- The true temperature for a 2-Wire RTD Temperature Sensor is measured while connected through a protection barier.
- The known impedance of the leads (or Barrier resistance) is subtracted from the resistance measurement before the conversion to temperature (using a look-up table).
- This UAP1081 also makes the measurement read a high value if the Sensor goes open-circuit or short-circuit.
- There are two channels of Resistance Input and the analogue output measures CH1 input unless a contact is closed between terminals 21 & 24 – then the output measures CH2.
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 uap1081a.usc
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= printable copy of application. |