Siemens SITRANS L Series, Руководство по эксплуатации, Страница: 102 / 106

Technical data and dimensions
15.1 Technical data
Distance to installations > 200 mm (7.874 in)
Reflector Flat plate reflector
False reflections Biggest false signal, 20 dB smaller than the useful signal
Deviation with liquids
Measuring distance
> 0.25 m/0.8202 ft
≤ 2 mm
Measuring distance
≤ 0.25 m/0.8202 ft
≤ 10 mm
Non-repeatability
a
≤ 2 mm
Deviation with bulk solids The values depend to a great extent on the application. Binding
specifications are thus not possible.
a
Already included in the meas. deviation
Variables influencing measurement accuracy
Temperature drift - Digital
output
< 3 mm/10 K, max. 5 mm
Temperature drift - Current
output
< 0.03 %/10 K or max. 0.3 % relating to the 16.7 mA span
Deviation in the current
output due to digital/analogue
conversion
< 15 µA
Additional deviation through electromagnetic interference
According to NAMUR NE 21 < 80 µA
According to EN 61326-1 None
According to IACS E10
(shipbuilding)/IEC 60945
< 250 µA
Characteristics and performance data
Measuring frequency W-band (80 GHz technology)
Measuring cycle time
a
≤ 250 ms
Step response time
b
≤ 3 s
Beam angle
c
8°
a
With operating voltage U
B
≥ 24 V DC
b
Time span after a sudden distance change from 1 m to 5 m until the output signal reaches 90 % of the
final value for the first time (IEC 61298-2). Valid with operating voltage U
B
≥ 24 V DC.
c
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
Ambient conditions
Ambient temperature device -40 … +70 °C (-40 … +158 °F)
Ambient temperature display -25 … +70 °C (-13 … +158 °F)
Storage and transport
temperature
-40 … +80 °C (-40 … +176 °F)
SITRANS LR150
Operating Instructions, 08/2020, A5E50352155
93