WIKA TR31-3 Betriebsanleitung Seite 37

10. Information on mounting and operation in ...
Thus the entire measuring circuit (including the sensor circuit) is an "ib"
current circuit. Instruments that have been operated in a power supply
circuit of type "ib" cannot be re-used in a power supply circuit of type "ia".
10.2 Overview of the temperature zones
Model TR31-3
■
with transmitter
without neck tube
T : -40 ... +85 °C
a
Process
connection
T : -30 ... +150 °C
process
WIKA operating instructions models TR31-3, TR31-K (Ex i)
without transmitter
without neck tube
T : -50 ... +85 °C
a
Process
connection
T : -50 ... +150 °C
process
with transmitter
with neck tube
T : -40 ... +85 °C
a
T : -40 ... +85 °C
a
Process
connection
T : -30 ... +250 °C
process
without transmitter
with neck tube
T : -50 ... +85 °C
a
T : -50 ... +150 °C
a
Process
connection
T : -50 ... +250 °C
process
EN
37