[Shimmer-users] PPG signal problem

[Alfredo Nazabal Renteria]

Hi


We have been trying to see the signal of the PPG sensor in the GSR+ expansion board using Shimmer Connect, but we are not obtaining any signal. We have tried to put the sensor on the finger and on the ear, we have activated the Enable Internal Exp Power, and we have followed all the manual instructions.


We've seen that the accelerometer signal is coupled on the PPG signal.
Is there something we are not considering?


Thanks
Alfredo

[Niamh O'Mahony]

Hi Alfredo,



First, you should confirm that the green LED on the PPG sensor is turned on
when you are streaming. If not, you do not have a secure connection between
the GSR+ expansion board and the Shimmer3 mainboard. If this is the case,
you should open up the unit, secure the connection between the two boards
and verify functionality, before carefully reattaching the top of the
plastic enclosure.



Once you are sure that the PPG sensor is physically connected and turned on,
you will find the signal on Channel A13, rather than channel A12, as was
listed in the original documentation. Apologies for the confusion caused by
this change.



If you have any further technical problems of this kind, feel free to
contact ***@shimmersensing.com.



Best regards,

Niamh



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From: shimmer-users-***@eecs.harvard.edu
[mailto:shimmer-users-***@eecs.harvard.edu] On Behalf Of Alfredo Nazabal
Renteria
Sent: 26 March 2014 14:55
To: shimmer-***@eecs.harvard.edu
Subject: [Shimmer-users] PPG signal problem



Hi


We have been trying to see the signal of the PPG sensor in the GSR+
expansion board using Shimmer Connect, but we are not obtaining any signal.
We have tried to put the sensor on the finger and on the ear, we have
activated the Enable Internal Exp Power, and we have followed all the manual
instructions.


We've seen that the accelerometer signal is coupled on the PPG signal.
Is there something we are not considering?


Thanks
Alfredo

[Alfredo Nazabal Renteria]

We have tried to see the PPG signal this morning, and that was the problem.
We can see the signal perfectly in the channel A13.

Thank you very much!

----- Original Message -----
From: Niamh O'Mahony <***@shimmersensing.com>
Date: Wednesday, March 26, 2014 6:16 pm
Subject: RE: [Shimmer-users] PPG signal problem
To: 'Alfredo Nazabal Renteria' <***@tsc.uc3m.es>, shimmer-***@eecs.harvard.edu
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Hi Alfredo,
 
First, you should confirm that the green LED on the PPG sensor is turned on when you are streaming. If not, you do not have a secure connection between the GSR+ expansion board and the Shimmer3 mainboard. If this is the case, you should open up the unit, secure the connection between the two boards and verify functionality, before carefully reattaching the top of the plastic enclosure.
 
Once you are sure that the PPG sensor is physically connected and turned on, you will find the signal on Channel A13, rather than channel A12, as was listed in the original documentation. Apologies for the confusion caused by this change.
 
If you have any further technical problems of this kind, feel free to contact ***@shimmersensing.com.
 
Best regards,
Niamh
 
----------------------------------------------------------------------------------
Niamh O'Mahony, Lead Applications Engineer

Tel:                 [phone]
Email:            ***@shimmersensing.com
Shimmer - Contact Details
Web:             www.ShimmerSensing.com
LinkedIn:      www.linkedin.com/company/Shimmer
Youtube:      www.youtube.com/user/ShimmerResearch
Facebook:   www.facebook.com/ShimmerResearch
Twitter:        @ShimmerSensing
Delicious:     www.delicious.com/ShimmerResearch
 

 
 
 

Post by Niamh O'Mahony
Sent: 26 March 2014 14:55
Subject: [Shimmer-users] PPG signal problem

 
Hi

Post by Niamh O'Mahony
We have been trying to see the signal of the PPG sensor in the GSR+ expansion board using Shimmer Connect, but we are not obtaining any signal. We have tried to put the sensor on the finger and on the ear, we have activated the Enable Internal Exp Power, and we have followed all the manual instructions.
We've seen that the accelerometer signal is coupled on the PPG signal.
Is there something we are not considering?
Thanks
Alfredo

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