Endress+Hauser Proline Prosonic Flow90U Manual

TI057D/06/en/04.06
71026244
Technical Information
Proline Prosonic Flow
90U, 90W, 91W, 93C, 93U, 93W
Ultrasonic Flow Measuring System
Flowrate measurement for standard applications
with drinking water, wastewater and process water
Application
The sensors are perfectly suited for bidirectional
measurement of pure or slightly contaminated liquids,
regardless of the pressure, temperature, conductivity
and viscosity.
• Applicable for all homogeneous fluids in acoustically
transmissive pipes, even with lining
• For water/wastewater applications
• Ideal for retrofitting
• Installation without process interruption
Approvals for hazardous area:
• ATEX, FM, CSA
Approvals in the food industry/hygiene sector:
• Drinking water approval for Prosonic Flow C
Connection to process control system:
• HART, PROFIBUS PA, FOUNDATION Fieldbus
Your benefits
Prosonic Flow, the flexible and cost-effective flow
measuring system, available as a clamp-on, insertion or
inline unit, offers you a tailor-made solution.
The Proline transmitter concept comprises:
• Modular device and operating concept resulting in a
higher degree of efficiency
• Diagnostic ability and data back-up for increased
process quality
The tried-and-tested Prosonic Flow sensors offer:
• Easy and safe installation and commissioning
guarantee precise measurement
• Insensitivity to vibrations
• No pressure loss
• Optionally available as dual-path version for short
inlet runs
• Prosonic Flow C with guaranteed and attestable
accuracy

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
2 Endress + Hauser
Table of contents
Function and system design. . . . . . . . . . . . . . . . . . . . . 3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System design Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . 3
System design Clamp-on sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System design Insertion sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 8
System design Inline sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operable flow range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Input signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Switching output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Low flow cut off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electrical connection measuring unit for
Prosonic Flow 90/93 (standard version) . . . . . . . . . . . . . . . . . . . 15
Electrical connection measuring unit Prosonic Flow 91
(standard version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electrical connection measuring unit for Prosonic Flow 90
(PROFIBUS PA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical connection measuring unit for Prosonic Flow 93
(PROFIBUS PA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Electrical connection measuring unit for Prosonic Flow 93
(FOUNDATION Fieldbus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical connection sensor connecting cable
Prosonic Flow 90/93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electrical connection sensor connecting cable
Prosonic Flow 91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Supply voltage (power supply) . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Cable specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power supply failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Potential equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Performance characteristics. . . . . . . . . . . . . . . . . . . . 24
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operating conditions: Installation . . . . . . . . . . . . . . . 26
Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Inlet and outlet run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Length of connecting cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Operating conditions: Environment. . . . . . . . . . . . . . 31
Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Shock and vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 31
Operating conditions: Process . . . . . . . . . . . . . . . . . . 32
Medium temperature range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Medium pressure range (nominal pressure) . . . . . . . . . . . . . . . . 32
Pressure loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 33
Design, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Language group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 42
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
C-Tick mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
PROFIBUS PA certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
FOUNDATION Fieldbus certification . . . . . . . . . . . . . . . . . . . . . 42
Other standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 42
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . . 43

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
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Function and system design
Measuring principle Prosonic Flow operates on the principle of transit time difference.
An acoustic (ultrasonic) signal is sent in both directions from one measuring sensor to another.
A transit time difference arises because the signal propagation velocity of the sound waves is greater in the
direction of flow than against the direction of flow. This difference is directly proportional to the flow velocity.
Prosonic Flow calculates the flow from the pipe cross-sectional area and the measured transit time difference.
A0005961
v ~ ∆t
Q = v · A
v = Flow velocity
∆t = Transit time difference
v = Volume flow
A = Pipe cross-sectional area
In addition to the volume flow, the system also always measures the sound velocity of the fluid. The sound
velocity can be used to distinguish different fluids or as a measure of fluid quality. Application-specific
configuration of the Prosonic Flow can be carried out locally with the aid of the “Quick Setup” menu.
System design
Measuring system
The Prosonic Flow ultrasonic flow measuring system always consists of a transmitter and the related measuring
sensors. All components are available in different versions depending on the application requirements.
The transmitter is used to actuate the measuring sensors. The electronics and the software in the transmitter
are used to prepare, process and evaluate the sensor signals and to convert the measuring signal to the desired
output variables.
The measuring sensors work bidirectionally as sound transmitters and sound receivers. The electrical signals of
the transmitter are converted to a pressure signal in the measuring sensors and vice versa.
Depending on the design, the different sensor versions of ultrasonic flow measuring devices offer unique
possibilities in the application. The properties and benefits of the different versions are explained in detail on
the following pages.

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
4Endress + Hauser
System design Clamp-on
sensors
Prosonic Flow W and U
F06-9xWCOxxx-21-05-06-xx-000
Design:
Prosonic Flow clamp-on sensors are mounted on the existing piping from outside.
Possibilities and applications:
• Ideal for retrofitting, installation possible without interrupting process.
• Easy, quick and low-cost mounting.
• Suitable for all acoustically transmissive pipes and all pure and slightly contaminated liquids.
• Very large nominal diameter range DN 15 to 4000.
Sensor arrangement
The transmitter offers a number of options between 1 and 2 traverses for the type of installation.
A0005728
11traverse
22traverses
Recommendations:
Due to their design and properties, the Prosonic Flow sensors are particularly suited to certain nominal
diameter ranges and pipe wall thicknesses. For this reason, various sensor types are offered for Prosonic Flow W
and U for these different applications.
Recommendations for sensor installation can be found in the following table.
Note!
• Please note that the signal strength is reduced with each additional reflection point in the pipe.
(Example: 2 traverses = 1 reflection point).
• The installation of clamp-on sensors is principally recommended in the 2 traverse type of installation. This
type of installation allows the easiest and most comfortable type of mounting and means that a system can
also be mounted even if the pipe can only be accessed from one side.
12
Sensor type Nominal diameter Type of mounting
Prosonic Flow U DN 15 to 100 2 traverses
Prosonic Flow W DN 50 to 60
DN 80 to 600
DN 650 to 4000
2 (or 1) traverses
2 traverses
1 traverse

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 5
• If the pipe nominal diameter is small (DN 60 and smaller), the sensor spacing with Prosonic Flow W can be
too small for an installation with 2 traverses. In this case, the 1 traverse type of installation must be used.
In all other instances, the 2 traverse configuration is the preferred method.
• The use of Prosonic Flow W sensors DN 100 to 4000 is principally recommended for plastic pipes with a
wall thickness > 10 mm, pipes made of composites such as GRP, pipes with lining, even for nominal
diameters < DN 100. This applies also to applications with media with high acoustic damping. For these
applications, we principally recommend mounting the W sensors with 1 traverse configuration.
• In the DN 15 to 50 nominal diameter range, Prosonic Flow U is preferred for use on plastic pipes. Both the
Prosonic Flow W and the Prosonic Flow U sensor types can be used in the DN 50 to 100 nominal diameter
range. The use of Prosonic Flow W sensors is principally recommended for applications as of DN 60.
• If the measuring device displays an insufficient signal strength, reduce the number of the traverses.
Dual-channel measuring devices
Prosonic Flow 93 has two measuring channels which are independent of one another. In other words, the
transmitter supports the simultaneous operation of two sensor pairs at two individual measuring channels. In
doing so, the resources of the transmitter are split evenly between the two channels.
This ability of the transmitter can be used in many different ways:
• For dual-channel measurement
• For dual-path measurement
The transmitter can output the measured values of both channels either individually or arithmetically linked
(as total, difference or mean).
Dual-channel measurement
In the case of dual-channel measurement, the measured values of two independent measuring points are
determined and processed by one transmitter.
A0001159
a Cable for power supply
b Signal cable (outputs)
If required, the measured values of measuring channel 1 and measuring channel 2 can be arithmetically linked
together. The following possibilities for outputting measured values are suitable for dual-channel measurement:
• Individual output of measured values from channel 1 and 2
• Total of measured values from channel 1 and 2
• Difference of measured values from channel 1 and 2
a
b

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
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The measuring device supports the individual configuration of the measuring channels and the independent
setting of the display and outputs. As a result, the sensor type and type of installation, for example, can be
selected and configured separately for both channels.
Note!
Pay particular attention to the recommendations on installation in the “Mounting location” section, Page 26,
the “Orientation” section, Page 27, the “Inlet and outlet run” section, Page 30 and the recommendations on
the type of installation in the “Sensor arrangement” section, Page 4.
Dual-path measurement
In dual-path measurement, the transmitter is used to operate two sensor pairs which are installed on the same
pipe. Different applications can necessitate different types of installation.
A0001160
a Cable for power supply
b Signal cable (outputs)
Note!
Observe the recommendations in the “Sensor arrangement” section, Page 4.
The following possibilities for outputting measured values are suitable for dual-path measurement:
• Individual output of measured values from channel 1 and 2
• Arithmetic mean of the measured values from channel 1 and 2 (CH1 + CH2 / 2)
The possibility of obtaining the mean value in dual-path measurement provides the advantage of a more stable
measured value. A measured value that is generated from two independent measuring signals is generally less
sensitive to irregularities and faults in the application.
As a result, if conditions are not ideal, for example, the dual-path system means that the different flow
components within the flow can be better determined thanks to the fact that the measured values are
determined independently on two levels. Differences are then balanced out when the two measured values are
aa
bb
AB

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 7
subsequently averaged to form one process variable. This often results in a more stable and more accurate
measured value than would be the case with single-path measurement.
The measuring device supports the individual configuration of the measuring channels.
Caution!
Pay particular attention to the recommendations on installation in the “Mounting location” section, Page 26,
the “Orientation” section, Page 27, the “Inlet and outlet run” section, Page 30 and the recommendations on
the type of installation in the “Sensor arrangement” section, Page 4.
Accessories for commissioning
If mounting and commissioning a clamp-on measuring point, you require information on the liquid to be
measured and the pipe material used, as well as the exact pipe dimensions. The data of the most common
liquids and pipe and lining materials are pre-programmed into the program of the Prosonic Flow 90 and 93
transmitters.
For liquids:
WATER – SEA WATER – DISTILLED WATER – AMMONIA – ALCOHOL – BENZENE – BROMIDE –
ETHANOL – GLYCOL – KEROSENE – MILK – METHANOL – TOLUOL – LUBRICATING OIL – FUEL OIL –
PETROL
For pipe material:
STAINLESS STEEL – SS ANSI 304 – SS ANSI 316 – SS ANSI 347 – SS ANSI 410 – SS ANSI 430 –
ALLOY C – PVC – PE – LDPE – HDPE – GRP – PVDF – PA – PP – PTFE – GLASS PYREX – ASBESTOS
CEMENT – CARBON STEEL – DUCTILE IRON
Lining:
CEMENT – RUBBER – TAR EPOXY
Additional accessories
If your liquid or pipe material is not included in the pre-programmed options, and if these data are not known,
they can be determined with the aid of the sound velocity measuring sensors DDU 18 and the wall thickness
measuring sensor DDU 19. These are only available for Prosonic Flow 93 transmitters.
DDU 18
Sound velocity measuring sensors
F06-9xDDU18x-21-05-06-xx-001
• Sound velocity measuring sensors for Prosonic Flow 93
• Sensor pair for measuring the sound velocity of the fluid.
Only required for commissioning the clamp-on version unless the
sound velocity in the fluid is known.
• DN 50 to 3000 (2" to 120")
• Temperature range –40 to +80 °C
• Degree of protection IP 68
•Sensor holder made of stainless steel
DDU 19
Wall thickness measuring sensors
F06-9xDDU19x-21-05-06-xx-001
• Wall thickness measuring sensor for Prosonic Flow 93
• Sensor for measuring the pipe wall thickness. Only required for
commissioning the clamp-on version.
• Wall thickness measuring range:
2 to 50 mm for steel pipes
4 to 15 mm for plastic pipes (suited to a certain extent for use on
PTFE or PE pipes)
• Temperature range 0 to +60 °C
• Degree of protection IP 67
• Sensor holder made of stainless steel

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
8Endress + Hauser
System design
Insertion sensors
Prosonic Flow W Insertion
F06-9xWINxxx-21-05-06-xx-000
Design:
Prosonic Flow W Insertion sensors are mounted on the existing piping with the aid of welding sockets. One or
two measuring paths can be implemented in the pipe.
Possibilities and applications:
• Can be used for applications with water and wastewater
• Simple mounting, specially suited for retrofitting on all weldable pipes with or without lining.
• Dual-path measurement with 2 sensor pairs makes it possible to reduce the necessary inlet runs.
Sensor arrangement
The Prosonic Flow W Insertion sensors are mounted on the existing piping with the aid of welding sockets. For
this, boreholes are required in the pipe into which the supports for the flowrate measuring sensors are welded.
In a second step, the flowrate measuring sensors are screwed into the sensor supports.
Prosonic Flow W Insertion is available as a single-path or dual-path version (only for Prosonic Flow 93
transmitters). Two sensor pairs are mounted in the pipe in the dual-path version. The dual-path version is
available for pipes in the nominal diameter range DN 400 to 4000. It offers the following advantages over the
single-path version:
• Short inlet run of only 10 x nominal diameter.
• Increased tolerance towards turbulence (swirl).
• Improved linearity of measurement.
Please refer also to the “Installation” and “Technical data” sections.
Single-path measurement DN 200 to 4000 Dual-path measurement DN 400 to 4000
F06-9xWIxxxx-16-05-xx-xx-001 F06-9xWIxxxx-16-05-xx-xx-000

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
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System design
Inline sensors
Prosonic Flow C Inline
F06-9xCxxxxx-21-05-06-xx-000
Design:
The Prosonic Flow C Inline sensor consists of a measuring pipe which is integrated into the pipe system of the
application by means of process flanges.
Prosonic Flow C is a dual-path system and has two pairs of W insertion sensors.
Possibilities and applications:
• High accuracy
• Traceably calibrated
• Suitable for applications with water and wastewater.
The measuring pipe is not an active part of the measuring system and is therefore not required for the measuring
function. However, in contrast to the clamp-on and Insertion systems, which are installed on site, it allows the
calibration to be transferred from the factory to the place of use. This has the advantage that a 93 C Inline
measuring system measures with guaranteed and verifiable accuracy. Prosonic Flow C Inline makes it possible
to achieve high accuracy of the ultrasonic flow measuring system and also offers traceable calibration.
The C Inline sensor is available specific to the application in two versions with different linings:
• For drinking water: epoxy coating with approval for drinking water
• For wastewater: epoxy coating for wastewater
The Prosonic Flow 93 C Inline measuring system always consists of a combination of a Prosonic Flow 93
transmitter in a wall-mount housing and an optimized version of the Prosonic Flow W Insertion sensors
integrated in the measuring pipe. Prosonic Flow 93 C Inline is only available as a remote version with 2 sensor
pairs. This dual-path version offers the following advantages over the single-path version:a
• Short inlet run of only 10 x DN.
• Increased tolerance towards turbulence (swirl).
• Improved linearity of measurement.
Please refer also to the “Installation” and “Technical data” sections.

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
10 Endress + Hauser
Measuring system The measuring system consists of the following transmitters and measuring sensors.
Transmitter
Prosonic Flow 91
A0006022
• For mounting in non-hazardous areas.
• Two-line LCD display
• Configuration with keys
• Sensor setup
• All outputs are galvanically isolated from the power supply, measuring circuit
and each other.
• Volume measurement
• Designed for single-channel measurement as standard
• Degree of protection IP 67
Prosonic Flow 90
F06-x0xxxxxx-21-03-06-xx-002
• For mounting in non-hazardous areas.
• Two-line LCD display
• Configuration with keys
•QuickSetup
• All outputs are galvanically isolated from the power supply, measuring circuit
and each other.
• Volume and sound velocity measurement
• Designed for single-channel measurement as standard
• Degree of protection IP 67
Prosonic Flow 93
F06-x3xxxxxx-21-03-06-xx-002
• For mounting in non-hazardous areas and in Ex Zone II.
• Four-line LCD display
• Configuration with Touch Control
• Application-specific Quick Setup
• All outputs are galvanically isolated from the power supply, measuring circuit
and each other.
• Volume and sound velocity measurement
• Designed for wall thickness measurement as standard.
• Designed for dual-channel measurement at one or two different measuring
points as standard.
• Degree of protection IP 67
Esc

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
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Measuring sensors
Prosonic Flow U
“Clamp-on” version
F06-9xUxxxxx-21-05-06-xx-001
• Clamp-on flowrate measuring sensors for small pipe nominal diameters
• Sensor pair for measuring the flow and the sound velocity of the fluid during
operation.
• 1 sensor type for DN 15 to 100 (1/2" to 4")
• Temperature range –20 to +80 °C
• Degree of protection IP 54
• Sensor unit made of plastic, stainless cast steel and aluminum
Prosonic Flow W
“Clamp-on” version
F06-9xWCOxxx-21-05-06-xx-000
• Clamp-on flowrate measuring sensors
• Sensor pair for measuring the flow and the sound velocity of the fluid during
operation.
• 2 sensor types for DN 50 to 4000 (2" to 156")
• Temperature range –20 to +80 °C (optional 0 to +130 °C)
• Degree of protection IP 67, IP 68 optional
• Sensor holder made of stainless steel
Prosonic Flow W
“Insertion” version
F06-9xWINxxx-21-05-06-xx-000
• Insertion flowrate measuring sensors
• Sensor pair for measuring the flow and the sound velocity of the fluid during
operation.
• DN 200 to 4000
• Temperature range –40 to +80 °C
• 2 sensor holder types
single-channel (DN 200 to 4000) or dual-channel (DN 400 to 4000)
• Degree of protection IP 68
• Sensor holder made of stainless steel
Prosonic Flow C Inline
A0001149
• Calibrated measuring pipe with flowrate measuring sensors
• 2 sensor pairs for measuring the flow and the sound velocity of the fluid
during operation.
• 1 sensor type for DN 300 to 2000
• Measuring pipe for nominal diameter range DN 300 to 2000
• Temperature range –10 to +60 °C
• Degree of protection IP 68
• Measuring pipe in ST 37.2 epoxy coated
• Measuring sensors made of stainless steel

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
12 Endress + Hauser
System overview
Ranges of application:
Warm and cold water and similar liquids
Input
Measured variable Flow velocity (transit time difference proportional to flow velocity)
Measuring range Typically v = 0 to 15 m/s with the specified measuring accuracy for Prosonic Flow W
Typically v = 0 to 10 m/s with the specified measuring accuracy for Prosonic Flow U and C
Operable flow range Over 150 : 1
Input signal Prosonic Flow 90/93
Status input (auxiliary input):
U = 3 to 30 V DC, Ri= 5 kΩ, galvanically isolated.
Configurable for: totalizer(s) reset, positive zero return, error message reset.
Prosonic Flow 91
None
Output
Output signal Prosonic Flow 90
Current output:
Active/passive selectable, galvanically isolated, time constant selectable (0.05 to 100 s), full scale value
adjustable, temperature coefficient: typ. 0.005% o.r./°C; resolution: 0.5 µA.
• Active: 0/4 to 20 mA, RL<700 Ω(for HART: RL≥250 Ω)
• Passive: 4 to 20 mA, supply voltage 18 to 30 V DC, RL< 700 Ω
Pulse/frequency output:
Passive, open collector, 30 V DC, 250 mA, galvanically isolated.
•Frequency output: full scale frequency 2 to 1000 Hz (fmax = 1250 Hz), on/off ratio 1:1,
pulse width max. 10 s
•Pulse output: pulse value and pulse polarity selectable, max. pulse width adjustable (0.5 to 2000 ms),
max. pulse frequency selectable
Possible combinations of transmitters and sensors
Prosonic Flow 90
Transmitter
Prosonic Flow 91
Transmitter
Prosonic Flow 93
Transmitter
Prosonic Flow W
Clamp-on version
✔✔✔
Prosonic Flow U
Clamp-on version
✔–✔
Prosonic Flow W
Insertion version
✔–✔
Prosonic Flow C Inline
Calibrated measuring pipe
with Prosonic Flow W
sensors
––✔

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 13
PROFIBUS PA interface:
• PROFIBUS PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated
• Current consumption: 11 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
• Data transmission rate, supported baudrate: 31.25 kBit/s
• Signal encoding: Manchester II
• Function blocks: 3 x Analog Input (AI), 1 x Totalizer
• Output data: volume flow, sound velocity, flow velocity
• Input data: positive zero return (ON/OFF), operation control, totalizer control, zero point adjustment
control, display value
• Bus address can be set via DIP switch on device
Prosonic Flow 91
Current output:
• Galvanically isolated
• Active: 4 to 20 mA, RL<700 Ω(for HART: RL≥250 Ω)
• Full scale value adjustable
• Temperature coefficient: typ. 2 µA/°C, resolution: 1.5 µA
Pulse/status output:
• Galvanically isolated
• Passive: 30 V DC/250 mA
• Open collector
• Optionally configurable as:
– Pulse output: pulse value and pulse polarity selectable, max. pulse width adjustable (5 to 2000 ms),
max. pulse frequency 100 Hz
– Status output: configurable e.g. for error messages, empty pipe detection, flow direction detection,
limit value
Prosonic Flow 93
Current output:
Active/passive selectable, galvanically isolated, time constant selectable (0.05 to 100 s), full scale value
adjustable, temperature coefficient: typ. 0.005% o.r./°C; resolution: 0.5 µA
• Active: 0/4 to 20 mA, RL< 700 Ω(for HART: RL≥250 Ω)
• Passive: 4 to 20 mA, max. 30 V DC, Ri≤150 Ω
Pulse/frequency output:
Active/passive selectable, galvanically isolated
• Active: 24 V DC, 25 mA (max. 250 mA during 20 ms), RL> 100 Ω
• Passive: open collector, 30 V DC, 250 mA
•Frequency output: full scale frequency 2 to 10000 Hz (fmax = 12500 Hz), 2 to 5000 Hz for EEx ia,
on/off ratio 1:1, pulse width max. 10 s
•Pulse output: pulse value and pulse polarity selectable, max. pulse width adjustable (0.05 to 2000 ms), the
on/off ratio is 1:1 as of a frequency of 1 / (2 x pulse width)
Note!
The following values of the communication interfaces only apply to Prosonic Flow W (clamp-on and
Insertion) and to Prosonic Flow U (clamp-on)!
PROFIBUS PA interface for Prosonic Flow W and U:
• PROFIBUS PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated
• Data transmission rate, supported baudrate: 31.25 kBit/s
• Current consumption: 11 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
• Signal encoding: Manchester II
• Function blocks: 8 x Analog Input (AI), 3 x Totalizer
• Output data: volume flow channel 1 or channel 2, sound velocity channel 1 or channel 2, flow velocity
channel 1 or channel 2, average volume flow, average sound velocity, average flow velocity, volume flow
sum, volume flow difference, totalizer 1 to 3
• Input data: positive zero return (ON/OFF), operation control, totalizer control, zero point adjustment
control, display value
• Bus address can be set via DIP switch on device

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
14 Endress + Hauser
FOUNDATION Fieldbus interface for Prosonic Flow W and U:
• FOUNDATION Fieldbus H1, IEC 61158-2, galvanically isolated
• Data transmission rate, supported baudrate: 31.25 kBit/s
• Current consumption: 12 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
• Signal encoding: Manchester II
• Function blocks: 8 x Analog Input (AI), 1 x Discrete Output, 1 x PID
• Output data: volume flow channel 1 or channel 2, sound velocity channel 1 or channel 2, flow velocity
channel 1 or channel 2, signal strength channel 1 or 2, average volume flow, average sound velocity,
average flow velocity, volume flow sum, volume flow difference, totalizer 1 to 3
• Input data: positive zero return (ON/OFF), reset totalizer, zero point adjustment control
• Link Master function (LAS) is supported
Note!
The following values of the communication interfaces only apply to Prosonic Flow C Inline!
PROFIBUS PA interface for Prosonic Flow C:
• PROFIBUS PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated
• Data transmission rate, supported baudrate: 31.25 kBit/s
• Current consumption: 11 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
• Signal encoding: Manchester II
• Function blocks: 8 x Analog Input (AI), 3 x Totalizer
• Output data: average volume flow, average sound velocity, average flow velocity
• Input data: positive zero return (ON/OFF), operation control, totalizer control, zero point adjustment
control, display value
• Bus address can be set via DIP switch on device
FOUNDATION Fieldbus interface for Prosonic Flow C:
• FOUNDATION Fieldbus H1, IEC 61158-2, galvanically isolated
• Data transmission rate, supported baudrate: 31.25 kBit/s
• Current consumption: 12 mA
• Error current FDE (Fault Disconnection Electronic): 0 mA
• Signal encoding: Manchester II
• Function blocks: 8 x Analog Input (AI), 1 x Discrete Output, 1 x PID
• Output data: average volume flow, average sound velocity, average flow velocity, totalizer 1 to 3
• Input data: positive zero return (ON/OFF), reset totalizer, zero point adjustment control
• Link Master function (LAS) is supported
Signal on alarm • Current output →failsafe mode selectable
• Pulse/frequency output →failsafe mode selectable
• Status output (Prosonic Flow 90/91) → “nonconductive” in event of error or power supply failure
• Relay output (Prosonic Flow 93) → “voltage-free” in event of error or power supply failure
Load See “output signal”
Switching output Status output (Prosonic Flow 90/91):
Open collector, max. 30 V DC / 250 mA, galvanically isolated.
Configurable for: error messages, flow direction, limit values.
Relay output (Prosonic Flow 93):
Normally closed (NC) or normally open (NO) contacts available (factory setting: relay 1 = NO contact,
relay 2 = NC contact), max. 30 V / 0.5 A AC; 60 V / 0.1 A DC, galvanically isolated.
Configurable for: error messages, flow direction, limit values.
Low flow cut off Switching point for the creepage freely selectable
Galvanic isolation All circuits for inputs, outputs and power supply are galvanically isolated from each other.

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 15
Power supply
Electrical connection
measuring unit for
Prosonic Flow 90/93
(standard version)
Connecting power supply and signal cables in the connection compartment
A0001135
Connecting the transmitter (wall-mount housing). Cable cross-section: max. 2.5 mm2
a Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC; power consumption: 18 VA / 10 W
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L- for DC
bTerminalsNo. 20-27: signal cable
c Ground terminal for protective earth
d Ground terminal for signal cable shield
e Service connector
f Bolts on connection compartment housing
12
cd
e
a
ab b
f
+
22
–
23
+
20
–
21
+
24
–
25
+
26
–
27
L1 (L+)
N (L-)

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
16 Endress + Hauser
Terminal assignment Prosonic Flow 90
Terminal assignment Prosonic Flow 93
Depending on the version ordered, the inputs/outputs on the communication board can be either permanently
assigned (fixed) or variable (flexible) (see Table). Plug-in point modules which are faulty or need to be replaced
can be ordered as accessories.
Order version Terminal No. (inputs/outputs)
20 (+) / 21 (–) 22 (+) / 23 (–) 24 (+) / 25 (–) 26 (+) / 27 (–)
90***-***********W – – – HART current
output
90***-***********A – – Frequency output HART current
output
90***-***********D Status input Status input Frequency output HART current
output
90***-***********H – – – PROFIBUS PA
Order version Terminal No. (inputs/outputs)
20 (+) / 21 (–) 22 (+) / 23 (–) 24 (+) / 25 (–) 26 (+) / 27 (–)
Fixed communication boards (fixed assignment)
93***-***********A – – Frequency output HART current
output
93***-***********B Relay output Relay output Frequency output HART current
output
93***-***********H – – – PROFIBUS PA
93***-***********K – – – FOUNDATION
Fieldbus
Flexible communication boards
93***-***********C Relay output Relay output Frequency output HART current
output
93***-***********4 Frequency output Frequency output Current output HART current
output
93***-***********D Status input Relay output Frequency output HART current
output
93***-***********6 Relay output Relay output Current output HART current
output
93***-***********L Status input Relay output Relay output HART current
output
93***-***********M Status input Frequency output Frequency output HART current
output
93***-***********W Relay output Current output Current output HART current
output
93***-***********2 Relay output Current output Frequency output HART current
output

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 17
Electrical connection
measuring unit
Prosonic Flow 91
(standard version)
A0005838
Connecting the transmitter (aluminum field housing), max. cable cross-section 2.5 mm2
a Electronics compartment cover
b Cable for power supply: 85 to 250 V AC, 11 to 40 V DC, 20 to 28 V AC
c Ground terminal for power supply cable
d Terminal connector for power supply: No. 1–2 (terminal assignment)
e Signal cable
f Ground terminal for signal cable
g Terminal connector for signal cable: No. 24–27 (terminal assignment)
h Service connector
i Ground terminal for potential matching
Terminal assignment Prosonic Flow 91
eb
2127
–
25
–
26
+
24
+L1
(L+)
N
(L-)
e
g
b
d
h
c
f
b
a
e
i
Order version Terminal No. (inputs/outputs)
24 (+) / 25 (–) 26 (+) / 27 (–) 1 (L1/L+) / 2 (N/L–)
91***-***********A Pulse output HART current output Power supply
Functional values See “output signal” see “Supply voltage”

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
18 Endress + Hauser
Electrical connection
measuring unit for
Prosonic Flow 90
(PROFIBUS PA)
Connecting power supply and bus cables in the connection compartment
A0001316
Connecting the transmitter (wall-mount housing), max. cable cross-section 2.5 mm2
a Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L−for DC
b PROFIBUS PA line:
Terminal No. 26: PA+
Terminal No. 27: PA-
c Ground terminal for protective earth
d Ground terminal for signal cable shield
e Service connector for connecting service interface FXA193 (Fieldcheck, ToF Tool - Fieldtool Package)
f Connection compartment cover
Terminal assignment Prosonic Flow 90 PROFIBUS PA
12
cd
e
a
ab b
22 2320 21 24 25 26 27
f
PA (+)
PA (–)
L1 (L+)
N (L–)
Order version Terminal No. (inputs/outputs)
26: PA+
27: PA–
90***-***********H PROFIBUS PA (non Ex)
Connection values PROFIBUS PA
PROFIBUS PA:
Power supply: 9 to 32 V DC
Current consumption: 11 mA

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser 19
Electrical connection
measuring unit for
Prosonic Flow 93
(PROFIBUS PA)
Connecting power supply and bus cables in the connection compartment
A0006061
Connecting the transmitter (wall-mount housing), max. cable cross-section 2.5 mm2
a Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L−for DC
b PROFIBUS PA line:
Terminal No. 26: PA+
Terminal No. 27: PA −
c Ground terminal for protective earth
d Ground terminal for signal cable shield
e Service connector for connecting service interface FXA193 (Fieldcheck, ToF Tool - Fieldtool Package)
f Connection compartment cover
g Cable for external termination:
Terminal No. 24: DGND
Terminal No. 25: +5V
Terminal assignment Prosonic Flow 93 PROFIBUS/PA
PA (–)
PA (+)
12
cd
e
a
ab bg
22 2320 21 24 25 26 27
f
(DGND)
(+5 V)
g
L1 (L+)
N (L–)
Order version Terminal No. (inputs/outputs)
26: PA+
27: PA–
93***-***********H PROFIBUS PA
Connection values PROFIBUS PA
PROFIBUS PA:
Power supply: 9 to 32 V DC
Current consumption: 11 mA

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
20 Endress + Hauser
Electrical connection
measuring unit for
Prosonic Flow 93
(FOUNDATION Fieldbus)
Connecting power supply and bus cables in the connection compartment
A0006030
Connecting the transmitter (wall-mount housing), max. cable cross-section 2.5 mm2
a Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L−for DC
b Fieldbus cable:
Terminal No. 26: FF+ (with integrated reverse polarity protection)
Terminal No. 27: FF– (with integrated reverse polarity protection)
c Ground terminal for protective earth
d Ground terminal for fieldbus cable shield
e Service connector for connecting service interface FXA193 (Fieldcheck, ToF Tool - Fieldtool Package)
f Connection compartment cover
Terminal assignment Prosonic Flow 93 FOUNDATION Fieldbus
12
cd
e
a
ab b
22 2320 21 24 25 26 27
f
L1 (L+)
N (L–)
FF+
FF–
Order version Terminal No. (inputs/outputs)
26: FF+
27: FF–
93***-***********K FOUNDATION Fieldbus
Connection values FOUNDATION Fieldbus
FOUNDATION Fieldbus:
Power supply: 9 to 32 V DC
Current consumption: 12 mA