Ultrasonic flow measuring system
Volume flow measurement for standard applications
with drinking water, wastewater 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 up to DN 15 to 4000
½ to 160")
(
• Can be used with all metal and plastic pipes lined or
unlined and with composite pipes
• Ideal solution for applications with water, e.g. drinking
water, industrial water, wastewater, saltwater,
deionized water, cooling water and heating water
• Interface for easy integration into all common
distributed control systems:
–HART
–PROFIBUS DP/PA
– FOUNDATION Fieldbus
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.
Measuring principleThe 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.
Principle of the transit time difference measurement method
Q = v · A
aSensor
bSensor
QVolume flow
vFlow velocity (v & Δt )
ΔtTransit time difference (Δt = t
APipe cross-sectional area
– tb)
a
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.
Measuring systemThe measuring system consists of one transmitter and two sensors.
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 transmitter is optionally equipped for two-channel operation → ä 6.
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.
A0005961
Endress+Hauser3
Transmitter
Prosonic Flow 93 wall-mount housing
For mounting in non-hazardous zone
Sensor
Proline Prosonic Flow 93W
A0009629
Prosonic Flow WProsonic Flow W
Clamp-on version
Insertion version
A0013475
A0009674
Prosonic Flow W
DN 15 to 65 (½ to 2½")
A0011484
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:
FluidPipe materialLining
•Water
•Sea water
• Distilled water
• Ammonia
• Alcohol
•Benzene
•Bromide
•Ethanol
•Glycol
•Kerosene
• Milk
• Methanol
• Toluene
•Lube oil
•Diesel
• Gasoline
• Carbon steel
• Ductile iron
• Stainless steel
• Alloy C
•PVC
•PE
•LDPE
•HDPE
•GRP
•PVDF
•PA
•PP
•PTFE
•Glass pyrex
• Asbestos cement
• Copper
•Mortar
• Rubber
• Tar Epoxy
If you are using fluids, pipe materials or lining materials other than those listed in the table, and you do not
have the corresponding sound velocities for these fluids/materials, you can use the DDU18 and DDU19
sensors to determine the values.
4Endress+Hauser
Proline Prosonic Flow 93W
BA
Sensor selection and
arrangement
DDU18
(sound velocity measurement)
Nominal diameter range: DN 50 to 3000 (2 to 120")
Wall thickness range:
• Steel pipes: 2 to 50 mm (0.08 to 2.0")
• Plastic pipes: 4 to 15 mm (0.16 to 0.60")
(only suitable for PTFE and PE pipes to a certain extent)
A0009784
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.
DDU19
(wall thickness measurement)
A0009673
Sensor mounting arrangement
AMounting arrangement for measurement via one traverse
BMounting arrangement for measurement via two traverses
A0001108
Endress+Hauser5
Proline Prosonic Flow 93W
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 TypeNominal DiameterSensor FrequencySensor IDType of Mounting
5)
Prosonic Flow W
DN 15 to 65 (½ to 2½")6 MHz W-CL-6F*2 traverses
DN 50 to 65 (2 to 2½")2 MHz W-CL-2F*2 (or 1) traverses
DN 80 (3")2 MHzW-CL-2F*2 traverses
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 4000 (26 to 160")1 MHz (or 0.5 MHz)
1)
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
2 traverses
1 traverse
3)
3)
3)
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. However, in certain applications a 1 traverse installation may be
preferred. These include:
• Certain plastic pipes with wall thickness > 4 mm (0.16")
• Pipes made of composite materials such as GRP
• Lined pipes
• Applications with fluids with high acoustic damping
2)
If the pipe nominal diameter is small (DN 65 / 2½" and smaller), the sensor spacing with Prosonic Flow W can be too
small for two traverse installation. In this case, the 1 traverse type of installation must be used.
3)
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"), 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.
4)
Insertion W sensors are mounted in a 1 traverse configuration → ä 23.
5)
6 MHz sensors for appliations where flow velocity < 10 m/s 832.8 ft/s)
1)
2)
Two-channel operationT
he transmitter is able to operate two independent measuring channels (measuring channel 1 and measuring
channel 2). A pair of sensors is connected per measuring channel. Both measuring channels operate
independently of one another and are supported by the transmitter to an equal extent.
Two-channel operation can be used for the following measurements:
• Two-channel measurement = flow measurement at two separate measuring points
• Two-path measurement = redundant flow measurement at one measuring point
Two-channel measurement
The flow is measured at two separate measuring points in the case of two-channel measurement.
The measured values of the two measuring channels can be processed and displayed differently.
The following measured values can be output for two-channel measurement:
• Individual measured values per measuring channel (output independently of one another)
• The difference between the two measured values
• The sum of the two measured values
The two measuring channels can be configured individually. This makes it possible to independently configure
and select the display, outputs, sensor type and type of installation.
6Endress+Hauser
Proline Prosonic Flow 93W
BA
BA
A0001159
Two-channel measurement: example of arranging sensor pairs at two separate measuring points
AMeasuring channel 1: mounting the sensor pair for measurement via two traverses
BMeasuring channel 2: mounting the sensor pair for measurement via one traverse
Two-path measurement
The flow is measured redundantly at one measuring point in the case of two-path measurement.
The measured values of the two measuring channels can be processed and displayed differently.
The following measured values can be output for two-path measurement:
• Individual measured values per measuring channel (output independently of one another)
• The average of the two measured values
The "Averaging" function generally provides you with a more stable measured value. The function is thus
suitable for measurements under conditions that are not ideal (e.g. short inlet runs).
The two measuring channels can be configured individually. This makes it possible to independently configure
and select the display, outputs, sensor type and type of installation.
It is generally not necessary to individually configure the two measuring channels in the case of two-path
measurement. However, in certain situations individual channel configuration can be used to balance out
application-specific asymmetries.
A0001160
Two-path measurement: examples of arranging sensor pairs at one measuring point
AMeasuring channel 1 and measuring channel 2: mounting the sensor pair for measurement via two traverses
BMeasuring channel 1 and measuring channel 2: mounting the sensor pair for measurement via one traverse
Endress+Hauser7
Input
Measured variableFlow velocity (transit time difference proportional to flow velocity)
Measuring rangeTypically v = 0 to 15 m/s (0 to 50 ft/s)
– Active: 0/4 to 20 mA, R
– Passive: 4 to 20 mA, max. 30 V DC, R
• Time constant selectable (0.01 to 100 s)
• Full scale value adjustable
• Temperature coefficient: typ. 0.005 % o.r./°C (o.r. = of reading)
• Resolution: 0.5 μA
Pulse/frequency output
• Galvanically isolated
• Active/passive selectable
– Active: 24 V DC, 25 mA (max. 250 mA during 20 ms), RL > 100 Ω
– Passive: open collector, 30 V DC, 250 mA
• Time constant selectable (0.05 to 100 s)
• Frequency output
– End frequency: 2 to 10000 Hz (f
– 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)
– As of a frequency of 1 / (2 × pulse width), the on/off ratio is 1:1
< 700 Ω (for HART: RL ≥ 250 Ω)
L
≤ 150 Ω
i
= 12500 Hz)
max
Proline Prosonic Flow 93W
PROFIBUS DP interface
• PROFIBUS DP in accordance with EN 50170 Volume 2
• Profile version 3.0
• Data transmission rate: 9.6 kBaud to 12 MBaud
• Automatic data transmission rate recognition
• Signal encoding = NRZ Code
• Function blocks: 8 × Analog input (AI), 3 × 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), zero point adjustment, measuring mode, totalizer control
• Bus address adjustable via miniature switches or local display (optional) at the measuring device
• Available output combination → ä 10
8Endress+Hauser
Proline Prosonic Flow 93W
PROFIBUS PA interface:
• 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 × Analog Input (AI), 3 × 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
FOUNDATION Fieldbus interface:
• 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 × Analog Input (AI), 1 × Discrete Output, 1 × 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, difference, volume flow, 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
Low flow cutoffSwitch points for low flow are selectable
Galvanic isolationAll circuits for inputs, outputs, and power supply are galvanically isolated from each other.
Endress+Hauser9
Electrical connection,
HART*
PROFIBUS DP**
27
25
23
21
2
1
26
24
22
20
L1 (L+)
N (L-)
–
–
–
+
+
+
PROFIBUS PA*
FOUNDATION Fieldbus*
PA(–)/FF(–)
27
25
23
21
2
1
26
24
22
20
L1 (L+)
N (L-)
–
–
–
+
+
+
A (RxD/TxD-N)
B (RxD/TxD-P)
PA(+)/FF(+)
d
c
e
b
–27
–25
–23
–21
+26
+24
+22
+20
N (L-) 2
L1 (L+)1
25
23
21
2
1
24
22
20
L1 (L+)
N (L-)
–
–
–
+
+
+
27
26
A (RxD/TxD-N)
B (RxD/TxD-P)
d
c
e
b
d
c
e
b
g
d
c
e
b
g
PROFIBUS DP*
ff
ff
a
A
(d)
b
d/(g)
measuring unit
Proline Prosonic Flow 93W
Power supply
Connecting the transmitter, cable cross-section max. 2.5 mm2 (14 AWG)
AView A (wall-mount housing)
*)fixed communication boards
**)flexible communication boards
aConnection compartment cover
bCable for power supply: 85 to 260 V AC / 20 to 55 V AC / 16 to 62 V DC
cGround terminal for protective conductor
dSignal cable: see terminal assignment → ä 11
eGround terminal for signal cable shield / Fieldbus cable
fService adapter for connecting service interface FXA193 (Fieldcheck, FieldCare)
gSignal cable: see terminal assignment → ä 11
- Terminal No. 1: L1 for AC, L+ for DC
- Terminal No. 2: N for AC, L– for DC
Fieldbus cable:
- Terminal No. 26: DP (B) / PA (+) / FF (+) with polarity protection
- Terminal No. 27: DP (A) / PA (–) / FF (–) with polarity protection
Cable for external termination (only for PROFIBUS DP with fixed assignment communication board):
- Terminal No. 24: +5 V
- Terminal No. 25: DGNDA
A0013924
10Endress+Hauser
Loading...
+ 22 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.