Good afternoon MiamiVipul,
Thanks for contacting National Instruments with your issue, we'll try and get you up and running as quickly and efficiently as possible.
Look like you've got the right approach to your problem.
In order to integrate a property node into your code, you simply have to wire the task reference and error cluster in line with the rest of your code. I.e. after you create the task, you will have the purple task reference out as well as the pink error cluster out, wire those to the corresponding intputs on the property channel node and then wire the task and error out of the property node into the DAQmx Create Channel vi.
Have a look at the examples by going to Help > Find Examples (Browse Tab) > Hardware Input/Output > DAQmx > Analog Measurements. There are a variety of different measurement types which you can start from to give you a strong idea of the general DAQmx coding principles. Several of these also use Property Nodes. For example Acq&Graph Voltage - Int Clk-Analog Start w Hyst.vi
You mentioned you want to measure "DC signal with large DC offset", which I'm assuming is a typo, as AC coupling is of course designed to remove the DC offset so you can measure the AC signal.
Best of luck with your project.
Sincerely,
Minh Tran
Applications Engineering
National Instruments
