Technical Data; Input; Output; Performance Characteristics - Endress+Hauser Liquipoint FTW33 Operating Instructions Manual

Technical data

Measured variable
Measuring range
Switch output
Reference operating
conditions
Maximum uncertainty
Hysteresis
Non-repeatability
Switching delay
Switch-on time
44
17 Technical data
17.1

Input

The change in medium capacitance is detected by the electrode in contact with the process.
Detection occurs based on the medium covering the electrode.
• Standard: Water- or alcohol-based media, ε
• Extended: Oil-based media 2.4 < ε
• Device with IO-Link communication: Adjustment up to ε
for water-, alcohol- and oil-based liquids or powdered products
17.2

Output

• 2 DC-PNP outputs, freely configurable
• 1 switch output active: 200 mA connectable load (short-circuit proof)
Unlike the IO-Link standard, the SIO mode supports 200 mA
• Both switch outputs active: Connectable load of 105 mA each (short-circuit proof)
• Safety-related switching
The electrical switch opens if the point level is reached or if faults or a power outage
occur.
– Maximum point level detection (MAX): e. g. for overfill protection
– Minimum point level detection (MIN): e. g. to protect pumps from dry running
• Residual voltage: < 3 V
• Residual current: < 100 µA
17.3

Performance characteristics

The following reference conditions apply to the performance characteristics:
• Ambient temperature: 20 °C (68 °F) ±5 °C (9 °F)
• Medium: Water, conductivity approx. 200 µS/cm
±1 mm (0.04 in) in accordance with DIN 61298-2
Maximum 1 mm (0.04 in)
±0.5 mm (0.02 in) in accordance with DIN 61298-2
Switching delay time/switchback delay time of outputs
• 0.5 s when the sensor is covered (can be configured via IO-Link 0.3 to 60 s)
• 1 s when the sensor is free (can be configured via IO-Link 0.3 to 60 s)
Optional: 0.3 s; 1.5 s or 5 s when the sensor is covered and free, see product structure,
order code for "Service", option HS "Switching delay"
< 2 s (no defined switching status before this)
≥ 10
r
< 10 or media that form heavy buildup
r
> 2.4 via the IO-Link interface
r
Liquipoint FTW33
Endress+Hauser