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Temperature, RTD Ranges, and Accuracies (ITS-90)
Accuracy
Type Range °C Measure 4-Wire °C Measure 2- and 3-Wire* °C Source °C
Ni120 -80 to 260 0.2 0.3 0.2
Pt100-385 - 200 to 800 0.33 0.5 0.33
Pt100-392 -200 to 630 0.3 0.5 0.3
Pt100-JIS -200 to 630 0.3 0.5 0.3
Pt200-385 -200 to 250
250 to 630
0.2
0.8
0.3
1.6
0.2
0.8
Pt500-385 -200 to 500
500 to 630
0.3
0.4
0.6
0.9
0.3
0.4
Pt1000-385 -200 to 100
100 to 630
0.2
0.2
0.4
0.5
0.2
0.2
Resolution: 0.1 °C, 0.1 °F
Allowable excitation current (source): Ni120, Pt100-385, Pt100-392, Pt100-JIS, Pt200-385: 0.15 to 3.0 mA
Pt500-385: 0.05 to 0.80 mA; Pt1000-385: 0.05 to 0.40 mA
RTD Source: Addresses pulsed transmitters and PLCs with pulses as short as 5 ms.
* 2-wire: Does not include lead resistance.
3-wire: Assumes matched leads with a total resistance not exceeding 100 Ω.