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Products－Industrial temperature sensor－MI RTDs－Tolerance, wiring method and temperature range
Tolerance of RTDs to Temperature and Applicable Standard Table
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IEC 751
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JIS C 1604
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Class
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Tolerance (℃)
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Class
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Tolerance (℃)
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Pt100
( R(100℃) / R(0℃)=1.3851
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A
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±（0.15 +0.002|t|）
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A
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±（0.15 +0.002|t|）
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B
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±（0.3+0.005|t|）
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B
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±（0.3+0.005|t|）
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Note．
1．Tolerance is defined as the maximum allowable deviation from the temperature vs resistance reference table．
2．l t l=modulus of temperature in degrees Celsius without regard to sign．
3. Accuracy class 1/n(DIN) refers to 1/n tolerance of class B in IEC 751
Wiring method of RTDs.
Two-conductor type：
Since a conductor resistance is added to the resistance value. It is necessary to reduce the conductor resistance in advance. This type is not usually used except for a high resistance RTDs.
Three-conductor type:
Use to eliminate the effect caused by conductor resistance. Care should be taken for long. Distance transmission because a variation of resistance of conductor has an effect on accuracy. This type of connection is widely used in industrial applications.
Four-conductor type:
This type of connection is used for high-accuracy measurement and standards because it is not affected by conductor resistance. Generally, a constant current is applied and the resistance value is measured by a potential difference.
MI RTD Operating Temperature Range
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Symbol
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Division
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Operating temp range
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L
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For low temperature
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-200～ +100
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M
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For medium temperature
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0～350
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H
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For high temperature
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0～550
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