Bridge correction factor

Hello everyone,

I am currently having an experiment on a full bridge strain gauge n2a-06-s1783-40b/e2/sp62.

Here are the connection diagram and sensor parameter in DewesoftX:

At the last step of lead wire compensation, when I clicked the "Compensate" button, there was a pop-up warning:

I do not understand this warning, and I also can not find any document related to this pop-up.

I am looking for your help to get rid of this problem.

Thank you.

Have a nice day.

Your #3 on the terminal block should be going to pin 8 on the D-sub otherwise it needs to be jumpered like the illustration shows in software. As it is, you're not physically connected to Exc-.

In fact all those black connector lines are jumpers at the D sub; 1/6, 5/2, 3/8.

Here's how I wire all my d subs (ignore the color abbreviations, they're not standard to anything).

Dear Lemmy,

Thanks for your answer.

I am sorry that I mistakenly typed the term (3) in the first picture, it is actually (8).

Secondly, I am using the 4-wire option in the second picture:

In the Dewesoft document, they mentioned that when I choose 4 wire option, terminal (3)-(8) are interconnected, and (1)-(6) too in the amplifier side: https://training.dewesoft.com/online/course/strain-measurement-using-strain-gage-sensors#4-and-6-wire-circuit

So, do I need to connect those term at this side:

Thank you.

You can tie them together at the terminal block temporarily, but you'll need to strip back enough of the insulator to expose the wires going to pins 3, 6 & 5 of the d sub. Then twist them together with the ones you have marked 1, 2 & 8.

For long term, the jumpers, or "interconnects" should be tied together at the pins of the dsub or, for really long runs, at the bridge to properly compensate for lead wire resistance.

I jumper all mine at the d sub connector. but our lead wires rarely exceed 30 feet.

For clarification, the interconnects are NOT inside the amplifier. You need to make these connections on the plug/cable/transducer side

You should consider getting a handful of these field-wireable dsub termial blocks https://www.amazon.com/AAOTOKK-Terminal-Adapter-Breakout-Connector/dp/B08154MRHC?th=1

They're incredibly handy for making temporary connections or "testing" pin configurations.

Dear Lemmy,

Thanks for your advices.

Dear Dung and Lemmy,

I agree with Lemmy and would like to confirm that the jumpers need to be made outside of the amplifiers on the sensor connector side.

Maybe the picture below would explain the connection:

Best regards.

Rok