5
(Example)
RTD to be used: Pt100, Class A
Detecting range: From -200 to 850
Ambient temperature:40 (0 to 55 )
The degree of accuracy for measured temperature value at 800
as follows.
(
Accuracy of measured
temperature value
)
=
(
Degree of
conversion
accuracy
)
+
(
Degree of tolerance of RTD
(Refer to Table 2.3.)
)
=
(
1.40
)
+
( ( (0.15 +0.002 800 ) )
=
3.15
Because the resolution is 0.1
=
3.2
t:Measured temperature
Table 2.3 Degree of tolerance of RTD
Resistance
thermometer detector
Class
Tolerance
Pt100
(JIS C 1604-1997)
A
(0.15+0.002 t )
B
(0.3+0.005 t )
JPt100
(JIS C 1604-1981)
0.15
(0.15+0.0015 t )
0.2
(0.15+0.002 t )
0.5
(0.3+0.005 t )
Ni100
(DIN 43760 1987)
0 to 250
(0.4+0.007 t )
-60 to 0
(0.4+0.0028 t )
