Burkert 8041 User manual

Operating Instructions
Bedienungsanleitung
Manuel utilisateur
Type 8041
Insertion electromagnetic flowmeter
Magnetisch-induktives Durchfluss-Messgerät, Insertion
Débitmètre électromagnétique à insertion

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert SAS, 2011 - 2019
Operating Instructions 1904/04_EU-ML 00559777 / Original_FR

3
Type 8041
1. ABOUT THESE OPERATING INSTRUCTIONS .................................5
1.1. Symbols used .......................................................................................5
1.2. Definition of the word "device" ....................................................5
2. INTENDED USE ................................................................................................6
3. BASIC SAFETY INFORMATION ................................................................. 6
4. GENERAL INFORMATION ...........................................................................8
4.1. Manufacturer's address and international contacts .........8
4.2. Warranty conditions ...........................................................................8
4.3. Information on the Internet ............................................................8
5. DESCRIPTION ...................................................................................................8
5.1. Area of application .............................................................................8
5.2. General description ...........................................................................8
5.2.1. Construction ........................................................................... 8
5.2.2. Operating principle ............................................................... 9
5.3. Description of the rating plate .....................................................9
6. TECHNICAL DATA ........................................................................................ 10
6.1. Conditions of use .............................................................................10
6.2. Conformity to standards and directives...............................10
6.2.1. Conformity to the Pressure Equipment Directive ........10
6.2.2. UL-Certification ....................................................................11
6.3. Mechanical data ................................................................................ 11
6.4. Dimensions of device ....................................................................12
6.5. Fluid data ..............................................................................................12
6.6. Electrical data .................................................................................... 14
6.7. Electrical connections data ........................................................ 15
6.8. K-factors ............................................................................................... 15
7. QUICK INSTALLATION .............................................................................. 16
8. INSTALLATION ............................................................................................... 18
8.1. Safety instructions...........................................................................18
8.2. Installation onto the pipe .............................................................18
8.2.1. Recommendations for installing the 8041 on
the pipe ..................................................................................18
8.2.2. Installation into the pipe of a 8041 with a G2'' nut .....21
8.2.3. Installation into the pipe of a 8041 with a clamp
connection ............................................................................22
8.3. Wiring ......................................................................................................22
8.3.1. Wiring the 4...20 mA output .............................................25
8.3.2. Wiring the frequency output .............................................26
8.3.3. Wiring the relay output ......................................................27
9. ADJUSTMENT AND COMMISSIONING ............................................ 29
9.1. Safety instructions...........................................................................29
Contents
English

4
9.2. Description of the electronic board .......................................30
9.3. General diagram of the Read and
Parameterizing modes ..................................................................32
9.4. Selecting the frequency of the main supply ..................... 34
9.5. Filter selection ...................................................................................34
9.6. Selecting the measurement range ......................................... 35
9.7. Calibrating the flow zero point .................................................35
9.8. Calibrating the full scale .............................................................. 38
9.9. Setting the parameters of the relay output ....................... 41
9.9.1. Choosing the switching way of the relay output ..........42
9.9.2. Viewing and setting the low and high switching
thresholds .............................................................................44
9.9.3. Viewing and setting the time delay before switching .47
10. MAINTENANCE AND TROUBLESHOOTING ................................ 50
10.1. Safety instructions...........................................................................50
10.2. Cleaning the device ........................................................................50
10.3. Cleaning the electrodes ............................................................... 50
10.4. Replacing the seal on a device with G2" nut .................... 51
10.5. If you encounter problems ..........................................................51
11. SPARE PARTS AND ACCESSORIES ............................................... 55
12. PACKAGING, TRANSPORT ................................................................... 56
13. STORAGE ....................................................................................................... 56
14. DISPOSAL OF THE DEVICE ................................................................. 56
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Type 8041

5
About these Operating Instructions
1. ABOUT THESE OPERATING
INSTRUCTIONS
The Operating Instructions describe the entire life cycle of the
device. Please keep these Operating Instructions in a safe place,
accessible to all users and any new owners.
The Operating Instructions contains important safety information.
Failure to comply with these instructions can lead to hazardous
situations. Pay attention in particular to the chapters "3. Basic
safety information" and "2. Intended use".
▶Whatever the version of the device, the Operating Instructions
must be read and understood.
▶When the symbol is marked inside or outside the device,
carefully read the Operating Instructions.
1.1. Symbols used
Danger
Warns against an imminent danger.
▶Failure to observe this warning results in death or in serious injury.
Warning
Warns against a potentially dangerous situation.
▶Failure to observe this warning can result in serious injury or
even death.
CaUTiOn
Warns against a possible risk.
▶Failure to observe this warning can result in substantial or minor
injuries.
nOTiCe
Warns against material damage.
indicates additional information, advice or important
recommendations.
refers to information contained in these Operating Instruc-
tions or in other documents.
▶Indicates an instruction to be carried out to avoid a danger, a
warning or a possible risk.
→Indicates a procedure to be carried out.
Indicates the result of a specific instruction.
1.2. Definition of the word "device"
The word "device" used within these Operating Instructions refers to
the flowmeter type 8041.
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Type 8041

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Intended use
2. INTENDED USE
Use of the device that does not comply with the instructions
could present risks to people, nearby installations and the
environment.
The 8041 flowmeter is intended exclusively to measure the flow
rate in liquids.
▶Use this device in compliance with the characteristics and
commissioning and use conditions specified in the contractual
documents and in the Operating Instructions.
▶Never use the flowmeter type 8041 for security applications.
▶Protect this device against electromagnetic interference, ultra-
violet rays and, when installed outdoors, the effects of climatic
conditions.
▶Protect this device against electromagnetic interference, ultra-
violet rays and, when installed outdoors, the effects of climatic
conditions.
▶Only operate a device in perfect working order.
▶Requirements for the safe and proper operation of the device
are proper transport, storage and installation, as well as careful
operation and maintenance.
▶Only use the device as intended.
3. BASIC SAFETY INFORMATION
This safety information does not take into account any contingencies
or occurrences that may arise during installation, use and mainte-
nance of the device.
The operating company is responsible for the respect of the local
safety regulations including staff safety.
Risk of injury due to high pressure in the installation.
▶Stop the circulation of fluid, cut off the pressure and drain the
pipe before loosening the process connections.
Risk of injury due to electrical voltage.
▶If a 18...36 V DC powered version is installed either in a wet environ-
ment or outdoors, all the electrical voltages must be of max. 35 V DC.
▶Shut down the electrical power source of all the conductors and
isolate it before carrying out work on the system.
▶Observe all applicable accident protection and safety regula-
tions for electrical equipment.
Risk of injury due to high fluid temperatures.
▶Use safety gloves to handle the device.
▶Stop the circulation of fluid and drain the pipe before loosening
the process connections.
Risk of injury due to the nature of the fluid.
▶Respect the prevailing regulations on accident prevention and
safety relating to the use of aggressive fluids.
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Type 8041

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Basic safety information
Various dangerous situations
To avoid injury take care:
▶to prevent any unintentional power supply switch-on.
▶to ensure that installation and maintenance work are carried out
by qualified, authorised personnel in possession of the appropri-
ate tools.
▶to guarantee a defined or controlled restarting of the process,
after a power supply interruption.
▶not to use the device for the measurement of gas flow rates.
▶not to use the device in explosive atmospheres.
▶not to use the device in an environment incompatible with the
materials it is made of.
▶not to subject the device to mechanical loads.
▶not to make any modifications to the device.
▶to use the device only if in perfect working order and in compliance
with the instructions provided in these Operating Instructions.
▶to observe the general technical rules when installing and using
the device.
nOTiCe
The device may be damaged by the fluid in contact with.
▶Systematically check the chemical compatibility of the compo-
nent materials of the device and the fluids likely to come into
contact with it (for example: alcohols, strong or concentrated
acids, aldehydes, alkaline compounds, esters, aliphatic com-
pounds, ketones, halogenated aromatics or hydrocarbons,
oxidants and chlorinated agents).
nOTiCe
Elements / Components sensitive to electrostatic discharges
▶This device contains electronic components sensitive to electro-
static discharges. They may be damaged if they are touched by
an electrostatically charged person or object. In the worst case
scenario, these components are instantly destroyed or go out of
order as soon as they are activated.
▶To minimise or even avoid all damage due to an electro-
static discharge, take all the precautions described in the
EN 61340-5-1 norm.
▶
Also ensure that you do not touch any of the live electrical components.
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Type 8041

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General information
4. GENERAL INFORMATION
4.1. Manufacturer's address and
international contacts
To contact the manufacturer of the device, use following address:
Bürkert SAS
Rue du Giessen
BP 21
F-67220 TRIEMBACH-AU-VAL
You may also contact your local Bürkert sales office.
The addresses of our international sales offices are available on the
internet at:
www.burkert.com
4.2. Warranty conditions
The condition governing the legal warranty is the conforming use
of the device in observance of the operating conditions specified in
these Operating Instructions.
4.3. Information on the Internet
You can find the Operating Instructions and technical data sheets
regarding the type 8041 at: www.burkert.com
5. DESCRIPTION
5.1. Area of application
The device is used to measure the flow of neutral or slightly
aggressive fluids with a conductivity of more than 20 µS/cm in
DN06 to DN400 pipes.
5.2. General description
5.2.1. Construction
The device comprises an electronic module and a PVDF or stainless
steel measurement sensor.
The flow sensor comprises two electrodes and a magnetic system.
The connection of the device to the process is made depending on
the version, either by a G2'' nut or a clamp.
Electrical connection is made via two cable glands on a 6-pin ter-
minal block.
The device requires an 18...36 V DC power supply and has:
• a frequency output,
• a relay output,
• a 4...20 mA current output.
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Type 8041

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Description
5.2.2. Operating principle
The magnetic system in the flow sensor generates a magnetic field
in the fluid, perpendicular to the flow direction, see Fig. 1. The elec-
trodes on the flow sensor ensure electrical contact with the fluid.
When the fluid flows over them, a voltage is measured between the
two electrodes. This voltage is proportional to the fluid velocity.
Fig. 1 : Operating principle of the flow sensor
5.3. Description of the rating plate
FLOW: 8041 SST LONG SUPPLY: 18-36V... 220mA
PULSE: 5-36V... 100mA REL: 30V~ or 60V...
I-OUT: 4-20mA IP65 FLUID: PN16; –15/150°C
S/N 1234
00561607 W46MA
Made in France
1
11
6
7
8
1314
35
10
4
2
9
12
1. Measured value and type of
the device
2. Specification of the flow
sensor
3. Specification of the pulse
output
4. Specification of the relay
output
5. Power supply / Max.
consumption
6. Fluid nominal pressure and
fluid temperature range
7. Manufacturing code
8. Conformity marking
9. Warning: Before using the
device, take into account
the technical specifications
described in the Operating
Instructions
10. Certification
11. Protection class of the
device
12. Specification of the current
output
13. Serial number
14. Article number
Fig. 2 : Rating plate of the device (example)
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Type 8041

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Technical data
6. TECHNICAL DATA
6.1. Conditions of use
Ambient temperature –10...+60 °C
Air humidity < 80 %, non condensated
Height above see
level
max. 2000 m
Operating conditions Continuous
Equipment mobility Fixed
Use Indoor and outdoor
(Protect the device against electromag-
netic interference, ultraviolet rays and,
when installed outdoors, against the
effects of climatic conditions)
Installation category Category I according to UL/EN 61010-1
Degree of pollution Degree 2 according to UL/EN 61010-1
Protection class
according to
IEC / EN 60529
IP65 1), with cable connected and cable
gland tightened and cover screwed on
to the electronic module
1) not evaluated by UL
6.2. Conformity to standards and
directives
The applied standards, which verify conformity with the EU Direc-
tives, can be found on the EU Type Examination certificate and/or
the EU Declaration of Conformity (if applicable).
6.2.1. Conformity to the Pressure
Equipment Directive
→Make sure the device materials are compatible with the fluid.
→Make sure the pipe DN is adapted for the device.
The device conforms to Article 4, Paragraph 1 of the Pressure
Equipment Directive 2014/68/EU under the following conditions:
• Device used on a pipe (PS = maximum admissible pressure;
DN = nominal diameter of the pipe)
Type of fluid Conditions
Fluid group 1, Article 4, Paragraph 1.c.i DN≤25
Fluid group 2, Article 4, Paragraph 1.c.i DN≤32
or PSxDN≤1000
Fluid group 1, Article 4, Paragraph 1.c.ii DN≤25
or PSxDN≤2000
Fluid group 2, Article 4, Paragraph 1.c.ii
DN≤200
or PS≤10
or PSxDN≤5000
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Type 8041

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Technical data
6.2.2. UL-Certification
The devices with variable key PU01 or PU02 are UL-certified
products and comply also with the following standards:
• UL 61010-1
• CAN/CSA-C22.2 n°61010-1
Identification
on the device
Certification Variable key
UL recognized PU01
Measuring
Equipment
EXXXXXX
®
UL listed PU02
6.3. Mechanical data
Table 1 : Wetted parts
Part Material
Holder of the flow sensor PVDF or stainless steel
1.4404 / 316L
Electrodes Stainless steel
1.4404 / 316L
Clamp (only clamp version) Stainless steel
1.4404 / 316L
Earthing ring
(only if flow sensor holder in PVDF)
Stainless steel
1.4404 / 316L
Holder of the electrodes (only if flow
sensor holder in stainless steel) PEEK
Part Material
Seal of the flow sensor
(version with G2" nut) FKM (FDA approved)
Table 2 : Parts not in contact with the fluid
Part Material
Housing, cover, nut
• holder of the flow sensor in
stainless steel
• holder of the flow sensor in
PVDF
• PPA, glass fiber reinforced
• PC, glass fiber reinforced
Screws of the cover Stainless steel
Cable gland PA
Seal of the cover EPDM
Seal of the cable gland Neoprene
Holder of the
flow sensor
Electrodes holder Electrodes
Earthing ring
Fig. 3 : Parts of the flow sensor holder in stainless steel (left) or in
PVDF (right), devices with a G2'' nut
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Type 8041

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Technical data
Clamp
Holder of the flow sensor
Electrodes holder
Electrodes
Fig. 4 : Parts of the flow sensor in stainless steel with a clamp connection
6.4. Dimensions of device
→please refer to the technical data sheets regarding the type
8041 avalaible at: www.burkert.com
6.5. Fluid data
Fluid conductivity > 20 µS/cm
Fluid viscosity < 1000 mPa.s
Fluid temperature The fluid temperature may be
restricted by the fluid pressure and
the material of the S020 fitting used
(see Fig. 5 and Fig. 6)
• with holder of the flow
sensor in stainless steel
• –15...+150 °C
• with holder of the flow
sensor in PVDF
• 0...+80 °C
Fluid pressure The fluid pressure may be restricted
by the fluid temperature, the material
of the S020 fitting used and the DN
of the S020 fitting used
(see Fig. 5 and Fig. 6).
• with holder of the flow
sensor in stainless steel
• PN10 1) with a fitting in plastic,
PN16 1) with a fitting in metal
• with holder of the flow
sensor in PVDF
• PN10 1)
Flow rate measurement
• Measuring range • 0.2...10 m/s 2)
• Linearity • ±0.5 % of the full scale (10 m/s)
• Repeatability • ±0.25 % of the measured value 2)
• Measurement deviation
- with standard K-factor - ±3.5 % of the measured value 2)
- with Teach-in - ±0.5 % of the measured value (at
the value of the teach-in flow rate) 2)
1) not evaluated by UL
2) Determined in the following reference conditions: fluid = water, water
and ambiant temperatures = 20 °C, upstream and downstream distances
respected, appropriate pipe dimensions
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Type 8041

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Technical data
+10 +30 +50 +70
0
2
1
3
4
5
6
7
8
9
10
P [bar]
T [°C]
PVDF (PN10) / Metal
PVC + PP
PVC (PN10)
PP (PN10)
Fig. 5 : Fluid pressure-temperature dependency of the 8041 with a
flow sensor holder in PVDF, inserted into an S020 fitting in
metal, PVDF, PVC or PP
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0-20 0 +20 +40 +60 +80 +100 +120
PVDF (PN10)
PVC (PN10)
PP (PN10)
T (°C)
P (bar)
PVC + PP
PVDF
+150
DN100 for measuring
devices with a clamp con-
nection (PN10)
Metal
(PN16) 1)
1) Except DN100 for measuring devices with a clamp connection
Fig. 6 : Fluid pressure-temperature dependency of the 8041 with a
flow sensor holder in stainless steel, inserted into an S020
fitting in metal, PVDF, PVC or PP
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Type 8041

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Technical data
6.6. Electrical data
Operating voltage • 18...36 V DC,
• filtered and regulated
• oscillation rate: ±5 %
• Connection to main supply: per-
manent (through external SELV and
through LPS power supply)
Specifications of the
power source (not
supplied)
• Limited power source according to
UL / EN 60950-1 standards
• or limited energy circuit according to
UL / EN 61010-1, Paragraph 9.4
Current consumption • 220 mA (at 18 V DC)
Current output
• Type of output • 4...20 mA, sinking or sourcing wiring
• Accuracy • ± 1 % (0.16 mA)
• Refresh time • 100 ms
• Max. loop impedance • 1100 W at 36 V DC,
330 W at 18 V DC
Frequency output
• Frequency • 0...240 Hz
• Duty cycle • 50 % ± 1 %
• Max current • 100 mA max.
• Protected against
short-circuits and
polarity reversal
• yes
Relay output To use the relay outputs in a wet
location, observe the following
DANGER safety instruction.
• non UL version • Normally open or normally closed,
depending on the wiring
• 250 V AC max / 3 A or
40 V DC / 2 A (resistive load)
• UL version • max. 30 V AC and 42 V peak / 3 A
or 60 V DC / 1 A max.
Alarme
• Full scale exceeded • 22 mA and 256 Hz
• Error signal • 22 mA and 0 Hz
Danger
Danger due to the operation of the relay outputs of a UL
device in a wet location.
▶If a UL device is used in a wet location:
-energize the relay outputs with an alternating voltage of max.
16 Vrms and 22.6 Vpeak.
-or energize the relay outputs with a direct voltage of
max. 35 V DC.
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Type 8041

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Technical data
6.7. Electrical connections data
Type of connection Through two M20x1,5 cable glands
▶Cable type
▶Cross section
▶Diameter of each cable:
- if only one cable is
used per cable gland
- if two cables are used
per cable gland
▶shielded
▶0.5...1.5 mm2
- 6...12 mm
- 4 mm, with the supplied multi-
way seal
6.8. K-factors
The S020 fitting with weld end connections is available
in two versions: a version for the measuring devices with
a G2'' nut and a version for the measuring devices with a
clamp connection.
▶
Use the K-factor of the fitting used.
The device measures the flow velocity (in m/s) of the fluid and con-
verts it into a current (in mA) and a frequency rating (in Hz).
The current I or the frequency f are proportional to the flow rate
Q (l/s), the proportionality factor is called the "K-factor":
f = K1*Q
I = K2*Q + 4
with K1 and K2 in pulse/litre
The following formulae are used to calculate the K1 and K2 factors
needed to convert the current or frequency into a flow rate:
Full scale K-factor K1K-factor K2
10 m/s K1 = 100
K
fitting
K2 = 20
3*Kfitting
5 m/s K1 = 200
K
fitting
K2 = 40
3*Kfitting
2 m/s K1 = 500
K
fitting
K2 = 100
3*Kfitting
where Kfitting = K-factor of the S020 fitting used
Example:
If the full scale of the device is set to 5 m/s, the value of the current
output will be:
I = 40 Q + 4
3*Kfitting
with I in mA, Kfitting in pulse/litre and Q in l/s.
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Type 8041

16
Quick installation
→Select the measuring range with
switches 4 and 5, see chap. 9.6.
→Thread the cables through the
cable glands and make the con-
nections to the electronic board,
see chap. 8.3.
→Connect the shield on the
power cable to the earth, see
chap. 8.3.
→Fill the pipe.
→Energize the device.
→Calibrate the flow zero point, see
chap. 9.7.
→Install the device on the pipe.
7. QUICK INSTALLATION
Contact your Bürkert
agent
→Unpack the device.
Article number
correct?
Loosen 4 screws and remove cover.
yes
No
→Select the frequency of the
main supply with switch 1, see
chap. 9.4.
→Select the filter with switches 2
and 3, see chap. 9.5.
→Select the current output type,
see chap. 8.3.1.
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Type 8041

17
Quick installation
Calibrate the full scale of
the installation?
→Calibrate the full scale, see
chap. 9.8.
→Make
sure the fluid
velocity > 2 m/s and
< 10 m/s.
No
yes
→Set the relay output parameters,
see chap. 9.9.
yes
No
The 10 bargraph LEDs
go ON?
Green LED flashes once?
→Put the cover on the device as
described in Fig. 16, chap. 8.3.
→Tighten the 4 screws of the
cover in an alternating pattern.
The device is ready for use.
No, see chap. 10.5
yes
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Type 8041

18
Installation
8. INSTALLATION
8.1. Safety instructions
Danger
Risk of injury due to high pressure in the installation.
▶Stop the circulation of fluid, cut off the pressure and drain the
pipe before loosening the process connections.
Risk of injury due to high fluid temperatures.
▶Use safety gloves to handle the device.
▶Stop the circulation of fluid and drain the pipe before loosening
the process connections.
Risk of injury due to the nature of the fluid.
▶Respect the prevailing regulations on accident prevention and
safety relating to the use of aggressive fluids.
Risk of injury due to electrical voltage.
▶If a 18...36 V DC powered version is installed either in a wet
environment or outdoors, all the electrical voltages must be of
max. 35 V DC.
▶Shut down the electrical power source of all the conductors and
isolate it before carrying out work on the system.
▶Observe all applicable accident protection and safety regula-
tions for electrical equipment.
Warning
Risk of injury due to non-conforming installation.
▶The electrical and fluid installation can only be carried out by
qualified and skilled staff with the appropriate tools.
▶Install appropriate safety devices (correctly rated fuse and/or
circuit-breaker).
Risk of injury due to unintentional switch on of power supply
or uncontrolled restarting of the installation.
▶Take appropriate measures to avoid unintentional activation of
the installation.
▶Guarantee a set or controlled restarting of the process subse-
quent to any intervention on the device.
Warning
Risk of injury if the fluid temperature/pressure dependency is
not respected.
▶Observe the fluid temperature/pressure dependency according to
the nature of the material of the fitting used (see Fig. 5 and Fig. 6).
8.2. Installation onto the pipe
8.2.1. Recommendations for installing the
8041 on the pipe
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Type 8041

19
Installation
→Choose a fitting appropriate to the velocity of the fluid inside the pipe; refer to the graphs below:
Example: - Specification: if the nominal flow rate is 10 m3/h, the ideal flow velocity is between
2 and 3 m/s - Solution: intersection between flow rate and flow velocity in the graph gives the appropriate pipe diameter, DN40 (or DN50 for the asterisked fittings).
* For the fittings: -with external thread connections acc. to SMS 1145; -with weld end connections acc. to SMS 3008, BS 4825-1/ASME BPE/ DIN 11866 series C or DIN 11850 series 2/DIN 11866 series A/ DIN EN 10357 series A; -with Clamp connections acc. to SMS 3017, BS 4825-3/ASME BPE or DIN 32676 series A.
0.1 0.3 0.5 1 3 5
10
0.01 0.02 0.05
0.1 0.2 0.5
1
2 5
10 20 50
100 200
m
3
/h
0.2 0.5
1
2
5
10 20 50
100 200 500
1000 2000 3000
l/min
0.3 0.5 1 3 5 10
30
m/s
fps
US gpm
0.05
0.1 0.2 0.5
1 2 5
10 20 50
100 200
500
1000
DN 65 DN 50 (DN65)* DN 40 (DN50)* DN 32 (DN40)* DN 25 (DN32)* DN 20 (DN25)* DN 15 (DN15 ou DN20)*
500
1000 2000
2000 5000
10000
5000
20000
5000
10000 20000
30000
50000
100000
DN 400 DN 350 DN 300 DN 250 DN 200 DN 150 DN 125 DN 100 DN 80 DN 6 DN 8
Example DN400 DN350 DN300 DN250 DN200 DN150 DN125 DN100 DN80 (DN100)* DN65 (DN80)* DN50 (DN65)* DN40 (DN50)* DN32 (DN40)* DN25 (DN32)* DN20 (DN25)* DN15 (DN15 or DN20)* DN8 DN6
m/s fps
Fluid velocity
flow rate
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Type 8041

20
Installation
→Install the device on the pipe to have the upstream and down-
stream distances respected according to the design of the
pipes, refer to standard EN ISO 5167-1 and Fig. 7:
50 x DN 5 x DN 40 x DN 5 x DN
25 x DN 5 x DN 20 x DN
5 x DN
18 x DN 5 x DN 15 x DN 5 x DN
With control valve Pipe with 2 elbows at 90° in
3 dimensions
Pipe with 2 elbows at 90° Pipe with 1 elbow at 90° or
1 T-piece
With pipe expansion With pipe reduction
Fig. 7 : Upstream and downstream distances depending on the
design of the pipes.
→Respect the following additional mounting conditions to ensure
that the measuring device operates correctly:
- We recommend to install the device at a 45° angle to the hori-
zontal centre of the pipe to prevent deposits on the electrodes
and false measurements due to air bubbles (see Fig. 8);
45°
45°
Fig. 8 : Mounting angle on the pipe
- Ensure that the pipe is always filled in the section around the
device (see Fig. 9).
- When mounting vertically ensure that the flow direction is in an
upward direction (see Fig. 9).
- Prevent the formation of air bubbles in the pipe in the section
around the device (see Fig. 10).
- Always mount the device upstream a possible injection point
in the pipe of a high-conductivity fluid (for example: acid, base,
saline,...).
English
Type 8041