Endress+Hauser Prosonic 91W Specifications

Technical Information

Proline Prosonic Flow 91W

Ultrasonic Flow Measuring System Flowrate measurement for standard applications with drinking water and process water

Applications

The sensors are perfectly suited for the non-contact measurement of pure or slightly contaminated liquids, regardless of the pressure or electrical conductivity.

• Suitable for pipe diameters in the range DN 15 to 2000 (½" to 80")

• Can be used with all metal and plastic pipes lined or unlined

• Ideal solution for applications with water, e.g. drinking water, industrial water, saltwater, deionized water, cooling water and heating water

• Perfectly suitable for – subsequent mounting – flow monitoring – improving measuring points

Features and benefits

The Prosonic Flow ultrasonic clamp-on system allows accurate and cost-effective flow measurement from outside the pipe and without the need to interrupt the process. The flow measurement is bidirectional and causes no pressure loss.

• Easy, safe and menu-guided sensor mounting ensures precise measuring results

• Long-term system integrity thanks to robust sensor and industrial mounting kit design

• Automatic frequency scan for optimized installation and maximum measuring performance

• IP 68 for pipes under water

• Remote configuration using Endress+Hauser's FieldCare software

TI00105D/06/EN/13.11 71136725

Proline Prosonic Flow 91W

Function and system design. . . . . . . . . . . . . . . . . . . . . 3

Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Sensor selection and arrangement . . . . . . . . . . . . . . . . . . . . . . . . . 5

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operable flow range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Low flow cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Measuring unit electrical connection . . . . . . . . . . . . . . . . . . . . . . . 7

Connecting the connecting cable . . . . . . . . . . . . . . . . . . . . . . . . . 8

Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cable-specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Power supply failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Potential equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Language group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 19

CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

C-Tick mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Other standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . 19

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Device-specific accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Communication-specific accessories . . . . . . . . . . . . . . . . . . . . . . 21

Service-specific accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . . 23

Performance characteristics. . . . . . . . . . . . . . . . . . . . 10

Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating conditions: installation . . . . . . . . . . . . . . . 11

Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Inlet and outlet runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Connection cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operating conditions: environment . . . . . . . . . . . . . . 12

Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Shock and vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operating conditions: process . . . . . . . . . . . . . . . . . . 13

Medium temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Medium pressure range (nominal pressure) . . . . . . . . . . . . . . . . . 13

Pressure loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Energy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 14

Design, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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Function and system design

Measuring principle The measuring system operates on the principle of transit time difference. In this measurement method,

acoustic (ultrasonic) signals are transmitted between two sensors. The signals are sent in both directions, i.e. the sensor in question works as both a sound transmitter and a sound receiver.

As the propagation velocity of the waves is less when the waves travel against the direction of flow than along the direction of flow, a transit time difference occurs. This transit time difference is directly proportional to the flow velocity.

A0013117

Principle of the transit time difference measurement method

Q = v · A

aSensor bSensor Q Volume flow v Flow velocity (v & t ) t Transit time difference (t = t A Pipe cross-sectional area

– tb)

The measuring system calculates the volume flow of the fluid from the measured transit time difference and the pipe cross-sectional area. In addition to measuring the transit time difference, the system simultaneously measures the sound velocity of the fluid. This additional measured variable can be used to distinguish different fluids or as a measure of product quality.

The measuring device can be configured onsite to suit the specific application using Quick Setup menus.

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Proline Prosonic Flow 91W

Esc

Measuring The measuring system consists of one transmitter and two sensors. Different versions are available depending

on the specific requirements.

The transmitter is used both to control the sensors and to prepare, process and evaluate the measuring signals, and to convert the signals to a desired output variable.

The sensors work as sound transmitters and sound receivers. Depending on the application and version, the sensors can be arranged for measurement via one or two traverses  ä 5.

Transmitter

Prosonic Flow 91 W Field Housing

A0006022

Prosonic Flow W Prosonic Flow W

DN 15 to 65 (½" to 2½")

A0011484

DN 50 to 4000 (2" to 160")

A0013475

Mounting accessories

The requisite mounting distances must be determined for the sensors. Information on the fluid, the pipe material used and the exact pipe dimensions is needed to determine these values. The values for the sound velocity of the following fluids, pipe materials and lining materials are stored in the transmitter:

Fluid Pipe material Lining

•Water

•Sea water

• Distilled water

• Ammonia

• Alcohol

•Benzene

•Bromide

•Ethanol

•Glycol

•Kerosene

• Milk

• Methanol

• Toluene

•Lube oil

•Fuel Oil

•Petrol

• Carbon steel

• Ductile Iron

• Stainless steel

• Alloy C

•PVC

•PE

•LDPE

•HDPE

•PVDF

•PA

•PP

•PTFE

• Glass pyrex

•Mortar

• Rubber

• Tar Epoxy

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Proline Prosonic Flow 91W

Sensor selection and arrangement

The sensors can be arranged in two ways:

• Mounting arrangement for measurement via one traverse: the sensors are located on opposite sides of the pipe.

• Mounting arrangement for measurement via two traverses: the sensors are located on the same side of the pipe.

A0005728

Sensor mounting arrangement (top view)

1 Mounting arrangement for measurement via one traverse 2 Mounting arrangement for measurement via two traverses

Recommendations

The number of traverses required depends on the sensor type, the nominal diameter and the thickness of the pipe wall. We recommend the following types of mounting:

Sensor Type Nominal Diameter Sensor Frequency Sensor ID Type of Mounting

DN 15 to 65 (½" to 2 ½") 6 MHz W-CL-6F 2 traverses

DN 80 (3") 2 MHz W-CL-2F 2 traverses

Prosonic Flow W

DN 100 to 300 (4" to 12") 2 MHz (or 1 MHz)

DN 300 to 600 (12" to 24") 1 MHz (or 2 MHz)

DN 650 to 2000 (26" to 80") 1 MHz (or 0.5 MHz)

The installation of clamp-on sensors is principally recommended in the 2 traverse type installation. This type of

W-CL-2F W-CL-1F

W-CL-1F W-CL-2F

W-CL-1F W-CL-05F

2 traverses

1 traverse

installation allows the easiest and most comfortable type of mounting. However, in certain applications a 1 traverse installation may be preferred:

• Certain plastic pipes with wall thickness > 4 mm (0.16 in)

• Lined pipes

• Applications with fluids with high acoustic damping

0.5 MHz sensors are also recommended for applications with composite material pipes such as GRP and may be recommended for certain lined pipes, pipes with wall thickness >10 mm (0.4 in), or applications with media with high acoustic damping. In addition, for these applications we principally recommend mounting the W sensors in a 1 traverse configuration.

6 MHz sensors are recommended for applications where flow velocity is< 10 m/s (32.8 Hz/s)

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Input

Measured variable Flow velocity (differential delay proportional to flow velocity)

Measuring range Typically v = 0 to 15 m/s (0 to 50 ft/s) at the specified measuring accuracy

Operable flow range Over 150 : 1

Output

Output signal Current output:

• Galvanically isolated

• Full scale value adjustable

• Temperature coefficient: typ. 2 μA/°C, resolution: 1.5 μA

• Active: 4 to 20 mA, R

Pulse/status output:

• Galvanically isolated

• Open collector

• 30 V DC / 250 mA

• Passive

• Can be configured as: – Pulse output: pulse value and pulse polarity can be selected, max. pulse width adjustable (5 to 2000 ms),

pulse frequency max. 100 Hz

– Status output: for example, can be configured for error messages, empty pipe detection, flow recognition,

limit value

< 700 (for HART: RL  250 )

Proline Prosonic Flow 91W

Signal on alarm • Current output  failsafe mode selectable.

• Pulse/frequency output  failsafe mode selectable

Load See “Output signal”

Low flow cutoff Switching point for the low flow freely selectable.

Galvanic isolation All circuits for inputs, outputs, and power supply are galvanically isolated from each other.

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Proline Prosonic Flow 91W

2127

–

25–26

(L+)

(L-)

Measuring unit electrical connection

Power supply

Connecting the transmitter (Aluminium-Fieldhousing). cable cross-section: max. 2.5 mm

aCover b Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC c Terminal for power supply: d Terminal for power supply: Nr. 1–2 (terminal assignment) e Signal cable f Ground terminal für signal cable g Terminal connector for signal cable: Nr. 24–27 (terminal assignment) h Service connector i Ground terminal for potential matching



(AWG 13)

a0005838

Terminal assignment Prosonic Flow 91W

Order variant Terminal No. (inputs/outputs)

24 (+)/25 (–) 26 (+)/27 (–) 1 (L1/L+) /2 (N/L–)

Fixed communication boards (fixed assignment)

91***-***********A Pulse output HART current output Power supply

Functional values see "Output signal" see "supply voltage"

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Proline Prosonic Flow 91W

Connecting the connecting

Connection sensor cable in the electronics compartment

cable

a, b Sensor connection cable c Cable gland holder d Cable gland

Supply voltage Transmitter

85 to 260 V AC, 45 to 65 Hz 20 to 55 V AC, 45 to 65 Hz 16 to 62 V DC

Sensor

A0015907

Cable entry Power supply and signal cables (inputs/outputs)

• Cable entry M20 × 1.5 (8 to 12 mm; 0.31 to 0.47 in)

• Cable gland for cables, 6 to 12 mm ( 0.24" to 0.47")

• Thread for cable entries ½" NPT, G ½"

Connection cable (sensor /transmitter)

Cable glands for one multicore connection cable (1 × 

• Cable gland M20 × 1.5

• Thread for cable entries ½" NPT, G ½"

Connection cable (sensor /transmitter)

Cable glands for two single core connection cable (2 × 

• Cable gland M20 × 1.5

• Thread for cable entries ½" NPT, G ½"

The Prosonic Flow W DN 15 to 65 (½ to 2½") is grounded via the cable gland.

 8 mm) per cable entry

 4 mm) per cable entry

Cable gland for one multicore connection cable (1 ×8 mm /0.31 in) per cable entry

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Endress+Hauser Prosonic 91W Specifications

Technical Information

Proline Prosonic Flow 91W

Table of contents

Function and system design

Measuring principle The measuring system operates on the principle of transit time difference. In this measurement method,

Measuring The measuring system consists of one transmitter and two sensors. Different versions are available depending

Transmitter

Mounting accessories

Sensor selection and arrangement

Input

Measured variable Flow velocity (differential delay proportional to flow velocity)

Measuring range Typically v = 0 to 15 m/s (0 to 50 ft/s) at the specified measuring accuracy

Operable flow range Over 150 : 1

Output

Output signal Current output:

Signal on alarm • Current output  failsafe mode selectable.

Load See “Output signal”

Low flow cutoff Switching point for the low flow freely selectable.

Galvanic isolation All circuits for inputs, outputs, and power supply are galvanically isolated from each other.

Measuring unit electrical connection

Power supply

Supply voltage Transmitter

Cable entry Power supply and signal cables (inputs/outputs)