Liquiphant S FTL70, FTL71
16
Connection and function
Connecting cables
• Electronic inserts: cross-section max. 2.5 mm
2
; strand in ferrule to DIN 46228
• Protective earth in housing: cross-section max. 2.5 mm
2
• External equipotential bonding connection on housing: cross-section max. 4 mm
2
Safety mode
Minimum/maximum residual current safety selectable on electronic insert.
(with FEL57 on Nivotester only)
Max. = maximum safety:
The output switches to the power fail response when the fork is covered
For use with overfill protection for example
Min. = minimum safety:
The output switches to the power fail response when the fork is exposed
For use with dry running protection for example
Switching time
When fork is covered: approx. 0.5 s
When fork is exposed: approx. 1.0 s
(Other switching times on request.)
Additionally configurable for PROFIBUS PA:
0.5-60 s
Switch-on behavior
When switching on the power supply, the output assumes the alarm signal.
After max. 3 s it assumes the correct switching mode (exception: FEL57)
Performance characteristics
Reference operating
conditions
Maximum measured error
Specified by mounting position: max. +/– 1mm
Repeatability
0.1 mm
Hysteresis
Approx. 2 mm
Influence of
process temperature
Max. +1.4 to –5.5 mm (–60 to +280 °C)
Influence of process density
Max. +4.8 to –3.5 mm (0.5 to 1.5 g/cm
3
)
Influence of process pressure
Max. 0 to –3.9 mm (–1 to 100 bar)
Ambient temperature: 23 °C
Process temperature: 23 °C
Process density: 1 g/cm
3
(water)
Viscosity: 1 mm
2
/s
Process pressure p
e
: 0 bar
Sensor mounting: vertical from above
Density switch: to > 0.7
L00-FTL5xxxx-06-05-xx-en-000
13
mm
Switchpoint
for
reference conditions