interfacing tools in Labview

[Dennis_Knutson]

The minimum range on the 6221 might be suitable, though. However, the 6221 is not recommended for new designs as you should have seen. Why are you even talking about it? Why are you even talking specific hardware of you don't have a specification for number of channels, sampling rate, etc.?

[anasparks777@gmail.com]

If  6221 is not recommended for new designs, then which is the DAQ card that can be used to interface a patient monitoring system to LAbview????

The patient monitoring system incorporates monitoring of the following vital parameters:

Temperature, ECG, HRV analysis, SPO2 and cufless BP (calculated by making use of pulse transit time).

The question of 6221 started because i saw that 6221 was used in one of the example problems in monitoring HRV, and I wanted to know if the same could be used for acqiring data from other parameters as well....

[Dennis_Knutson]

You need to define your data acquisition parameters. This would include total number of channels, sample rate, form factor, cost, types of measurements (i.e. voltage, current, frequency, etc.). You can plainly see what Ni recommends as a replacement but you don't appear to understand the basics.

[johnsold]

As I pointed out in your other thread no general purpose DAQ device is rated for direct patient monitoring systems.  If you have adequate, medical rated, isolated signal conditioners between the patient and the DAQ device, then any DAQ device with sufficient channels and smpling speed will probably work.

Lynn

[pandarya]

Hello,
How to interface dsp tms320c6713 with labview. Also which module are require
my project is to interfacing dsp with labvview & control any loop/proccess using labview so i confuse how to do this & main problem is which communication way are used i.e usb or emulator or any other.plz help

[altenbach]

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@pandarya wrote:
How to interface dsp tms320c6713 with labview. 

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This question is completely unrelated to the topic of this thread (which is also already marked as solved!).

You need to start a new thread in the right forum. Make sure to use a descriptive post title.

Good luck.

[Yamaeda]

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@Hooovahh wrote:

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@Yamaeda wrote:

Yes. A Thermocouple is typically a temperature dependant resistance, so all you need to do is check the resistance. You cant do that directly with the 6221, so what you'll do is put the Thermocouple in series with a fixed resistance and measure the voltage over the thermocouple, you want the fixed resistance to be the nominal (25 degree C) of the Thermocouple. Since the 6221 has AO it can supply the voltage needed. Easy as pie. (although the full extent of PI is rather hard ...)

Once connected you need to calibrate the system. If the voltage over the thermocouple is 50% of the supplied voltage, they have the same resistance and you know it's 25 degrees.

/Y

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Wait a minute, I think you are confused.  A thermocouple generates a voltage, not resistance, which is then measured by an analog input.  This voltage is in the sub-millivolts range.  The 6221 is a +/-10V with 16 bit range so each count is about .3mV which you might think is enough but real world says it won't be.  Here is a table for voltage on a K type thermocuple.

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Quite right, i confused the two. However it should be possible to measure with the 6221 as it in its 0.2V range has a sensitivity of 5.2uV

(http://sine.ni.com/ds/app/doc/p/id/ds-15/lang/sv#header0) 

/Y

[Yamaeda]

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@Hooovahh wrote:

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@Yamaeda wrote:

Yes. A Thermocouple is typically a temperature dependant resistance, so all you need to do is check the resistance. You cant do that directly with the 6221, so what you'll do is put the Thermocouple in series with a fixed resistance and measure the voltage over the thermocouple, you want the fixed resistance to be the nominal (25 degree C) of the Thermocouple. Since the 6221 has AO it can supply the voltage needed. Easy as pie. (although the full extent of PI is rather hard ...)

Once connected you need to calibrate the system. If the voltage over the thermocouple is 50% of the supplied voltage, they have the same resistance and you know it's 25 degrees.

/Y

---

Wait a minute, I think you are confused.  A thermocouple generates a voltage, not resistance, which is then measured by an analog input.  This voltage is in the sub-millivolts range.  The 6221 is a +/-10V with 16 bit range so each count is about .3mV which you might think is enough but real world says it won't be.  Here is a table for voltage on a K type thermocuple.

---

Quite right, i confused the two. However it should be possible to measure with the 6221 as it in its 0.2V range has a sensitivity of 5.2uV

(http://sine.ni.com/ds/app/doc/p/id/ds-15/lang/sv#header0)

/Y