RTD simulator extends PXI range

26 May 2008

Pickering Interfaces' 40-262

Pickering Interfaces is expanding its range of PXI products with the introduction of Resistance Temperature Detector (RTD) simulator.

The 40-262 is an 18-channel variable resistor module designed to simulate the operation of PT100 and PT1000 RTD’s with high resolution and accuracy in the PXI form factor. The new model promises a resistance setting resolution of better than 10m² over the entire resistance range, and an accuracy of better than 0.1% for all resistance settings.

The 40-262 uses a patented design principal that combines fine and coarse control mechanisms in combination with a calibration system. The requested resistance value is provided by the use of resistance calls (in ohms) to the module instead of the alternative approaches which are based on setting patterns of relay settings.

According to David Owen, Business Development Manager for Pickering Interfaces: “This approach saves users considerable effort in simulating variable resistance devices. Users can simply implement an interface to the simulator based on the known resistance versus temperature curve for their chosen sensor.” The module includes a calibration port that can be used to calibrate the resistor channels while the unit is connected to the UUT in a test system using an external DMM. Other versions of the 40-262 RTD simulator can be supplied that are suitable for simulating other types of sensors.

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