WIKA RTD - 7.3 Temperature Carry-over from Process; 7.3.1 Overview of Temperature Zones

3345267.08 06/2011 GB/D
26 WIKA operating instructions RTD and TC, intrinsically safe designs
GB
FF-00147.00
Tx10
Tx10 Tx40 Tx40
Option: with built-in
transmitter e.g. T32
Option:
with connector
MI line
Option:
with connector
cable
Tx10-A
Tx10-A
T3T3T3
T3
Process connection Process connection Process connection Process connection
1)
permissible temperatures at
T1: (-50) -40 °C < Ta < +300 °C
T3: (-50) -40 °C < Ta < +150 °C
T4: (-50) -40 °C < Ta < +100 °C
T4
T4
Transmitter
T4
connector
T4
connector
T1 T1 T1 T1
T4
Transmitter
: (-50) -40 °C < Ta < +85 °C
T4
connector
: (-50) -40 °C < Ta < +85 °C
1) Temperature zone undened
1) 1) 1)
7.3 Temperature carry-over from the process
A heat backow from the process that exceeds the operating temperature of the transmitter
(digital display) or housing is not permissible and must be prevented by installing suitable heat
insulation or a neck tube of suitable length.
7.3.1 Overview of the temperature zones
7. Information on mounting, operation in hazardous areas (Europe)