DAQ Analog out usb 6009

[YHong]

I am using usb 6009 and c# to program a DAQ applicaiton. I have the following questions:

1) For analog input, the test range is -10V to +10V. If the pin of DAQ detects the voltage out of the range -10v to +10v, how the DAQ responses? in DAQ function, there a error message popup or some other warning happens

2) For analog output, I know we can output voltage, could we output current? if usb 6009 can do that, what is range for this current output?

3) I will use linear scaling for my analog input, but I would like to display the voltage in the pin which means I want to display the acquired value before scaling, could I do that? and also I don't want to affect the performance of my application too much, what can I do?

4) About Ni-scope library, could I use DAQ to work on that, or I need some special hardware equipments for ni-scope?

Thanks a lot

[PBear]

Hi YHong,

I’ll go through your questions one by one and give you answers that I’ve pulled off of the USB-6009 product page alongside some basic NI-DAQ knowledge.

1.)    If you input a voltage outside +-10V, you will not get any errors because your board simply can not detect voltages outside that range. If you input 15V, you will read 10V. The USB-6009 has overvoltage protection circuitry of +-35V. If you exceed these input specifications, you risk damaging your 6009.
2.)    Your analog output channels can source up to 5mA each for the 6009.
3.)    You can do custom scaling within DAQmx but when you call for a DAQmx read function, you will get the scaled data, not the pre-scaled data. You will have to either do the scaling with DAQmx and then using the known linear scale programmatically takes those values down to the pre-scaled data or do the opposite. This shouldn’t take much system resources for this conversion.
4.)    NI-SCOPE is a driver used for NI’s high speed digitizer products and does not support the 6009. You should do all programming with the NI-DAQmx API in mind.

I hope these answers help you to be successful in your applications with the USB-6009