FIELD: measuring equipment.
SUBSTANCE: process temperature transmitter (12) is formed with, at least, one temperature sensor (32) having a plurality of wires. The temperature transmitter (12) includes a measuring circuit (26) adapted to connect with, at least, one temperature sensor (32) to provide an electrical parameter indication of, at least, one temperature sensor (32). The controller (30) is connected with the circuit (26) for measuring the indication and supplying the output signal of the process temperature. The current source (28) delivers test current simultaneously to the plurality of wires. The diagnostic circuit (70) measures the voltage response at each wire to provide diagnostic indication of the temperature sensor.
EFFECT: improving accuracy and reliability of the temperature sensor diagnostics.
20 cl, 8 dwg
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RU2601186C2 |
