An RTD element generates heat by itself since electric currents flow in the element. If applied current exceeds the specified current , measurement errors will be bigger.
Please refer to our test data. By the construction of RTD sensor, measuring environment, and the condition, the result will be different.

MODEL	CONDITION	SELF-HEATING(℃)
		0.1mA	0.5mA	1mA	(2mA)*
CRZ-1632-100	WITHOUT MgO		0.03	0.13	0.52
	WITH MgO		0.01	0.03	0.11
CRZ-2005-100	WITHOUT MgO		0.03	0.12	0.49
	WITH MgO		0.01	0.02	0.09
CRZ-2005-1000	WITHOUT MgO	0.01	0.28	1.13	4.51
	WITH MgO	0.00	0.05	0.19	0.76

*2mA is used only for the examination. The current should not exceed specified ones for your application.
Measuring methods
STILL AIR
Without MgO : A thin film RTD element is loaded in a hollow metal protection tube(o12xt1)
With MgO : A thin film RTD element is loaded in a metal protection tube filled with MgO(o8xt1)