Technical data
11.2 Performance
SITRANS LR250 (PROFIBUS PA)
180
Operating Instructions, 08/2014, A5E32221386-AC
Measurement Accuracy (measured in accordance with IEC 60770-1)
Maximum measured error
=3 mm (0.12")
1) 2) 3)
including hysteresis and non-
repeatability
Frequency
K-band
Maximum measurement range
4)
1.5" antenna
10 m (32.8 ft)
5)
2" threaded PVDF antenna
2"/DN50/50A Flanged encapsulated
antenna (FEA)
2", ISO 2852, DN50 DIN11864-
1/2/3, DN50
DIN11851,Tuchenhagen Types F
and N Hygienic encapsulated
antenna (HEA)
all other versions
20 m (65.6 ft)
Minimum detectable distance
50 mm (2") from end of antenna
6)
Update time
7)
minimum 1 second, depending on settings for
Response Rate (2.3.8.1.) and LCD Fast Mode (4.9.).
Influence of ambient temperature
< 0.003% / K (average over full temperature range,
referenced to maximum range)
Dielectric constant of material measured
dK > 1.6 [antenna and application dependent
8)
]
Memory
non-volatile EEPROM
no battery required
1)
The statistical accuracy is typically 3 mm (0.12") 90% of the time, when tested in accordance
with IEC 60770-1.
2)
Under severe EMI/EMC environments per IEC 61326-1 or NAMUR NE21, the device error
may increase to a maximum of 10 mm (0.4").
3)
For 2" threaded PVDF antenna, Flanged encapsulated antennas and Hygienic encapsulated
antennas, the maximum measured error <500 mm from the sensor reference point =25 mm (1").
4)
From sensor reference point: see Dimension drawings (Page 187) and Flanged Horn with
5)
20 m (65.6 ft) possible in a stillpipe/bypass
6)
Minimum range is antenna 50 mm (2"). See Dimension drawings (Page 187).
7)
Reference conditions: Response Rate (2.4.1.) set to FAST, LCD Fast Mode (4.9.) set to
ON.
8)
For 1.5" (40 mm) antenna and 2" (50 mm) threaded PVDF antenna, 2"/DN50/50A flanged
encapsulated antenna, and 2" ISO 2852, DN50 DIN 11864-1/2/3, DN50 DIN11851,
Tuchenhagen Types F and N hygienic encapsulated antenna the minimum dK is limited to 3
unless a stillpipe is used.
See Flanged horn antenna (Page 192).
See Flanged encapsulated antenna (3"/DN80/80A sizes and larger) (Page 198).
See Hygienic encapsulated antenna (2" ISO 2852 sanitary clamp) (Page 200).