Endress+Hauser Proline Prowirl 73 Handbuch

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.

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

DN 15...25 ®=

min.

r[kg/m³]

DN 40...300 ®=

min.

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]

T [K] · 1.013 [bar abs] [kg/Nm³] = [kg/m³] · T [K] · 1.013 [bar abs]

rP [bar abs] · 273.15 [K]

[Nm³/h] =

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)

100 100

200 200

300 300

400 400

500 500

600 600

700 700

800 800

900 900

1000 1000

1100 1100

[] []

10 1020 2025 2530 3036 3615 15

18 21

100

200

300

400

500

600

700

800

900

1000

1100

[]

10 20 25 30

Ex iEx i

Ex d

RB=S

(

U–U

)

max

(I – 10 )

-3 0.022

(

U–U

)

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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

GN GN

WT WT

YL YL

BN BN

GY GY

PK PK

BU BU

RD RD

DIFF +

DIFF –

GROUND

+5VA

–5VA

TEMP 1

TEMP 2

TEMP 3

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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–

PLC+ PLC (73) in PLC (p/T) in

250

0+H 0– 0+ 0+H 0–

PLC–PLC (73) in PLC (p/T) in

Proline Prowirl 73 F, W

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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–

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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

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

Esc

Proline Prowirl 73 F, W

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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

Esc

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