42
APPENDICES
Appendix 1 Accuracy
Accuracy of the RTD input module
The accuracy () is calculated from the following formula.
A
C
+ AL
RTD
• Allowance of Pt100 (JIS C 1604-1997, IEC 751:1983)
• Allowance of JPt100 and Pt50 (JIS C 1604-1981)
• Allowance of Ni100 (DIN 43760 1987)
A
C
: Conversion accuracy
AL
RTD
: Allowance of the resistance temperature detector used
Class Allowance
A (0.15 + 0.002|t|)
B (0.3 + 0.005|t|)
Class Allowance
0.15 (0.15 + 0.0015|t|)
0.2 (0.15 + 0.002|t|)
0.5 (0.3 + 0.005|t|)
Class Allowance
0 to 250 (0.4 + 0.007|t|)
-60 to 0 (0.4 + 0.0028|t|)