7ML19985JF02 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL Page 5
mmmmm
Specifications
Specifications
Power
Bus powered Per IEC 61158-2 (PROFIBUS PA)
Current consumed 15.0 mA (General Purpose or Intrinsically Safe version)
Performance
Reference operating conditions according to IEC 60770-1
• ambient temperature +15 to +25
o
C (+59 to +77
o
F)
• humidity 45% to 75% relative humidity
• ambient pressure 860 to 1060 mbar g (86,000 to 106,000 N/m
2
g)
Measurement Accuracy (measured in accordance with IEC 60770-1)
• Maximum measured error = 5 mm (0.02") (including hysteresis and non-
repeatability)
Frequency K-band
Max. measurement range
1)
20 m (65.6 ft) except for 1.5" horn which has 10 m
(32.8 ft)
Min. detectable distance 50 mm (1.97") from end of horn
2)
Update time minimum 1 second, depending on settings for
Response Rate (2.2.6.1.) and LCD Fast Mode (4.2.).
Influence of ambient temperature <0.003% / K (average over full temperature range,
referenced to maximum range)
Dielectric constant of material measured
• dK > 1.6, horn and application dependent
3)
Memory
• non-volatile EEPROM
• no battery required.
Notes:
• Siemens Milltronics makes every attempt to ensure the accuracy of these
specifications but reserves the right to change them at any time.
1)
From sensor reference point: see
Flanged Horn
on page 9 and
Threaded Horn
Antenna with extension
on page 12.
2)
See
Horn dimensions
on page 13.
3)
For 1.5" (40 mm) horn the dK is limited to 3 unless a stillpipe is used.
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