Safety Instructions: Zone - Endress+Hauser iTEMP TMT142 Consignes De Sécurité

TMT142
The ambient temperature range is depending on temperature class and maximum temperature
of the enclosure Txx°C, applicable to the maximum dust layer thickness of 5 mm, listed in the
following table:
Type Temperature class Ambient Temperature
TMT142 T6
T5
T4
Safety Instructions:
Installation
• Comply with the installation and safety instructions in the Operating Instructions.
• Install the device according to the manufacturer's instructions and any other valid standards
and regulations (e.g. IEC 60079-14).
• Connect the device using suitable cable and wire entries of protection type "Intrinsic safety
(Ex i)".
• The type of protection changes as follows when the devices are connected to certified
intrinsically safe circuits of Category ib: Ex ib IIC.
When connecting an intrinsically safe ib circuit, do not operate the sensor at Zone 0.
• Continuous duty temperature of the cable Ta +5 K.
• To maintain the ingress protection of the housing IP66/67 install the housing cover and cable
glands correctly.
• Close unused entry glands with sealing plugs.
• The pertinent guidelines must be observed when intrinsically safe circuits are connected
together acc. IEC/EN 60079-14 (Proof of Intrinsic Safety).
• The electrical apparatus must be integrated into the local potential equalization.
• When connecting two independent sensors make sure that the potential equalisation cables
are at the same potential.
Safety Instructions:
Zone 0
• Only operate devices in potentially explosive vapour/air mixtures under atmospheric
conditions:
-20 °C ≤ Ta ≤ +60 °C
0.8 bar ≤ p ≤ 1.1 bar
• If no potentially explosive mixtures are present, or if additional protective measures have been
taken, according to EN 1127-1, the transmitters may be operated under other atmospheric
conditions in accordance with the manufacturer's specifications.
• Associated apparatus with galvanic isolation between the intrinsically safe and
non-intrinsically safe circuits are preferred.
Endress+Hauser
-40 °C ≤ Ta ≤ +55 °C (-40 °F ≤ Ta ≤ +130 °F) T85 °C
-40 °C ≤ Ta ≤ +70 °C (-40 °F ≤ Ta ≤ +158 °F) T100 °C
-40 °C ≤ Ta ≤ +85 °C (-40 °F ≤ Ta ≤ +185 °F) T110 °C
Safety instructions
Maximum surface temperature
13