Positive compression strain measurement

Hello everyone,

Currently, I am measuring compression strain on a specimen by using Dewesoft Krypton 6xSTG. The diagram below describes the applied force direction and terminal configuration.

However, the obtained results are all positive. I also swith the terminal between In+(2) and In-(7), but when it comes to thermal expansion, the strain outcome is negative in stead of positive result.

I am looking forward to hear your advices about my task.

Thank you.

Hello Dung,

Can you write which strain gauge model do you use?

Moreover can you take a photo on how the wires are connected to the strain gauge and how to the DSUB9 connector so we can see the pinout?

BR, Matic

Hello Matic,

The strain gauge that i used is n2a-06-s1783-40b/e2/sp62, you can refer to the link: https://www.me-systeme.de/product-pdf?product_id=2996&lang=en

Unfortunately, i have sealed the strain gauge with strain gauge covering agent, but I can assure you that the connector of DSUB9 is exactly like the diagram below:

Thank you for your respond.

BR

Hello Dung,

Thank you for additional information. It still doesn't tell us enough to solve the problem.

Can we get a picture of the test, how the specimen looks like, material, shape, the size, etc, and a datafile of your measurement?

You can share this with us over https://forum.dewesoft.com/private-forum/private-support-discussion or sending to support@dewesoft.com

Best regards

Dear Matic,

I have uploaded into private support discussion, please check.

Thank you.