or the electrical
installation of the relevant room does not comply with NFPA 70: National Electric
Code or NFPA 99: Standard for Health Care Facilities (Outside the United States, the
relevant room must comply with all electrical installation regulations mandated by the
local and regional bodies of government).
III
Return Policy
Return Procedure
In the event that it becomes necessary to return a unit to Mindray, the following procedure
should be followed:
1. Obtain return authorization. Contact the Mindray Service Department and obtain a
Customer Service Authorization (Mindray) number. The Mindray number must appear on
the outside of the shipping container. Return shipments will not be accepted if the
Mindray number is not clearly visible. Please provide the model number, serial number,
and a brief description of the reason for return.
2. Freight policy. The customer is responsible for freight charges when equipment is
shipped to Mindray for service (this includes customs charges).
Company Contact
Address: Mindray Building, 12th Keji Road South, Hi-tech
Phone: +86 755 26582479 +86 755 26582888
Fax: +86 755 26582934 +86 755 26582500
Industrial Park, Nanshan, Shenzhen, P.R.China
IV
Safety Precautions
1 . Meaning of Signal Words
In this manual, the signal words DANGER, WARNING, and CAUTION are used
regarding safety and other important instructions. The signal words and their meanings are
defined as follows. Please understand their meanings clearly before reading this manual.
Signal word Meaning
DANGER
WARNING
CAUTION
CAUTION Indicates a potentially hazardous situation which, if not avoided,
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury .
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
may result in property damage.
2 . Meaning of Safety Symbols
Symbol Description
Type-BF applied part
"Attention" (Refer to the operation manual.)
3 . Safety Precautions
Please observe the following precautions to ensure the safety of service engineers as well as
operators when using this system.
DANGER: Do not use flammable gasses such as anesthetics, or flammable
liquids such as ethanol, near this product, because there is danger
of explosion.
V
WARNING: Do not connect this system to outlets with the same circuit
breakers and fuses that control current to devices such as
life-support systems. If this system malfunctions and
generates an overcurrent, or when there is an instantaneous
current at power ON, the circuit breakers and fuses of the
building’s supply circuit may be tripped.
CAUTION: 1. Malfunctions due to radio waves
(1) Use of radio-wave-emitting devices in the proximity of this
kind of medical electronic system may interfere with its
operation. Do not bring or use devices which generate radio
waves, such as cellular telephones, transceivers, and radio
controlled toys, in the room where the system is installed.
(2) If a user brings a device which generates radio waves near
the system, they must be instructed to immediately turn OFF
the device. This is necessary to ensure the proper operation
of the system.
2. Do not allow fluids such as water to contact the system or
peripheral devices. Electric shock may result.
VI
Content
Content
Chapter 1 Monitor Description..........................................................................................1-1
1.1 Intended Use..............................................................................................................1-1
1.2 Environmental Specifications.....................................................................................1-1
Chapter 2 Principles of Operation....................................................................................2-1
2.1 General ......................................................................................................................2-1
2.2 Hardware Description.................................................................................................2-2
2.3 Software Description................................................................................................2-13
2.4 System parameters..................................................................................................2-17
Chapter 3 Chapter Specifications.....................................................................................3-1
3.1 Type of Monitor ..........................................................................................................3-1
3.2 Specifications of Monitor............................................................................................3-1
Chapter 4 Machine Disassembly/assembly and troubleshooting.....................................4-1
4.1 Disassembly/assembly Figure....................................................................................4-1
4.2 Inter-board Connections...........................................................................................4-12
4.2 Troubleshooting........................................................................................................4-16
Chapter 5 Machine Test and Material List........................................................................ 5-1
5.1Test Procedure............................................................................................................5-1
5.2 Material List................................................................................................................5-3
5.3 NIBP Calibration Method............................................................................................5-7
Chapter 6 Maintenance and Cleaning ............................................................................6-1
6.1 Inspection...................................................................................................................6-1
6.2 General Cleaning .....................................................................................................6-2
6.3 Cleaning Solution.......................................................................................................6-2
6.4 Disinfection.................................................................................................................6-3
6.5 Contact Information for Maintenance and Technical Support.....................................6-3
I
Content
For your notes
II
Monitor Description
Chapter 1 Monitor Description
1.1 Intended Use
This Monitor is intended for monitoring the patient’s vital signs including Non-invasive Blood
Pressure (NIBP), Pulse Oxygen Saturation (SpO2), Pulse Rate (PR) and Temperature (TEMP) for
single adult, pediatric and neonatal patient.
This Monitor is intended for use in the health-care institutions such as Outpatient Clinics,
Emergency Departments, Medical Floors, Clinics and Nursing Departments. It, however, is not
intended for critical patient monitoring, hospital transport or home use.
This Monitor is to be operated by clinical physicians or appropriate medical staffs under the
direction of physicians. The operator of the monitor must be well tranined. Any operation by
unauthorized or non-tranined personnel is forbidden.
1.2 Environmental Specifications
1.2.1 Temperature Requirements
Operating ambient temperature
Storage temperature
1.2.2 Relative Humidity
Operating relative humidity 15%-95%(non-condensing)
Storage relative humidity 10%-95%(non-condensing)
ºC - 40 ºC
0
10 ºC～＋40 ºC（50ºF -104ºF）(SmarTemp™ TEMP
module)
-20
ºC – 60 ºC
1.2.3 Altitude Requirements
atmospheric pressure at working conditon
(operating altitude)
atmospheric pressure in Storage
(Storage altitude)
70 to 106KPa
-500 to 4600m, -1640 to 15092ft
22 to 107.4KPa
-500 to 13100m, -1640 to 42979ft
1-1
Monitor Description
1.2.4 Power Requirements
Volt age:
Power:
AC 100-240 V, 50/60 Hz
70VA
1.2.5 Rechargeable Battery
Rechargeable lead-acid battery, 2.3 Ah, 12V
Minimum of 260min:
The monitor runs on power supplied by the new fully-charged battery in the following
conditions:
Ambient temperature:
Monitor configuration:
measurement per 15min)
Charge time:
Maximum of 8h
Lithium battery, 4.4Ah, 11.1V
Minimum of 620min
The monitor runs on power supplied by the new fully-charged battery in the following
conditions:
25ºC
SpO2 (Continuous measurement) and NIBP (one auto NIBP
Ambient temperature: 25ºC
Monitor configuration:
measurement per 15min)
SpO2 (Continuous measurement) and NIBP (one auto NIBP
Charge time: Maximum of 8h
Time to shutdown at low battery power: 5 to 15min after the first battery-low alarm (a
new fully-charged battery should be used)
1-2
Principles of Operation
Chapter2 Principles of Operation
2.1 General
The whole system consists of mechanical, hardware and software parts, as follows:
System
Mechanical
TEMP module
Host
Recorder
Battery
chamber
chamber
Hardware
Power board
Main board
Key&display
board
Parameter
board
Recorder board
Connection
cables
Figure 1 System structure
Software
System
software
Parameter
software
Upgrade
software
Printer
software
As shown in Figure 2-1, the VS-800 Vital Signs Monitor consists of
• 4 mechanical parts: host, recorder, TEMP module chamber and rechargeable battery
chamber;
• 6 hardware parts: main board, key&displays board, parameter boards, recorder board,
connection cables and power board;
• 4 software parts: System software, Parameter software, Upgrade software and printer
software.
2-1
Principles of Operation
2.2 Hardware Description
The hardware structure of the VS-800 is shown as Figure 2-2:
SpO2 module
NIBP module
Communication/p
LED &
KEY
Isolation power
board *
ower supply
Key&display
board
LCD
Power
supply
Speaker
Recorder
Main board
Fan
VS-800
* Mindray SpO2 module does not require the isolation power board.
TEMP module
Communication/p
Power board
ower supply
Ethernet
RS232
NurseCall
Battery
AC
Figure 2 Structure of hardware
Note1: The TEMP module mentioned in this manual is reserved for future use.
The hardware connections of the VS-800 Vital Sings Monitor are as shown in Figure 2-3:
2-2
Principles of Operation
Figure 3 Connections of VS-800 hardware
As shown in the figure above, the core of the system is the main board, from which the power
is adapted to all parameter modules; the parameter modules directly communicate with the
main board, and the measurement and status of all modules are controlled by the main board.
The functions and operation principles of the VS-800 hardware parts are detailed respectively
in the following sections.
2-3
2.2.1 Main Board
2.2.1.1 Principle diagram
Ethernet
PHY
RTL8201
Principles of Operation
Watchdog
RTC E2PROM
SPI
Nurse Call
Speaker
Audio process
circuit
1.5V
Linear power
3.3V
FlashSDRAM
5.0V
CPU
12V
Serial port 0
LCD
RS232 IC
FPGA
LED
KEY
RS232
Serial port 1: NIBP
Serial port 2: SpO2
Serial port 3: Temp
Serial port 4: Recorder
Figure 4 Operation principle of the main board
2.2.1.2 Principle
The main board communicates with all parameter modules and re corder module throug h serial
ports; the power of the parameter modules is adapted from the main board.
The main board supplies displaying information for the key&displays board detects the keys
and realizes the user’s interface.
The audio process circuit of the main board drives the speaker, thus to realize audible alarms,
key tones and PITCHTON.
The main board controls the alarm indicator through the signal wire is adapted from the
key&displays board.
In addition, the main board provides the nurse call connector, network connector and R232
connector.
The real-time clock is realized by the RTC chip to which the power is supplied from AC mains
or by the battery when available. When the AC power or battery is unavailable, the built-in
battery of the RTC chip supplies the power, thus guaranteeing the normal working status of the
clock.
SDRAM is responsible for storing data temporarily and running programs; FLASH serves as
2
the system program memory and trend data memory; E
PROM serves as the device
configuration memory.
2-4
Principles of Operation
2.2.1.3 Units of main board
2.2.1.3.1 FPGA
FPGA is used for:
Controlling STN-LCD
The PFGA drives the display of the monochromatic STN-LCD module, including the RAM and
displaying sequence; it communicates with the key&displays board CPLD.
The FPGA transmits data displayed by LEDs and receives key information by Means of
communicating with keypad CPLD through synchronous serial port.
Extending serial ports
The FPGA extends 3 serial ports for the communications with parameter modules.
Extending I/O port
The FPGA extends the I/O port for controlling the NURSE CALL circuit.
Generating frequency-adjustable signal
The FPGA generates the frequency-adjustable signal which is used by the audio process
circuit.
2.2.1.3.2 Audio process circuit
Following the common scheme regarding the key&displays board audio process circuit, the
audio process circuit generates envelope signals by using the PWM function of the CPU, and
generates audio frequency signals by using the FPGA.
2.2.1.3.3 ADC circuit
The ADC circuit detects ADV, +12V and battery voltages as well as the battery status voltage
by using the A/D converter. The A/D converter Provides a I
simulates the I
2
C bus signal with two I/O ports.
2
C bus interface. The CPU
2.2.1.3.4 Network connector
To guarantee that the earth wire of the network connector can pass the 1500V high-voltage
test, isolated components such as the network transformer must be placed near the RJ45
socket and kept a specific distance from other components.
2.2.1.3.5 RS232 connector
The RS232 connector is made of the UART module of the CPU and the RS232 chip. The
RS232 chip has the ESD protection function (±15KV).
2-5
Principles of Operation
2.2.1.3.6 NURSE CALL connector
2.2.1.3.7 The NURSE CALL connector controls the NURSE CALL signal by using an I/O
port extended by the FPGA.
2.2.2 Power Board
2.2.2.1 General
The power board converts the power input (from AC mains or battery) to different working
voltages for other boards; it also has the function of charging the battery.
2.2.2.2 Principle diagram
According to the design requirements, the power board can be divided into three parts: AC/DC
isolation converter, DC/DC converter and charging circuit, as shown in Figure 2-5.
AC
input
EMI filter Rectifer & filter
Start-up
circuit
PWM
controller
Current
detection
Flyback converter
Coupler feeckback
& isolation circuit
Rectifer
& filter
OVP&OPP
16.8
V
DC/DC
converter
LDO
circuit
Charging
circuit
DC/DC
converter
Switch circuit
OVP&OCP
12V
output
5V output
Battery
3.3V output
OVP&OCP
Figure 5 Operation principle of the power board
2.2.2.3 Principle
After the AC input reaches the power board through the connection board, it flows through the
EMI filter circuit and rectifier and filter circuit. Then it is converted to a DC voltage, which is
further converted to the 16.8V DC voltage by the Flyback converter. The 16.8V DC voltage is
the main input of the DC/DC converter and charging circuit; it is used to charge the lithium
battery or lead-acid battery, and also converted to 12V, 5V and 3.3V DC voltages by
corresponding DC/DC converters and LDO circuit. In case the AC input is unavailable, the
battery can supplies power for the DC/DC converters to get the 12V, 5V and 3.3V DC voltages.
Meanwhile, the 12V, 5V and 3.3V DC outputs are under the control of the switch signal.
2-6
Principles of Operation
The 16.8V DC output is protected against over-voltage and over-power; the 12V and 3.3V DC
outputs are protected against over-voltage, short-circuit and over-current; the 5V DC output is
protected against over-voltage and short-circuit.
2.2.3 Key&displays board
2.2.3.1 General
The key&displays board provides the user’s interface. The main board supplies the power for
the key&displays board. The LCD module, 7-segment digit display, LED indicators and keys
are integrated on this board.
Principle diagram
STN LCD
module
LED
LED&KEY
CPLD
Start-up
circuit
Start-up signal
OFF/STANDBY
detection
ADV
3.3V
VSB
Key
matrix
3.3V
disable
Switch
Figure 6 Operation principle of the key&displays board
2.2.3.2 Units
2.2.3.2.1 LCD module
This module has the function of adjusting the contrast and brightness in 10 levels,
Self-provided drive.
The FPGA controls the LCD. It transmits data signals and control signals to the LCD drive to
realize the display on the LCD.
The main board supplies the 3.3V power for the logic part of the LCD module, and the power
board supplies the 3.3V power for the backlight assembly.
This module displays menus, trend data and plethysmograms.
2-7
Principles of Operation
2.2.3.2.2 LED
There are Six groups of 7-segment digit display on the key&displays board. They are used for
displaying the systolic pressure, diastolic pressure, mean pressure/cuff pressure, SpO
, PR
2
and Temp; every group is of 3 digits.
The signal is transmitted from the main board FPGA to the CPLD, and is displayed by the
7-segment digit displays driven by the CPLD scanning.
The AC indicator is driven by the ADV voltage output from the power board.
The working status indicator (ON/STADNDBY indicator) is driven by the 3.3V voltage.
The battery indicator is controlled by the flash control signal, ADV signal and /BC signal
together. When the system is powered by the battery only, the CPLD outputs the flash control
signal and the battery indicator flashes; when the system is power by AC mains, the ADV
voltage drives the battery indicator to ON. The /BC signal is transmitted from the power board
to the cathode of the battery indicator. When there is no battery in the monitor, the resistance
of the /BC becomes high, so the battery indicator will never become ON.
The bichrome LED alarm indicator is driven by the 3.3V voltage and controlled by the flash
control signal output from the CPLD.
For other LED indicators, the anodes are co nnected t o 3.3V voltages and are controlled by the
CPLD I/O port.
The displaying and controling is signal of the indicators above is delivered from the main board
FPGA to the CPLD.
2.2.3.2.3 Keys
There are totally 12 keys.
ON/STANDBY key: In the OFF status, press this key to power on the monitor; in the working
status, press this key for less than 1s to enter the standby status. Press this key for more than
2s to power off the monitor.
The other 11 keys form a 3×4 matrix. The CPLD scans the key matrix, and performs the key
debouncing after detecting any key input signal. If the input signal is valid, the CPLD saves the
current key input code and transmits it to the main board.
2-8
Principles of Operation
2.2.4 SpO2 Module
2.2.4.1 General
The SpO2 module provides the function of measuring the Pulse Oxygen Saturation (SpO2).
2.2.4.2 Principle diagram
Figure 7 Operation principle of the SpO2 module
2.2.4.3 Principle
The SpO2 measurement principle:
1. Collecting the light signal of the red light and infrared transmitting through the
finger or toe which is pulsing;
2. Processing the collected signal to get the measured result.
The drive circuit of the LED and the gain of the amplifying circuit should be controlled
according to the different perfusions and transmittances of the tested object.
2.2.4.3.1 Led Drive Circuit
This circuit supplies the LED with the drive current, which can be regulated.
2.2.4.3.2 SPO2 Signal Process Network
The pre-amplifying circuit converts the photoelectric signal to the voltage signal and conducts
the primary amplification.
The gain adjusting and amplifying circuit conducts the secondary signal amplification and
adjusts the gain.
The biasing circuit adjusts the dynamic range of the signal, and sends it to the A/D conversion
part.
2-9
Principles of Operation
2.2.4.3.3 A/D
The A/D conversion part converts the analog signal to the digital signal, and then sends it to
CPU for further processing.
2.2.4.3.4 D/A
The D/A conversion part converts the digital signal received from CPU to the analog signal,
and provides the control signal for the Led Drive Circuit and SPO2 Signal Process Network.
2.2.4.3.5 CPU System
Implementing the logical control of all the circuits;
Implementing the data processing for the SpO
Implementing the communication with the main board.
parameter;
2
2.2.4.3.6 Power & Signal isolate Circuit
Isolating the external circuits to ensure the safety of human body;
Supplying power for all circuits;
Implementing the isolation communication between the CPU System and the main
board.
2.2.5 NIBP Module
2.2.5.1 General
This module provides the function of measuring the Non-Invasive Blood Pressure (NIBP).
2.2.5.2 Principle diagram
Figure 8 Operation principle of the NIBP module Principle
2-10
Principles of Operation
The NIBP is measured based on the pulse vibration principle. Inflate the cuff which is on the
forearm till the cuff pressure blocks the arterial blood, and then deflate the cuff according to a
specified algorithm. While the cuff pressure is decreasing, the arterial blood has pulses, which
are sensed by the pressure transducer in the cuff. Consequently, the pressure transducer,
connected with the windpipe of the cuff, generates a pulsation signal, which is then processed
by the NIBP module to get the NIBP value.
2.2.5.2.1 Valve Drive Circuit
This circuit controls the status (ON/OFF) of valves. It, together with the Motor Drive Circuit,
implements the inflation and deflation of the cuff.
2.2.5.2.2 Motor Drive Circuit
This circuit controls the action of the air pump. It, together with the Valve Drive Circuit,
implements the inflation and deflation of the cuff. Besides, it provides the status signal of the
motor for the A/D conversion part.
2.2.5.2.3 NIBP Signal Process Network
The NIBP signal is the differential input signal. The difference amplifying circuit amplifies the
dual-end difference signal and converts it to the single-end signal; meanwhile, this circuit
sends a channel of signal to the A/D conversion part, and the other to the DC isolating and
amplifying circuit.
The DC isolating and amplifying circuit removes DC components from the signal, amplifies the
signal, and then sends it to the A/D conversion part.
2.2.5.2.4 A/D
The A/D conversion part converts the analog signal to the digital signal, and sends it to the
CPU System for further processing.
2.2.5.2.5 Over Pressure Detect
The circuit detects the NIBP pressure signal. Once the pressure value exceeds the protected
pressure value, it will send a message to the CPU System, which asks the Valve Drive Circuit
to open the valve to deflate the cuff.
2.2.5.2.6 CPU System
Implementing the logical control of all the circuits;
Implementing the data processing for the NIBP parameter;
Implementing the communication with the main board.
2-11
Loading...