Setu,
From what I have observed, there is no one-to-one VI for the Scaling Constant Tuner.vi in NI-DAQmx. However, here are some suggested CHANNEL property nodes to help you get the same functionality:
1. Analog Input >> General Properties >> Advanced >> Gain >> Gain Value
2. Analog Input >> General Properties >> Advanced >> High Accuracy Settings >> Auto Zero Mode
3. Analog Input >> General Properties >> Advanced >> Device Scaling Coefficients >> Device Scaling Coefficients
Hope this helps. Good luck with your application.