User manual

Transducer Conversion

Functions

This chapter describes the NI-DAQ Transducer Conversion functions.

NI-DAQ includes source code for these functions.

The Transducer Conversion functions convert analog input voltages read

from thermocouples, RTDs, thermistors, and strain gauges into

temperature or strain units:

RTD_Convert

Supplied single-voltage and

voltage-buffer routines convert voltages

read from an RTD into resistance and

then into temperature in units for Celsius,

Fahrenheit, Kelvin, or Rankine.

Strain_Convert

Supplied single-voltage and

voltage-buffer routines convert voltages

read from a strain gauge into measured

strain using the appropriate formula for

the strain gauge bridge configuration

used.

Thermistor_Convert

Supplied single-voltage and

voltage-buffer routines convert voltages

read from thermistors into temperature.

Thermocouple_Convert

Supplied single-voltage and

voltage-buffer routines convert voltages

read from B-, E-, J-, K-, N-, R-, S-, or

T-type thermocouples into temperature in

Celsius, Fahrenheit, Kelvin, or Rankine.

NI-DAQ installs the source files for these functions in the same directories

as the example programs. You can cut and paste, include, or merge these

conversion routines into your application source files in order to call the

routines in your application.