RTD and SPRTs Quiz

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Questions and Answers

What is the relationship between the measured voltage and RTD resistance in a two-wire design?

  • Directly proportional
  • Non-linear (correct)
  • Exponential
  • Linear

What is a key characteristic of thermistors?

  • Linear resistance change
  • Resistance change with temperature (correct)
  • Low accuracy
  • High sensitivity

How are Positive Temperature Coefficient (PTC) thermistors different from Negative Temperature Coefficient (NTC) thermistors?

  • PTC made from oxides of metals, NTC made from semiconductors. (correct)
  • PTC resistance decreases with temperature, NTC resistance increases.
  • PTC used in high-accuracy measurements, NTC in low-accuracy measurements.
  • PTC forms a barrier to electricity flow, NTC becomes conductive.

What is the range of temperature that can be measured by a typical thermistor?

<p>-40 to +150 °C (C)</p> Signup and view all the answers

What is the main reason for the use of four-wire designs in resistance measurements?

<p>To minimize strain due to thermal expansion (D)</p> Signup and view all the answers

In which type of thermistor does the resistance increase with increasing temperature?

<p>PTC thermistor (C)</p> Signup and view all the answers

What type of device is an RTD?

<p>Positive temperature coefficient (A)</p> Signup and view all the answers

What is the accuracy level that can be achieved with industrial RTDs?

<p>+0.1°C (D)</p> Signup and view all the answers

What distinguishes Standard Platinum Resistance Thermometers (SPRTs) from regular RTDs?

<p>Ultra-high accuracy (A)</p> Signup and view all the answers

Why have Platinum Wire RTDs (PRTs) established themselves as the industry standard for temperature measurement?

<p>They are suitable for use as a secondary standard (A)</p> Signup and view all the answers

What is the temperature range for Platinum Wire RTDs (PRTs)?

<p>-200 to 800 °C (D)</p> Signup and view all the answers

Why is Thin-Film RTD design gaining favor?

<p>Lower cost (B)</p> Signup and view all the answers

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