12
3.6
International Precision Standards ( Tolerance Grade )
It is defined as Class B and Class A as follows.
Calibration
Internation Tolerance Standards
N,I,S,T Monograph 175 Revised to IST-90,IEC 751_1983
And KS C1603-1991
Class A
Class B
Pt100
±(0.15+0.002 x t℃)
±(0.3+0.005 x t℃)
-200℃
±0.55℃
±1.3℃
-100℃
±0.35℃
±0.8℃
0℃
±0.15℃
±0.3℃
100℃
±0.35℃
±0.8℃
200℃
±0.55℃
±1.3℃
300℃
±0.75℃
±1.8℃
400℃
±0.95℃
±2.3℃
500℃
±1.15℃
±2.8℃
600℃
±1.35℃
±3.3℃
*Interdial line and standard winding method (Wiring Method)
Internal wires connect nickel lines from side temperature resistance elements
toterminal heads.
To prevent insulation and short circuit between internal wires, glass fiber is
usedfor low temperature and ceramic is used for high temperature.
