WIKA RTD Zusatzinformation Seite 15

3. Commissioning, operation
3.5.3 Possible installation methods with the marking II 2G Ex ia IIC T1 ... T6 Gb or
II 2D Ex ia IIIC T65 ... T125 °C Db
Zones 1, 2 or zones 21, 22
Thermowell
TWxx
Thermowell
TWxx
3.5.4 Partition for use in zone 0 or zone 1/2 or separation between hazardous area
and non-hazardous area
If the wall thickness is less than 1 mm, the instrument must also be marked with an
"X" or a safety instruction in accordance with 29.2 of IEC/EN 60079-0, with the special
proviso that for safe use it must not be subjected to ambient stresses that may have an
adverse effect on the partition. If the partition is continuously subjected to vibrations (e.g.
vibrating membranes), its fatigue limit at the maximum amplitude must be stated in the
documentation (see section 4.2.5.2, IEC/EN 60079-26).
Observe the special conditions (see chapter 4 "Special conditions of use (X conditions)",
point 5).
Alternatively, a thermowell of suitable minimum wall thickness may be used by the
customer. For this, observe the special conditions (see chapter 4 "Special conditions of use
(X conditions)", point 6).
WIKA additional information RTD and TC, intrinsically safe designs (Ex i)
Process
connection
Compression
fitting
welded
Process
connection
Connection head/
Field case
Hazardous area
Tx10-H
Tx10-A
Option:
with built-in
transmitter
e.g. T32
Tx10-H
Tx10-A
Tx10-C
Tx10-D
Tx10-A
Tx10-B
Tx10-C
Tx10-A
Non-hazardous area
Associated
electrical equipment
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
EN
15