Shaping the world with sensor solutions
ams
2020-09-01
AS7038GB/AS7038RB Evalkit
User Guide
Contents
How to use
AS703x PC Software
Safety Requirements
FW Upgrade over USB
Evaluation kits main parts
Contents of the AS7038GB/AS7038RB Evaluation kit
1. AS7038GB/AS7038RB
Sensor with LEDs
2. ECG electrodes pads
3. Microcontroller
4. USB connector
5. Connector to optional
AS7038 Wristband
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Notes: This is a picture of
showing AS7038RB only
1. Download the Evalkit Software from
https://ams.com/as7038rb#tab/tools
https://ams.com/as7038gb#tab/tools or copy from the USB stick
2. Install the Evalkit Software
3. Optionally connect electrodes to the external electrodes
connection
4. Connect the micro USB to USB cable to the board and plug it
into your computer
5. The green LED will turn ON as soon as the board is powered
6. Start the client software
Setup
Getting Started
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Note: For external ECG functionality costumer
needs to build their own cabling harness
The pinout of the electrode connection is as follows
•Select the appropriate COM port name from the drop down box
(1)
•Click the connect button
•Connect button will change its icon to upon successful
connection
•The two status boxes on the bottom right side will turn green and
show the FW number currently flashed on the board (13)
•Select AS7038G_PPG_OFE_Finger or
AS7038G_PPG_ULP_Finger from the built in configuration
presets (2)
•Optionally check and change AS703x settings
•Start the measurement with a click on the Start button
•Put the index finger on the AS7038 to measure the PPG signal
•The PPG waveform will be displayed in the PPG window of the
GUI (6)
•The Heart Rate (HRM) and Heart Rate Variability (HRV) will be
displayed on the right hand side of the window (9)
•The numbers in curly brackets show how many seconds have
passed since the last result was reported
AS703x PC Software
Starting a PPG measurement (Apply for AS7038G)
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New picture with changed preset names to be
Switched in
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•Select the appropriate COM port name from the drop down box
(1)
•Click the connect button
•Connect button will change its icon to upon successful
connection
•The two status boxes on the bottom right side will turn green and
show the FW number currently flashed on the board (13)
•Connect ECG electrodes to the electrode connection
•Select AS7038G_PPG_ECG_finger from the built in
configuration presets (2)
•Optionally check and change AS703X settings.
•Start the measurement with a click on the Start button.
•The green AS7038 LEDs will turn on, Start button’s caption will
change to Stop
•Put the index finger on the AS7038
•The PPG waveform will be displayed in the PPG window of the
GUI. (6)
•The ECG waveform will be displayed in the ECG window of the
GUI. (7)
AS703x PC Software
Starting a combined PPG/ECG measurement (Apply for AS7038G)
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•Select the appropriate COM port name from the drop down box
(1)
•Click the connect button
•Connect button will change its icon to upon successful
connection
•The two status boxes on the bottom right side will turn green and
show the FW number currently flashed on the board (12)
•Select AS7038R_SPO2_20Hz_finger or
AS7038R_SPO2_200Hz_finger from the built in configuration
presets (2)
•Optionally check and change AS703X settings.
•Start the measurement with a click on the Start button.
•The red AS7038 LEDs will turn on, Start button’s caption will
change to Stop
•Put the index finger on the AS7038
•The PPG waveform will be displayed in the pop-up window of
the GUI. (8)
•The Heart Rate (HRM) and SPO2 will be displayed on the right
hand side of the window (10)
•The numbers in curly brackets show how many seconds have
passed since the last result was reported
AS703x PC Software
Starting a SPO2 measurement (Apply for AS7038R)
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AS703x Signal optimization
Two settings have a major impact on signal strength and quality:
●LED current
●OFE gain
●TIA gain
LED current has a direct impact on signal strength with minimal impact on noise.
OFE gain will increase overall signal strength but also increase noise.
We recommend the following settings to begin with and start experimenting from there:
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Use case
LED current [mA]
OFE gain
TIA gain
Finger
0.768
4
-8
2M
-3M
Light skin wrist
2
8
7M
Dark skin wrist
5
16
7M
Saving and loading configuration
AS703x PC Software
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To save the current configuration settings, click on the File
Save Configuration menu. This will open the Save
Configuration File dialog box. Enter file name and choose the
file location, then click Save.
To load a previously exported configuration, click on the File
Load Configuration menu. This will open the Select
Configuration File dialog box. Select the configuration file from
which to load settings and click Open.
Raw data logging and exporting
AS703x PC Software
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By default, during measurement the raw data from the AS703x
is logged in memory. When a measurement is stopped, this
data can be exported to a .csv file by clicking on the File
Export Raw Data menu and selecting the file location and file
name in the Save File dialog box.
Raw data file format:
First row has the column captions
First column has the timestamp in milliseconds
The rest of the columns contain the data from the enabled
ADC channels
Safety compliance
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The AS7038 Eval Kit is supplied by USB connection to the PC.In order to avoid a direct connection from the electrodes to the power grid,
an IEC 60601-1 compliant RECOM DCDC converter (R0.25S-0505/H or R0.25S-0505/HP) is assembled on the board as well as isolator
ICs for any other signals, which means that there is no physical connection between the break out part of the board and the power grid.
Isolation (IEC 60601)
AS7038 Evalkit
Sensorboard
DC/DC
Converter and
Isolators
USB Power
Supply
•Press and hold DFU taster on the board (next to the USB
connector)
•Connect USB cable -> release DFU taster (The board is
now in DFU mode)
•Start DfuSeDemo.exe from the folder \your SW install
\ams\AS703x_Vital_Signs_Sensor\extras\DFU
• In “Upgrade or Verify Action” ,Click on Choose…, a
window will pop-up
•Find the folder with the new firmware, select the FW and
click Open
•Click Upgrade
•After FW upgrade, quit the DFU software by
disconnecting the USB cable from the board or click
“Leave DFU mode” button.
•Connect USB cable again, start the GUI. In the right
bottom corner of the GUI, the new FW version will be
shown.
AS703x Firmware upgrade
Optional FW upgrade over USB
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Thank you!
Please visit our website
www.ams.com
