RTD Numerical Challenge – Can You Solve It? RTD calculations are one of the most common instrumentation interview and troubleshooting questions. Understanding the relationship between temperature and resistance helps engineers perform accurate calibration, testing, and fault diagnosis in the field. In this example: R₀ = 120 Ω α = 0.00385 /°C Rₜ = 150 Ω Using the RTD equation: Rₜ = R₀ (1 + αt) we can calculate the process temperature and understand how resistance changes with temperature. Remember: For a PT100 RTD, resistance increases as temperature increases. This positive temperature coefficient is what makes RTDs highly accurate and reliable for industrial temperature measurement. Did you get the correct answer before checking the solution? Share your answer and calculation method in the comments! Follow our page for more instrumentation numericals, PLC logic challenges, calibration tips, and automation knowledge. Post navigation Bernoulli’s Principle Explained What is SPAN in Instrumentation?
