DAQ using NI 4497

[barisdogan]

Hi Everyone this Baris From Turkey

I have NI4497 daq card for reading Voltage from sensors. I am using MAX to configure it. One of the Channel Aio is connected to the Sensor and when I measure it with a voltmeter I am reading 3.4V then when I try to measure same sensor for using MAX software in the test Panel I am getting same voltage but on the DAQ task for import it to the Signalexpress... While I run the task the value staring from 3.4 v going the as you can see on the picture.

Why Voltage Value going Down?

For Voltage must use DC what should I do?

Please Help me.. 

[crossrulz]

Did you configure the channel to be DC coupled?  It looks AC coupled to me.  The specification claims that the 4497 has channel selectable coupling.

[barisdogan]

Yeah i think it looks like AC coupling when i Open the Test Panel  i return the Coupling AC to DC but is there any way to change it DC Coupling

[Brad_K]

Hi Baris,

What version of NI-DAQmx are you using? In NI-DAQmx 9.5 and later the DAQ Assistant allows selecting DC coupling for the NI 4497.

Brad