Endress+Hauser Proline Prowirl 73 - Page 4

Proline Prowirl 73 F, W
4 Endress+Hauser
Full scale value
•Gas/steam: v
max
= 75 m/s (DN 15: v
max
= 46 m/s)
• Liquids: v
max
= 9 m/s
Note!
By using the selection and sizing software Applicator, you can determine the exact values for the fluid you use.
You can obtain Applicator from your Endress+Hauser sales centre or on the Internet at www.endress.com.
Measuring range for gases [m³/h or Nm³/h]
In the case of gases, the start of the measuring range depends on the density. With ideal gases, the density [ρ]
or corrected density [ρ
N
] can be calculated using the following formulae:
F06-7xxxxxxx-19-xx-xx-en-002
The following formulae can be used to calculate the volume [Q] or corrected volume [Q
N
] in the case of ideal
gases:
F06-7xxxxxxx-19-xx-xx-en-003
T = Operating temperature, P = Operating pressure
Output
Outputs, general The following measured variables of a device (4...20mA / HART-version) can generally be output via the
outputs:
In addition, the calculated measured variables density, if programmed, specific enthalpy, saturation steam
pressure (for saturated steam), Z-factor and flow velocity can be displayed, if available, via the local display.
Output signal • Current output: 4...20 mA with HART, Start value, Full scale value and time constant (0...100 s) can be set,
Temperature coefficient: typically 0.005% o.r. / °C (o.r. = of reading)
• Frequency output (optional): Open collector, passive, Galvanically isolated,
Non-Ex, Ex d: U
max
= 36 V, with 15 mA current limit, R
i
= 500 W
Ex i: U
max
= 30 V, with 15 mA current limit, R
i
= 500 W
r =[kg/m³]
[kg/Nm³] · P [bar abs] · 273.15 [K]
N
r
T [K] · 1.013 [bar abs]
[kg/Nm³] =
[kg/m³] · T [K] · 1.013 [bar abs]
N
r
r
P [bar abs] · 273.15 [K]
[Nm³/h] =
N
Q
[m³/h] · P [bar abs] · 273.15 [K]Q
T [K] · 1.013 [bar abs]
Q [m³/h] =
N
[Nm³/h] · T [K] · 1.013 [bar abs]Q
P [bar abs] · 273.15 [K]
Current
output
Frequency
output
Impulse
output
Status
output
Volume flow X X X limit value*
Temperature X X – limit value
Mass flow if programmed if programmed if programmed limit value*
Standard volume flow if programmed if programmed if programmed limit value*
Heat flow (power) if programmed if programmed if programmed limit value*
Saturated steam
pressure (only for
saturated steam
pressure)
if programmed if programmed if programmed limit value*
Operating pressure
(if read in)
if programmed if programmed if programmed limit value*
* limit value for flow or totalizer