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RTD -Thin Film RTDs

Date Added: September 03, 2013 12:17:49 PM
Author: Rajdeep Singh
Category: Science and Technology
There are two standards for platinum RTDs: The European standard and the American standard. The European standard, also known as the DIN or IEC standard, is considered the world-wide standard for platinum RTDs. This standard, DIN/IEC 60751 (or simply IEC751), requires the RTD to have an electrical resistance of 100.00 Ω at 0°C and a temperature coefficient of resistance (TCR) of 0.00385 Ω/Ω/°C between 0 and 100°C. There are three resistance tolerances for Thin Film RTDs specified in IEC60751: Class AA (Formerly 1/3B) = ± (0.1+0.0017×t) °C or 100.00 ± 0.04Ω at 0°C Class A = ± (0.15+0.002×t) °C or 100.00 ± 0.06Ω at 0°C41 Class B = ± (0.3+0.005×t) °C or 100.00 ± 0.12Ω at 0°C Also, one special class not included in DIN/IEC60751: Class 1/10B = ±1/10 (0.3+0.005×t) °C or 100.00 ± 0.012Ω at 0°C