User's Manual

7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 7
mmmmm
Specifications
Communication: Profibus PA
Protocol Layer 1 and 2 Profibus PA,
technology: IEC 61158-2, slave-functionality
Device Class B
Device Profile 3.0
• PC/Laptop requirements IBM-compatible
RAM ≥
64 Mbytes
Hard disk ≥
100 Mbytes
RS 232-C interface
VGA graphic card (≥ 640 x 480)
• Software for PC/Laptop Windows 95/98 or NT 4.0
SIMATIC PDM
Performance
Measured value error (under reference conditions)
• Measuring error ≤ ± 15 mm at 0.26 to 2 m distance
≤
± 5 mm at 2 to 10 m distance
≤
± 15 mm at 10 to 45 m distance
(see diagram below)
• Dead zone 0-26 cm from bottom edge of flange
• Additional contribution of ≤ 0.1 % of the measured value
Analog Output ≤ 0.05 % of full scale
• Additional Contribution of ≤ 0.05 % per 10 % deviation of UN
the Supply Voltage
• Influence of pressure ≤ 0.3 % to 10 bar without pressure correction
(air, 20°C) ≤ 2 % at 10 to 64 bar without pressure correction
• Long-term stability ≤
± 1 mm/year
• Repetitive accuracy ≤
± 1 mm at 0 to 45 m, damping ≥ 1 s
• Reference conditions
Medium Triple reflector on the main axis of the antenna main lobe
Ambient temperature 25 ± 5°C (77 ± 9°F)
Ambient pressure 1050 mbar ± 10 %
Absolute Measuring Error
5
10
15
20
Absolute measuring error [mm]
10 20 30 40
Distance from flange [m]
452
-20
-15
-10
-5
0
sitranslrd3.book Page 7 Tuesday, October 9, 2001 10:09 AM