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APPLICATION NOTE
SCA11H BED SENSOR INSTALLATION GUIDE
Murata Electronics Oy SCA11H Doc.No. 2077
www.murata.com Rev. 3
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Table of Contents
1 SCA11H product content .................................................................................................. 3
2 SCA11H operation modes ................................................................................................ 4
2.1 Configuration mode ...................................................................................................... 4
2.2 Local communication mode .......................................................................................... 4
2.3 Cloud communication mode ......................................................................................... 5
3 SCA11H user interface ..................................................................................................... 5
4 SCA11H installation .......................................................................................................... 6
4.1 Positioning SCA11H into the bed ................................................................................. 6
4.2 Setting SCA11H into configuration mode ..................................................................... 8
4.3 Configuration .......................................................... ............................ .......................... 8
4.4 Calibration ................................................................................................................... 13
4.5 Completing configuration ................. .... .... .... ... .... ........ .... .... .... .... .... .... ... ........ .... .... .... . 15
5 Testing the output of SCA11H ....................................................................................... 16
6 Care instructions and safety utilization ........................................................................ 16
7 Declarations ..................................................................................................................... 16
8 Appendixes ...................................................................................................................... 17
9 Change Control ............................................ ....... .... .... .... .... .... ........ .... .... .... ... .... ........ .... . 20
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1 SCA11H product content
Figure 1. SCA11H-C01
BCG sensor node
Power adapter
o 9V/500mA switching power supply with 2.1/5.5 mm plug.
o Four different power plugs are supported according to the table below.
Product type Note www.iec.ch/worldplugs
SCA11H-A01
AC-adapter type A
US, Canada, Mexico and Japan…
SCA11H-P01 AC-adapter type A
China
SCA11H-C01 AC-adapter type C
Europe, South America and Asia…
SCA11H-G01 AC-adapter type G
UK, Ireland, Malta, Malaysia,
Singapore…
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2 SCA11H operation modes
2.1 Configuration mode
In configuration mode SCA11H creates its own network.
Following configurations and settings can be made using configuration WEB page.
1. Communication – local vs cloud
2. BCG measurement related settings
3. Network settings
4. BCG-calibration
2.2 Local communication mode
In local communication mode SCA11H connects to pre-defined WiFi network.
SCA11H sensor node works as TCP/IP-server and writes output data in ASCII-
format in the defined IP-address port 8080
Simple Service Discovery Protocol SSDP is used for device discovery.
Sensor node can be calibrated and maintained using the HTTP API according to
Product Specification 1424 SCA11H Hostless WLAN HTTP API Specification.
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Figure 2. Configuration WEB page
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2.3 Cloud communication mode
In cloud communication mode SCA11H connects to the pre-defined WiFi network and
sends data to pre-defined server.
Communication parameters can be set through the configuration mode.
SCA11H sensor node sends data to the server as HTTP POST message. HTPP
POST body contains XML-formatted BCG data according to Product Specification
1325 SCA11H cloud server interface specification.
Simple Service Discovery Protocol SSDP is used for device discovery.
Sensor node can be calibrated and maintained using the HTTP API according to
Product Specification 1424 SCA11H Hostless WLAN HTTP API Specification.
3 SCA11H user interface
After initialization with the attachment plate LEDs on the top indicate the following
functions:
1. Power (green)
Blinking: connecting to network
Static on: connected to network
2. Network (orange)
Flash: network traffic (transmission or reception)
3. Status (green)
Flash: BCG data transmission
After initialization without the attachment plate (approx. 10s) LEDs indicate the following
functions:
1. Power (green)
Blinking: configuration mode
2. Network (orange)
Flash: network traffic (transmission or reception)
3. Status (green)
Off
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Figure 3. SCA11H User Interface
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4 SCA11H installation
4.1 Positioning SCA11H into the bed
Positioning of SCA11H is very important. Please note two main items:
1. Orientation of the SCA11H needs to be the same as printed on top of the
node (head to toes)
2. SCA11H measures the bed vibration caused by blood circulation and
therefore it needs to be positioned in a place most optimal to measure this
vibration.
3. If bed's vibration is prevented e.g. due to the bed touching the wall or due
to very rigid bed structure, there will be no vibration a nd thus no BCG
signal to measure. In this case the bed location or bed structure should be
reconsidered.
Figure 4 depicts possible positioning options for SCA11H.
4. Under the mattress pad. Do not place under a person but rather on the
side or edge of the mattress. The recommended distance to the person to
be measured is min 20 cm.
5. On the bed frame or
6. On the side of the bed
In addition the socket-outlet shall be installed near the equipment and shall be easily
accessible.
More examples for good positioning of SCA11H are shown in Figure 5.
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Figure 4. Position options for SCA11H
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Figure 5. Examples of good SCA11H attachment positions
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4.2 Setting SCA11H into configuration mode
7. Ensure power is disconnected
8. Remove SCA11H from the attachment plate (attachment plate is the black
plate attached with magnet to actual SCA11H sensor node, please see
the figure below)
9. Plug in the power
10. Wait about 10 s until the gre en power led starts to blink with 1s interval
11. Attach SCA11H sensor node to the black attachment plate
12. After steps 1-5 SCA11H is ready for positioning and configuration.
attachment plate
Figure 6. SCA11H node without attachment plate
Flow chart for setting SCA11H into configuration mode is presented in Appendix 1.
4.3 Configuration
1. Connect the used configuration device (for example laptop) to SCA11H's
configuration network: muRata_CFG_XXXXXX using password:
24681012.
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Figure 7. Example SCA11H's configuration network.
2. Open the browser at page http://192.168.253.1
Figure 8. Start-up page
3. Select Advanced Bed Sensor Settings
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Figure 9. Advanced Bed Sensor Settings
4. Select “BCG Mode” for algorithm data output or “Data Logger Mode” for
raw data output.
5. Select “Normal” as measurement direction.
6. Click “Apply” if changes were made.
Remark: Do not modify calibration parameters manually without in-depth unde rstanding!
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Select Communication Settings tab
Figure 10. Communication Settings
7. Select “Local Mode” if you are operating in local network or “Cloud Mode”
if data is sent to a cloud server.
8. If cloud mode is selected, please follow the service provider instructions t o
configure the parameters.
9. Click “Apply” if changes were made.
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Select Network Settings tab
Figure 11. Network Settings
10. Select the local network where to connect SCA11H bed sensor node and
enter the network password.
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Select System Info tab
11. Check the country code setting is according to your area. Change, if
needed, and press “Apply”.
Flow chart for configuration and calibration using co nfiguration WEB page is shown in
Appendix 2.
4.4 Calibration
Calibration is recommended to be carried out separately for each person in bed. If the
person in bed changes, calibration should be repeated in order to obtain reliable results
for each person.
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Figure 12. Country code
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Select Bed Sensor Settings tab
Figure 13. Calibration
12. Make sure that the SCA11H is positioned as instructed in chapter 4.2, bed
is empty and it is not expose d t o di sturbance s .
13. Start the empty bed calibration by clicking the “Start” button. This takes 1
minute. In case of disturbances the calibration can be started again.
When succeeded, bed has been calibrated to the environment.
14. After empty bed calibration has been successfully performed SCA11H
can be calibrated for the occupied bed. The monitored person should lie
still on the bed and the occupied bed calibration can be started by clicking
the “Start” button. This takes also 1 minute.
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4.5 Completing configuration
Select System Info tab
Figure 14. System Info
Check the configured settings are correct. If yes, click ”Reboot to complete configuration”.
SCA11H Bed Sensor Node has now been configured.
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5 Testing the output of SCA11H
When using SCA11H the first time with the specific bed it is recommended to ensure
proper sensor position. Please use e.g. separately provided BCGDemoGUI in Data logger
mode to verify the measured raw data contains periodic signal due to pulse. If no periodic
signal can be seen, sensor position should be improved.
6 Care instructions and safety utilization
SCA11H is maintenance free. AC-adapter must be disconnected from the power when
cleaning the bed to avoid electric shock due to water or moisture.
SCA11H does not need to be reconfigured or recalibrated in case of power out.
7 Declarations
- SCA11H operating temperature range is 10 to 55 °C
- Non-authorized modification by user is prohibited.
- SCA11H sensor is not a medical device and has not been validated or approved as
such. It should not be used to diagnose or treat medical conditions.
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8 Appendixes
Appendix 1
Setting up SCA11H to the configuration mode
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Appendix 2
SCA11H Configuration and Calibration using configuration WEB page
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Appendix 3
FCC regulations
NOTICE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
NOTICE:
Changes or modifications made to this equipment not expressly approved by Murata
Manufacturing Co., Ltd. may void the FCC authorization to operate this equipment.
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the foll owing
measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and rec eiv er.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Radiofrequency radiation exposure Information:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance of
20 cm between the radiator and your body. This transmitter must not be co-located or
operating in conjunction with any other antenna or transmitter.
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9 Change Control
Rev. Date Change Description
1 25-Sep-15
2 19-Jan-17 Section 4.1 updated.
3 12-Apr-17 Section 4.3, Appendix 2 updated.
Document moved to new control system and template, updated
document references. Appendix 1 updated.
Murata Electronics Oy SCA11H Doc.No. 2077
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