Endress+Hauser Proline Prowirl 73 Manual

TI064D/06/en/03.05
50106388
Technical Information
Proline Prowirl 73
Reliable Flow Measurement of Gas, Steam and Liquids.
Two-Wire Saturated Steam Mass Flowmeter.
Application
For universal volume or mass flow measurement of
steam, water (according to IAPWS-IF97 ASME), natural
gas (according to AGA NX-19), compressed air and other
liquids or gases.
Maximum application range:
• fluid temperatures from –200 to +400 °C
• pressure ratings up to PN40/Cl300 (higher pressure
ratings in preparation)
Approvals for hazardous areas:
• ATEX, FM, CSA, TIIS
Connection to all prevalent systems:
• HART, PROFIBUS PA, FOUNDATION Fieldbus
Relevant safety aspects:
• PED, SIL-1
Your benefits at a glance
Prowirl 73 offers a complete measuring point for
saturated steam or liquid mass in a single device:
mass flow is calculated from the measured variables
of volume flow and temperature in the integrated
flow computer.
For superheated steam or gas applications an external
pressure value can read in optionally, for delta heat
applications an external temperature value can be read
in.
The instrument can be ordered pre-programmed
(customer or application specific)
The Prowirl sensor is robust, reliable and proven in
more than a 100’000 applications. It offers:
• multivariable flow measurement in compact design
• high robustness against:
– vibrations (above 1 g in all axes)
– temperature shocks (>150 K/s)
– clogging fluids
– water hammer
• no maintenance, no moving parts, no zero point drift

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Function and system design
Measuring principle Vortex shedding flowmeters work on the principle of the Karman vortex street. When a fluid flows past a bluff
body vortices are alternately formed and shed and each generates a local low pressure point downstream of the
bluff body. The pressure fluctuations are detected by the sensor and converted to electrical pulses (digital sig-
nal). Within the operating limits of the device the frequency of vortices generated is directly proportional to the
volume flow.
F06-7xxxxxxx-15-xx-06-xx-000
The K-factor is used as the proportional constant:
F06-7xxxxxxx-19-xx-06-en-000
Within the application limits of the device the K-factor (calibration factor) is dependant only on its mechanical
geometry and is independent of the fluid, velocity, viscosity and density. (gas, liquid or steam)
The primary measurement signal is digital (frequency signal) and a linear function of the flow. After
manufacture the K-factor is determined during a factory calibration and once derived is not subject to zero or
long term drift.
The device does not contain any moving parts and requires no maintenance.
The DSC (Differential Swit-
ched Capsitance) sensor
The measuring sensor for a vortex flowmeter has a major influence on the performance, robustness and
reliability of the whole measuring system.
The DSC sensor of the new Prowirl 73 incorporates the experience gained from an installed base of over
100.000 vortex measurement points with the benefits of an integrated temperature sensor (PT 1000).
To ensure that the DSC sensor meets the range of demands required in today’s applications it has been burst
tested to pressures in excess of 400 bar, vibrations in excess of 1g in all axes and temperature shocks of
150 K/s.
Prowirl 73 is capable of measuring low flow rates even with low density fluids and where pipe line vibrations
are present. The meter will maintain its wide turn down ratio even under conditions where vibrations of 1g
or more and frequencies up 500 Hz are experienced.
v
K-Factor = pulses
unit volume [dm³]
Due to its internal mechanical balance the DSC sensor
reads only the pressure pulses caused by the vortices and is
immune to any influence from mechanical pipe line vibra-
tions.
Thanks to its mechanical design, the capacitive sensor is
also especially resistant to temperature shocks and water
hammer in steam lines.
F06-73xxxxxx-14-05-06-en-000
Sensor
Y-Axis
X-Axis
Z-Axis
Pt 1000

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Temperature measurement In addition to the volume flow the instrument measures the temperature. This measurement is performed
by a resistance thermometer Pt 1000 located close to the process in the DSC sensor's paddle (s. fig. Pt 1000
→Page 2 ).
Flow computer The electronics of the measuring device is equipped with a flow computer. By means of this computer using
the primary measurands (volume flow and temperature) a variety of other process variables can be calculated,
e.g.:
• the mass and heat flow of saturated steam and water
• the mass and heat flow of superheated steam (at constant pressure)
• the mass and corrected volume flow of other gases (at constant pressure)
• the mass flow of any liquid
Diagnostics The device offers a wide variety of diagnostics, e.g. tracking of the temperature of media and ambient, as well
as extreme flow events etc.
Measuring system The measuring system consists of a sensor and a transmitter.
Two versions are available:
• Compact version: sensor and transmitter form a mechanical unit.
• Remote version: sensor is mounted separate from the transmitter.
Sensor
• Prowirl F (Flange version)
• Prowirl W (Wafer version)
Transmitter
• Prowirl 73
Input
Measured variable • Volumetric flow (volume flow)
is proportional to the frequency of vortex shedding after the bluff body.
• Temperature
can be available and used for the calculation of mass flow e.g..
The measured process variables volume flow and temperature or the calculated process variables mass flow,
heat flow or corrected volume flow can be configured as an output.
Measuring range The measuring range is dependant on the fluid and nominal diameter.
Start of measuring range
Depends on the density and the Reynolds number (Remin = 4'000, Relinear = 20'000).
The Reynolds number is dimensionless and indicates the ratio of a fluid's inertial forces to its viscous forces.
It is used to characterise the flow. The Reynolds number is calculated as follows:
F06-7xxxxxxx-19-xx-06-xx-000
Re = Reynolds number; Q = Flow; di = Internal diameter; m = Dynamic viscosity; r = Density
A0003239
Re =4Q·
pdi[m]·· m [Pa·s]
[m³/s] [kg/ ]·m³
r
v
DN 15...25 ®=
min.
6
r[kg/m³]
v
DN 40...300 ®=
min.
7
r[kg/m³]
[m/s] [m/s]

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Full scale value
•Gas/steam:v
max = 75 m/s (DN 15: vmax = 46 m/s)
• Liquids: vmax = 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 [ρN] 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 [QN] 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: Umax = 36 V, with 15 mA current limit, Ri= 500 W
Ex i: Umax = 30 V, with 15 mA current limit, Ri= 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
rP [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

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Can be configured as:
– Frequency output (optional): Full scale frequency 0...1’000 Hz (fmax = 1’250 Hz)
Pulse output: Pulse value and polarity can be selected,
Pulse width can be selected (0.005...10 s) Pulse frequency max. 100 Hz
– Status output: Can be configured for error messages or flow-, temperature- or pressure limit values
– Vortex frequency: Direct output of unscaled vortex pulses 0.5...2‘850 Hz
– PFM signal (pulse-frequency modulation): by external connecting with flow computer
RMC or RMC 621
PROFIBUS PA interface:
– PROFIBUS PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated
– Current consumption = 16 mA
– FDE (Fault Disconnection Electronic) = 0 mA
– Data transmission rate: supported baudrate = 31.25 kBit/s
– Signal encoding = Manchester II
– Function blocks: 4 x Analog Input, 2 x Totalizer
– Output data: Volume flow, Mass flow, Corrected volume flow, Heat flow, Temperature,
Density, Specific enthalpy, Saturated steam pressure, Z-Factor, Vortex frequency,
Electronic temperature, Reynoldsnumber, Flow velocity, Totalizer
– Input data: Pressure, Empty pipe detection (ON/OFF), Control totalizer, Display value
– Bus address adjustable via DIP-switches at the measuring device
FOUNDATION Fieldbus interface:
– FOUNDATION Fieldbus H1, IEC 61158-2, galvanically isolated
– Current consumption = 16 mA
– Signal encoding = Manchester II
– FDE (Fault Disconnection Electronic) = 0 mA
– Data transmission rate: Supported baudrate = 31.25 kBit/s
– Function blocks: 6 x Analog Input, 1 x Discrete Output, 1 x Analog Output
– Output data: Volume flow, Mass flow, Corrected volume flow, Heat flow, Temperature,
Density, Specific Enthalpy, Saturated steam pressure, Z-Factor, Vortex frequency,
Electronic temperature, Reynoldsnumber, Flow velocity, Totalizer 1 + 2
– Input data: Pressure, Empty pipe detection (ON/OFF), Reset totalizer
– Link Master (LM) functionality is supported
Signal on alarm • Current output: error response can be selected (e.g. in accordance with NAMUR Recommendation NE 43)
• Frequency output: error response can be selected
• Status output: “not conducting” in event of fault
Load
A0001921
The grey shaded area indicates the permissible load (for HART: min. 250 Ω)
The load can be calculated as follows:
RBLoad
USSupply voltage: Non-Ex = 12...36 V DC; Ex d = 15...36 V DC; Ex i = 12...30 V DC
UKl Terminal voltage: Non-Ex = min. 12 V DC; Ex d = min. 15 V DC; Ex i = min. 12 V DC
Imax Output current (22.6 mA)
00
100 100
200 200
300 300
400 400
500 500
600 600
700 700
800 800
900 900
1000 1000
1100 1100
BB
RR
[] []
10 1020 2025 2530 3036 3615 15
18 21
W
0
100
200
300
400
500
600
700
800
900
1000
1100
B
S
R
UV
[]
[]
10 20 25 30 15
18
W
Ex iEx i
W
Ex d
Ex
RB=S
(
U–U
)
Kl
max
(I – 10 )
-3 0.022
=S
(
U–U
)
Kl

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Low flow cut off Switch points for low flow cut off can be selected as required
Galvanic isolation The electrical connections are galvanically isolated from one another.
Power supply
Electrical connection
A0001897
Electrical connection Prowirl 73
a - HART: Power supply, current output
- PROFIBUS PA: 1 = PA+, 2 = PA–
- FOUNDATION Fieldbus: 1 = FF+, 2 = FF–
b Optional frequency output (not for PROFIBUS PA and FOUNDATION Fieldbus), can als be operated:
- as pulse or status output (except PROFIBUS PA and FOUNDATION Fieldbus)
- together with the flow computer RMC or RMS 621 as PFM output (pulse-frequency modulation)
c Ground terminal (relevant for remote version)
Connecting the
remote version
Note!
The remote version must be grounded. In doing so, the sensor and transmitter must be connected to the same
potential matching.
A0001893
Connecting the remote version
Supply voltage Non-Ex: 12...36 V DC (with HART 18...36 V DC)
Ex i: 12...30 V DC (with HART 18...30 V DC)
Ex d: 15...36 V DC (with HART 21...36 V DC)
PROFIBUS PA and FOUNDATION Fieldbus
Non-Ex, Ex d: 9...32 V DC
Ex i: 9...24 V DC
Current consumption → PROFIBUS PA: 16 mA, FOUNDATION Fieldbus: 16 mA
12 34
a
c
++
--
b
a
cb
d
3
GN GN
3
1
WT WT
1
4
YL YL
4
2
BN BN
2
5
GY GY
5
6
PK PK
6
7
BU BU
7
8
RD RD
8
DIFF +
DIFF +
DIFF –
DIFF –
GROUND
GROUND
+5VA
+5VA
–5VA
–5VA
TEMP 1
TEMP 1
TEMP 2
TEMP 2
TEMP 3
TEMP 3
e
f

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Cable entry Power supply and signal cables (outputs):
• Cable entry M20 x 1.5 (8...11.5 mm)
• Thread for cable entry: ½" NPT, G ½", G ½" Shimada
• Fieldbus connector
Power supply failure • Totalizer stops at the last value determined (can be configured)
• All settings are kept in the EEPROM
• Error messages (incl. value of operated hours counter) are stored
Connecting diagram for the
input of an external tempera-
ture or pressure value via
HART protocol
1. Process control system with common “positive”
A0001774
Connecting diagram for process control system with common “positive”
A) Prowirl 73
B) Cerabar-M or other HART- and burst-able pressure-, temperature, and density-transmitter
C) Active barrier RN221N
2. Process control system with common “negative”
A0001775
Connecting diagram for process control system with common “negative”
A) Prowirl 73
B) Cerabar-M or other HART- and burst-able pressure-, temperature, and density-transmitter
C) Active barrier RN221N
250
0+H 0– 0+ 0+H 0– 0+
PLC+ PLC (73) in PLC (p/T) in
AB
CC
250
0+H 0– 0+ 0+H 0– 0+
PLC–PLC (73) in PLC (p/T) in
AB
CC

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3. Connecting diagram without process control system
A0001776
Connecting diagram without process control system
A) Prowirl 73
B) Cerabar-M or other HART- and burst-able pressure-, temperature, and density-transmitter
C) Active barrier RN221N
Performance characteristics
Reference operating
conditions
Error limits following ISO/DIN 11631:
20...30 °C, 2...4 bar, Calibration rig traceable to national standards
Calibration with the corresponding process connection of the respective norms
Maximum measured error • Liquid (volume flow):
< 0.75% o.r. for Re > 20’000; < 0.75% o.f.s for Re between 4’000...20’000
• Gas/Steam (volume flow):
< 1% o.r. for Re > 20’000; < 1% o.f.s for Re between 4’000...20’000
• Temperature:
< 1 °C (T > 100 °C, saturated steam); rise time 50% (stirred under water, following IEC 60751): 8 s
• Mass flow (saturated steam):
– for flow velocity v 20...50 m/s, T > 150 °C (423 K)
< 1.7% o.r. (2% o.r. for remote version) for Re > 20’000
< 1.7% o.f.s (2% o.f.s for remote version) for Re between 4’000...20’000
– for flow velocity v 10...70 m/s, T > 140 °C (413 K)
< 2% o.r. (2.3% o.r. for remote version) for Re > 20’000
< 2% o.f.s (2.3% o.f.s for remote version) for Re between 4’000...20’000
• Mass flow (other fluids):
Depends on the quality of the pressure value specified in the device functions.
An individual error observation must be carried out.
o.r. = Of reading, o.f.s = Of full scale, Re = Reynolds number
Repeatability ±0.25% o.r. (of reading)
250
0+H 0+ 0+ 0+H 0– 0–
AB
CC

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Operating conditions: installation
Installation instructions Vortex meters require a fully developed flow profile as a prerequisite for correct volume flow measurement.
For this reason, please note the following points when installing the device:
Orientation
The device can generally be installed in any position in the piping. In the case of liquids, upward flow is prefered
in vertical pipes to avoid partial pipe filling (see orientation A).
In the case of hot fluids (e.g. steam or fluid temperature ≥200 °C), select orientation C or D so that the
permitted ambient temperature of the electronics is not exceeded.
Orientations B and D are recommended for very cold fluid (e.g. liquid nitrogen).
Orientations B, C and D are possible with horizontal installation.
The arrow indicated on the device must always point in the direction of flow in all mounting orientations.
Caution!
• If fluid temperature is ≥200 °C, orientation B is not permitted for the wafer version (Prowirl 73 W)
with a nominal diameter of DN 100 and DN 150.
• In case of vertical orientation and downward flowing liquid, the piping has always to be completely filled.
A0001869
Possible orientations of the device
Minimum spacing and cable length
Rotating the electronics housing and the display
The electronics housing can be rotated continuously 360 ° on the housing support. The display unit can be
rotated in 45 ° steps. This means you can read off the display comfortably in all orientations.
Esc
E
- +
B
D
A
C
Esc
E
- +
Esc
E
- +
We recommend you observe the following dimensions
to guarantee problem-free access to the device for
service purposes:
• Min. spacing in all directions = 100 mm (A)
• Necessary cable length L + 150 mm
A0001870
L
A
Esc
Esc
E
- +

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Piping insulation
When insulating, please ensure that a sufficiently large area of the housing support is exposed. The uncovered
part serves as a radiator and protects the electronics from overheating (or undercooling).
The maximum insulation height permitted is illustrated in the diagrams. These apply equally to both the
compact version and the sensor in the remote version.
A0001868
1 = Flanged version
2 = Wafer version
Wafer version mounting set
The centering rings supplied with the wafer style meters are used to mount and center the instrument.
A mounting set consisting of tie rods, seals, nuts and washers can be ordered separately.
F06-7xxxxxxx-09-00-06-xx-000
Mounting wafer version
1 = Nut
2 = Washer
3 = Tie rod
4 = Centering ring (is supplied with the device)
5 = Seal
12
Esc
E
- +
Esc
E
- +
1
2
3
4
5