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Technical specifications
Mode of operation
Measuring principle Ultrasonic level measurement
Measuring range 0.3 ... 60 m (1 ... 200 ft)
Measuring points
SITRANS LU01: Max. one point;
SITRANS LU02 Max. two points
Output signal
Ultrasonic transducer Echomax series, ST-H transduc-
ers
Relays
4 SPDT Form C relays, rated at
5 A at 250 V AC, resistive load
mA output
0/4 ... 20 mA, optically isolated
• Max. load
750 Ω, isolated, 30 V
• Resolution
0.1 % of range
• Outputs
SITRANS LU01: Max. 1 mA output
SITRANS LU02: Max. 2 mA out-
puts
Accuracy
Error in measurement 0.25 % of range or 6 mm (0.24"),
whichever is greater
Resolution
0.1 % of measuring range or
2 mm (0.08"), whichever is
greater
Temperature compensation
-50 ... +150 ºC (-58 ... +302 ºF)
• Integral temperature sensor
• External TS-3 temperature sen-
sor (optional)
• Programmable fixed tempera-
ture
Rated operating conditions
Ambient conditions
• Ambient temperature for enclosure -20 ... +50 ºC (-4 ... +122 ºF)
Design
Weight 2.7 kg (6 lbs)
Material (enclosure)
Polycarbonate
Degree of protection (wall mount)
IP65
Electrical connection
Ultrasonic transducer cable exten-
sion
RG62-A/U coaxial cable with low
capacitance
mA output signal
2-core copper conductor, twisted,
shielded, 0.5 ... 0.75 mm²
(22 ... 18 AWG), Belden
®
8760 or
equivalent is acceptable
Electrical connection and relay
connection
Copper conductor according to
local requirements, rated 250 V
5 A
Synchronization
Up to 16 LU01/LU02 units can be
synchronized together
Power supply
AC model 100/115/200/230 V AC ± 15 %,
50/60 Hz, 31 VA
DC model
18 ... 30 V DC, 25 W
Displays and controls
51 x 127 mm (2 x 5") graphics
LCD with backlighting
Memory
EEPROM (non-volatile), no
backup battery required
Programming
Using removable programmer
(ordered separately) or
Dolphin Plus (option)
Certificates and approvals
• CE, CSA
US/C
, FM, ATEX II 3D
• Lloyd’s register of Shipping
(Categories ENV1, ENV2, ENV3
and ENV5)
Options
External temperature sensor TS-3
Communications
• SmartLinx: protocol-specific
modules as interface for popular
industrial fieldbus systems
• Dolphin Plus: Siemens Win-
dows
®
-compatible interface
and ComVerter link (infrared)
(264 Seiten)
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