Keithley 4440 RTD Require free download

File name 4440_RTD_Require.pdf

RTD Instrumentation Requirements By Tom Hayden and Joel Roop Keithley Instruments, Inc. Temperature measurement is vital in many processes, during product development, in safety systems and a host of other applications. For the majority of these applications, a temperature sensor in contact with a solid surface, or immersed in a fluid, can be used. The most commonly used contact sensors are thermistors, thermocouples, and RTDs (resistance temperature detectors). An RTD frequently is the sensor of choice when sensitivity and application flexibility are the most important application criteria. They can be manufactured in a variety of configurations and used for measurements covering a wide temperature range. When a 100ohms RTD is properly excited (~1mA), it will produce a 400