How to connect pulse oximeter to DAQ 6008

What is needed to connected a Nellcor Pulse Oximeter for a adult finger to a DAQ 6008?

In order to connect any type of sensor, you need to know what sort of signal that the sensor is putting out. The 6008 has some basic analog inputs and static digital. I've only worked with the actual instruments. The various sensors often have a proprietary interface to the instrument and i'm not sure how much information is available on the sensors themselves. Perhaps you can check the biomedical forum to see if anyone has reversed engineered some sensors. If you can get some actual specs of sensors, it will be simple to say whether you can use a DAQ device to read them.

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:-) I heard that problem before. Is it possible that we disscused this subject some time earlier?
Well, but to your problem. How many counts do you get per second in average? I work/worked at a similar problem to analyse the counts from a 2D-detector. I tried the VI mentioned above but it was never able to analyse 1000 counts per second as a order of magnitude.
Which shape has your pulses? Are they NIM or square shaped? How stable is your underground and of which order of magnitude is it? How fast is your DAQ board? Because according to the Nyquist theorem you will need a sampling rate of approx. 1MS/s to resolve them properly!
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How to connect a USB-6008 with lookout6.0?

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Hi Manal there is a way to do this, DAQ or DAQmx drivers have an OPC server, you can find the detailed information in the next link
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What type of signal does your ARM board transmit?
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Taking pulse output from DAQ

Hi
I am working on 'wireless sum tracker module' project using LABVIEW; but I don't know how can I provide pusle to my circuit using LABVIEW.I was wondering if you can help me in this issue. please if possible tell me how can I connect my circuit to DAQ card to get pule.
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Monireh V
Solved!
Go to Solution.

Hello Monireh,
To give you the precise solution we would need more inputs from you.\
But considering some assumptions from my side If you are using the Desktop PC for the project and If you are thinking of the DAQ card then,
You can go with the mulit-function DAQ cards which have pulse generation capabilities.
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Bobjojo,
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Without spending too much time looking at the documentation, from using previous similar transducers, the primary two connections you are concerned with are the "+output" and the "ground". The other connections are also important, but aren't directly the concern of the Data Acquisition Hardware. The "+output" produces a variable dc voltage relative to the "ground" input that is a product of the applied pressure, with the maximum output voltage, as shown on the chart, indicating maximum pressure. So you would connect those, through a suitably shielded, moderately short length, wire to the "DAQ" analog input. You will also have to supply the transducer with it's required + supply voltage at pin 2 "vs", and the power supplie's negative to the ground. There are whitepapers on this NI site about connecting to data acquistion hardware and I strongly suggest reading them a couple of times as well as anything online you can find. Writing the DAQ software, in LabVIEW or whatever, can be trivial compared to making the correct, low noise, connections to sensor hardware.
I didn't read how the offset adjustment signal is produced or its use, figure it is designed to allow you to "tune out" some signal offset caused by differences between sensors of a type (they will not all have the same "fullscale output" as indicated in the chart).
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Acr8.tmp.pdf ‏331 KB

Without spending too much time looking at the documentation, from using previous similar transducers, the primary two connections you are concerned with are the "+output" and the "ground". The other connections are also important, but aren't directly the concern of the Data Acquisition Hardware. The "+output" produces a variable dc voltage relative to the "ground" input that is a product of the applied pressure, with the maximum output voltage, as shown on the chart, indicating maximum pressure. So you would connect those, through a suitably shielded, moderately short length, wire to the "DAQ" analog input. You will also have to supply the transducer with it's required + supply voltage at pin 2 "vs", and the power supplie's negative to the ground. There are whitepapers on this NI site about connecting to data acquistion hardware and I strongly suggest reading them a couple of times as well as anything online you can find. Writing the DAQ software, in LabVIEW or whatever, can be trivial compared to making the correct, low noise, connections to sensor hardware.
I didn't read how the offset adjustment signal is produced or its use, figure it is designed to allow you to "tune out" some signal offset caused by differences between sensors of a type (they will not all have the same "fullscale output" as indicated in the chart).
As you proceed, please keep asking.
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Regards

Thank you for your response.
I am including all of the requested information:
1. The LabView vi
2. .txt data output file (open in notepad)
3. A picture of an example setup I am using to test the triggering system (note, this is one of several setups that all have the same triggering issue)
I'm certain the connections are not the problem considering the simplicity of the test circuit as shown in the attached image.
I have my DAQ-6008's ai3 port hooked up to the voltage input (the battery pack as shown in the picture, E.G.). Normally, the ai3 port would be connected to a binary sensor that ouputs either a 5v output or a 0v output depending on the presence of an object. As you can see in the vi, I am attempting to compare each of the incoming ai3 voltages to a value (4.5); if the incoming voltage rises from 0V to above 4.5V, a true signal is outputted and the trigger should activate once by incrementing the wheel count once. The problem presents itself here by incrementing the wheel count randomly even if a constant voltage source remains above the 4.5 threshold value. You can see in the data file that all of the values are 5.208543. Again, this constant voltage is exemplified by the battery pack in the picture. There is no random incrementing if the voltage source remains at 0V.
Attachments:
ME481 DAQ WORK 10.vi ‏110 KB
IMG_20111128_131137.jpg ‏777 KB
test_11-11-28_1300.txt ‏694 KB

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8:16 pm Sunday; January 19, 2014
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How to connect pulse oximeter to DAQ 6008

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