Endress+Hauser HART Proline Promass 83, Руководство по эксплуатации

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Technical data Proline Promass 83
128 Hauser
Flow values (example)
Repeatability
Design fundamentals
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128.
• Mass flow and volume flow (liquids): ±0.05% o.r.
• Mass flow (gases): ±0.25% o.r.
• Density (liquids): ±0.00025 g/cm
3
• Temperature: ±0.25 °C ± 0.0025 · T °C; ±0.5 °F ± 0.0015 · (T - 32) °F
Influence of medium temperature
When there is a difference between the temperature for zero point adjustment and the
process temperature, the typical measured error of the sensor is ±0.0002% of the full scale
value / °C (±0.0001% of the full scale value/°F).
Influence of medium pressure
The table below shows the effect on accuracy of mass flow due to a difference between
calibration pressure and process pressure.
Design fundamentals
Dependent on the flow:
• Flow
≥
Zero point stability ÷ (Base accuracy ÷ 100)
– Max. measured error: ±Base accuracy in % o.r.
– Repeatability: ± ½ · Base accuracy in % o.r.
• Flow < Zero point stability ÷ (Base accuracy ÷ 100)
– Max. measured error: ± (Zero point stability ÷ measured value) · 100% o.r.
– Repeatability: ± ½ · (Zero point stability ÷ measured value) · 100% o.r.
Turn down Flow Maximum measured error
[kg/h] [lb/min] [% o.r.]
250 : 1 72 2.646 2.50
100 : 1 180 6.615 1.00
25 : 1 720 26.46 0.25
10 : 1 1800 66.15 0.10
2 : 1 9000 330.75 0.10
Design fundamentals
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128
DN
[mm] [inch] [% o.r./bar]
8 3/8 –0.002
15 ½ –0.006
25 1 –0.005
40 1½ –0.005
50 2 –0.005
Base accuracy for
Mass flow liquids 0.10
Volume flow liquids 0.10
Mass flow gases 0.50