Scaling of voltage of the thermocouple before voltage to temperature conversion

Hello

I have a module of data USB-6211 acquisition entry with Labview 8.6, and I will measure temperatures using a type R thermocouple.  Because this thermocouple voltages are very small (about 0-20 mV), I'll use an external amplifier (50 x gain) to transform the signal to 0-1 V, then read the entries using the module of data acquisition.

At this point, I can divide the signal by my (x 50) gain and use inverse polynomials for thermocouples of type R (published online: http://www.omega.com/temperature/z/pdf/z198-201.pdf) to convert pressure into a temperature.

However, I noticed that Labview has built in thermocouple modules.  There is a stage of creation of task, and the task is sent to a module that allows me to specify the thermocouple type, value CJC etc, then a sample clock, then a sampler with analog wafeform (see below).  I would use this structure, rather than coding in polynomials.   However, I can't find a way to divide my my (x 50) gain input voltage in order to give the thermocouple module reasonable voltage values.

Is there a simple way to do this, or I'm better just a coding in polynomials?

Thank you!

Amplify the signal, read the voltage, then divide by 50.

No need to code polynomials.  Search for pallets for the Subvi convert Thermocouple Reading.VI

Tags: NI Software

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