Acquiring data with a Lab jack

[MDiekroeger]

I am having trouble finding a program that works with lab jack instead of a data acquisition. I installed the software for it, and I found a program that does exactly what I want only with a DAQvi, and I was wondering how I can apply it to the lab jack.

Thanks,

Melissa

[MickeyD]

Hi Melissa,

The DAQ example you saw will not be able to work with the lab jack device.  I looked at the lab jack page though and it appears they have a pre built set of LabVIEW VIs for some of their product lines.

I assume you have installed the LabJack drivers, but on the following page there is also a LabVIEW LJUD.zip file, which I believe will get you a set of VIs that you can program with in LabVIEW.
http://www.labjack.com/labjack_u3_downloads.php

If you have any further questions be sure to let me know which LabJack device you are using, so I can better support you, but you are going to need to use a tool that looks at the LabJack driver and not the DAQmx driver.

Have a great day,

Michael D
Applications Engineering
National Instruments

[LabJackSupport]

Perhaps also describe what you want the software to do, and we can point you to the closest examples in the LabVIEW_LJUD archive.

[FIRASHABEEB]

I HAVE LABJACK U3 LV , I HAVE PROBLEM AT FIO4 " THE COUNTER OF ENCODER WORK WIITHOUT ENCODER ONLY WHEN INSTLL ANY WIRE TO FIO4 CHANNEL " HOW CAN I DO NEW PROGRAM TO READ ENFODER AT OTHER CHANNEL AND LOAD CELL TOO ? 

THANKS 

[LabJackSupport]

Much of your question is related to U3 configuration rather than LabVIEW. The first timer or counter feature on the U3 will appear on the DIO# according to the TimerCounterPinOffset configuration when setting up a timer or counter. The values 4-8 are valid, meaning your first timer or counter must appear on DIO4-8 (also called FIO4-7 and EIO0). See the following related documentation:

https://labjack.com/pages/support?doc=/datasheets/u3-datasheet/29-timerscounters-u3-datasheet/

A load cell would need to be measured with an analog input channel, perhaps FIO0 set to analog input. To set FIO0 to analog, you would commonly use a command like ePut and one of the ANALOG_ENABLE IOTypes, or the eAIN function will automatically configure the given analog input channel as analog. See the following related pseudocode:

https://labjack.com/pages/support?doc=/datasheets/u3-datasheet/412-configuration-u3-datasheet/

Also see our bridge circuit app note for other recommendations. You will need amplification such as the LJTick-InAmp to take good load cell measurements with a U3:

https://labjack.com/pages/support?doc=/app-notes/sensor-types-app-note/bridge-circuits-app-note/

You would most likely set the timer and counter configurations using eTCConfig. That is what most of our timer/counter examples use. See our example archive on the following page. I would strongly recommend going through the getting started section:

https://labjack.com/pages/support?doc=/software-driver/example-codewrappers/labview-for-ud-windows/