Liquipoint T FTW 31, FTW 32
Endress + Hauser 17
Environment
Ambient temperature
range
Non-hazardous area
–40 ... 70 °C
–40 ... 60 °C (for FEW 58 NAMUR)
Storage temperature –40 ... 80 °C
Climate class Tropicalised as per DIN EEC 68, part 2-38
Degree of protection IP66
Shock resistance Practical test
Vibration resistance
(at min. rod length)
DIN 60068-2-64 / IEC 68-2-64: 20 ... 2000 Hz, 1 (m/s
2
)
2
/Hz
Electromagnetic
compatibility
•
Interference Emission to EN 61326, Electrical Equipment Class B
Interference Immunity to EN 61326, Annex A (Industrial)
•
Use for separte-instrumented probes a screened cable between the probe and the switching
unit.
For installation instructions for screened cables and general instructions for EMC inspection
conditions of E+H devices, see also TI 241F.
Process conditions
Medium temperature
limits
Permissible ambient temperature T
1
at the housing as a function of the measuring material
temperature T
2
in the vessel:
!
Note!
For separately instrumented devices (without FEW 5?) there are no restrictions in the indicated
temperature range.
Conductivity ≥ 10 µS
Limiting medium pressure
range
–1 ... 10 bar
70
50
40
30
20
10
–20–30 –10 10 30 40 50 60 7020 80 90
T
1
T
2
–10
–20
–30
0
0
T
1
T
2
60
FEW 52, FEW 54
FEW 58 (NAMUR)
100–40
–40
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