Data Sheet
biosignalsplux 
User Manual 
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Firmware requirements 
The fNIRS sensor requires a specific biosignalsplux firmware version (v.3.4) to work. Please 
follow the instructions in chapter 8 Firmware Updates & Upgrades to learn how to check 
the current firmware version of your device and to upgrade or downgrade the firmware 
to version 3.4. if another version is currently being used on your device. 
You can download the correct firmware here (v.3.4 for SpO2 & fNIRS): 
http://biosignalsplux.com/en/software/utilities 
After checking and, if required, downgrading or upgrading your device’s firmware, remove 
your device from the OpenSignals (r)evolution device  manager and your computer’s 
Bluetooth list and reconnect your device inside OpenSignals (r)evolution. If the firmware 
change  has  been  successfully,  your  device  should  now  be  displayed  with  an  orange 
biosignalsplux in your device manager (see Figure 56). 
Figure 56: biosignalsplux device panel with firmware 3.4. 
How to connect your sensor to your biosignalsplux 
The SpO2 sensor(s) have to be connected to the ground port of your device. Connecting 
this sensor to an analog input of your device will not work. 
How to configure your sensor in OpenSignals (r)evolution 
Open the OpenSignals (r)evolution device manager and select the device you have your 
SpO2 sensor connected to. 
In the device’s panel, set up channel 9 for signal acquisition, set the port (P) to 9 and the 
channel (C) to 1 and select one of the available SpO2 options in the channel’s dropdown 
menu.  The  different  options  are  designed  for  different  placement  areas  of  the  SpO2 
sensor. We recommend selecting the available configuration that fits best your needs. 
The following configurations are available: 
•  SPO2.ARM for applications where the sensor is placed on the subject’s arm 
•  SPO2.FING for applications where the sensor is placed on the subject’s finger 
•  SPO2.HEAD for applications where the sensor is placed on the subject’s head 










