Mounting
18 - EN
FEX300, FEX500
SM/FEX300/FEX500/FM/CSA-EN
4.4
High temperature version
The high temperature design allows for complete thermal insulation of the sensor, up to the
maximum illustrated device height.
The pipeline and sensor must be insulated after installing the unit according to the following
illustration.
The thermal resistance of the insulation must not exceed
λ
= 0.036 W/(mK); if it does, the
thickness of the insulation must be reduced accordingly.
Fig. 11
1
Insulation
The surface temperature depends on the fluid temperature.
Model name
Maximum surface temperature
FEP325 / FEH325
FEP525 / FEH525
T 85 °C (185 °F) ... T
medium
FEP315 / FEH315
FEP515 / FEH515
T 70 °C (158 °F) ... T
medium
4.5
Protection class IP 68
For installation, see the commissioning instruction.
4.6
Information about using the device in areas with combustible dust
The device with dual-compartment transmitter housing is approved for use in potentially
explosive areas (gas and dust).
The Ex certification is provided on the name plate.
DANGER - Risk of explosion!
The dust explosion protection is also provided by the housing.
Modifications to the housing are not allowed (e.g., removing or omitting parts).
4.6.1 Maximum Allowable Surface Temperature
Model name
Maximum surface temperature
FEP325 / FEH325
FEP525 / FEH525
T 85 °C (185 °F) ... T
medium
FEP315 / FEH315
FEP515 / FEH515
T 70 °C (158 °F) ... T
medium
FET325 / FET525
T 70 °C (158 °F)
4.6.2 Minimum signal cable length
In potentially explosive atmospheres, the signal cable must measure least 5 m (16.40 ft).
G006
5
4
1
Summary of Contents for FEP315
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