measuring three voltages simultaneously

[NUCLEAR LAB]

Hi,

[NUCLEAR LAB]

 First of all sorry for sending two incomplete messeges, i dont know some how the post got submitted before i planned to do so , i pressed some wrong key.

Hi,

    i am having an array of nano thermocouple,i have attached a schematic diagram. suppose when i am passing a current ,say 1 mA through the heater, it will start generating heat. my problem is to measure the corresponding voltage with respect to time from the three thermocouple simultaneously,to see at what time the voltage get saturates. again i want to increase the current and measure the same. so i want to measure the three inputs simultaneously with respect to time and i want to take the measurement each time when i change the current.i am using USB 6008. proper signal conditioning will be made.can someone give any idea of developing a program for the same using labview 7.1.

thanks in advance

GEETHA

[Dennis_Knutson]

The USB 6008 is not capable of simultaneous sampling but if a small inter-channel delay is acceptable, you just specify multiple channels in the DAQ Assistant, in a task you create in MAX, or with the DAQmx Create Channel function. The syntax with the DAQmx Physical Channel control is Dev1/ai0:2 for example for channels 0 through 3. With the assistant or MAX, you just select multiple channels when prompted.

[NUCLEAR LAB]

Hi

   Thanks for the reply but can you please tell me how much small will be the inter-channel delay

geetha

[mikeporter]

Check out this thread for some additional options...

Mike...

[NUCLEAR LAB]

Thanks a lot for the reply.I think i can go for USB- 9215.

thanks once again.

Geetha