Setting up DAQ system for testing (using pressure transducer, linear position sensor and strain gauges)

[Ganchai]

Hello,

I like to get your suggestion in setting up the DAQ system. I am very beginner in this issue.

These SCXI listed below are what we have in the laboratory. I will use DAQ card 6062E.

SCXI 1000

SCXI 1520

SCXI 1140

SCXI 1142

SCXI 1305 , 1302 , 1300

SCXI 1122

SCXI 1100

I will use linear position sensor in my experiment. But I'm not sure which SCXI shoud I connect to this sensor.

This sensor gives 4-20mA output. it requires +13 to +28Vdc excitation.

I will use pressure transducer (strain gauge type) which gives 100mV output and requires 10Vdc supply.

I will use strain gauges 350 ohm.

Regarding to the number of channels used in my experiment, I will use 1 channel of pressure transducer, 1 channel of linear position sensor and 3 or 4 strain gauges.

Could you please suggest me which SCXI should be used with pressure transducer, linear position sensor and strain gauges.

Now I'm thinking to use SCXI 1520 with strain gauges and pressure transducer. Is that ok?

But I'm not so sure on the linear position sensor which gives current output.

And regarding to sampling rate, I like to get minimum of 60-70 KS/s for pressure transducer. And around 1KS/s for linear position sensor and 1KS/s for each channel of strain gauge are enough. Can I archieve these sampling rate from the available SCXI modules mentioned before? I attached the datasheet of pressure transducer and linear position sensor for you. Please see attached files.

I'm reallly look forward for your suggestion.

Thank you in advance,

Ganchai.

[PBear]

Hi Ganchai,

I would recommend the 1520 with a 1314 terminal block for connecting your pressure transducer and strain gauge. It is designed for excitation, bridge completion and has many other features to fit these applications. For your linear position sensor, try using the 1100 module with an additional precision shunt resistor. For example, our 1308 terminal block has built in 249Ohm shunt resistors for taking current inputs for your 1100. These connections should give you the readings you would like.

As far as sampling rate goes, you should be fine with your requirements. Good luck and I hope you are succesful.