BeneVision N1x and M1x series Service Manual Ver 5.0 July 2020

Intellectual Property Statement SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray) owns the intellectual property rights to this product and this manual. This manual may refer to information 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.

,

, and

are the registered trademarks or trademarks owned by

Mindray in China and other countries.

Revision History This manual has a revision number. This revision number changes whenever the manual is updated due to software or technical specification change. Contents of this manual are subject to change without prior notice. 

Version number:

5.0



Release time:

2020-07

© 2016 -2020 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.

I

Preface Manual Purpose This manual provides detailed information about the assembling, dissembling, testing and troubleshooting of the equipment to support effective troubleshooting and repair. It is not intended to be a comprehensive, in-depth explanation of the product architecture or technical implementation. Observance of the manual is a prerequisite for proper equipment maintenance and prevents equipment damage and personnel injury.

Intended Audience This manual is for biomedical engineers, authorized technicians or service representatives responsible for troubleshooting, repairing and maintaining the monitors

Passwords A password may be required to access different modes. The passwords are listed below: 

User maintenance:

888888



Manage Configuration:

315666



Factory maintenance:

332888



Demo mode:

2088

II

Contents 1 Safety... 1-1 1.1 Safety Information... 1-1 1.1.1 Dangers ... 1-1 1.1.2 Warnings ... 1-1 1.1.3 Cautions ... 1-2 1.1.4 Notes ... 1-2 1.2 Equipment Symbols... 1-2 2 Operation Theory ... 2-1 2.1 Overview ... 2-1 2.2 Product System Architecture ... 2-1 2.2.1 Main Control Board... 2-2 2.2.2 Internal Module Rack COM Board ... 2-3 2.2.3 Power Architecture ... 2-3 2.2.4 Independent Display Board (for the N17/M17 Only) ... 2-4 2.2.5 iView Module (for the N17/M17 Only) ... 2-4 2.2.6 Alarm LAMP Board ... 2-4 2.2.7 Power Switch Board... 2-4 2.3 Data Logic Flow ... 2-4 3 WLAN Installation ... 3-1 3.1 Introduction ... 3-1 3.2 Network Deployment Process ... 3-1 3.2.1 List of outputs ... 3-2 3.3 Network Requirements ... 3-3 3.4 Network Verification ... 3-4 3.4.1 Tools and Resources ... 3-4 3.4.2 Wi-Fi Signal Calibration... 3-4 3.4.3 Network Verification Process ... 3-5 3.5 Network Coverage Assessment with Patient Monitors... 3-7 3.6 Recommended Devices for WLAN... 3-7 3.7 Setting Wireless Parameters for Patient Monitors ... 3-8 3.8 Troubleshooting... 3-10 4 Testing and Maintenance... 4-1 4.1 Introduction ... 4-1 4.1.1 Test Equipment ... 4-1 4.1.2 Test Report... 4-1 4.1.3 Preventative Maintenance... 4-1 4.1.4 Recommended Frequency ... 4-1 4.2 Preventative Maintenance Procedures ... 4-3 4.2.1 Visual Inspection... 4-3 4.2.2 NIBP Tests... 4-3 1

4.2.3 Sidestream and Microstream CO2 Tests... 4-5 4.2.4 AG Tests... 4-8 4.3 Power On Test... 4-10 4.4 Module Performance Tests... 4-10 4.4.1 ECG Tests ... 4-10 4.4.2 Resp Performance Test ... 4-11 4.4.3 SpO2 Test ... 4-11 4.4.4 NIBP Tests ... 4-12 4.4.5 Temp Test... 4-12 4.4.6 IBP Tests ... 4-12 4.4.7 C.O. Test... 4-14 4.4.8 Mainstream CO2 Tests ... 4-14 4.4.9 Sidestream and Microstream CO2 Tests... 4-15 4.4.10 AG Tests ... 4-15 4.4.11 EEG Test ... 4-15 4.4.12 BIS Test ... 4-16 4.4.13 RM Test... 4-17 4.4.14 CCO/SvO2 Tests ... 4-18 4.4.15 PiCCO Test ... 4-19 4.4.16 NMT Tests... 4-21 4.5 Nurse Call Relay Performance Test ... 4-23 4.6 Analog Output Performance Test... 4-23 4.7 Electrical Safety Tests ... 4-23 4.8 Recorder Check ... 4-24 4.9 Network Print Test ... 4-24 4.9.1 Device Connection and Setup ... 4-24 4.10 Device Integration Check ... 4-25 4.11 Battery Check ... 4-25 4.12 Mounting Check... 4-25 4.12.1 Safety check ... 4-25 4.12.2 Overall Test and Check of Installed System ... 4-25 4.13 Factory Maintenance ... 4-26 4.13.1 Accessing Factory Maintenance Menu... 4-26 4.13.2 Monitor Information... 4-26 4.13.3 Production Test ... 4-27 4.13.4 Setup ... 4-27 4.13.5 Debug ... 4-27 4.13.6 Power Info... 4-28 4.13.7 ClinicalData ... 4-28 4.13.8 Transferring Clinical Data ... 4-28 4.13.9 Software Version... 4-28 4.13.10 Monitor Information ... 4-28 5 Troubleshooting ...5-1 5.1 Introduction... 5-1 5.2 Part Replacement... 5-1 2

5.3 Check before Powering on the Monitor ... 5-1 5.4 Software Version Check ... 5-1 5.5 Technical Alarm Check ... 5-2 5.6 Troubleshooting Guide ... 5-2 5.6.1 Power On/Off Failures ... 5-2 5.6.2 Display Failures ... 5-2 5.6.3 Module Rack Failures ... 5-3 5.6.4 Alarm Failures ... 5-4 5.6.5 Recorder Failures ... 5-5 5.6.6 Output Interface Failures ... 5-5 5.6.7 Power Supply Failures ... 5-6 5.6.8 Network Related Problems... 5-6 5.6.9 Software Upgrade Problems... 5-7 5.6.10 Device Integration Failures ... 5-8 6 Upgrade... 6-1 6.1 Overview ... 6-1 6.2 Upgrade of Parameter Function Modules... 6-1 6.3 Upgrade of Functional Assemblies ... 6-3 6.3.1 Upgrading SMR... 6-4 6.3.2 Upgrading Wireless Network Functions... 6-4 6.3.3 Upgrading Recorder ... 6-4 6.3.4 Upgrading iView System ... 6-5 6.3.5 Upgrading Independent Display Function ... 6-5 6.4 Upgrading Software ... 6-6 6.4.1 Description of Network Upgrade Tool ... 6-6 6.4.2 Guide to Software Upgrade Operations ... 6-9 6.4.3 Guide to Upgrade through a USB Disk ... 6-10 6.5 Upgrading CAA license function ... 6-13 7 Repair and Disassembly ... 7-1 7.1 Tools ... 7-1 7.2 Preparations for Disassembly... 7-1 7.3 Whole Unit Disassembly ... 7-2 7.3.1 Basic Disassembly ... 7-2 7.3.2 Disconnecting the Base... 7-3 7.3.3 Separating the Front and Rear Half of the Monitor ... 7-4 7.4 Further Disassembly of the Front Case Assembly... 7-7 7.4.1 Removing the PowerSwitch Board ... 7-7 7.4.2 Removing the Alarm Lamp and Light Sensor Board ... 7-7 7.4.3 Removing the Screen Assembly Connection Line ... 7-8 7.5 Further Disassembly of the Rear Case Assembly ... 7-9 7.5.1 Removing the Recorder ... 7-9 7.5.2 Further Disassembly of the Recorder... 7-9 7.5.3 Removing the MPAN Board... 7-11 7.5.4 Removing the Wi-Fi Module ... 7-11 3

7.5.5 Removing the Internal Module Rack Assembly ... 7-12 7.5.6 Removing the Main Support Assembly... 7-16 7.5.7 Removing the iView Board Assembly (N17 Series) ... 7-19 7.5.8 Removing the Independent Display Board Assembly (N17/M17 Series) ... 7-21 7.5.9 Removing the Handle ... 7-22 7.6 Further Disassembly of the Base Assembly ... 7-22 7.7 Disassembling the Module Rack ... 7-23 7.8 Disassembling the M51C Module ... 7-26 8 Parts...8-1 8.1 N17/M17/N15/M15/N12/M12 Whole Unit ... 8-1 8.1.1 Exploded View ... 8-1 8.1.2 Parts List ... 8-1 8.2 N12/M12 Front Housing view ... 8-1 8.2.1 Exploded View ... 8-1 8.2.2 Parts List ... 8-1 8.3 N12/M12 Rear Housing View ... 8-3 8.3.1 Exploded View ... 8-3 8.3.2 Parts List ... 8-3 8.4 N12/M12 Internal Module Rack Assembly ... 8-3 8.4.1 Exploded View ... 8-3 8.4.2 Parts List ... 8-3 8.5 N12/M12 Main Bracket Assembly ... 8-4 8.5.1 Exploded View ... 8-4 8.5.2 Parts List ... 8-4 8.6 N12/M12 Bottom Housing ... 8-4 8.6.1 Exploded View ... 8-4 8.6.2 Parts List ... 8-4 8.7 N15/M15 Front Housing View ... 8-4 8.7.1 Exploded View ... 8-4 8.7.2 Parts List ... 8-4 8.8 N15/M15 Rear Housing View ... 8-5 8.8.1 Exploded View ... 8-5 8.8.2 Parts List ... 8-5 8.9 N15/M15 Internal Module Rack Assembly ... 8-5 8.9.1 Exploded View ... 8-5 8.9.2 Parts List ... 8-5 8.10 N15/M15 Main Bracket Assembly... 8-6 8.10.1 Exploded View... 8-6 8.10.2 Parts List ... 8-6 8.11 N15/M15 Bottom Housing... 8-7 8.11.1 Exploded View... 8-7 8.11.2 Parts List ... 8-7 8.12 N17/M17 Front Housing View... 8-8 8.12.1 Exploded View... 8-8 8.12.2 Parts List ... 8-8 4

8.13 N17/M17 Rear Housing View ... 8-8 8.13.1 Exploded View ... 8-8 8.13.2 Parts List... 8-8 8.14 N17/M17 Main Bracket Assembly ... 8-10 8.14.1 Exploded View ... 8-10 8.14.2 Parts List... 8-10 8.15 N17/M17 Independent Display Assembly ... 8-10 8.15.1 Exploded View ... 8-10 8.15.2 Parts List... 8-10 8.16 N17/M17 Bottom Housing ... 8-10 8.16.1 Exploded View ... 8-10 8.16.2 Parts List... 8-10 8.17 MPM module (M51A) ... 8-12 8.17.1 Exploded View ... 8-12 8.17.2 Parts List... 8-12 8.18 M51C Module (Platinum) ... 8-13 8.18.1 Exploded View ... 8-13 8.18.2 Parts List... 8-13 8.19 Others ... 8-14 A Electrical Safety Inspection... A-1 A.1 Power Cord Plug ...A-1 A.1.1 The Power Plug ...A-1 A.2 Device Enclosure and Accessories ...A-1 A.2.1 Visual Inspection ...A-1 A.2.2 Contextual Inspection ...A-2 A.3 Device Labeling ...A-2 A.4 Protective Earth Resistance...A-2 A.5 Earth Leakage Test ...A-3 A.6 Patient Leakage Current...A-4 A.7 Mains on Applied Part Leakage ...A-5 A.8 Patient Auxiliary Current ...A-6

5

1 Safety 1.1 Safety Information

DANGER 

Indicates an imminent hazard that, if not avoided, will result in death or serious injury.

WARNING 

Indicates a potential hazard or unsafe practice that, if not avoided, could result in death or serious injury.

CAUTION 

Indicates a potential hazard or unsafe practice that, if not avoided, could result in minor personal injury or product/property damage.

NOTE 

Provides application tips or other useful information to ensure that you get the most from your product.

1.1.1 Dangers There are no dangers that refer to the product in general. Specific “Danger” statements may be given in the respective sections of this manual.

1.1.2 Warnings WARNING 

All installation operations, expansions, changes, modifications and repairs of this product are conducted by Mindray authorized personnel.



There is high voltage inside the equipment. Never disassemble the equipment before it is disconnected from the AC power source.



When you disassemble/reassemble a parameter module, a patient leakage current test must be performed before it is used again for monitoring.

1-1



The equipment must be connected to a properly installed power outlet with protective earth contacts only. If the installation does not provide for a protective earth conductor, disconnect it from the power line and operate it on battery power, if possible.



Dispose of the package material, observing the applicable waste control regulations and keeping it out of children’s reach.

1.1.3 Cautions CAUTION 

Make sure that no electromagnetic radiation interferes with the performance of the equipment when preparing to carry out performance tests. Mobile phone, X-ray equipment or MRI devices are a possible source of interference as they may emit higher levels of electromagnetic radiation.



Before connecting the equipment to the power line, check that the voltage and frequency ratings of the power line are the same as those indicated on the equipment’s label or in this manual.



Protect the equipment from damage caused by drop, impact, strong vibration or other mechanical force during servicing.

1.1.4 Notes NOTE 

Refer to Operation Manual for detailed operation and other information.

1.2 Equipment Symbols See the N series Operator’s Manual for information about the symbols used on this product and its packaging.

1-2

2 Operation Theory 2.1 Overview As a bedside workstation for multi-parameter monitoring, the N series and M series can provide the complete patient management, abundant physiological parameter monitoring and physiological alarm functions, as well the powerful data review function and the flexible wired and wireless network configuration and application capabilities. The third-party application can be accessed easily through the iView application, meeting the increasingly common information requirements of hospitals. The provided series of CAA applications can help doctors to make auxiliary diagnosis for patients. Meanwhile, the N series and M series provide the hospital management personnel with more excellent monitor management applications, rendering assistance in fixing the efficiency and quality problems during monitor equipment management of hospitals. The N series and M series provide the product models with display screens of different sizes according to the demand of clinical application. In addition to touch screen operations, the user can use the mouse and keyboard to operate the monitor. The N series and M series can connect to multiple display screens to function as mirror screens or extension screens. The series of products are compatible with the BeneView T series plug-in modules and related accessory products. They can work together with the TDS to implement the intra-hospital transfer application of patients. In comparison with the BeneView T series products, the N series and M series boast better human-computer interaction design and clinical applicability, more complete IT solution capability of hospitals, and more abundant CDS applications.

2.2 Product System Architecture All the N17/N15/N12/M17/M15/M12 monitors have only one main unit: 

The N12/M12 main unit uses the 12.1” TFT WXGA display screen.



The N15/M15 main unit uses the 15.6” TFT FHD display screen.



The N17/M17 main unit uses the 18.5”TFT FHD display screen.



All of them use the touch screen as an input device and can extend the mouse, keyboard and remote control.



An internal module rack is integrated, with 4 slots (N12) or 6 slots (N15/N17).



The MPAN and WiFi modules are optional.



The built-in recorder is optional.



The N15/M15/N17/M17 can connect to the external module rack and TDS; the N12/M2 can connect to the TDS.

2-1

LCD TP control board

Front shell Back shell

Alarm lamp board

Speaker

DVI

Power switch board

WiFi module (Optional)

MPAN module (Optional)

Independent display board （N17 Optional） Internal module com board（4slots/6slots） Main control board

iView assembly （N17 Optional） DVI

RJ45

2*USB

Nurse call interface

4/6*Module communication interface

SMR interface

2*USB

AC/DC module

Recorder (Optional) 2*USB

2*USB

DVI

Battery interface board (N12/N12C)

RJ45

Bottom shell

AC/DC interface

Battery interface board (N15/N17)

Battery

Battery

Figure 2-1 System block diagram of the N17/M17/N15/M115/N12/N12C/M12

2.2.1 Main Control Board There are the main control CPU, program memory, data memory, system configuration memory, system FPGA, Wi-Fi module (optional), power management MCU, battery charging circuit, and DC-DC circuit on the main control board. The internal interface and external interfaces are also provided on the board. The internal interface is an interface between the recorder, internal module rack COM board, AC-DC, and the battery. The external interfaces refer to the DVI display interface, USB interface, and Ethernet interface.

MPAN Module

Internal Module Rack communication board

SPI

MMC

E2ROM(funnct ion cfg)

Nursecall interface

DDR3 I2C

RTC SMR Interface

MMC Alarm light controller

Touch panel

WiFi （optional）

Main Control board

Program Memory

Data Memory

Touchcontroller

I2C SPI

E2ROM

USB

USB hub

Main Processor

Photo senseor

Speaker

Audio codec/AMP

Power key board

Power M0

RJ-45

UART

RMII1

PHY

LCDC

FPGA （N15/N17） DVI transfer

PHY

Back light driver

Figure 2-2 Diagram of the main control board 2-2

USB 4*port Independent display board/iView LCD DVI interface

2.2.2 Internal Module Rack COM Board Two models of internal module rack COM boards are available. The N12/M12 uses the 4-slot COM board, and the N15/M15/N17/M17 uses the 6-slot COM board. The internal module rack COM board is used to provide the interface for communication with the parameter module, the SMR interface and nurse call interface, and the MPAN module interface. Besides, the data forwarding FPGA and corresponding power circuit are also provided on the internal module rack COM board.

2.2.3 Power Architecture Power switch board

LCD&TP

+5V/+3.3V

Led driver

Photo Alarm lamp board senseor

+3.3V

+3.3V_1

M0

+12V

DC/DC

+3.3V_2

MPAN module

ON/OFF DC/DC

LDO 100～240V AC

Internal module rock COM board

ON/OFF AC/DC module

AC-DC in

switch

DC/DC VBUS： 9.6～11.1V, +15V

ON/OFF BAT charger

+12V

+5V DC/DC

+12V

iView module

+3.3V

Battery +5V

+5V

Independent display board

+12V

Recorder

Figure 2-3 Diagram of power architecture The AC/DC power module outputs 15V to the main control board, and 3.3V, 5V and 12V can be generated through the internal DC-DC conversion circuit in the main control board to provide a power supply to other modules or boards in the main unit. The battery charging circuit is powered by 15V, and the AC power supply and battery power supply can be switched according to AC on-line detection. The +12V power supply is provided to the power supply, including the external module rack, and the DC-DC isolation design is implemented at the module end. The iVIew assembly uses the power rail Vbus, which is the switching output between the AC-DC output and battery and aims to avoid abnormal power failure of the iView module and running exception of the Windows OS running on other modules due to an unexpected power failure of the AC power supply. The battery supports the main unit to stop the iView module in the normal power-off mode. In the case of battery power supply, the iView module cannot start.

2-3

2.2.4 Independent Display Board (for the N17/M17 Only) It is used to connect the main unit to a display and extend the main screen display. It adopts the DVI interface. Moreover, the external display with a touch screen can be supported through the USB interface of the main unit. At present, the supported display with a touch screen is Elo 1919LM.

2.2.5 iView Module (for the N17/M17 Only) As an embedded computer module, it provides the following external interfaces: the network interface, DVI interface, and the USB interface. It can connect to the keyboard, mouse, network cable, and display independently. The configuration of the iView module is mutually exclusive with that of the independent display module.

2.2.6 Alarm LAMP Board The LED alarm lamp and light sensor are provided on the board. The light sensor implements the ambient light detection and is used to adjust brightness of the LCD background light.

2.2.7 Power Switch Board There are the power switch and three indicators on the power switch board, which are the AC on-line indicator, battery indicator, and the power-on indicator.

2.3 Data Logic Flow Display and user interface

Data collection

Data forwarding

System application

Data output

Data storage Figure 2-4 Data flow diagram The monitoring parameters are collected and analyzed through the module, and then forwarded to the system software through the internal or external module rack. The system software displays the waveform, numerical value and alarm information, and the data, alarm information and numerical value are also stored in the internal data memory at the same time. Meanwhile, they can also be sent to the central station or other monitors through the wired or wireless network.

2-4

3 WLAN Installation 3.1 Introduction This chapter describes how to install Mindray patient monitors using WLAN.

3.2 Network Deployment Process If the hospital has built its WLAN, the installation process is illustrated as follows:

Mindray/agent marketing or sales personnel

A0 Provide network requirements

Mindray headquarters

A1 Communicate with the hospital about intention to order

Mindray/agent service personnel

A2 Communicate with the hospital about network requirements and ask the hospital to perform corresponding setting and adjustment

A3 Do site survey

Pass or fail

Pass A4 Sign the contract

A5 Install the device and confirm system operation

3-1

3.2.1 List of outputs Action

Output

Requirements

Template

A0

Wireless Network requirements

Determine requirements for deployment of

Wireless Network Requirement

for Mindray patient monitors

the wireless network for Mindray patient

Table in 3.3 Network Requirements

monitors. A3

A5

Network acceptance report

Installation confirmation report

Confirm that the customer network meets

Wireless Network Acceptance Table

requirements of Mindray patient monitors by

in 3.4.3 Network Verification

means of questionnaire and measurement.

Process

Confirm the actual operation of the Mindray

Patient Monitor Installation

patient monitors after installation.

Confirmation Table in 3.5 Network Coverage Assessment with Patient Monitors

If the hospital plans to build a new WLAN for the Mindray patient monitors, make sure that there is at least one idle Wi-Fi channel that is not in use. Otherwise, you can’t make co-channel interference meet Mindray patient monitors’ requirement after the new WLAN is built. The installation process is illustrated as follows:

Mindray/agent marketing or sales personnel

A0 Provide network requirements

Mindray headquarters

A1 Communicate with the hospital about intention to order

Mindray/agent service personnel

A2 Do site survey and design network

A3 Sign the contract

A4 Install network

A5 Install the device and confirm system operation

3-2

Action

Output

Requirements

Template

A0

Wireless Network

Determine requirements for deployment

Wireless Network Requirement Table

requirements for Mindray

of the wireless network for Mindray patient

in 3.3 Network Requirements

patient monitors

monitors.

Network design document,

/

/

Installation confirmation

Confirm the actual operation of the

Patient Monitor Installation Confirmation

report

Mindray patient monitors after installation.

Table in 3.5 Network Coverage

A2

Bill of material A5

Assessment with Patient Monitors

NOTE 

Network design and deployment project needs much more complex process, you need professional IT engneer’s help to finish the job. This document does not include these contents.

3.3 Network Requirements The Wireless infrastructure needs to meet the following requirements. Table 3-1 Wireless Network Requirement Table No.

Item

Content of Requirements

Wireless coverage requirements

1 2 3

Received signal

≥-65 dBm

strength (RSSI)

RSSI is the value displayed on the patient monitor

Co-channel

≤-20dB (co-channel interference AP’s RSSI shall be at least 20 dB lower than the AP that patient

interference

monitor uses.)

Ping delay

The mean delay of PC or cell phone is smaller than 100ms and The packet lost rate shall be less than 1%.

Requirements of AP capability 1

AP capability

1． The anticipated number of devices connecting to one AP must be lower than 50% of the AP capability. For example, In the coverage of one AP, the typical number of devices connected to this AP is 16, then the announced number of devices that can connect to AP simultaneously must be more than 32. 2． The AP Can create several SSIDs.

2

Device density

The maximum number of devices connected to one AP simultaneously is 16 (including patient monitors and other devices).

WLAN features 1

AP channel

Set the channel width to 20MHz, don’t use HT40 or even HT80.

width 2

802.11

WLAN can't use protocols that Mindray patient monitor can’t support, e.g 802.11ac

protocol

3

Security mode

WLAN can't use Security mode that Mindray patient monitor can’t support. Using WPA2-Enterprise or WPA2-PSK is recommended. Use a long password and change it 3-3

No.

Item

Content of Requirements frequently. If the hospital network supports WPA2-Enterprise, using WPA2-Enterprise can achieve higher security.

4

Dedicated VLAN

The patient monitors need to work on a dedicated VLAN. Using VLAN can minimize Broadcast or multicast data which can affect patient monitors’ stability.

Important settings

1

DHCP

The DHCP server reserves a sufficient number of IP addresses to ensure that the patient monitors can obtain an IP address.

2

IGMP snooping

If patient monitors use multicast, enable IGMP snooping

3

Multicas

If patient monitors use multicast, the multicast function of network should be enabled.

4

Beacon & DTIM

AP DTIM = 1, Beacon = 100ms

5

Service port

Refer to Mindray Patient Monitoring Network Whitepaper; patient monitors need some certain TCP/UDP ports to be opened

3.4 Network Verification 3.4.1 Tools and Resources 

Laptop computer, where Windows 7 or later version is installed and wireless network card is equipped. We recommended laptop configured with Intel Centrino Wireless-N adapter. If your laptop is configured with some other wireless adapter, please make sure the adapter has a high degree of accuracy.



Wireless network survey tool, we suggest to use professional survey tool such as tamograph, Wirelessmon or other professional network survey tool.



Professional network engineer.

NOTE 

The personnel who implement the Wi-Fi network survey should be well trained about Wi-Fi. If professional network engineers are not available, please ask some third party for help.

3.4.2 Wi-Fi Signal Calibration Before a wireless network survey tool (running on laptop computer) is used to test network coverage, follow this procedure to calibrate the RSSI of wireless network survey tool with a patient monitor

1.

Keep the patient monitor and wireless network survey tool close. The distance between them is not greater than 30cm and the distance from human body is above 50 cm.

2.

Move the patient monitor and Wireless network survey tool at the same time (keep the previous distance).

3.

When the patient monitor reads the following RSSI values: -50 dBm, -60 dBm, -70 dBm and -80 dBm, record the RSSI values read by Wireless network survey tool.

4.

Calibrate the RSSI of Wireless network survey tool to patient monitor when do site survey (the RSSI of Patient monitor is the benchmark to wireless coverage).

3-4

3.4.3 Network Verification Process This part is completed through two ways: First the hospital completes items requiring self-check of the hospital’s IT Dept, as indicated in the Network Verification Table. Then customer service personnel or authorized party confirms items on site and finally completes the Network Acceptance Table. If any item is found incompliant during network Verification test, adjustment should be made before the patient monitors installation. When in test, the Wi-Fi network SSID broadcast needs to be enabled to ensure that the Wi-Fi SSID can be scanned. Table 3-2 Wireless Network Acceptance Table

No.

Item

Content of Requirements

Verification Method

Wireless coverage requirements 1

Received

≥-65 dBm

Service person performs the test

signal

RSSI is the value displayed on the

by using network survey tool.

strength

patient monitor

Make sure that all expected

(RSSI)

coverage areas such as ward, corridor, toilet, stairs, and elevator are tested.

2

Co-chann

≤-20dB

Service person performs the test

el

by using network survey tool.

interferen

Make sure that all expected

ce

coverage areas such as ward, corridor, toilet, stairs, and elevator are tested.

3

Ping delay

The mean delay of PC or cell phone

Service person performs the test:

with normal Wi-Fi module is smaller

1. Connect PC or cell phone with

than 100ms and The packet lost rate

normal Wi-Fi module to AP.

shall be less than 1%.

2. Connect another PC to the LAN port where the central monitoring system is connected to. 3. Run the command” “ping –t –l 32 –w 1000 IPaddress-of -cellphone” for 10 minutes. 4. Run“ ctrl+c”.

Requirements of AP capability 1

AP

The anticipated number of devices

Service personnel get the AP

capability

connecting to one AP must be lower

model from related hospital

than 50% of the AP capability. For

people or observe directly.

example, In the coverage of one AP,

According to the model, get the

the typical number of devices

data sheet of AP to make sure the

connected to this AP is 16, then the

capability.

announced number of devices that can connect to AP simultaneously must be more than 32. The AP can create several SSIDs. 3-5

Check Results

No.

Item

Content of Requirements

Verification Method

2

Device

The maximum number of devices

Check with hospital IT if this

density

connected to one AP simultaneously

requirement is met or not.

is 12 (including patient monitors and other devices). WLAN features 1

AP

Set the channel width to 20MHz,

Check with hospital IT if this

channel

don’t use HT40 or even HT80.

requirement is met or not.

802.11

WLAN can't use protocols that

Check with hospital IT if this

protocol

Mindray patient monitor can’t

requirement is met or not.

width 2

support, e.g 802.11ac 3

Security

WLAN can't use Security mode that

Check with hospital IT if this

mode

Mindray patient monitor can’t

requirement is met or not.

support. Using WPA2-Enterprise or WPA2-PSK is recommended. Use a long password and change it frequently. If the hospital network supports WPA2-Enterprise, using WPA2-Enterprise can achieve higher security. 4

Dedicated

The patient monitors need to work

Check with hospital IT if this

VLAN

on a dedicated VLAN.

requirement is met or not.

Using VLAN can minimize Broadcast or multicast data which can affect patient monitors’ stability. Important settings 1

DHCP

The DHCP server reserves a

Check with hospital IT if this

sufficient number of IP addresses to

requirement is met or not.

ensure that the patient monitors can obtain an IP address. 2 3

IGMP

If patient monitors use multicast,

Check with hospital IT if this

snooping

enable IGMP snooping

requirement is met or not.

Multicast

If patient monitors use multicast.

Check with hospital IT if this

The multicast function of network

requirement is met or not.

should be enabled. 4

Beacon &

AP DTIM = 1, Beacon = 100ms

DTIM 5

Check with hospital IT if this requirement is met or not.

Service

Refer to Mindray Patient Monitoring

Check with hospital IT if this

port

Network Whitepaper; patient

requirement is met or not.

monitors need some certain TCP/UDP ports to be opened

3-6

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