9.2 Performance
Reference operating conditions (in accordance with IEC 60770-1)
Ambient temperature +15 to +25 °C
Humidity 45 to 75% relative humidity
Ambient pressure 860 to 1060 mbar
Measurement accuracy (in accordance with IEC 60770-1)
Measured error (accuracy) +/- the greater of 0.15% of range or 6mm (accuracy valid from
0.25 m)
Non-repeatability ≤ 3 mm (0.12") (included in accuracy specification)
Deadband (resolution) ≤ 3 mm (0.12") (included in accuracy specification)
Hysteresis error Not applicable
Analog output accuracy (in accordance with IEC 60770-1)
Measured error (accuracy) 0.02% of 4..20 mA span (including hysteresis and non-re‐
peatability)
Non-repeatability <1 μA (included in accuracy specification)
Deadband (resolution) <1 μA (included in accuracy specification)
Hysteresis error Not applicable
Frequency 54 KHz
Measurement range
1)
● Up to 6 m (6 m device)
● Up to 12 m (12 m device)
Blanking distance 0.2 m (0.66 ft)
Update time at 4 mA <4 s
Beam angle 10° at -3 dB boundary
Temperature compensation Integrated to compensate over temperature range
Memory Non-volatile EEPROM, no battery required
1)
Reference point for measurement is the transducer face (also known as sensor reference
point).
9.3 Interface
HART Standard, integral to analog output
Configuration Local buttons, or engineering system such as Siemens SI‐
MATIC PDM (via PC)
Display (local) Multi-segment alphanumeric liquid crystal, with bar graph
(representing Level)
Technical data
9.3 Interface
SITRANS Probe LU240 with mA/HART
50 Compact Operating Instructions, 10/2018, A5E42673704-AB
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