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)
For thermocouples, additionally, the internal cold junction compensation (CJC), except
■
EN
for type B thermocouples
Influence of the ambient temperature in the range -50 ... +85 °C
■
The defined value for the total safety accuracy for the safety function of this instrument
depends on the chosen sensor type and also 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 span 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 type
Pt100
JPt100
Ni100
Pt1000
Pt500
Pt25
Pt10
TC type T
TC type L
TC type U
TC type E
TC type J
TC type K
TC type N
TC type R
TC type S
TC type B
12
Permissible sensor
range for the accuracy
specifications
-200 ... +850 °C
-200 ... +500 °C
-60 ... +250 °C
-200 ... +850 °C
-150 ... +400 °C
-150 ... +900 °C
-150 ... +600 °C
-150 ... +1,000 °C
-150 ... +1,200 °C
-140 ... +1,200 °C
-150 ... +1,300 °C
50 ... 1,600 °C
50 ... 1,600 °C
500 ...1,820 °C
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
WIKA safety manual temperature transmitter T32.xS
Absolute total safety
accuracy of smaller
measuring spans
2 K
2 K
2 K
3 K
5 K
3 K
4 K
6 K