FMU30液位计说明书(英文)
TI440F/00/EN/12.0971105940
Technical Information
Prosonic T FMU30
Ultrasonic Level Measurement
Compact transmitters for non-contact level measurement of fluids,
pastes and coarse bulk materials
Application
?Continuous, non-contact level measurement in fluids, pastes, sullages and coarse bulk materials ?System integration via 4 to 20mA ?Maximum measuring range:
–1?" sensor: 5m (16 ft) in fluids 2m (6 ft) in bulk materials –2" sensor: 8m (26 ft) in fluids 3.5 m (11 ft) in bulk materials
Features and benefits
?Quick and simple commissioning via menu-guided on-site operation with four-line plain text display ?Envelope curves on the on-site display for simple diagnosis
?Linearisation function (up to 32 points) for conversion of the measured value into any unit of length, volume or flow rate
?Non-contact measurement method minimizes service requirements
?Installation possible from thread G 1?“ or 1? NPT upwards
?Integrated temperature sensor for automatic correction of the temperature dependent sound velocity
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Inhaltsverzeichnis
Function and system design. . . . . . . . . . . . . . . . . . . . .2
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Equipment architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Operating frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Output damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Linearisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Auxiliary energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Terminal compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Cable gland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Performance characteristics. . . . . . . . . . . . . . . . . . . .10
Reaction time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 10Measured value resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Pulse frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Measuring error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Influence of the vapor pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . .11
Installation variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Installation conditions for level measurements . . . . . . . . . . . . . . 12Installation in narrow shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Installation conditions for flow measurements . . . . . . . . . . . . . . . 13Blocking distance, nozzle installation . . . . . . . . . . . . . . . . . . . . . 14
Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . .15
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Resistance to alternating temperature cycles . . . . . . . . . . . . . . . . 15Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 15
Process conditions. . . . . . . . . . . . . . . . . . . . . . . . . . .15
Process temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Process pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mechanical construction . . . . . . . . . . . . . . . . . . . . . .16
Design; dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Housing design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Process connection, sensor material, matching layer . . . . . . . . . . 16
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . . . 17On-site operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Certificates and Approvals. . . . . . . . . . . . . . . . . . . . .21
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21External standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . 21
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . .22
FMU30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Installation bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Screw in flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Cantilever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Mounting Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Wall Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Commubox FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27ToF Adapter FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Supplementary documentation . . . . . . . . . . . . . . . . .27
Operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Description of device functions . . . . . . . . . . . . . . . . . . . . . . . . . . 27Short instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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Function and system design
Measuring principle
E: Empty distance F: Span (full distance)
D: Distance from sensor membrane - product surface L: Level
BD: Blocking distance SD: Safety distance
Time-of-flight method
The sensor of the instrument transmits ultrasonic pulses in the direction of the product surface. There, they are reflected back and received by the sensor. The instrument measures the time t between pulse transmission and reception. The instrument uses the time t (and the velocity of sound c) to calculate the distance D between the sensor membrane and the product surface:D = c ? t/2
As the device knows the empty distance E from a user entry, it can calculate the level as follows:L = E - D
An integrated temperature sensor compensates for changes in the velocity of sound caused by temperature changes.
Interference echo suppression
The interference echo suppression feature on the instrument ensures that interference echos (e.g. from edges, welded joints and installations) are not interpreted as a level echo.Calibration
Enter the empty distance E and the span F to calibrate the device.Blocking distance
Span F may not extend into the blocking distance BD. Level echos from the blocking distance cannot be evaluated due to the transient characteristics of the sensor.
Sensor BD
Max. range fluids Max. range bulk materials 1?"0.25 m (0.8 ft) 5 m (16 ft) 2 m (6.6 ft)2"
0.35 m (1.1 ft)
8 m (26 ft)
3.5 m (11 ft)
Prosonic T FMU30 Equipment architecture The complete measuring system consists of:
On-site operation
?with display and operating module
?with a PC, Commubox FXA291 + ToF Adapter FXA291 and the operating software FieldCare
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Input
Measured variable
The distance D between the sensor membrane and the product surface is measured, see also figure →?https://www.wendangku.net/doc/301006861.html,ing the linearisation function, the device uses D to calculate:?level L in any units ?volume V in any units
?flow Q across measuring weirs or open channels in any units
Measuring range
The measuring range is limited by the range of a sensor. The sensor range is, in turn, dependent on the
operating conditions. To estimate the actual range, proceed as follows (see also the calculation example in the diagram):1.Determine which of the influences shown in the following table are appropriate for your process.2.Add the corresponding attenuation values.
3.
From the total attenuation, use the diagram to calculate the range.
Fluid surface Attenuation Calm 0 dB Waves
5 to 10 dB Strong turbulence (e.g. stirrers)10 to 20 dB Foaming
Ask Endress+Hauser
Bulk material surface Attenuation Hard, rough (e.g. rubble)
40 dB Soft (e.g. peat, dust-covered clinker)
40 to 60 dB
Dust
Attenuation No dust formation 0 dB Little dust formation 5 dB Heavy dust formation
5 to 20 dB
Filling curtain in detection range Attenuation None
0 dB Small quantities 5 to 10 dB Large quantities
10 to 40 dB
Temperature difference between sensor and product surface Attenuation to 20 °C (68 °F)0 dB to 40 °C (104 °F) 5 to 10 dB to 60 °C (140 °F)
10 to 15 dB
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Example
Operating frequency
?strong turbulence surface approx. 20 dB
?no dust formation 0 dB ?Filling curtain in detection range
10 dB ?Temperature diff. < 20°C
0 dB
=> range approx. 7.8 m (26 ft) for FMU30 2" sensor
1?" sensor 2" sensor approx. 70 kHz
approx. 50 kHz
Prosonic T FMU30
Output
Output signal 4 to 20 mA
Signal on alarm Error information can be accessed via the following interfaces:
?On-site display (error symbol, error code and plain text description)
?Current output (error current configurable)
Output damping Freely selectable, 0 to 255s
Linearisation The linearisation function of the instrument allows conversion of the measured value into any unit of length or
volume. In open channels or measuring weirs, also a flow linearistion is possible (calculation of the flow from
the measured level).
The linearisation table for calculating the volume in an horizontal cylindrical tank is preprogrammed. You can
also enter any number of other tables containing up to 32 value pairs either manually or semi-automatically (by
filling the vessel under controlled conditions).
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Auxiliary energy
Terminal compartment
The terminals are located underneath the housing cover.
A: terminals
B: optional: display
C: internal earth terminal D: external earth terminal
Terminal assignment
?Connect the connecting line to the screw terminals (line cross-sections of 0.25 to 2.5mm (0.01 to 0.1 in)) in the terminal compartment.
?A standard installation cable is sufficient for the connection.
?Protective circuitry against reverse polarity, RFI and over-voltage peaks is built into the device (see also Technical Information TI241F/00/EN "EMC Test Procedures")
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Supply voltage The following values are the voltages across the terminals directly at the instrument:
Terminals Cable cross-section: 0.25 to 2.5 mm 2 (20 to 14 AWG)Cable entry G ? or ? NPT
Cable gland M20x1.5 (recommended cable diameter 6 to 10mm (0.24 to 0.39 in))Power consumption 51 mW to 800 mW Current consumption
3.6 to 22 mA
Current consumption
Terminal voltage minimum
Terminal voltage maximum
4 mA 14 V 3
5 V 20 mA
8 V
35 V
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Performance characteristics
Reaction time The reaction time depends on the parameter settings. The minimum value is: min. 2 s Reference operating conditions
?Temperature = +20 °C (68 °F)
?Pressure = 1013 mbar abs. (15 psi abs.)?Humidity = 50 %
?Ideal reflective surface (e.g. calm, smooth fluid surface)?No interference reflections within signal beam ?
Set application parameters:–Tank shape = flat ceiling –Medium property = liquid
–process conditions = calm surface
Measured value resolution 1 mm (0.04 in)
Pulse frequency
max. 0.5Hz
The exact values are dependent on the type of device and the parameter settings.
Measuring error
Typical specifications for reference operating conditions (include linearity, repeatability, and hysteresis): ±3 mm (±0.12 in) or 0.2% of set measuring distance (empty calibration)1
1
whichever is greater
Influence of the vapor pressure
The vapor pressure at 20 °C (68 °F) gives a hint on the accuracy of the ultrasonic level measurement. If the vapor pressure at 20 °C (68 °F) is below 50 mbar (1 psi), ultrasonic level measurement is possible with a very high accuracy. This is valid for water, aqueous solutions, water-solid-solutions, dilute acids (hydrochloric acid, sulfuric acid, ...), dilute bases (caustic soda, ...), oils, greases, slurries, pastes, ...
High vapor pressures or outgassing media (ethanol, acetone, ammonia, ...) can influence the accuracy. If conditions like these are present, please contact the Endress+Hauser support.
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Installation conditions
Installation variants
A:Installation with counter nut (1: counter nut (PC) supplied for G1? and G2 instruments)B:Installation with sleeve (1: sealing ring (EPDM) supplied)C:Installation with installation bracket D:
Installation with screw in flange 1:screw in flange
2:sealing ring (EPDM) supplied 3:sensor 4:rozzle
For installation bracket or screw in flange →?23, "Accessories".
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Installation conditions for level measurements
?Do not install the sensor in the middle of the tank (3). We recommend leaving a distance between the sensor and the tank wall (1) measuring 1/3 of the tank diameter.?Protect the device against direct sun or rain (2).?Avoid measurements through the filling curtain (4).
?For solid application where bulk solid cones appear, align the sensor membrane perpendicular to the surface.?Make sure that equipment (5) such as limit switches, temperature sensors, etc. are not located within the emitting angle α. In particular, symmetrical equipment (6) such as heating coils, baffles etc. can influence measurement.
?Never install two ultrasonic measuring devices in a tank, as the two signals may affect each other.?To estimate the detection range, use the 3 dB emitting angle α.
Installation in narrow shafts
Sensor αL max r max
1?"11° 5 m (16 ft)0.48 m (1.6 ft)2"
11°
8 m (26 ft)
0.77 m (2.5 ft)
In narrow shafts with strong interference echoes, we recommend using an ultrasound guide pipe (e.g. PE or PVC wastewater pipe) with a minimum diameter of 100mm (3.94 in).
Make sure that the pipe is not soiled by accumulated dirt. If necessary, clean the pipe at regular intervals.
A:venting hole
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Installation conditions for flow measurements
?Install the instrument at the inflow side (B), as close above the maximum water level H max as possible (take into account the blocking distance BD).
?Position the instrument in the middle of the channel or weir.?Align the sensor membrane parallel to the water surface.?Keep to the installation distance of the channel or weir.Example: Khafagi-Venturi flume
A: Khafagi-Venturi flume;B: inflow; C: outflow; E: empty calibration; V: direction of flow
Example: Triangular weir
V
e m p t y c a l i b r
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Blocking distance,nozzle installation
Install the instrument at a height so that the blocking distance BD is not undershot, even at maximum fill level. Use a pipe nozzle if you cannot maintain the blocking distance in any other way. The interior of the nozzle must be smooth and may not contain any edges or welded joints. In particular, there should be no burr on the inside of the tank side nozzle end. Note the specified limits for nozzle diameter and length. To minimise disturbing factors, we recommend an angled socket edge (ideally 45°).
BD: blocking distance; SD: safety distance; E: empty calibration; F: full calibration (span); D: nozzle diameter; L: nozzle length
"Caution!
If the blocking distance is undershot, it may cause device malfunction.
!
Note!
In order to notice if the level approaches the blocking distance, you can specify a safety distance (SD). If the level is within this safety distance, the instrument outputs a warning or alarm message.
D
Maximum nozzle length mm (in)
Nozzle diameter 1?" sensor 2" sensor
DN50/2"80 (3.15)DN80/3"240 (9.45)240 (9.45)DN100/4"300 (11.8)300 (11.8)DN150/6"400 (15.7)400 (15.7)DN200/8"400 (15.7)400 (15.7)DN250/10"400 (15.7)400 (15.7)DN300/12"400 (15.7)400 (15.7)Emitting angle α11°11°Blocking distance m (ft)0.25 (0.8)0.35 (1.1)Max. range m (ft) in liquids 5 (16)8 (26)Max. range m (ft) in solids
2 (6.6)
3.5 (11)
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Ambient conditions
Ambient temperature
-20°C to +60°C (-4 °F to 140 °F)
If the device is operated outdoors, protect the device against direct sun or rain.Storage temperature -40°C to +80°C (-40 °F to 176 °F)
Resistance to alternating temperature cycles to DIN EN 60068-2-14; Nb test : +60°C/-20°C (140 °F/-4 °F), 0.5K/min, 100cycles
Climate class DIN EN 60068-2-38 (Test Z/AD) DIN/IEC 68 T2-30Db Ingress protection
?With closed housing, tested according to –IP 68–IP 66
?With open housing: IP 20 (also ingress protection of the display)
Vibration resistance
DIN EN 60068-2-64 / IEC 68-2-64: 20 to 2000 Hz, 1 (m/s 2)2/Hz; 3 x 100 min
Electromagnetic compatibility (EMC)
Electromagnetic compatibility to EN 61326. For details refer to the declaration of conformity.Influence of EMC < 1% FS
Process conditions
Process temperature
-20°C to +60°C (-4 °F to 140 °F)
A temperature sensor is integrated in the sensor for correction of the temperature-dependent time-of-flight.Process pressure
0.7 bar to 3 bar abs. (10.15 psi to 43.5 psi)
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Mechanical construction
Design; dimensions
Weight
Housing design Types of housings F16 housing Material
?Housing: PBT-FR ?Cover: PBT/PA Cover
?for version without on-site display (low, grey)?for version with on-site display (high, transparent)
Process connection,sensor material,matching layer
1?" sensor
2" sensor
approx. 0.75 kg (1.65 lbs)
approx. 0.8 kg (1.76 lbs)
Sensor Process connection Material in contact with process 1?"?Thread G 1?“
?Thread NPT 1?“ - 11.5Sensor: PP
Matching Layer EPDM 2"
?Thread 2"
?Thread NPT 2" - 11.5
Sensor: PP
Matching Layer EPDM
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Human interface
Display and operating elements
The LCD module for display and operation is located beneath the housing cover. Open the cover to operate the device.
1: Display symbol; 2: Function keys; 3: Display (rotatable); 4: Plug-in module
Symbol in display
continuous
flashing Meaning
Alarm
Warning
Security Locking
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Function of the keys
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On-site operation Operation
The LC-Display allows configuration via 3 keys directly at the instrument. All device functions can be set through a menu system. The menu consists of function groups and functions. Within a function, application parameters can be read or adjusted. The user is guided through a complete configuration procedure.
L00-FMU30xxx-07-00-00-en-004
Remote operation Operation with FieldCare
FieldCare is Endress+Hauser's FDT based Plant Asset Management Tool. It can configure all intelligent field devices in your plant and supports you in managing them. By using status information, it also provides a simple but effective means of checking their health.?Supports Ethernet, HART, PROFIBUS PA, FOUNDATION Fieldbus etc.?Operates all Endress+Hauser devices
?Operates all third-party actuators, I/O systems and sensors supporting the FDT standard ?Ensures full functionality for all devices with DTMs
?
Offers generic profile operation for any third-party fieldbus device that does not have a vendor DTM
Connection for FMU30:
?Commubox FXA291 and ToF adapter FXA291 (available as accessory)
Using the following functions:
?Signal analysis via envelope curve
?Linearisation table (graphically supported creation, editing, importing and exporting)?Loading and saving of instrument data (Upload/Download)?Documentation of measuring point
Main value Unit
Symbol Help text
Bargraph
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Menu-guided commissioning:
Signal analysis via envelope curve: