WIKA TR12 Serie Manual De Instrucciones página 17

3. Commissioning, operation
3.6.3 Possible installation methods with the marking II 2G Ex ia IIC T1 ... T6 Gb or
II 2D Ex ia IIIC T65 °C ... T125 °C Db
Zones 1, 2 or zones 21, 22
Thermowell
TWxx
3.6.4 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 diaphragms), 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 for use (X conditions)",
point 5).
Alternatively, a thermowell of suitable minimum wall thickness may be used by the
customer. For this, the special conditions must be observed (see chapter 4 "Special
conditions for use (X conditions)", point 6).
WIKA additional information TR12/TC12, intrinsically safe designs (Ex i)
Hazardous area
Process
connection
Connection head/
Field case
Compression
fitting
Non-hazardous area
Tx12-B
Tx12-A
Option:
with built-in
transmitter
e.g. T32
Tx12-B
Tx12-A
EN
Associated
electr. equipment
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
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