Increasing NI USB-6008 output voltage

[sunny_2012]

Hi,

Using the NI-USB 6008 device I am trying to measure and store the pressure data from a tire. The problem is that the omega make pressure sensor requires 10-15 volts DC excitation but the maximum that can be supplied from the USB 6008 device is 5 Volts. I am not sure what to do.

I tried it with the 5 volts supply from the device but I am not getting the correct readings.

[SnowMule]

....external power supply? You can pick up a wall-wart for a couple of bucks, if you don't have one laying around already. 12v is the most common/cheapest in that range.

And yeah, I doubt you'd get the right readings with 5v either.

[sunny_2012]

So, the excitation and the ground will be connected to the 12 Volt power source and the output will connect to the analog input channel?

[crossrulz]

keep in mind that the DAQ input can only handle +-10V.  So you may have to use a divider and/or use a buffer circuit.

[sunny_2012]

Hi,

The external supply worked. The output voltage in b/w 1.3 and 3.7 volts so that is also with in limits. The signal is being read in the VI. The issue now is that, I get an error 'Error -200279' in between when the VI is running (showing correct readings). I believe this is due to the timing settings I have for this task in the measurement and automation explorer. I have selected

• continuous samples
• samples to read 1k
• rate(Hz) 1k

Also in the block diagram the constant input to the wait until next ms multiple is 100.

Thanks for all the help!

[MCOTO]

Hi,

I think this link can be useful...

http://digital.ni.com/public.nsf/allkb/AB7D4CA85967804586257380006F0E62

Regards,

[sunny_2012]

Got it to work. No error . Calibrated the transducer and it works fine.

Thanks everybody!