WIKA TC10-L - Manual (Page 18)

3370964.05 04/2014 GB/D/F/E
18 WIKA operating instructions models TR10-L, TC10-L (Ex d)
GB
Solid-machined thermowell
(minimum wall thickness 1 mm)
Protection tube
(minimum wall thickness 1 mm)
Without
thermowell
Legend:

Connection head

Neck tube

Connection to thermowell

Measuring insert
 Process connection
 Terminal block/transmitter
 Flame path fitting
T4
T3
T1
T
undefined
U Insertion length
NL Nominal length
N(M
H
) Neck length
Temperature class classification, ambient temperatures
A heating in the connection head can occur with built-in transmitter through faulty
electronics. The permissible ambient temperatures depend on the housings used and any
additionally-fitted head-mounted transmitter.
For all WIKA connection heads with built-in WIKA temperature transmitters, the
following interrelation is valid:
The temperature increase on the surface of the connection head or housing is less than
25 K if the following conditions are observed: power supply U
B
maximum DC 30 V when the
transmitter is operated in a current limit of 22.5 mA.
This yields the following temperature class classification:
Atmosphere Temperature class Limits for ambient temperature
Gas atmosphere T6 -50 ... +60 °C
T5 -50 ... +75 °C
T4 -50 ... +85 °C
Dust atmosphere T85 °C -50 ... +60 °C
The temperature class is dependent upon the user application and the ambient temperature.
8. Safety-related instructions