Using the "1520/1314", my strain readings are erratic, why?

[sperry]

I am using the SCXI 1520/1314 for measuring strain. When I put a load on the gauge, the readings are very erratic. How do I correct this?

[Sastry V.]

Hi,

What type of noise are you seeing? random, some sort of offset etc. ?

What is the chassis and its revision that you are using? What is the revision of the SCXI-1520?

The above information will help me in figuring out if indeed there is any issue.

You may also look for the possible causes of the noise by going to www.ni.com/support and type the keywords +scxi +1520 +noise.

Sincerely,
Sastry V
Applications Engineer
National Instruments.

[sperry]

I am using a SCXI 1000 chasis Rev 2.0 and the 1520 is Rev 1.1. I have not done a lot of strain measurement tests but this data does not look right. It may not be noise as the data is not random. I have attached a test we did.