Endress+Hauser RMS621 - Appendix; System Units Definition; Flow Measurement Configuration

RMS621 Appendix
Endress+Hauser 67
11 Appendix
11.1 Definition of important system units
11.2 Flow measurement configuration
The Energy Manager processes output signals from a wide range of common flow transmitters.
•Volumetric:
Flow transmitter which outputs a signal in proportion to the operating volume (e.g. vortex, EFM,
turbine).
•Mass
Flow transmitter which outputs a signal in proportion to the mass (e.g. Coriolis).
• Differential pressure:
Flow transmitter (DPT) which outputs a signal in proportion to the differential pressure.
Volume
bbl 1 barrel, definition see ’Setup → Application’
gal 1 US gallon, corresponds to 3.7854 litres
igal Imperial gallon, corresponds to 4.5609 litres
l 1 litre = 1 dm
3
hl 1 hectolitre = 100 litres
m
3
corresponds to 1000 litres
ft
3
corresponds to 28.37 litres
Norm volume
Nm
3
Norm cubic metre (m
3
at standard conditions)
Scf Standard cubic feet (ft
3
at standard conditions)
Temperature
Conversion:
• 0 °C = 273.15 K
• °C = (°F - 32)/1.8
Pressure
Conversion:
1 bar = 100 kPa = 100000 Pa = 0.001 mbar = 14.504 psi
Mass
ton (US) 1 US ton, corresponds to 2000 lbs (= 907.2 kg)
ton (long) 1 long ton, corresponds to 2240 lbs (= 1016 kg)
Performance (heat flow)
ton 1 ton (refrigeration) corresponds to 200 Btu/m
Btu/s 1 Btu/s corresponds to 1.055 kW
Energy (heat quantity)
tonh 1 tonh, corresponds to 1200 Btu
Btu 1 Btu corresponds to 1.055 kJ
kWh 1 kWh corresponds to 3600 kJ which corresponds to 3412.14 Btu