VEGA PULS61 User Manual
Ope
rating Instructions
VEGAPULS 61
Foundation F
ieldbus
Document ID:
28449
R
adar
Contents
Conten
1 About this document
2 For your safety
3 Product description
4 Mounting
ts
1.1 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Target group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Symbolism used . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Authorised personnel . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Appropriate use . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Warning about misuse . . . . . . . . . . . . . . . . . . . . . . .
2.4 General safety instructions . . . . . . . . . . . . . . . . . . . .
2.5 Safety label on the instrument . . . . . . . . . . . . . . . . . .
2.6 CE conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Fulfillment of NAMUR recommendations . . . . . . . . . .
2.8 FCC/IC conformity (only for USA/Canada) . . . . . . . . .
2.9 Safety instructions for Ex areas . . . . . . . . . . . . . . . . .
2.10 Environmental instructions. . . . . . . . . . . . . . . . . . . . .
3.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Principle of operation . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Packaging, transport and storage . . . . . . . . . . . . . . .
4.1 General instructions . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Mounting preparations, mounting strap. . . . . . . . . . . .
4.3 Mounting instructions . . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
5
5
5
5
6
6
6
6
7
7
8
10
11
11
12
14
15
5 Connecting to power supply
5.1 Preparing the connection . . . . . . . . . . . . . . . . . . . . .
5.2 Connection procedure. . . . . . . . . . . . . . . . . . . . . . . .
5.3 Wiring plan, single chamber housing . . . . . . . . . . . . .
5.4 Wiring plan, double chamber housing . . . . . . . . . . . .
5.5 Wiring plan with double chamber housing Ex d . . . . .
5.6 Wiring plan - version IP 66/IP 68, 1 bar . . . . . . . . . . .
5.7 Switch on phase. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Set up with the indicating and adjustment module P LICSCOM
6.1 Short description . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Insert indicating and adjustment module. . . . . . . . . . .
6.3 Adjustment system . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4 Setup procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 Menu schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 Saving the parameter adjustment data . . . . . . . . . . . .
7 Setup with PACTware and other adjustment programs
7.1 Connecting the PC . . . . . . . . . . . . . . . . . . . . . . . . . .
2 VE
24
25
26
28
30
33
33
34
34
36
37
43
45
46
GAPULS 61 • Foundation Fieldbus
28449-EN-100426
Contents
7.2 Para
meter adjustment with PACTware . . . . . . . . . . . .
7.3 Parameter adjustment with AMS™ . . . . . . . . . . . . . .
7.4 Saving the parameter adjustment data . . . . . . . . . . . .
8 Maintenance and fault rectification
8.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2 Rectify malfunctions . . . . . . . . . . . . . . . . . . . . . . . . .
8.3 Exchanging the electronics module . . . . . . . . . . . . . .
8.4 Software update . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.5 Instrument repair . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Dismounting
9.1 Dismounting steps . . . . . . . . . . . . . . . . . . . . . . . . . .
9.2 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Supplement
10.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.2 Foundation Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . .
10.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47
47
47
48
48
50
51
51
53
53
54
61
66
28449-EN-100426
VEGAPULS 61 • Foun
Supplementary documentation
tion:
Informa
Supplementary documents appropriate to the ordered version come
with the delivery. You can find them listed in chapter "Product
description".
Instructions manuals for accessories and replacement parts
p:
Ti
To ensure reliable setup and operation of your VEGAPULS 61, we
offer accessories and replacement parts. The corresponding documentations are:
l 27835 - Indicating and adjustment module PLICSCOM
l 32628 - Interface adapter VEGACONNECT
l 27720 - External indication VEGADIS 61
l 34296 - Protective cover
l 30176 - Electronics module VEGAPULS series 60
dation Fieldbus 3
1 Abou
t this document
1 Abou
t this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important
instructions for maintenance and fault rectification. Please read this
information before putting the instrument into operation and keep this
manual accessible in the immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained qualified
personnel. The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbolism used
Inform
ation, tip, note
This symbol indicates helpful additional information.
Cauti
on: If this warning is ignored, faults or malfunctions can
result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
applications
Ex
This symbol indicates special instructions for Ex applications.
l List
The dot set in front indicates a list with no implied sequence.
à Action
Th
is arrow indicates a single action.
1 Sequence
Numbers set in front indicate successive steps in a procedure.
4 VE
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
your safety
2 For
or your safety
2 F
2.1 Authorised personnel
All operations described in this operating instructions manual must be
carried out only by trained specialist personnel authorised by the plant
operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
VEGAPULS 61 is a sensor for continuous level measurement.
You can find detailed information on the application range in chapter
"Product description".
Operational reliability is ensured only if the instrument is properly used
according to the specifications in the operating instructions manual as
well as possible supplementary instructions.
For safety and warranty reasons, any invasive work on t he device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbitrary
conversions or modifications are explicitly forbidden.
2.3 Warning about misuse
Inappropriate or incorrect use of the instrument can give rise to
application-specific hazards, e.g. vessel overfill or damage to system
components through incorrect mounting or adjustment.
28449-EN-100426
VEGAPULS 61 • Foun
2.4 General safety instructions
This is a high-tech instrument requiring the strict observance of
standard regulations and guidelines. The user must take note of the
safety instructions in this operating instructions manual, the countryspecific installation standards as well as all prevailing safety
regulations and accident prevention rules.
Depending on the model, the emitting frequencies of all radar sensors
are either in the C or K band range. The low transmitting power lies far
below the internationally permitted limit values. When the instrument is
used correctly, it presents no danger to human health. It may be
operated without restriction outside of closed metallic vessels.
The instrument must only be operated in a technically flawless and
reliable condition. The operator is responsible for trouble-free
operation of the instrument.
dation Fieldbus 5
2 For
your safety
the entire duration of use, the user is obliged to determine the
During
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new
regulations.
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
2.6 CE conformity
This device fulfills the legal requirements of the applicable EC
guidelines. By attaching the CE mark, VEGA provides a confirmation
of successful testing. You can find the CE conformity declaration in the
download area of
www.vega.com.
2.7 Fulfillmen
With respect to compatibility, the NAMUR recommendation NE 53 is
fulfilled. This applies also to the corresponding indicating and
adjustment components. VEGA instruments are generally upward and
downward compatible.
l Sensor software to DTM VEGAPULS 61
l DTM VEGAPULS 61 for adjustment software PACTware
l Indicating and adjustment module for sensor software
The parameter adjustment of the basic sensor functions is independent of the software version. The range of available functions depends
on the respective software version of the individual components.
t of NAMUR recommendations
2.8 FCC/IC conformity (only for USA/Canada)
VEGAPULS sensors with all antenna versions are FCC/IC approved.
Modifications not expressly approved by VEGA will lead to expiry of
the operating licence as per FCC/IC.
VEGAPULS 61 is in conformity with part 15 of the FCC directives and
fulfills the RSS-210 regulations. Note the corresponding regulations for
operation:
l The instrument must not cause any interfering emissions
l The device must be insensitive to interfering immissions, including
those that may cause undesirable operating conditions.
According to chapter "Dimensions" of this operating instructions
manual, the instrument is designed for operation with an antenna with
a max. amplification of 33 dB. The instrument must not be operated
with antennas not listed therein or those having an amplification of
more than 33 dB. The required antenna impedance is 50 Ω.
28449-EN-100426
6 VE
GAPULS 61 • Foundation Fieldbus
2 For
your safety
2.9 Safety
Please note the Ex-specific safety information for installation and
operation in Ex areas. These safety instructions are part of the
operating instructions manual and come with the Ex-approved
instruments.
instructions for Ex areas
2.10 Environmental instructions
Protection of the environment is one of our most important duties. That
is why we have introduced an environment management system with
the goal of continuously improving company environmental protection.
The environment management system is certified according to DIN
EN ISO 14001.
Please help us fulfil this obligation by observing the environmental
instructions in this manual:
l Chapter "Packaging, transport and storage"
l Chapter "Disposal"
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 7
3 Produc
t description
Versions
Scope of delivery
3 Produc
t description
3.1 Configuration
The VEGAPULS 61 radar sensor is available in two electronics
versions:
l Standard electronics type PS60KF
l Electronics with increased sensitivity type PS60KL
The respective version can be determined by means of the type label
on the electronics.
The electronics version influences the CE conformity, the factory
setting for the medium selection and vessel form, the accuracy as well
as the approvals of VEGAPULS 61. The differences are listed in the
respective sections of this operating instructions manual.
The scope of delivery encompasses:
l VEGAPULS 61 radar sensor
l Documentation
- this operating instructions manual
- Operating instructions manual 27835 "Indicating and adjust-
ment module PLICSCOM" (optional)
- Supplementary instructions manual 31708 "Heating for in-
dicating and adjustment module" (optional)
- Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (optional)
- Ex-specific "Safety instructions" (with Ex versions)
- if necessary, further certificates
Components
8 VE
The VEGAPULS 61 consists of the components:
l Process fitting with encapsulated antenna system
l Housing with electronics, optionally available with plug connector,
optionally available with connection cable
l Housing cover, optionally available with indicating and adjustment
module PLICSCOM
The components are available in different versions.
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
3
2
1
3
4
2
1
3 Produc
t description
Fig. 1: VEGAPULS 61 - threaded
plastic housing
1 Housing cover with integrated PLICSCOM (optional)
2 Housing with electronics
3 Process fitting with encapsulated antenna system
Fig. 2: VEGAPULS 61 - threaded
housing
1 Housing cover with integrated PLICSCOM (optional)
2 Housing with electronics
3 Process fitting with plastic horn antenna
version with encapsulated antenna system and
version with plastic horn antenna and plastic
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 9
3 Produc
t description
Application area
Functional principle
Power supply and bus
communication
DD/CFF
3.2 Princi
ple of operation
VEGAPULS 61 is a radar sensor in K-band (emitting frequency
approx. 26 GHz) for continuous level measurement.
The version with encapsulated antenna system is particularly
suitable for level measurement of aggressive liquids in small vessels.
The version with plastic horn antenna is particularly suitable for flow
measurement in open flumes or gauge measurement in bodies of
water.
The electronics with increased sensitivity enables the use of
VEGAPULS 61 also in applications with very poor reflective properties
or products with low ε
value.
r
The antenna of the radar sensor emits short radar pulses with a
duration of approx. 1 ns. These pulses are reflected by the product
and received by the antenna as echoes. The running time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an
appropriate output signal and outputted as measured value.
Power is supplied via the H1 Fieldbus. A two-wire cable according to
Fieldbus specification serves as carrier of both power and digital data
for multiple sensors. This cable can be operated in two versions:
l via an H1 interface card in the control system and additional power
supply
l via a Linking device with HSE (High speed Ethernet) and
additional power supply according to IEC 61158-2
The DD (Device Descriptions) and CFF (capability files) necessary for
planning and configuration of your FF (Foundation Fieldbus) communication network are available in the download area of the VEGA
homepage
www.vega.co
m under "Services - Downloads - Software -
Foundation Fieldbus". The appropriate certificates are also available
there. A CD with the appropriate files and certificates can be ordered
via e-mail under info@de.vega.com or by phone from one of the VEGA
agencies under the order number "DRIVER.S".
The backlight of the indicating and adjustment module is powered by
the sensor. Prerequisite is a certain level of operating voltage.
The data for power supply are specified in chapter "Technical data".
The optional heating requires its own operating voltage. You can find
detailed information in the supplementary instructions manual "Heating
for indicating and adjustment module". This function is generally not
available for approved instruments.
28449-EN-100426
10 VE
GAPULS 61 • Foundation Fieldbus
3 Produc
t description
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
3.3 Operatio
n
VEGAPULS 61 can be adjusted with different adjustment media:
l with indicating and adjustment module
l with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
l a configuration tool
3.4 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
The packaging of standard instruments consists of environmentfriendly, recyclable cardboard. For special versions, PE foam or PE foil
is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or
concealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
l Not in the open
l Dry and dust free
l Not exposed to corrosive media
l Protected against solar radiation
l Avoiding mechanical shock and vibration
l Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
l Relative humidity 20 … 85 %
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 11
4 M
ounting
Mounting position
Screwing in
Moisture
4 Moun
ting
4.1 General instructions
Select an installation position you can easily reach for mounting and
connecting as well as later retrofitting of an indicating and adjustment
module. The housing can be rotated by 330° without the use of any
tools. You can also install the indicating and adjustment module in four
different positions (each displaced by 90°).
War
ning:
With threaded versions, the housing must not be used to screw in the
instrument! Applying tightening forces on the housing can damage its
internal parts.
Use the recommended cables (see chapter "Connecting to power
supply") and tighten the cable gland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cable entry. Rain and condensation water can thus drain off. This
applies mainly to outdoor mounting as well as installation in areas
where high humidity is expected (e.g. through cleaning processes) or
on cooled or heated vessels.
Fig. 3: Measures
Measuring range
12 VE
The reference plane for the measuring range of the sensor depends on
the antenna version.
With encapsulated antenna system, the reference plane is the seal
surface of the thread.
against moisture penetration
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
1 3
4
2
100%
0%
4 M
ounting
Polarisation plane
Fig. 4: Measuring
encapsulated antenna system
1 full
2 empty (max. measuring distance)
3 Measuring range
4 Reference plane
range (operating range) and max. measuring distance with
With the Plastic horn antenna, the reference plane is the contact
surface on the side of the focusing lens. With the version with adapter
flange, the reference plane is the lower side of the flange.
Informa
tion:
If the medium reaches the antenna, buildup can form on it and cause
faulty measurements later on.
The emitted radar pulses of VEGAPULS 61 are electromagnetic
waves. The polarisation plane is the direction of the electrical wave
component. Its position is marked on the instrument.
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 13
1
1
4 M
ounting
Suitability for the process conditions
Fig. 5: Position
antenna system
1 Marking hole
Fig. 6: Position
antenna
1 Marking bars
of the polarisation plane with VEGAPULS 61 with encapsulated
of the polarisation plane with VEGAPULS 61 with plastic horn
Make sure that all parts of the instrument exposed to the process, in
particular the sensor element, process seal and process fitting, are
suitable for the existing process conditions. These include above all
the process pressure, process temperature as well as the chemical
properties of the medium.
You can find the specifications in chapter "Technical data" or on the
type label.
4.2 Mounting preparations, mounting strap
The optionally available mounting strap is used to fasten the radar
14 VE
sensor over open vessels or flumes. It is suitable for mounting on
walls, ceilings or brackets. The strap is supplied unassembled and
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
> 200 mm
(7.87
")
4 M
ounting
Mounting position
must be screwed to the sensor with the three hexagon socket screws
M5 x 10 and
spring washers before setup. Max. torque see chapter
"Technical data". Necessary tools: Allen wrench size 4.
Screwing on is possible in two ways. Depending on the selected
version, the sensors can be swivelled in the strap as follows:
l Single chamber housing
- 180° infinitely variable
- in three steps 0°, 90° and 180°
l Double chamber housing
- 90° infinitely variable
- in two steps 0° and 90°
4.3 Mounting instructions
When mounting the sensor, keep a distance of at least 200 mm
(7.874 in) from the vessel wall. If the sensor is installed in the center of
dished or round vessel tops, multiple echoes can arise. These can,
however, be suppressed by an appropriate adjustment (see chapter
"Setup").
If you cannot keep this distance you should carry out a false echo
storage before setup. This applies mainly if buildup on the vessel wall
is expected. In this case, we recommend repeating a false echo
storage later with existing buildup.
28449-EN-100426
VEGAPULS 61 • Foun
Fig. 7: Mounting
1 Reference plane
2 Vessel center or symmetry axis
on round vessel tops
dation Fieldbus 15
4 M
ounting
vessels with conical bottom it can be advantageous to mount the
In
sensor in the center of the vessel, as measurement is then possible
down to the lowest point of the vessel bottom.
Inflowing medium
Socket
Fig. 8: Vessel
with conical bottom
Do not mount the instruments in or above the filling stream. Make sure
that you detect the product surface, not the inflowing product.
Fig. 9: Inflowing
liquid
The socket piece should be dimensioned in such a way that the
antenna end protrudes at least 10 mm (0.4 in) out of the socket.
28449-EN-100426
16 VE
GAPULS 61 • Foundation Fieldbus
ca. 10 mm
d
h
d
h
1½"
50 mm/2"
80 mm/3"
100 mm/4"
150 mm/6"
200 mm
250 mm
300 mm
500 mm
800 mm
4 M
ounting
Orientation of the sensor
Fig. 10: Recommended
socket mounting
If the reflective properties of the medium are good, you can mount
VEGAPULS 61 on sockets which are higher than the length of the
antenna. You will find recommended values for socket heights in the
following illustration. The socket end should be smooth and burr-free, if
possible also rounded. After installation you must carry out a false
echo storage.
Fig. 11: Deviating
socket dimensions
In liquids, align the sensor as vertical as possible to the product
surface to achieve optimum measuring results.
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 17
4 M
ounting
Vessel installations
Agitators
Fig. 12: Alignment
in liquids
The mounting location of the radar sensor should be a place where no
other equipment or fixtures cross the path of the microwave signals.
Vessel installations such as for example, ladders, limit switches,
heating spirals, struts etc. can cause false echoes that interfere with
the useful echo. Make sure when planning your measuring site that the
radar signals have a "clear view" to the measured product.
In case of existing vessel installations, a false echo storage should be
carried out during setup.
If large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
Small, inclined sheet metal baffles above the installations scatter the
radar signals and prevent direct interfering reflections.
Fig. 13: Cover
smooth profiles with deflectors
If there are agitators in the vessel, a false echo storage should be
carried out with the agitators in motion. This ensures that the interfering
reflections from the agitators are saved with t he blades in different
positions.
18 VE
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
Fig. 14: Agitators
4 M
ounting
Foam generation
Measurement in the
standpipe (surge or bypass tube)
Th
rough the action of filling, stirring and other processes in the vessel,
dense foams which considerably damp the emitted signals may form
on the product surface.
If foams lead to measurement errors, you should use the biggest
possible radar antennas and low frequency radar sensors (C-band).
As an alternative, sensors with guided microwave can be used. These
are unaffected by foam generation and are best suited for such
applications.
By using a standpipe, the influence of vessel installations and
turbulence can be excluded. Under these prerequisites, the measurement of products with low dielectric values (from DK value 1.6) is
possible.
Note:
rement in a standpipe is not recommended for very adhesive
Measu
products.
Surge or bypass tubes must extend all the way down to the requested
min. level, as measurement is only possible within the tube.
Surge pipe
Make sure you provide the necessary upper vent hole in the surge
pipe. The hole must be aligned so that it and the polarisation marking
on the sensor are in the same plane (see illustration: "Pipe antenna
system in a tank").
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 19
max.
min.
2
1
4 M
ounting
Fig. 15: Pipe
in one plane with the polarisation marking on the sensor.
1 Marking of the polarisation direction
2 Vent hole max. ø 5 mm (0.2 in)
antenna system in a tank. The vent hole in the surge pipe must be
If possible, the antenna diameter of the sensor should correspond to
the inner diameter of the tube. With VEGAPULS 61 this is approx.
40 mm (1.575 in). The sensor can be used with tube diameters
between 40 … 80 mm (1.575 … 3.15 in).
Bypass tube
As an alternative to the surge pipe in the vessel, a tube system outside
of the vessel is possible as a bypass tube. Select during setup the
function "Bypass tube".
Align the sensor in such a way that the polarisation marking on the
process fitting is in the same plane as the tube holes or the tube
connection openings (see illustration: "VEGAPULS in a bypass tube").
28449-EN-100426
20 VE
GAPULS 61 • Foundation Fieldbus
100%
0%
1
> 500 mm
4 M
ounting
Flow measurement
Fig. 16: VEGAPULS 61 in
process fitting must be in one plane with the tube holes or the tube connection
openings.
1 Marking of the polarisation direction
a bypass tube. The polarisation marking on the
When the sensor is mounted on a bypass tube, the distance from
VEGAPULS 61 to the upper tube connection should be approx.
500 mm (19.69 in) or more. In case of extremely rough tube inner
walls, you should use an inserted tube (tube in tube) or a radar sensor
with tube antenna.
The short examples are meant to give only introductory information on
the flow measurement. Planning information is available from flume
manufacturers and in special literature.
Meas. wall with rectangular flume
In general, the following points must be observed:
l Install the sensor on the headwater side
l Installation in the centre of the flume and vertical to the liquid
surface
l Distance to the overfall orifice
l Distance of orifice opening above ground
l Min. distance of the orifice opening to bottom water
l Min. distance of the sensor to max. storage level
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 21
h
max
d
min
≥ 2 mm x h
max
90°
4
3 ... 4 h
max
≥ 50 mm
90
°
2 3
1
2
3 ... 4 x h
max
90°
h
max
d
1
B
4 M
ounting
Fig. 17: Flow
sensor; h
measurement with rectangular flume: d = min. distance of the
= max. filling of the rectangular flume
max.
1 Overflow orifice (side view)
2 Headwater
3 Tail water
4 Overfall orifice (view from bottom water)
Khafagi-Venturi flume
In general, the following points must be observed:
l Installation of the sensor at the inlet side
l Installation in the centre of the flume and vertical to the liquid
surface
l Distance to the Venturi flume
l Min. distance of the sensor to max. storage level
22 VE
Fig. 18: Flow
sensor; h
1 Position sensor
2 Venturi flume
measurement with Khafagi-Venturi flume: d = Min. distance to
= max. filling of the flume; B = tightest constriction in the flume
max.
28449-EN-100426
GAPULS 61 • Foundation Fieldbus
4 M
ounting
Gauge measurement
general, the following points must be observed:
In
l Installation of the sensor in a protected area
l Installation vertical to the liquid surface
28449-EN-100426
VEGAPULS 61 • Foun
dation Fieldbus 23
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