Endress+Hauser FMU40 Specifications
TI00365F/00/EN/17.14
71275861
Products Solutions Services
Technical Information
Prosonic M
FMU40, FMU41, FMU42,
FMU43, FMU44
Ultrasonic Level Measurement
Compact transmitters for non-contact level
measurement
Application
• Continuous, non-contact level measurement in fluids, pastes, sullages and coarse
bulk materials
• Flow measurement in open channels and measuring weirs
• System integration via:
– HART (standard), 4 to 20mA
–PROFIBUS PA
–FOUNDATION Fieldbus
• Maximum measuring range:
– FMU40: 5 m (16 ft) in fluids, 2 m (6.6 ft) in bulk materials
– FMU41: 8 m (26 ft) in fluids, 3,5 m (11 ft) in bulk materials
– FMU42: 10 m (33 ft) in fluids, 5 m (16 ft) in bulk materials
– FMU43: 15 m (49 ft) in fluids, 7 m (23 ft) in bulk materials
– FMU44: 20 m (66 ft) in fluids, 10 m (33 ft) in bulk materials
Features and benefits
• Quick and simple commissioning via menu-guided on-site operation with four-line,
multilingual plain text display
• Envelope curves on the on-site display for simple diagnosis
• Easy remote operation, diagnosis and measuring point documentation with the free
operating program FieldCare supplied.
• Suitable for explosion hazardous areas
(Gas-Ex, Dust-Ex)
• Linearization 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
• Optional remote display and operation (up to 20 m (66 ft) from transmitter)
• Installation possible from thread G 1½“ or 1½“ NPT upwards
• Integrated temperature sensor for automatic correction of the temperature
dependent sound velocity
Table of contents
Prosonic M
Function and system design . . . . . . . . . . . . . . . . . . . . . .3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Equipment architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operating frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Load HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Linearization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Terminal compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fieldbus plug connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Current consumption (2 wire instruments) . . . . . . . . . . . . . . 14
HART ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Max. noise HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance characteristics . . . . . . . . . . . . . . . . . . . . 15
Reaction time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . 15
Measured value resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pulse frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maximum measuring error . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Typical measuring error
Influence of the vapor pressure . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation variants FMU40, FMU41 . . . . . . . . . . . . . . . . . . . . 16
Installation variants FMU42, FMU44 . . . . . . . . . . . . . . . . . . . . 17
Installation variants FMU43 . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installation conditions for level measurements . . . . . . . . . . . . 17
Installation in narrow shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installation conditions for flow measurements . . . . . . . . . . . . 18
Blocking distance, nozzle installation . . . . . . . . . . . . . . . . . . . . 20
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Resistance to alternating temperature cycles . . . . . . . . . . . . . 21
Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . 21
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Process temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Process pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . . 22
Design; dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Housing design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Process connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Material (not in contact with process) . . . . . . . . . . . . . . . . . . . 26
Material (in contact with process) . . . . . . . . . . . . . . . . . . . . . . 27
Operability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . . 28
On-site operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Certificates and Approvals. . . . . . . . . . . . . . . . . . . . . . 31
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
External standards and guidelines . . . . . . . . . . . . . . . . . . . . . . 31
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Product structure FMU40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Product structure FMU41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Product structure FMU42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Product structure FMU43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Product structure FMU44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3-point linearity protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5-point linearity protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Weather protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Installation bracket for FMU40, FMU41 . . . . . . . . . . . . . . . . . 43
Screw in flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cantilever with mounting frame or wall bracket . . . . . . . . . . . 45
Commubox FXA195 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Commubox FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
ToF Adapter FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Remote display FHX40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Description of device functions . . . . . . . . . . . . . . . . . . . . . . . . . 51
Short instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Safety Instructions ATEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Safety Instructions NEPSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Safety Instructions
INMETRO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Control drawings Installation drawings . . . . . . . . . . . . . . . . . . 55
2 Endress+Hauser
Prosonic M
20 mA
100%
4 mA
0%
D
L
F
E
BD
Measuring principle
Function and system design
BD Blocking distance D Distance from sensor membrane - product surface
E Empty distance F Span (full distance)
L Level
A0019264
Sensor BD Max. range fluids Max. range bulk materials
FMU40 0.25 (0.8) 5 (16) 2 (6.6)
FMU41 0.35 (1.1) 8 (26) 3.5 (11)
FMU42 0.4 (1.3) 10 (33) 5 (16)
FMU43 0.6 (2.0) 15 (49) 7 (23)
FMU44 0.5 (1.6) 20 (66) 10 (33)
Dimensions m (ft)
Time-of-flight method
The sensor of the Prosonic M transmits ultrasonic pulses in the direction of the product surface. There,
they are reflected back and received by the sensor. The Prosonic M 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 (NTC) compensates for changes in the velocity of sound caused by
temperature changes.
Interference echo suppression
The interference echo suppression feature on the Prosonic M 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 within the blocking distance cannot
be evaluated due to the transient characteristics of the sensor.
Endress+Hauser 3
Equipment architecture 4…20 mA output with HART protocol
ENDRESS + HAUSER
E
+–
%
ENDRESS + HAUSER
RMA422
2
4
6789
10
5
1
3
The complete measuring system consists of:
Prosonic M
A0019266
1 PLC (programmable logic controller)
2 Commubox FXA191 (RS232) or FXA195 (USB)
3 Computer with operating tool (e.g. FieldCare)
4 Commubox FXA291 with ToF Adapter FXA291
5 Power supply (for 4-wire)
6 Prosonic with display and operating modul
7 Field Xpert
8 VIATOR Bluetooth modem with connection cable
9 Connection for Commubox FXA191, FXA195 or Field Xpert
10 Transmitter supply unit RMA422 or RN221N (communication resistor included)
If the HART communication resistor is not built into the supply unit, it is necessary to insert a
communication resistor of 250 into the 2-wire line.
On-site operation
• With display and operating module,
• With a Personal Computer, FXA291 with ToF Adapter FXA291 (USB) and the operating software
"FieldCare". FieldCare is a graphical operating software for instruments (radar, ultrasonic, guided
microimpulse). It assists with commissioning, securing data, signal analysis and documentation of
the measuring point.
Remote operation
•With Field Xpert
• With a Personal Computer, Commubox FXA195 and the operating software "FieldCare"
4 Endress+Hauser
Prosonic M
ENDRESS + HAUSERENDRESS + HAUSER
T
1 3
211
10
4
5
6
7
89
ENDRESS + HAUSER
E+–
%
System integration using PROFIBUS PA
A maximum of 32 transmitters (8 if mounted in an explosion hazardous location Ex ia IIC according to
FISCO-model) can be connected to the bus.The segment coupler provides the operating voltage to the
bus. Both on-site as well as remote operation are possible. For further information on the cable
specifications, see Operating Instructions BA00034S/04/ENGuidelines for planning and
commissioning PROFIBUS DP/PA", PNO Guideline 2.092 "PROFIBUS PA User and Installation
Guideline" and IEC61158-2 (MBP).
1 Computer with Profiboard/Proficard and operating tool (FieldCare)
2PROFIBUS DP
3 PLC (programmable logic controller)
4 More functions (valves etc.)
5 Computer with operating tool (FieldCare)
6 Commubox FXA291 with ToF Adapter FXA291
7 Levelflex M
8Prosonic M
9 Micropilot M with display and operating modul
10 PROFIBUS PA
11 Segment coupler
A0019308
Endress+Hauser 5
Prosonic M
T
T
15
13
14
1
6
5
7
11
12
3
4
8910
2
System integration using FOUNDATION Fieldbus
A maximum of 32 transmitters (standard or Ex d) can be connected to the bus. For protection class
Ex ia: the maximum number of transmitters depends on the established rules and standards for
intrinsically safe circuits (EN 60070-14) and proof of instrinsic safety. Both on-site and remote
operation are possible.
A0019309
1 SPS, PLC, API
2 Personal computer, e.g. with NI-FBUS configurator
3 VIATOR Bluetooth modem with connection cable
4 Field Xpert
5 More functions (valves etc.)
6 FieldCare
7 Commubox FXA291 with ToF Adapter FXA291
8 Levelflex M
9Prosonic M
10 Micropilot M
11 Power conditioner
12 Power supply
13 FF link
14 FOUNDATION Fieldbus
15 Ethernet
6 Endress+Hauser
Prosonic M
FXN 671
mA1
+
FXN 671
mA1
+
FXN 671
mA1
+
ENDRESS + HAUSER
E+–
%
3
9
2
4
1
7
1011
8
5
6
System integration using Endress+Hauser Rackbus
You can interconnect a maximum of 64 2-wire devices with HART protocol to a Rackbus. Use an
FXN672 interface module for each device. You can integrate this bus into a higher-level bus by using
gateway.
A0019307
1 Interface FXN672
2 Personal computer with communication software
3Bus
4PLC
5 Gateway to MODBUS, FIP, PROFIBUS, INTERBUS etc.
6 4-20 mA HART
7 FieldCare
8 Commubox FXA291 with ToF Adapter FXA291
9 Levelflex M
10 Prosonic M
11 Micropilot M with display and operating modul
Note!
The FXN672 can be used with all 2-wire devices of the Prosonic M family.
Endress+Hauser 7
Prosonic M
-
ENDRESS+HAUSER
RN 221N
ENDRESS+HAUSER
RN 221N
.
20...45 V
DC
FXN 520
FXN 520
1
12
System integration via Fieldgate
Vendor Managed Inventory
By using Fieldgates to interrogate tank or silo levels remotely, suppliers of raw materials can provide
their regular customers with information about the current supplies at any time and, for example,
account for them in their own production planning. For their part, the Fieldgates monitor the
configured level limits and, if required, automatically activate the next supply. The spectrum of options
here ranges from a simple purchasing requisition via e-mail through to fully automatic order
administration by coupling XML data into the planning systems on both sides.
Remote maintenance of measuring equipment
Fieldgates not only transfer the current measured values, they also alert the responsible standby
personnel, if required, via e-mail or SMS. In the event of an alarm or also when performing routine
checks, service technicians can diagnose and configure connected HART devices remotely. All that is
required for this is the corresponding HART operating software (e.g. FieldCare) for the connected
device. Fieldgate passes on the information transparently, so that all options for the respective
operating software are available remotely. Some on-site service operations can be avoided by using
remote diagnosis and remote configuration and all others can at least be better planned and prepared.
The complete measuring system consists of devices and:
1 Fieldgate FXA520
2 Multidrop Connector FXN520
Note!
The number of instruments which can be connected in mutidrop mode can be calculated by the
"FieldNetCalc" program. A description of this program can be found in Technical Information
TI00400F/00/EN (Multidrop Conncector FXN520).
The program is available form your Endress+Hauser sales organisation or in the internet at:
"www.endress.com select your country download search: Fieldnetcalc
8 Endress+Hauser
A0019306
Prosonic M
Input
Measured variable The distance D between the sensor membrane and the product surface is measured.
Using the linearization 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 Please contact your Endress+Hauser sales representative.
Bulk material surface Attenuation
Hard, rough (e.g. rubble) 40 dB
Soft (e.g. peat, dust-covered
clinker)
Dust Attenuation
No dust formation 0 dB
Little dust formation 5 dB
Heavy dust formation 5 to 20 dB
Filling curtain in detection
range
None 0 dB
Small quantities 5 to 10 dB
Large quantities 10 to 40 dB
Temperature difference
between sensor and product
surface
to 20 °C (68 °F) 0 dB
to 40 °C (104 °F) 5 to 10 dB
to 80 °C (176 °F) 10 to 20 dB
40 to 60 dB
Attenuation
Attenuation
Endress+Hauser 9
Prosonic M
10 20 304050 607080
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
FMU44
A [dB]
R [m]
0
FMU43
FMU42
FMU41
FMU40
AAttenuation (dB)
RRange (m)
Example (for FMU43)
For typical solid applications, a certain amount of dust coverage is normally present. Therefore, the
following range results from the table and the diagram:
Operating frequency
• Dust-covered rubble approx. 50 dB
• No dust formation 0 dB
• No filling curtain in
detection range 0 dB
• Temperature diff. < 20°C 0 dB
approx. 50 dB range approx. 7 m (23 ft)
These measuring conditions have been taken into account during the calculation of the maximum
measuring range in solid applications.
Sensor Operating frequency
FMU40 approx. 70 kHz
FMU41 approx. 50 kHz
FMU42 approx. 42 kHz
FMU43 approx. 35 kHz
FMU44 approx. 30 kHz
10 Endress+Hauser
A0019268
Prosonic M
Output
Output signal According to the instrument version ordered:
• 4…20 mA with HART protocol
•PROFIBUS PA
• FOUNDATION Fieldbus
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, signal on error can be selected (e.g. according to NAMUR recommendation NE43)
• Digital interface
Load HART Minimum load for HART communication: 250
Output damping Freely selectable, 0 to 255 s
Linearization The linearization function of the Prosonic M allows conversion of the measured value into any unit of
length or volume. In open channels or measuring weirs, also a flow linearization is possible (calculation
of the flow from the measured level). The linearization 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).
The supplied FieldCare operating program can automatically calculate the table for any tank, weir or
flume and upload it into the device.
Flow curves for open channels can be calculated and entered into the instrument by the FieldCare as
well ( ä 29, "Operation with FieldCare").
Endress+Hauser 11
Prosonic M
1
A
B
2
1
4
AB
3
3
1234 5 612
L- L+ I+ I-
I+ I-
L1/L+ N/L-
4
1
5
Power supply
Terminal compartment In the F12 housing, the terminals are located underneath the housing cover. In the T12 housing, they
are under the cover of the separate terminal compartment.
A0019271
A F12 housing
B T12 housing
1 Sealed terminal compartment
Terminal assignment
A0019268
A Loop-powered version 3 Plant ground
B 4-wire version (active) 4 4-20 mA HART
1Power 5Display unit, recorder, PCS
2 Test clamp for testing of the signal current
• Connect the connecting line to the screw terminals (line cross-sections of 0.5 to 2.5mm (20 to
14 AWG)) in the terminal compartment.
• Use 2-wire twisted pair cable with screen for the connection.
• Protective circuitry against reverse polarity, RFI and over-voltage peaks is built into the device (see
also Technical Information TI00241F/00/EN "EMC Test Procedures") ä 21, "Electromagnetic
compatibility (EMC)".
• A standard installation cable is sufficient if only the analogue signal is used. Use a screened cable
when working with a superimposed communication signal (HART).
12 Endress+Hauser
Prosonic M
3
4
1
2
+–
3
1
2
3
4
1
2
+–
3
21
3
4
2
1
4
3
PROFIBUS PA
1T-Box
2PROFIBUS PA
3 Plant ground
A0019276
FOUNDATION Fieldbus
A0019275
The digital communication signal is transmitted to the bus via a 2-wire connection. The bus also
provides the auxiliary energy. Use 2-wire twisted pair cable with screen.
Refer to the following operating manuals for information on cable types, and how to set up and ground
the network:
• BA00034S "PROFIBUS DP/PA: "Guidelines for planning and commissioning PROFIBUS DP/PA", PNO
Guideline 2.092 "PROFIBUS PA User and Installation Guideline" and IEC61158-2 (MBP).
• BA00013S "FOUNDATION Fieldbus Overview", FONDATION Fieldbus Guideline and IEC61158-2
(MBP).
Fieldbus plug connectors For the versions with fieldbus plug connector (M12 or 7/8"), the signal line can be connected without
opening the housing.
Pin assignment of the M12 plug connector (PROFIBUS PA plug)
Pin Meaning
1Signal +
2not connected
3Signal -
4Ground
A0011175
Pin assignment of the 7/8" plug connector (FOUNDATION Fieldbus plug)
Pin Meaning
1Signal -
2Signal +
3Shield
4Not connected
A0011176
Supply voltage HART, 2-wire
The following values are the voltages across the terminals directly at the instrument:
Endress+Hauser 13
Prosonic M
Version
Standard
2-wire HART
Fixed current,
adjustable, e.g. for
solar power
operation
(measured value
via HART)
Fixed current for
HART multidrop
mode
1) Start-up current 11 mA
Ex ia
Ex d
Standard 11 mA 10 V 36 V
Ex ia 11 mA 10 V 30 V
Standard 4 mA
Ex ia 4 mA
Current
consumption
4 mA 14 V 36 V
20 mA 8 V 36 V
4 mA 14 V 30 V
20 mA 8 V 30 V
4 mA 14 V 30 V
20 mA 11 V 30 V
1)
1
Terminal voltage
minimum
14 V 36 V
14 V 30 V
HART, 4-wire, active
Version Voltage Max. load
DC 10.5 to 32 V 600
AC 50/60 Hz 90 to 253 V 600
Terminal voltage
maximum
Terminals Cable cross-section: 0.5 to 2.5 mm2 (20 to 14 AWG)
Cable entry • Cable gland: M20x1.5 (recommended cable diameter 6 to 10 mm (0.24 to 0.39 in))
• Cable entry G ½" or NPT ½"
• PROFIBUS PA M12 plug
• FOUNDATION Fieldbus 7/8" plug
Power consumption
Current consumption (2 wire instruments)
Version Power consumption
2-wire 51 mW to 800 mW
4-wire AC max. 4VA
4-wire DC; FMU40/41 330 mW to 830 mW
4-wire DC; FMU42/43 600 mW to 1 W
Communication Current consumption
HART 3.6 to 22 mA
PROFIBUS PA max. 13 mA
FOUNDATION Fieldbus max. 15 mA
HART ripple 47 to 125 Hz: Vpp = 200 mV (measured at 500 )
Max. noise HART 500 Hz to 10 kHz: Vrms = 2.2 mV (measured at 500 )
14 Endress+Hauser
Prosonic M
Galvanic isolation With 4-wire devices, the evaluation electronics and mains voltage are galvanically isolated from each
other.
Performance characteristics
Reaction time The reaction time depends on the parameter settings. The minimum values are:
• 2-wire devices (FMU40/41/42): min. 2 s
• 2-wire diveces (FMU43 - PROFIBUS PA or FOUNDATION Fieldbus): min. 2 s
• 2-wire devices (FMU44): min. 3 s
• 4-wire devices (FMU40/41/42/43/44): 0.5 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 = dome ceiling
– Medium property = liquid
– Process conditions = standard liquid
Measured value resolution
Sensor Measured value resolution
FMU40 1 mm (0.04 in)
FMU41 1 mm (0.04 in)
FMU42 2 mm (0.08 in)
FMU43 2 mm (0.08 in)
FMU44 2 mm (0.08 in)
Pulse frequency • 2-wire devices (FMU40/41/42): max. 0.5Hz
• 2-wire devices (FMU43 - PROFIBUS PA or FOUNDATION Fieldbus): max. 0.5 Hz
• 2-wire devices (FMU44): max. 0.3 Hz
• 4-wire devices (FMU40/41/42/43/44): max. 2Hz
The exact values are dependent on the type of device and the parameter settings.
1)
Maximum measuring error
Typical measuring error
2)±0.2 % of the maximum span of the sensor
Include linearity, repeatability and hysteresis
Better than:
Sensor Measuring error
FMU40 ±2 mm (0.08 in) or 0.2 % of measuring distance
FMU41 ±2 mm (0.08 in) or 0.2 % of measuring distance
FMU42 ±4 mm (0.16 in) or 0.2 % of measuring distance
FMU43 ±4 mm (0.16 in) or 0.2 % of measuring distance
FMU44 ±4 mm (0.16 in) or 0.2 % of measuring distance
* whichever is greater
1) according to EN 61298-2
2) with reference operating conditions
*
*
*
*
*
Endress+Hauser 15
Prosonic M
ENDRESS+HAUSER
Prosonic M
ENDRESS+HAUSER
Prosonic M
AB
C
D
1
1
1
2
3
4
Influence of the vapor pressure
Installation variants FMU40, FMU41
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 your Endress+Hauser sales representative.
Installation
A Installation with counter nut
1 Counter nut (PC) supplied for G 1½" and G 2" instruments
B Installation with sleeve
1 Sealing (EPDM) supplied
C Installation with installation bracket
D Installation with screw in flange
1 Sealing (EPDM) supplied
2Nozzle
3Sensor
4Screw in flange
For installation bracket or adapter flange ä 43, "Accessories".
16 Endress+Hauser
A0019052
Prosonic M
AB
-
.
ENDRESS+HAUSER
ProsonicM
1
3
2
A
B
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.
234
1/6D
D
1
5
6
L
r
7
Installation variants FMU42, FMU44
Installation variants FMU43
A Installation with universal flange (Ex-hazardous, e.g. Zone 20)
B Installation with mounting bracket (Non-Ex-hazardous, Zone 20)
A0019280
A Installation with universal slip-on flange (option), (Ex-hazardous, e.g. Zone 20)
1Sensor
2Nozzle
3 Slip-on flange
B Installation with mounting bracket (Non-Ex-hazardous, Zone 20)
Installation conditions for level measurements
• Do not install the sensor in the middle of the tank (3). We recommend leaving a distance between
• Use a protective cover, in order to protect the device from direct sun or rain (2) ä 43, "Weather
the sensor and the tank wall (1) measuring 1/6 of the tank diameter.
protection cover".
A0019053
A0019278
Endress+Hauser 17
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