Endress+Hauser Prowirl 70 Handbuch

Technical

Information

TI 031D/06/e

No. 50072929

Safe

•Electromagnetic compatibility accord-

ing to IEC 801 and NAMUR

•Sensor and electronics self-diagnos-

tics with alarm functions

•Proven capacitive DSC sensor:

resistant to vibration, thermal shock

and overspeeding

Flexible

•Local, manual configuration possible

with closed housing, even in hazar-

dous areas (Ex i and Ex d)

•Current output simultaneously

available with pulse, alarm or limit

output.

•Programmable current and pulse

simulation

Accurate

•Low measuring uncertainty

<1% of rate (gas/steam)

<0.75% of rate (liquids)

•Wide turndown of up to 45:1

•Every flowmeter is wet calibrated

Universal

•SMART technology permits two-way

digital communication via HART

protocol

•E+H Rackbus interface for connection

to higher level bus systems

•Meter bodies and sensors available in

a wide range of materials

•One standard, compact meter for all

fluids and the complete process

temperature range of -200...+400°C

Vortex Flow Measuring System

prowirl 70

Reliable Flow Measurement of

Gas, Steam and Liquids

Prowirl 70

Measuring System

Applications

The Prowirl vortex flowmeter measures

the volumetric flow of fluids with widely

differing characteristics:

•Saturated steam

•Superheated steam

•Gases

•Low-viscosity liquids

Applications include:

•Energy production

•Chemical and petrochemical industry

•Food processing

•OEM

Prowirl measures the volumetric flow at

operating conditions. If the process

pressure and temperature are constant,

Prowirl can be programmed to display

the flow rate in mass, thermal, or cor-

rected volume units.

In case of varying process conditions,

the universal Compart DXF 351 flow

computer calculates these values contin-

ually on the basis of signals from Prowirl

and additional pressure and/or tempera-

ture transmitters.

Measuring System

A measuring system consists of:

•Prowirl 70 transmitter

(compact or remote)

•Prowirl W, F, H, or D meter body

(see page 3)

The high performance, universal Prowirl

70 transmitter can be freely combined

with the various, proven meter body

styles. This guarantees flexibility when

matching a complete meter to specific

industrial process conditions.

Prowirl 70 Transmitter

The new Prowirl 70 transmitter has the

following features:

•Microprocessor-controlled

•Self-monitoring and diagnosis of

electronics and sensor

•Separate wiring compartment

•IP 65 protection type

•Built-in electromagnetic interference

immunity (EMC)

•Programmable meter body thermal

expansion coefficients

•4...20 mA current output

•Open collector output, configurable

for pulses, alarm or limit switch

(not with Ex d version)

•Optional digital display with bargraph

for rate and total

Local Programming

All functions can be set and all values

can be read at the meter using four

pushbuttons, even in hazardous areas,

and without opening the housing.

Prowirl is delivered factory-programmed,

but viewing or selection of the individual

functions is easily done using a simple

menu and the local display. Examples

are:

•Engineering units

•Current output functions

•Open collector functions

•Display mode (local)

•System parameters

Digital Communication

•SMART technology permits remote

programming of Prowirl 70 via HART

protocol, using the HART DXR 275

handheld.

•With the E+H Intensor protocol,

Prowirl 70 can be run with the

Commutec system, making the system

integration to Modbus, Profibus and

FIP systems possible.

Using the Commuwin II program or a

Commubox modem, the measured

values and functions can be read or

changed via a PC.

PFM

current pulse

Compart DXF 351

flow computer

RS 232

Pressure/temperature sensors

or 4...20 mA HART

Prowirl 70

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Prowirl used as indivi-

dual measuring location

or as part of a process-

control system

Meter Body

Construction

Prowirl F (Flanged, DN 15...300)

This design offers the following advant-

ages:

•An anchored and welded bluff body

assures high resistance to water

hammer in steam lines.

DN 15...150:

•Quality stainless steel casting

•Dye-penetrant tested

•Burst pressure >700 bar

•Standardised DVGW/ISO meter

lengths

DN 200...300:

Welded design, standard with slip-on

flanges.

Prowirl W (Wafer, DN 15...150)

This space saving wafer version is

centered easily with the help of a

mounting set. All nominal diameters

have the same 65 mm width (see

page 6).

Prowirl D (Dualsens, DN 15...300)

For special requirements, the Prowirl

vortex meter is available with two inde-

pendent sensors and electronics. Both

sensors are built into the same meter

body and, therefore, share the same

K factor.

Applications:

•For facilities with high redundancy

requirements.

•For processes where two separate

flowmeters would normally be re-

quired, one for control and one for

alarm purposes.

•For the measurement of liquid and

gas in the same pipeline (single phase

only), without reprogramming the

transmitter.

•For higher signal resolution over two

different measurement ranges.

Prowirl H (High Pressure DN 15...150)

Specially developed meter body and

sensor for use at high pressures and for

high safety requirements.

•Flange version (DIN: PN 64, 100, 160,

250 and ANSI: Class 600, 900, 1500)

•Butt-weld version (ANSI Class 1500)

Prowirl F

flanged

DN 15...300

Transmitter

Prowirl 70

Compact version

Prowirl 70

Remote version

Prowirl W

wafer

DN 15...150

(optional: Dualsens)

Prowirl H

high pressure

DN 15...150

(optional: Dualsens)

Meter Body

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Prowirl D

Dualsens, flanged

DN 15...300

flanged/

butt welded

Measuring system

Prowirl 70

Function Measuring Principle

The operating principle is based on the

Karman vortex street. When a fluid flows

past a bluff body, vortices are alter-

nately formed on the sides of that body

and are then detached or shed by the

flow. The frequency of vortex shedding

is proportional to the mean flow velocity

and, therefore, to the volumetric flow

(with Re > 4000).

Alternating pressure changes caused

by the vortices are transmitted via

lateral port holes in the bluff body.

The DSC sensor is located within the

bluff body and is well protected from

water hammer and temperature or

pressure shocks.

The capacitive DSC sensor detects the

pressure pulses and converts them into

electrical signals.

Vortex frequency = St •v

St= Strouhal number

v = velocity of medium

d = width of bluff body

The sensor preamplifier processes the

sinusoidal sensor signal into a flow-

proportional pulse frequency.

This is then converted by the transmitter

(or flow computer) into a standard

output signal.

The same sensor and electronics are

used for all nominal diameters, fluids,

and process temperatures. The sensor

signal is galvanically isolated in the

preamplifier from the output signal.

DSC Sensor

Vibration Compensation

With Prowirl’s DSC sensor, the general

sensitivity of vortex meters to pipeline

vibration has been eliminated. Using

primary, built-in vibration compensation,

pipeline vibration with amplitudes of up

to 1g and frequencies to 500 Hz will not

affect the measurement, regardless of

the axis of acceleration. The compensa-

tion is permanent, and no adjustments

are neccessary.

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Vortex measuring

principle

sensor connector

to electronics

sensor seal

meter body

sensor:

wetted part

bluff body

pipe stand

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DSC sensor (standard version).

The Prowirl High Pressure version is equipped with

a special titanium DSC sensor with a second contain-

ment.

Planning

and Installation

Inlet and Outlet Sections

An undisturbed flow profile is a pre-

requisite for accurate vortex flow

measurement. This can be ensured

through sufficient inlet and outlet pipe

sections.

•Inlet sections: min. 10 x DN

•Outlet sections: min. 5 x DN

Where flow disturbances such as pipe

elbows, reducers, valves, etc. are

located upstream of the vortex meter,

longer upstream pipe sections are

required.

If possible any valves should be

installed after the flowmeter.

Note:

Where two or more disturbances are lo-

cated upstream of the meter, the longest

recommended upstream pipe section is

to be observed.

Flow Conditioner

With limited space and large pipes, it is

not always possible to have the inlet

sections given above.

The specially developed perforated

plate flow rectifier can reduce the inlet

path to 10 x DN.

The flow rectifier is held between two

piping flanges and centred with the

flange bolts.

It rectifies distorted flow profiles effi-

ciently with very little pressure loss.

Flow conditioner pressure loss

calculation:

∆p [mbar] = 0.0085 ⋅ρ[kg/m3] ⋅v2[m/s]

•Example with steam:

p = 10 bar abs.; t = 240 °C ⇒ρ = 4.39 kg/m3

v = 40 m/s

∆p = 0.0085 ⋅4.39 kg/m3 ⋅(40 m/s)2=

59.7 mbar

•Example with H2O condensate (80 °C)

ρ= 965 kg/m3; v = 2.5 m/s

∆p = 0.0085 ⋅965 kg/m3⋅(2.5 m/s)2=

51.3 mbar

The following installation recommendations are to be observed when installing

Prowirl in the pipeline. In order to maintain the specified accuracy for all fluids and

process conditions, the inner diameters of the meter or meter flange and the

process piping should be identical. Specification of the correct process piping inner

diameter or standard (DIN, ANSI Schedule 10/40/80 etc.) will avoid the need for

calculated K factor corrections.

Inlet Outlet

Reduction

Expansion

90° elbow

or T-piece

2 x 90° elbows

3-dimensional

Control valve

With flow

conditioner

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Inlet and outlet piping requirements

Planning and

Installation

Installation Site

The Prowirl measuring system can

basically be mounted in any position,

although for extremes of process

temperatures, the following orientations

are recommended:

High process temperatures (e.g. steam):

•Horizontal pipeline: install according

to C or D

•Vertical pipeline: install according to A

Low process temperatures

(e.g. cryogenics):

•Horizontal pipeline: install according

to B or D

•Vertical pipeline: install according to A

Pressure and temperature transmitters

are to be positioned downstream of the

meter, so that optimum vortex shedding

is not affected (see adjacent figure).

Note!

•For liquid measurement, ensure the

pipeline is always full. Therefore, flow

should be upward in vertical pipelines.

•Install a gas separator if gas bubbles

are expected.

•Free-standing pipes subject to strong

vibration (>1g) should be supported

upstream and downstream of the

meter.

•Keep within the maximum specified

ambient and process temperatures

(see page 22).

Pipeline Insulation

Pipeline insulation is necessary to pre-

vent energy loss in hot and cryogenic

processes. When insulating Prowirl,

ensure sufficient pipe stand surface

area is exposed (see adjacent figure).

The exposed area serves as a radiator

and protects the electronics from

extreme heat or cooling. This applies

to both compact and remote versions.

Mounting Set

Accurate centering of wafer-style

meters, essential for specified accuracy,

is achieved with the use of a mounting

set which consists of:

1 Bolts

2 Washers

3 Nuts

4 Centering rings

5 Gaskets

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Orientation and process

temperature

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Pressure and temperature

transmitter location

Wafer version Flanged version

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Pipeline insulation

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Mounting set for wafer

version (Prowirl W)

Planning and

Installation

Minimum Spacing

In service cases it may be neccessary

to unplug the electronics housing from

the pipe stand. When installing, observe

the following spacing:

•Minimum space required to unplug

the electronics housing: 120 mm;

all other sides 100 mm

•Allowing 150 mm of slack cable will

permit the above without having to

disconnect the wiring.

The following minimum spacing require-

ments apply to the remote version:

•Remote transmitter housing: 50 mm

•Flow meter: 120 mm

Compact version

The housing can be rotated 340°,

permitting display viewing in all mounted

positions.

Within the housing, the display itself can

be rotated in 90° steps.

Remote version

Both the remote transmitter housing and

the meter housing can be rotated 340°.

min. 120 mm

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Minimum spacing compact version

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Electronics housing compact version

min. 120 mm

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min. 50 mm

Minimum spacing remote version

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Remote transmitter housing

Measuring Ranges,

Nominal Diameters

Selecting the Nominal Diameter

The following are used to determine the

measuring range and nominal diameter:

•Tables (e.g. for saturated steam

measuring ranges)

•Measuring range diagrams

(for superheated steam, gases, and

liquids)

•"Applicator" software

The Prowirl vortex flowmeter determines

the volumetric flow under operating

conditions (e.g. m3/h), i.e. the effective

volume at a particular operating press-

ure (e.g. 20 bar).

Gas volumes are highly dependent on

pressure and temperature.

Gas quantities are, therefore, usually

given at standard temperature and

pressure (Nm3at 1.013 bar, 0 °C)

and steam quantities in kg or tons.

Calculating the volumes under operat-

ing conditions is done using the

following equations and tables (see

following pages).

"Applicator" Design Software

All important transmitter data are

contained in this E+H software for the

most efficient design of the measuring

system. The equations used for calculat-

ing the properties of steam are the

latest available according to IAPS

(International Association for the

Properties of Steam).

The Applicator software makes light

work of the following calculations:

•Conversion of the operating volume of

gas into a corrected volume

•Conversion to the mass flow of steam

using temperature and/or pressure

variables

•Calculation with viscosity included

•Calculation of pressure drop accross

the flowmeter

•Simultaneous display of calculations

for various nominal diameters

•Determining measuring ranges

The software runs on any IBM

compatible PC.

Calculations

Flow Values

The actual values for maximum and

minimum flow depend mainly on the

following factors:

•The Reynolds number (describing the

flow condition) must be above 4000

•The fluid density determines the upper

and lower flow limits as described

below (“Minimum and Maximum

Volumetric Flow Qmin/Qmax”)

•Cavitation must be avoided (for liquids)

On the following pages different tables

are given for various typical applica-

tions. Those tables can be used as a

guideline for a first estimate of the

measuring range. Please contact your

Endress+Hauser sales organisation for

exact dimensioning of the meter for your

specific application.

Minimum and Maximum Volumetric Flow (Qmin/Qmax)

Fluid density: 1 kg/m3≤ ρ ≤ 12.0 kg/m3

•DN 15: Qmin = di2•0.0226

√ρQmax = di2•0.130

•DN 25...300: Qmin = di2•0.017

√ρQmax = di2•0.212

Fluid density: ρ> 12.0 kg/m3

•DN 15: Qmin = di2•0.022

√ρQmax = di2•0.130 for ρ ≤ 33 kg/m3

Qmax = di2•0.746

√ρfor ρ > 33 kg/m3

•DN 25...300: Qmin = di2•0.017

√ρQmax = di2•0.746

√ρ

where

ρ= density in kg/m3

Q = volumetric flow in m3/h

di = internal diameter of pipe in mm

Measuring Ranges

Meter Bodies

The following tables are given as

guideline for measuring ranges, vortex

frequency ranges and K-factors for a

typical gas (air at 0 °C and 1.013 bar)

and a typical liquid (water, at 20 °C).

Your E+H sales organisation will be

pleased to help you select and dimen-

sion a flowmeter for your specific

application.

Prowirl W (wafer)

Nominal

diameter

DIN

Air (at 0 °C, 1.013 bar)

[m3/h] Water (20 °C)

[m3/h] K-Factor

[pulses/dm3]

Qmin Qmax f-range (Hz) Qmin Qmax f-range (Hz) min/max

DN 15

DN 25

DN 40

DN 50

DN 80

DN 100

DN 150

04.0

10.6

27.7

44.3

102

171

379

25.4

150

394

630

1443

2432

5381

455.4...2903.5

183.6...2504.2

112.8...1586.9

87.4...1251.3

56.7...801.7

43.7...621.5

29.5...418.4

00.151

0.38

0.998

1.6

3.65

6.16

13.6

4.99

18.0

47.3

75.6

173

292

646

15.9...529.8

6.7...283.8

4.8...189.3

3.2...139

2.1...89

1.6...69.3

1.1...46.59

389.4...430.4

57.1...63.1

13.8...15.2

6.8...7.5

1.9...2.1

0.87...0.97

0.266...0.294

Nominal

diameter

ANSI (Sch 40)

DN 15

DN 25

DN 40

DN 50

DN 80

DN 100

DN 150

4.0

10.6

25.0

41.1

90.5

156

354

25.4

150

355

584

1287

2219

5036

455.4...2903.5

183.6...2504.2

121.5...1691.2

92.7...1314

60.5...858

46.2...657.7

30.6...434.2

0.151

0.380

0.898

1.48

3.26

5.62

12.8

4.99

18.0

42.6

70.1

154

266

604

15.9...526

6.3...278.8

4.3...188.2

3.3...146.3

2.2...95.3

1.7...73.2

1.1...48.3

389.4...430.4

57.1...63.1

16.3...18.0

7.7...8.5

2.3...2.5

1.014...1.12

0.295...0.326

Prowirl F (flange DN 15...150) / Prowirl H (high pressure DN 15...150)

Nominal

diameter

(all stan-

dards)

Air (at 0 °C, 1.013 bar)

[m3/h] Water (20 °C)

[m3/h] K-Factor

[pulses/dm3]

Qmin Qmax f-range (Hz) Qmin Qmax f-range (Hz) min/max

DN 15

DN 25

DN 40

DN 50

DN 80

DN 100

DN 150

3.94

8.8

21.6

36.1

140

319

24.9

125

308

513

1151

1994

4537

455.4...2903.5

196...2784.7

127.8...1813.8

95...1353.8

64.1...908.8

48...681.6

31.2...453.8

0.15

0.317

0.78

1.3

2.92

5.05

11.5

4.92

15.0

36.9

61.6

138

239

545

15.9...523.8

7.1...311.9

4.6...202

3.4...150.4

2.3...101.3

1.7...75.9

1.2...50.5

389.4...430.4

76.2...84.2

20.1...22.3

9.0...10.0

2.7...3.0

1.16...1.29

0.34...0.38

(The measuring ranges for DN 50 and DN 150 of the high pressure version differ

slightly from the given table values)

Prowirl F (flange DN 200...300)

Nominal

diameter

DIN

Air (at 0 °C, 1.013 bar)

[m3/h] Water (20 °C)

[m3/h] K-Factor

[pulses/dm3]

Qmin Qmax f-range (Hz) Qmin Qmax f-range (Hz) min/max

DN 200

DN 250

DN 300

627

1001

1414

8916

14218

20094

22.9...325.8

18.1...257

14.9...211

27.6

55.3

93.3

1070

1707

2412

1...36.2

1...28.6

0.98...23.5

0.125...0.138

0.0618...0.0683

0.0336...0.042

Nominal

diameter

ANSI (Sch 40)

DN 200

DN 250

DN 300

615

1000

1377

8743

14218

19575

22.5...329.2

17.3...263.9

14.5...219.7

26.8

55.5

89.7

1050

1707

2350

0.98...36.6

0.94...29.4

0.94...24.5

0.129...0.142

0.066...0.074

0.0372...0.0436

Measuring Ranges

Saturated Steam

Example of Calculation

To determine:

Measuring range for saturated steam

with a nominal diameter DN 100 at an

operating pressure of 12 bar abs. and

140 bar abs.

Calculation:

Min. and max. values for the measuring

range can be found from the following

table:

at 12 bar abs. ⇒ 395...12227 kg/h

at 140 bar abs. ⇒2642...78911 kg/h

Supplementary information from table:

•Saturated steam temp. =

188 °C (at 12 bar); 337 °C (at 140 bar)

•Density = 6.13 kg/m3(at 12 bar)

87.0 kg/m3(at 140 bar)

Operating

pressure

[bar abs.]

Measuring ranges for various nominal widths in [kg/h]*

DN 15

min...max DN 25

min...max DN 40

min...max DN 50

min...max DN 80

min...max DN 100

min...max DN 150

min...max DN 200

min...max DN 250

min...max DN 300

min...max Tsat

°C ρsat

kg/m3

0.5 2.5...7.7 5.6...38.6 13.7...95.0 22.8...158 51.2...355 88.7...616 202...1401 396...2753 632...4390 893...6205 81.3 0.31

13.4...14.7 7.7...73.9 18.9...182 31.6...303 70.8...680 123...1178 279...2680 548...5267 874...8399 1236...11870 99.6 0.59

1.5 4.2...21.5 9.3...108 22.9...266 38.1...443 85.6...994 148...1722 337...3916 663...7697 1057...12274 1494...17346 111 0.86

24.8...28.1 10.6...141 26.2...348 43.6...580 97.9...1301 170...2254 386...5126 758...10075 1209...16066 1709...22706 120 1.13

35.8...41.1 12.9...207 31.6...508 52.8...848 118...1902 205...3295 467...7496 917...14732 1462...23492 2067...33200 134 1.65

46.6...53.9 14.7...271 36.2...666 60.4...1111 136...2492 235...4317 534...9820 1050...19300 1674...30777 2366...43495 144 2.16

57.3...66.5 16.4...334 40.2...822 67.1...1370 151...3074 261...5326 593...12115 1166...23810 1859...37968 2628...53659 152 2.67

68.0...78.9 17.8...397 43.8...976 73.1...1627 164..3651 284...6325 646...14388 1271...28278 2026...45094 2863...63729 159 3.17

78.6...91.3 19.2...459 47.2...1129 78.6...1883 176...4224 306...7318 695...16646 1367...32716 2179...52170 3080...73730 165 3.97

89.1...104 20.4...521 50.2...1281 83.8...2137 188...4794 326...8305 741...18893 1456...37131 2322...59211 3281...83680 170 4.16

10 10.2...128 22.7...645 55.9...1584 93.2...2642 209...5929 326...10270 824...23362 1619...45915 2582...73219 3649...103000 180 5.15

12 11.1...153 24.8...767 61...1886 102...3146 228...7058 395...12227 899...27813 1767...54663 2817...87169 3981...123000 188 6.13

15 12.3...189 27.6...951 67.9...2338 113...3899 254...8749 440...15156 1001...34477 1967...67760 3136...108000 4433...153000 198 7.6

25 15.8...312 38.5...1567 94.6...3853 158...6425 354...14416 613...24972 1395...56807 2742...112000 4372...178000 6179...252000 224 12.5

30 17.6...382 44.1...1880 108...4621 170...7242 406...17290 703...30135 1523...64909 234 15

35 19.2...446 49.6...2196 122...5399 191...8462 456...20200 795...35209 1712...75837 243 17.5

40 21.3...511 54.9...2365 135...5815 212...9115 505...21759 880...37926 1896...81689 250 20.1

45 23.3...578 60.2...2514 148...6181 232...9688 553...23128 965...40311 2078...86826 257 22.7

50 25.4...645 65.4...2657 161...6532 252...10238 601...24442 1048...42602 2257...91760 264 25.4

64 31.0...842 79.8...3035 196...7460 307...11693 734...27914 1279...48653 2755...105000 280 33.1

80 37.4...1082 96.3...3440 237...8457 371...13255 886...31643 1544...55154 3325...119000 295 42.5

100 45.6...130.4 118...3928 289...9657 453...15137 1081...36135 1884...62982 4058...136000 311 55.4

120 54.3...1466 140...4415 344...10854 540...17013 1288...40613 2245...70788 4835...152000 325 70

140 63.9...1634 165...4922 405...12099 635...18965 1516...45274 2642...78911 5691...170000 337 87

160 74.9...1816 193...5470 475...13447 744...21078 1776...50318 3096...87704 6668...189000 347 108

180 87.7...2016 226...6075 556...14934 871...23408 2079...55881 3623...97400 7804...210000 357 133

200 102...2235 264...6734 648...16555 1061...25948 2426...61944 4229...108000 9108...233000 366 163

220 119...2465 305...7427 751...18259 1177...28619 2810...68321 4898...119000 10550...256000 374 198

* This table is given as guideline for measuring ranges of Prowirl 70 F (flanged),

and Prowirl 70 H (high pressure). Measuring range for the standard Prowirl H

high-pressure version

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