Endress+Hauser LPGmass, Руководство пользователя

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LPGmass
14 Hauser
SI units
DN 1:1 1:10 1:20 1:50 1:100 1:500
[mm] [kg/h] [kg/h] [kg/h] [kg/h] [kg/h] [kg/h]
8 2 000 200 100 40 20 4
15 6 500 650 325 130 65 13
25 18 000 1 800 900 360 180 36
40 45 000 4 500 2 250 900 450 90
50 70 000 7 000 3 500 1 400 700 140
US units
DN 1:1 1:10 1:20 1:50 1:100 1:500
[inch] [lb/min] [lb/min] [lb/min] [lb/min] [lb/min] [lb/min]
³⁄₈ 73.50 7.350 3.675 1.470 0.735 0.147
½ 238.9 23.89 11.95 4.778 2.389 0.478
1 661.5 66.15 33.08 13.23 6.615 1.323
1½ 1 654 165.4 82.70 33.08 16.54 3.308
2 2 573 257.3 128.7 51.46 25.73 5.146
Accuracy of outputs
The output accuracy must be factored into the measured error if analog outputs are used, but
can be ignored for fieldbus outputs (e.g. Modbus RS485, EtherNet/IP).
The outputs have the following base accuracy specifications.
Repeatability o.r. = of reading; 1 g/cm 3 = 1 kg/l; T = medium temperature
Base repeatability
Mass flow
±0.10 % % o.r.
Volume flow
±0.15 % % o.r.
Design fundamentals →  15
Density
±10 kg/m³ (±0.01 SGU)
Temperature
±0.25 °C ± 0.0025 · T °C (±0.45 °F ± 0.0015 · (T–32) °F)
Response time • The response time depends on the configuration (damping).
• Response time in the event of erratic changes in the measured variable (mass flow only): After
100 ms → 95 % of full scale value
Influence of medium
temperature
Mass flow
When there is a difference between the temperature for zero point adjustment and the process
temperature, the typical measured error of the sensor is ±0.0003 % of the full scale value/°C
(±0.00015 % 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.
o.r. = of reading