Endress+Hauser prosonic flow 92 Manual

Technical Information
TI 060D/06/en
50102085
Portable Ultrasonic Flow Measuring
System
prosonic flow 92
Temporary volume flow measurement of liquids
with “Clamp On” sensors
Features and benefits
• Portable transmitter, battery operated,
for temporary measurements
• Built-in data logger with a capacity of
40000 measuring values
• Site Setup operating menus for
straightforward commissioning of up to
20 measurement sites
• “Clamp On” sensors, non-contact
measurement technique
• The sensors are affixed to the piping
from the outside
• Very wide range of nominal diameters
Sensors U DN 15...100
Sensors W DN 50...4000
• Wide temperature range of
–20…+80 °C
• Measuring transmitter in protected
handheld housing in: IP 50
• Sensors U in: IP 52
Sensors W in:
– IP 67 Sensorbody
– IP 52 BNC adapter
• Interfaces
– Data readout software for use with a
personal computer
– Current in- and outputs (4...20 mA)
Application
Ideally suited for temporary, bidirectional
measurement of pure or slightly soiled
liquids with a gas content of < 1% or a
solids content of < 5%.
• Application examples:
– Water, wastewater etc.
– Ultrapure water with low conductivity
– Process facilities
• The “Clamp On” sensors are equally
suitable for homogeneous piping as for
piping made of composite materials:
– steel, plastic, GRP and glass pipes
– Lined pipes

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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 transmitted in both directions from one measuring sensor to the
other. As the signal 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 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.
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 measures the sound velocity in the liquid. The sound
velocity can be used to distinguish different liquids or as a measure of product quality. You can
carry out application-specific calibrations of Prosonic Flow in the field using the Site Setup.
Signal propagation time
For accurate measurement, the ultrasonic signal needs a certain minimum signal propagation
time [t].
The measuring accuracy increases with the length of the signal propagation time (t) in a liquid.
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tt/2 t/2
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Sensor arrangement Prosonic Flow W/U
The Prosonic Flow W sensors offer a choice between 1, 2 and 4 traverses and the Prosonic Flow
U sensors 2 traverses. Please note that the more reflection points there are in the pipe, the more
the signal strength decreases. (Example: 2 traverses = 1 reflection point, etc.)
Prosonic Flow W: 1 = 1 traverse, 2 = 2 traverses, 4 = 4 traverses
Prosonic Flow U: 2 = 2 traverses
Therefore, to maintain good signal quality, you should choose as few traverses as necessary to
achieve a sufficient transit time difference.
Recommendations:
To obtain optimum signal strength and the highest level of accuracy, we recommend the following:
•DN 15...50 →2 traverses
•DN 50...60 →2/4 traverses
•DN 80...600 →2 traverses
•DN 650...4000 →1 traverse
Sensor selection
Prosonic Flow U sensor type: DN 15...100
Prosonic Flow W sensor types (two versions): DN 50...300 and DN 100...4000.
•Both sensor types can be used in the DN 100...300 range.
•The W sensor type DN 50...300 should be used for a wall thickness < 4 mm and sensor type
DN 100...4000 for a wall thickness > 4 mm.
Commissioning accessories
During mounting and commissioning, in order to determine the sensor distance, you require data
on the measurement liquid, the pipe material used and the exact pipe dimensions. Data on the
most common liquids, pipe materials and lining materials are programmed into the
Prosonic Flow 92 program.
For liquids:
WATER –SEA WATER –DISTILLED WATER –AMMONIA –ALCOHOL –BENZENE –BROMIDE –
ETHANOL –GLYCOL –KEROSENE –MILK –METHANOL –TOLUOL –LUBRICATING OIL –FUEL
OIL –PETROL
For pipe materials:
CARBON STEEL –STAINLESS STEEL –CAST IRON –COPPER –PVC –ALUMINIUM –DUCTILE
IRON –ASBESTOS CEMENT –GRP –PEEK –PVDF –ACRYLIC GLASS
Liner material:
TAR EPOXY –MORTAR –RUBBER –TEFLON –GLASS PYREX –PVC
If your pipe material or liquid is not included in the pre-programmed selection of the transmitter
establish the missing data from the technical literature.
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Measuring system The measuring system consists of the following transmitter and flow measuring sensors.
Overview of components:
1 = Prosonic Flow 92 transmitter; 2 = Prosonic Flow W sensors, sensor holders and spacing ruler;
3 = Prosonic Flow U sensor assembly; 4 = Sensor connecting cables; 5 = Power adapter;
6 = Tensioning bands; 7 = Coupling medium; 8 = Carrying case
Measuring transmitter
Prosonic Flow 92 •For operation in the non hazardous area.
•Battery operation (power adapter included)
•Graphic display
•Configuration with push buttons
•Site Setup
•Data logger
•Volume and sound velocity measurement
•Single channel measurement
•Degree of protection IP 50
•Operation with Prosonic Flow W/U/P sensors
Flow measuring sensors
Prosonic Flow W •Clamp On flow measuring sensors
•Sensor pair for flow measurement and sound velocity in the
liquid during operation.
•2 sensor types for DN 50...4000 (2"...160")
•Temperature range -20...+80 °C
•Stainless steel sensor holders
•Degree of protection:
–Sensorbody in IP 67
–BNC adapter in IP 52
•Adaptor plug for BNC cables
Prosonic Flow U •Clamp On flow measuring sensors for small pipe diameters.
•Sensor pair for flow measurement and sound velocity in the
liquid during operation.
•1 sensor type for DN 15...100 (0.6"...4")
•Temperature range -20...+80 °C
•Plastic/Aluminum sensor assembly
•Degree of protection IP 52
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Input
Measured variable Flow velocity (differential delay proportional to flow velocity)
Measuring range Prosonic Flow W/U sensors typically v = 0...7 m/s at the specified measuring accuracy
Operable flow range over 70 : 1
Input signal Current input: 4...20 mA, galvanically not isolated, for input of externally measured variable
(Display and data logging)
Output
Output signal Current output: active 4...20 mA, RL= 0...1 kΩ, galvanically isolated (from ground and analog
input)
Signal on alarm Current output → failsafe mode selectable
Load see “Output signal”
Low flow cutoff Switch points for low flow cutoff are selectable
Galvanic isolation All circuits for outputs and power supply are galvanically isolated from each other.
Power supply
Electrical connection
measuring unit
Power supply by built-in battery
To charge the battery, turn off the instrument power and connect the AC power adapter to the
device as shown below. The “FAST CHARGE”LED is lighted in red, and the “DC IN”LED is lighted
in green. When the instrument is fully charged, the “FAST CHARGE”LED flashes in red. With a
fully charged battery pack, the instrument can measure for about 5 hours (with the backlight
turned off). The time required for charging is approximately 3 hours.
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Power supply by power adapter
A = View A
–1 = 17.5 V DC connector
–2 = AC power adapter for power supply and recharging the battery:
100...240 V AC, 47...63 Hz, Power consumption ≤12 W
Don’t use other power adapters, or it may result in an accident or in damage of the device.
The following mains connector adapters are delivered with the power supply:
1 = European standard
2 = GB standard
3 = USA/Japan standard
4 = Australien standard
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Electrical connection:
sensor cable connection
A = View A
–1 = Upstream sensor cable
–2 = Downstream sensor cable
Electrical connection:
analog input/output
connection
A = View A
–1 = Analog input/output connector
–2 = Analog output wires; 2.1 = red (+); 2.2 = black (-)
–3 = Analog input wires; 3.1 = red (+); 3.2 = black (-)
Potential equalisation Special measures for potential equalisation are not necessary.
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Cable connection Power supply connection of standard power supply (1)
Signal cable connection (input/output), circular connector, 4 pin (2)
Sensor cable connection (up stream/down stream), BNC connector (3)
Cable connections at the transmitter
Serial communication connection for data logging:
•D-SUB, 9 pin
D-SUB, 9 pin, socket
Pin Item Color
a
b
c
d
Analog input +
Analog output -
Analog input -
Analog output +
black
red
white
blue
Pin No. Symbol Item
1
2
3
4
5
6
7
8
9
–
R x D
T x D
D T R
G N D
D S R
R T S
C T S
–
–
Recive data
Send data
Data terminal ready
Signal ground
Data set ready
Send request
Send ready
–
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Cable specifications Sensor cable:
•Special type coaxial cable.
•Use the ready-to-use cables supplied by E+H.
•The cables are available in lengths of 5 m and 10 m.
Mains connector adapters:
•Country specific mains connector adapters for mains supply connection.
Operation in zones of severe electrical interference:
The measuring device complies with the general safety requirements in accordance with
EN 61010, the EMC requirements of EN 61326.
Supply voltage Transmitter:
•Built-in battery
Special type Ni-Cd battery
Continuous operation time up to 5 hours (backlight OFF)
Recharching time 3 hours (power adaptor used)
•Special type power adaptor
100...240 V AC, 47...63 Hz
Flow measuring sensors:
•powered by the transmitter
Power consumption DC: < 12 W (incl. sensor)
Power supply failure Memory backup with lithium battery (lifetime approx. 5 years)
Performance characteristics
Reference operating
conditions
•Liquid temperature: +28 °C ± 2 K
•Ambient temperature: +22 °C ± 2 K
•Warm-up period: 30 minutes
Installation:
•Inlet run > 10 x DN
•Outlet run > 5 x DN
•Sensors grounded.
•The measuring sensors are correctly installed.
Maximum measured error For flow velocities between 0.5 m/s and 7 m/s and a Reynolds number of > 10000, the system
accuracy is:
± 0.5 % o.r. (of current reading)
The system is dry calibrated. The calibration factor by dry calibration is calculated based on the
actual pipe and liquid properties. This dry calibration procedure results in an additional uncer-
tainty for the measurement. The resulting accuracy of the measurement therefore is better than
2 % typically.
The zero point instability is < 10 mm/s.
Repeatability ± 0.3 % for flow velocities > 0.5 m/s

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Operating conditions
Installation conditions
Installation instructions Mounting location
Correct measuring is possible only if the pipe is full. Avoid the following locations:
•Highest point of a pipeline. Risk of air accumulating.
•Directly upstream of a free pipe outlet in a vertical pipe.
Vertical pipes
Notwithstanding the above, the installation proposal below permits installation in an open vertical
pipe. Pipe restrictors or the use of an orifice with a smaller cross-section than the nominal diam-
eter prevent the pipe from running empty while measurement is in progress.
Installation in a vertical pipe
1 = Supply tank, 2 = Flow measuring sensors, 3 = Orifice plate, pipe restriction, 4 = Valve, 5 = Filling tank
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1
2
3
4
5
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