Analog out, Simulate PT100 or PT1000

[jonasbrattensborg]

Hi,

I am designing a system where I want to simulate a large number of PT100 (or PT1000) resistors. The system must be able to simulate up to 60 sensors. My goal is to design automated test equipment for a system that, among other things, shall be able to read a bunch of temperature sensors. My goal is to reach a resolution in the area of 0.1 deg C, and an accuracy of 1 deg C. After browsing NI PXI hardware, I have truble finding the proper module for the job.

The obvious solution would be to have an RTD simulator, but I can not find one with sufficient resolution / number of channels.

Another workable solution would be to have an Analog Voltage Output, 16 bit, with External Reference. However, the modules I have been looking at, have only one analog output with external reference.

Does anyone have a hardware suggestion for this application?

[santo_13]

PXIe-6739 is a great high density 64ch AO card but it lacks the external reference (fixed +-10V range) whereas the PXIe-636x series have 4 simultaneous AO with external reference support (multiple internal ranges +-10V, +-5V).

The best option is to get in touch with NI sales locally to understand your application and they would suggest the right configuration.