Bartec R3 Series Operating Instructions Manual page 70

Instruction
66

Caution! Before working with circuits and before opening the connection
assembly within a potentially explosive area, switch off the power supply
of the circuits. Within a potentially explosive area, only the tools and
measurement equipment approved for this purpose may be used.
Maintenance

Dust deposits should be restricted or completely prevented if possible. In
order to prevent any unusual temperature rise at the dust-proof housing
caused by excessive dust deposits, clean the housing regularly.
Ambient conditions
The maximum surface temperature or the temperature class depends on

the type

the maximum ambient temperature
Type Ambient temperature
-20°C ... +60°C
R300, R301, R302,
TR40-10 -20°C ... +70°C
-20°C ... +60°C
R310, R311; R312,
R320 -20°C ... +70°C
-20°C ... +125°C
Safety instructions

Potentially explosive areas are defined under atmospheric conditions
within a temperature range from –20°C to +60°C and a pressure range
between 0.8 bar and 1.1 bar. Any operation outside these limits may
result in additional restrictions.

Make sure that any potential dust deposits do not exceed a maximum
thickness of 100 mm.
Resistance
The following plastic materials are used as sealing materials for the housing:

polybutylenterephthalate (PBT)

viton (O-rings)
Before the application, the operator has to check the resistance of these
plastic materials to the mediums existing at the place of application by also
taking into consideration the climatic ambient conditions at the place of
application (temperature, humidity..).
Operating Instructions Radiation sensors R3XX
Temperatur Maximum surface
e class IIG
temperature II D
T6
T5
T
100
T6
T5
T4 T
100
4)
1)
105°C
160°C