Accuracy Of The Safe Measuring Function - WIKA T32. S Serie Manual De Seguridad

2. Safety

2.6 Accuracy of the safe measuring function

The following information on the Total Safety Accuracy contains the following components:
Basic accuracy (measuring deviation from input and output, and the linearity error
■
of the transmitter)
In addition, for thermocouples, the internal cold-junction compensation (CJC),
■
except for type B thermocouples
Influence of the ambient temperature in the range -50 ... +85 °C
■
The defined value for the Total Safety Accuracy for this instrument depends on the
chosen sensor type, and the configured measuring span (see following table).
Up to the minimum spans given in the table, the Total Safety Accuracy is 2 % of the
measuring range with respect to the current output signal of 16 mA.
Otherwise, the absolute values given directly in the table are valid.
CAUTION!
The measuring span is the difference between the full scale value and the
initial value of a measuring range.
Sensor Permissible
type sensor range
for the accuracy
specifications
Pt100 -200 ... +850 °C
JPt100 -200 ... +500 °C
Ni100 -60 ... +250 °C
Pt1000
-200 ... +850 °C
Pt500
Pt25
Pt10
TC type T -150 ... +400 °C
TC typeL -150 ... +900 °C
TC type U -150 ... +600 °C
TC type E -150 ... +1000 °C
TC type J -150 ... +1200 °C
TC type K -140 ... +1200 °C
TC type N -150 ... +1300 °C
TC type R +50 ... +1600 °C
TC type S +50 ... +1600 °C
TC type B +500 ...+1820 °C
WIKA safety manual temperature transmitter T32.xS
Min. span for
2 % total safety
accuracy
84 K
50 K
21 K
69 K
70 K
134 K
241 K
134 K
138 K
136 K
164 K
176 K
197 K
154 K
255 K
273 K
283 K
Absolute total
safety accuracy for
small measuring
spans
2 K
2 K
2 K
3 K
5 K
3 K
4 K
6 K
11
GB