I am using the SCXI modules from NI for the first time.I'm currently trying to ,measure strain using rosette triaxial (0/45/90)strain gauges .
Your post mentions the 1320 terminal block, but I'll assume you're using the 1314 as mentioned in the title of the post (the 1320 is indended for temperature measurement modules).
Here's a screenshot from 1520 User's Manual showing how to connect QB I, please make sure you have your circuit wired exactly as shown:
In the above, diagram, R3 is the QB completion resistor--the 1314 is the only terminal block that would have this built-in (1314T does not provide R3).
So, after you verify that you are using the 1314 and it is conected as above, I would check your software configuration of the 1520. For example, are you on the lowest voltage range setting (-10 mV to 10 mV)? Is the excitation set for 10V? Again, I would refer to the 1520 manual for a more information about all of these settings.
There is something that isn't quite adding up, if the above suggestions don't help could you please post your software configuration so we can investigate further.
As John stated above, each channel inside of the 1314 terminal block has to be manually configured (wired) for the specific bridge type you're plugging in.
For single 1/4 bridge strain gages you must jumper together QTR/SCA and P-/SCA at the terminal blocks. Do this for each 1/4 bridge sensor you're pluggin in.
Also check to make sure there are no bent pins on the back of the 1314 terminal block.
I use Signal Express so I'm not familiar with your procedure to shunt strain channels. In SigEx there's a strain gage wizard that shows whether the shunt calibration and null offset was sucessful or not. Are you getting any other errors during your shunt cal?