IM CA310-02EN
47
RTD
Coefficient
Accuracy (1 year)
Excitation
Current Input
Range
Standard, Citation
Temperature Range
Measurement
Accuracy [°C]
Source
Accuracy [°C]
Extra
RTD
PT50
3851
-200.0°C ≤ t < 0.0°C
0.4
0.4
0.1 to 3 mA
IEC60751
0.0°C ≤ t ≤ +630.0°C
0.4+t x 0.050% 0.4+t x 0.050%
PT50G
-
-200.0°C ≤ t < 0.0°C
0.4
0.4
0.1 to 3 mA
GOST R 8.625-2006
0.0°C ≤ t ≤ +800.0°C
0.4+t x 0.050% 0.4+t x 0.050%
PT100G
-
-200.0°C ≤ t < 0.0°C
0.3
0.3
0.1 to 3 mA
GOST R 8.625-2006
0.0°C ≤ t ≤ +630.0°C
0.3+t x 0.033% 0.3+t x 0.033%
Cu50M
-
-180.0°C ≤ t < 0.0°C
0.4
0.4
0.1 to 3 mA
GOST R 8.625-2006
0.0°C ≤ t ≤ +200.0°C
0.4+t x 0.050% 0.4+t x 0.050%
Cu100M
-
-180.0°C ≤ t < 0.0°C
0.3
0.3
0.1 to 3 mA
GOST R 8.625-2006
0.0°C ≤ t ≤ +200.0°C
0.3+t x 0.033% 0.3+t x 0.033%
At the ambient temperature (Ta) of 23±5°C.
For the accuracies of other ambient temperatures (Ta<18°C, Ta>28°C), add the temperature coefficient 0.05°C/°C.
Source/measured value display resolution: 0.1°C
The above figures are accuracies through four-wire system measurement.
For accuracies through three-wire system measurement, add 1.0°C for Cu10, 0.6°C for Pt50, Pt50G, and Cu50M, and 0.3°C for other RTDs.
However, this assumes that the resistances of all cables are the same.
Assume the accuracies through two-wire system measurement to be the same as those through three-wire system measurement. However,
cable resistance are not taken into consideration.
The temperature of the terminals or binding post is balanced with the ambient temperature.
How to View the RTD Accuracy
Accuracy with respect to the measurement or source temperature (t) is expressed as constant or a linear equation of t.
Example: Accuracy for PT100 measurement value of 100.0°C = ±(0.3 + 100.0x0.033%)°C = ±0.333°C
Specifications
