Performance Characteristics; Operating Conditions: Environment - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FMI51, FMI52
Endress+Hauser
10.2.4 Fail-safe mode
Minimum/maximum quiescent current safety can be switched at the electronic insert (for FEI53
and FEI57S only at Nivotester FTCxxx)
MIN = minimum safety: The output switches safety-oriented when the probe is uncovered
(signal on alarm). For use for dry running protection and pump protection for example
MAX = maximum safety: The output switches safety-oriented when the probe is covered
(signal on alarm). For use with overfill protection for example
10.2.5 Switching delay
At electronic inserts FEI52, FEI54, FEI55, the switching delay can be set in steps between 0.3 s and
10 s. At electronic inserts FEI53 and FEI57S, these settings are made at the additional Nivotester
FTCxxx switching unit.
10.3

Performance characteristics

10.3.1 Reference operating conditions
• Temperature: +20 °C ±5 °C
• Pressure: 1013 mbar abs. ±20 mbar
• Humidity: 65 % ±20%
• Medium: Tap water (conductivity ≥ 180 µS/cm)
10.3.2 Switch point
Reproducibility: 0.1 % (related to the probe length)
10.3.3 Influence of ambient temperature
Electronic insert
< 0.06 % / 10 K related to the full scale value
Separate housing
Change in capacitance of connecting cable 0.015 pF/m per K
10.4

Operating conditions: Environment

10.4.1 Ambient temperature range
• Ambient temperature of the transmitter: –50 °C to +70 °C (observe derating; see Page 73 ff.)
• A weather protection cover should be used when operating outdoors in strong sunlight. For
additional information on the protective cover, refer to the chapter on "Accessories".
10.4.2 Storage temperature
–50 °C to +85 °C
10.4.3 Climate class
DIN EN 60068–2–38/IEC 68–2–38: test Z/AD
Technical data
71