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Distributed I/O System ET 200S

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Analog electronics modules<br />

4.5 Parameters for analog electronic modules<br />

Type of measurement Temperature coefficient Measuring range<br />

Two-wire thermal resistor Pt 0.003850 / Pt 0.003916 / Pt100 climatic range /<br />

Four-wire thermal resistor Pt 0.003902 / Pt 0.003920 /<br />

Pt 0.003851<br />

Pt100 standard range /<br />

Pt200 climatic range /<br />

Pt200 standard range /<br />

Pt500 climatic range /<br />

Pt500 standard range /<br />

Pt1000 climatic range /<br />

Pt1000 standard range<br />

Ni 0.006180) / Ni 0.006720 Ni100 climatic range /<br />

Ni100 standard range /<br />

Ni120 climatic range /<br />

Ni120 standard range /<br />

Ni200 climatic range /<br />

Ni200 standard range /<br />

Ni500 climatic range /<br />

Ni500 standard range /<br />

Ni1000 climatic range /<br />

Ni1000 standard range<br />

Ni 0.005000 Ni 1000 climatic range2 Ni 1000 standard range2 1 The default settings for the temperature coefficients are valid for Europe.<br />

2 For LG-Ni 1000 sensors from Siemens Building Ltd (Landis & Stäfa)<br />

Temperature coefficient<br />

The correction factor for the temperature coefficient (α-value) specifies how much the<br />

resistance of a certain material changes when the temperature is raised by 1° C.<br />

The temperature coefficient depends on the chemical composition of the material. Only one<br />

value is used in Europe for each type of sensor (default value).<br />

Additional values enable you to make a sensor-specific setting for the temperature<br />

coefficient, therefore ensuring more accuracy.<br />

See also<br />

Connecting Thermocouples (Page 4-19)<br />

<strong>ET</strong> <strong>200S</strong><br />

4-34 Manual, 12/2005, A5E00514527-03

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