MIB Flowmax 242i User manual

Flowmax

242i
Ultrasonic flow
metering / dosing
device
Operating manual
BA 010E/FM242i/08.22
Valid starting from
Hardware V 2.1
Software V 1.29

eneral safety instructions Flowmax

242i
2 M I B
General safety instructions
Please always observe the following safety instructions!
Please pay attention to the safety instructions with the following pictograms and
signal words in these operating instructions:
IMPORTANT! indicates situations or cases
which, if not avoided, could result in damage
or failure of the Flowmax 242i equipment.
WARNIN ! indicates general hazardous
situations or cases which, if not avoided,
could result in serious injury or death.
NOTICE! is used to lead users to helpful
information not related to personal injury.
Intended use
 The flow meter Flowmax 242i may only be used for measuring the flow of
pure, homogeneous liquids.
 The volume flow meter Flowmax 242i is built operationally safe in
accordance with the latest state of the art technologized developments and
industry standard EN 61010 regulations (corresponds to VDE 0411 “Safety
specifications for electrical measurement, control and laboratory devices”).
 The manufacturer is not liable for any injury, damage or harm due to
inappropriate or unintended use or modifications of the flow meter.
Conversions and/or changes to the flow meter may only be made, if they are
expressly performed in accordance with the operating instructions in this
operating manual.
Personnel for installation, commissioning and operation
 ssembly, electrical installation, commissioning and maintenance of
the flow meter must be carried out by qualified, trained personnel. The
qualified personnel must have read and understood the operating
instructions in this operating manual and must follow the operating
instructions in this manual.
 The installer has to ensure that the flow meter is correctly connected
according to the electrical connection diagrams in this operating
manual.
 Serious injury or death from electric shock may occur if wiring,
installation, disassembly or remove of wires is performed while
electrical power is energized
Technological progress
The manufacturer reserves the right to revise, alter, or modify the flow meter to
the most current technology without special prior notice. Further information
about the latest updates and potential additions to these operating instructions
are available from the manufacturer.
IMPORT NT!
W RNING!
NOTICE!
W RNING!

Flowmax

242i Tablet of contents
M I B 3
Tablet of contents
General safety instructions .......................................................................................................... 2
Tablet of contents ......................................................................................................................... 3
Table of figures ............................................................................................................................. 5
1. Planning information ............................................................................................................. 6
1.1 Areas of application .............................................................................................................................. 6
1.2 Measuring principle .............................................................................................................................. 6
1.3 Operational safety ................................................................................................................................ 7
2. ssembly and installation..................................................................................................... 7
2.1 Installation instructions ......................................................................................................................... 7
2.2 Assembly of the flow meter .................................................................................................................. 8
2.3 Electrical wiring .................................................................................................................................. 10
3. Commissioning .................................................................................................................... 12
3.1 Operation ............................................................................................................................................ 12
3.1.1 Display and user menu ................................................................................................................... 13
3.2 Functionalities of flow meter and default settings .............................................................................. 16
3.2.1 Language ........................................................................................................................................ 16
3.2.2 Dosing ............................................................................................................................................. 16
3.2.3 Media............................................................................................................................................... 17
3.2.3.1 Set Offset ................................................................................................................................................. 17
3.2.3.2 1-Pt-Correction ......................................................................................................................................... 17
3.2.3.3 Creeping suppression .............................................................................................................................. 17
3.2.3.4 Basic Trim ................................................................................................................................................ 18
3.2.4 eneral Settings ............................................................................................................................. 19
3.2.4.1 Reset Counter .......................................................................................................................................... 19
3.2.4.2 Empty pipe delay ...................................................................................................................................... 19
3.2.4.3 Hysteresis................................................................................................................................................. 19
3.2.4.4 Lower Limit ............................................................................................................................................... 20
3.2.4.5 Upper Limit ............................................................................................................................................... 20
3.2.4.6 Pulse value ............................................................................................................................................... 20
3.2.4.7 Total Counter............................................................................................................................................ 21
3.2.4.8 Counter .................................................................................................................................................... 21
3.2.5 Display ............................................................................................................................................ 22
3.2.5.1 Units ......................................................................................................................................................... 22
3.2.5.2 Filter for Display ....................................................................................................................................... 22
3.2.5.3 Rotate Display .......................................................................................................................................... 22
3.2.5.4 Flashing .................................................................................................................................................... 22
3.2.6 Analog Output QA ........................................................................................................................... 23
3.2.6.1 Function ................................................................................................................................................... 23
3.2.6.2 Filter ......................................................................................................................................................... 25
3.2.6.3 Output Value ............................................................................................................................................ 25
3.2.7 Digital Outputs Q1 and Q2 (Q2 only available with 8-pin plug) ...................................................... 26
3.2.8 Digital Input I1 (only available with 8-pin plug) ............................................................................... 28
3.2.9 Diagnostic ....................................................................................................................................... 28

Tablet of contents Flowmax

242i
4 M I B
3.2.9.1 Testing Flow ............................................................................................................................................. 29
3.3 Overview of default settings ............................................................................................................... 29
3.4 eneral Information ............................................................................................................................ 29
4. Exchange of flow meter ...................................................................................................... 30
5. Technical specifications ..................................................................................................... 31
5.1 Dimensions and weight ...................................................................................................................... 31
5.2 Technical specifications ..................................................................................................................... 32
5.3 Possible error text Flowmax 242i ....................................................................................................... 33
6. ccessories ......................................................................................................................... 33
7. Shipment .............................................................................................................................. 33
ppendix ..................................................................................................................................... 34

Flowmax

242i Table of figures
M I B 5
Table of figures
Figure 1: Presentation of the principle of ultrasonic flow measuring ................................................ 6
Figure 2: Installation position of Flowmax 242i................................................................................ 7
Figure 3: Mounting examples for Flowmax 242i .............................................................................. 8
Figure 4: Mounting possibilities ....................................................................................................... 9
Figure 5: Fixing Flowmax 242i ........................................................................................................ 9
Figure 6: Pin code: Connection plug / socket for 5-pin version ..................................... 10
Figure 7: Pin code: Connection plug / socket for 8-pin version ..................................... 11
Figure 8: Operating with the key pad ............................................................................................ 13
Figure 9: Menu structure ............................................................................................................... 15
Figure 10: Function of the creeping suppression illustrated with 0.6 l/min ..................................... 17
Figure 11: Function Lag Creeping Flow ........................................................................................ 18
Figure 12: Function Hysteresis at limit .......................................................................................... 20
Figure 13: The current output is active .......................................................................................... 23
Figure 14: Characteristic curve 0 … 20mA ................................................................................... 24
Figure 15: Characteristic curve 4 … 20mA ................................................................................... 24
Figure 16: Function Filter of analog output .................................................................................... 25
Figure 17: Connecting digital output to relay ................................................................................. 27
Figure 18: Connecting digital output to counter ............................................................................. 28

Planning information Flowmax

242i
6 M I B
1. Planning information
1.1 reas of application
The flow measurement device in the Flowmax 242i designed to measure dynamic
flow in pipes and tubes. This flow meter is suitable for liquids only. The Flowmax
242i is used in
 Bio-processing applications
 Chemicals supply for controlling, logistics, monitoring
 Cooling systems, logistics, monitoring
 Process equipment for control and monitoring of formulas
 Valve control for continuous release of liquid volumes
 Supply with de-ionized water
 Very dynamic liquid processes with dosing times of below 1 second
Flowmax 242i has the following features and benefits:
 No movable parts, therefore no wear
 High repeatability
 Easy to clean
 Safe operation
 Compact design
 Integrated detection of empty conduits
 Integrated dosing function with pre-set and adjustable amounts
 Chemical resistant
 Constant pipe cross-section over the entire measurement channel
1.2 Measuring principle
It usually takes more energy to swim against the flow than with the flow. The
ultrasonic flow measurement is based on the phase-difference approach:
Two ultrasonic-sensors located opposite from each other alternatively
transmitting and receiving ultrasonic signals. If there is no liquid flow both sensors
receive the transmitted ultrasonic signals in the same phase, i.e. without phase
difference. If liquid is flowing there is a phase shift. It differs when measured in
direction of the flow than when measured against the direction of the flow. This
phase difference is directly proportional to the flow rate.
Figure 1: Presentation of the principle of ultrasonic flow measuring

Flowmax

242i Assembly and installation
M I B 7
1.3 Operational safety
Comprehensive self-tests ensure highest possible safety.
Faults (process or system errors) are output on a digital output or displayed on
the display menu.
The protection class is IP 65.
Flowmax 242i meets the general EMC immunity requirements according to CE,
EN 61000-6-3, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN
61000-4-6.
Flowmax 242i meets the safety requirements concerning the Protective Extra
Low Voltage directive according to EN 50178, SELV, PELV.
Flowmax 242iM has the USP Class VI approval and is resistant to gamma
irradiation.
2. ssembly and installation
2.1 Installation instructions
The housing of the Flowmax 242i has an arrow, symbolizing the flow direction of
measurement. The flow meter has to be installed in a way so that the flow-through
is in the same direction as the arrow symbol.
Figure 2: Installation position of Flowmax 242i
For fastest possible bubble detection it is important to keep the pipe distance from
tank to Flowmax 242i as short as possible. Accurate measurement can only be
assured, if the pipe is completely filled and the liquid does not outgas.
Notwithstanding it may be advantageous for dosing applications to install the
Flowmax 242i as close as possible to the dosing valve, since soft pipes increases
the cross-section depending on the system pressure. This may lead to repeatable
differences.
Insure that no cavitations dissolve from the measured liquid. Depending on the
measured liquid it can be helpful to have enough back pressure on the outlet of
Flowmax 242i to avoid cavitations. Insure all mechanical connections are tight.
Particles present in the flow stream may result in measuring errors.
NOTICE!

Assembly and installation Flowmax

242i
8 M I B
When using pumps, Flowmax 242i must be installed in flow direction on the
pressure side, on order to ensure sufficient pressure. The maximum pressure
rating of Flowmax 242i has to be considered.
Do not exceed the maximum pressure allowance for of the Flowmax 242i
(see section 5.2 Technical specifications). Exceed the maximum pressure
can lead to destruction of the Flowmax 242i.
Flowmax 242i needs no inlet or outlet.
2.2 ssembly of the flow meter
The flow meter is mounted into a pipe system by using the mechanical
connection. Flowmax 242i should be mounted vertically into the pipe for the best
measuring performance. Do not install the flow meter after a dosing valve where
the flow meter can run empty. Placing the flow meter after a dosing valve and
allowing it to run empty will cause a measuring deviation at the next
measurement. To avoid bubbles in the liquid, Flowmax 242i should be installed
on the pressure side of the pump.
Figure 3: Mounting examples for Flowmax 242i
Flowmax
Flowmax
Pump
Valve
Container
Valve
W RNING!
NOTICE!

Flowmax

242i Assembly and installation
M I B 9
If it is not possible to mount the flow meter vertically, then mount the instrument
in a location where the pipe will be filled at all times. The best measuring result is
achieved if bubbles do not pass through Flowmax 242i.
Figure 4: Mounting possibilities
For applications with a “clean design“ for which it is necessary to completely drain
the pipe system, we recommend mounting the flow meter in the vertical position.
Residual liquid may remain inside the device if flow meter is mounted horizontally.
Vibrations or mechanical forces may decrease measuring accuracy. So if there
is due to vibration or mechanical movements it is necessary to fix Flowmax 242i
additionally, the instrument can be fixed on the lateral slot.
Figure 5: Fixing Flowmax 242i
Flowmax 242i must be installed without mechanical tensions on the existing pipe
system. The flow meter may be damaged if there is tension on the existing pipe
system.
Non-compliance of the installation instructions may result in tearing of the
housing, liquid may leak out.
Flowmax
Flowma
Process
Process
Valve
Valve
W RNING!

Assembly and installation Flowmax

242i
10 M I B
2.3 Electrical wiring
Serious injury or death from electric shock may occur if wiring, installation,
disassembly or remove of wires is performed while electrical power is
energized.
lways shut off or disconnect electrical power at service panel and lock
switch or breaker and tag to prevent energizing electrical power during
work or while Flowmax 242i is not assembled and installed.
The electrical connection between the electronics and the measuring pipe
can be disconnected under voltage. However, the manufacturer
recommends disconnecting the power supply to the Flowmax 242i first.
Wiring installation, disassembly and removal must be performed by
qualified persons experienced and knowledgeable about electrical work.
Figure 6: Pin code: Connection plug / socket for 5-pin version
Connector cable pin configuration defined by manufacturer.
The outputs may be re-programmed for specific applications.
5-pin plug with 1-wire communication:
Pin
Function
Description
1 L+ Voltage supply: 18 ... 30 VDC
2 Pulse / Frequency output Q1
alternative:
1. Empty-pipe output
2. Dosing output
3. Upper or Lower Limit-
output
4. Negative flow
Digital Output Q1
Freely adjustable ranging from 0.1 to 3000 ml/pulse
in 0.1 ml/pulse steps, npn-or pnp-transistor, max.
load 100mA.
Configurable output of 0V or 24V when pipe is empty.
Configurable output of 0V or 24V
Configurable output of 0V or 24V when reaching
upper or lower limit
Configurable output of 0V or 24V when liquid flows in
negative direction
3 ND round: 0 V
4 Communication Communication interface A
5 Analog output QA 4 ... 20mA; 0 ... 20mA
Example: 0l/min => 4mA
36l/min => 20mA (depending on diameter)
Empty pipe Alert => 3.5mA
W RNING!

Flowmax

242i Assembly and installation
M I B 11
8-pin plug with 1-wire communication:
Figure 7: Pin code: Connection plug / socket for 8-pin version
Connector cable pin configuration defined by manufacturer.
The outlets may be re-programmed for specific applications.
*it applies: for Q1 + Q2 ≤ 100mA
Pin
Function
Description
1 24 VDC Voltage supply: 18 ... 30 VDC
2 Digital output Q1
Functions
1. Pulse / Frequency output
2. Empty pipe output
3. Dosing output
4. Upper or Lower Limit
output
5. Negative flow
Digital output Q1
Configurable npn-or pnp transistor, max. load
100mA*.
Max. voltage must be less than the supply voltage
Freely adjustable ranging from 0.1 to 3000 ml/pulse
in 0.1 ml/pulse steps,
Configurable output of 0V or 24V when pipe is empty.
Configurable output of 0V or 24V
Configurable output of 0V or 24V when reaching
upper or lower limit
Configurable output of 0V or 24V when liquid flows
in negative direction.
3 ND round: 0 V
4 Digital output Q2
Functions:
1. Empty pipe output
2. Dosing output
3. Pulse /Frequency output
4. Upper or Lower Limit
output
5. Negative flow
Digital output Q2
Configurable npn- or pnp-transistor, max. load
100mA*.
Max. voltage must be less than the supply voltage
Configurable output of 0V or 24V when pipe is empty.
Configurable output of 0V or 24V
Freely adjustable ranging from 0.1 to 3000 ml/pulse
in 0.1 ml/pulse steps.
Configurable output of 0V or 24V when flow reaches
upper or lower limit.
Configurable output of 0V or 24V when liquid flows
in negative direction.
5 Analog output QA 4 ... 20mA; 0 ... 20mA
Example: 0l/min => 4mA
6l/min => 20mA (depending on diameter)
Empty pipe Alert => 3.5mA
6 Communication Communication interface
7 Digital input I1
1. Dosing output
2. Set offset
3. Reset counter
4. Creeping flow off
Digital input I1
Starts the dosage by a rising edge of 24V.
The Offset is set by a rising edge of 24V.
Reset of the counter by a rising edge of 24V.
Creeping suppression is deactivated as long as there
are 24V at the input.
8 Shielding EMC safety

Commissioning Flowmax

242i
12 M I B
ttention: Only operate the flow meter Flowmax 242i within the operating
limits stipulated on the product label and the operating manual / data sheet.
Use of the Flowmax 242i outside these conditions will lead to overloads
which cause permanent damage.
3. Commissioning
NOTE: If Flowmax 242i is used for a fluid other than water the "basic trim" has to
be carried out during commissioning. Therefore the device has absolutely be filled
with medium.
The basic trim can be done on the device display. During the adjustment the
medium may not flow as it affects the function .
3.1 Operation
If Flowmax 242i is used as a volume flow meter for water or water-like liquids it
will not require on-site calibration. Parameters for water are calibrated at the
factory. The Flowmax 242i may also be ordered with customized settings, but
customized settings must be requested when Flowmax 242i is ordered.
NOTE: If necessary, e.g. if viscosity and/or speed of sound deviate significantly
from water, the pre-set parameters can be adjusted via the display or FlowCon
200i.
The following parameters may be changed to settings suitable for the individual
conditions: for 5-pin version
- Digital output Q1, function and behavior
- Analog output QA, function and behavior
- Flow range, for which shall apply 4 ... 20mA resp. 0 … 20mA
- Pulse value
- Creeping suppression
- Optimization of measurement curve with up to 8 interpolation values
(medium matrix)
The following parameters may be changed to settings suitable for the individual
conditions: for 8-pin version
- Digital output Q1, function and behavior
- Digital output Q2, function and behavior
- Digital input I1, function and behavior
- Analog output QA, function and behavior
- Flow range, for which shall apply 4 ... 20mA resp. 0 … 20mA
- Pulse value
- Creeping suppression
- Optimization of measurement curve with up to 8 interpolation values
(medium matrix)
IMPORT NT!
NOTICE!

Flowmax

242i Commissioning
M I B 13
3.1.1 Display and user menu
Flowmax 242i is equipped with a display to visualize actual measurement values
and to change parameters of the flow meter. Menu navigation and parameter
changes are controlled by the four keys on the keypad.
Figure 8: Operating with the key pad
Press the “Set” key to display the main menu. Different menu options can be
selected by using the two arrow keys.
To enter e.g. analog limits “Analog output – Upper limit” use the arrow keys to
change values and press “Set” to confirm. To switch back to the last menu level
press the “Esc” key. As soon as the operator tries to change values the user will
be prompted to enter a password. Password protection is used to ensure changes
to values or configurations are done by authorized personnel. The default
password for Flowmax 242i is 41414. The user level will remain active for 30
minutes after the last press on any button. 200 seconds after the last key press,
the device skips the menu and returns to the display mode, which does not apply
to the menu items diagnostic and dosing. Here, the unit remains in the submenu
until the operator exits the submenu again with the ESC key.
Operating examples see appendix.
NOTE:
Always the actual set-activated menu parameters are shown in the display. The
activated parameter is displayed inverted.
NOTE:
In the menu all the possible functions of the instrument are visible.
The functions of Digital Output Q2 and Digital Input I1 are only available on the
Flowmax version with 8-pin plug.
In the menu Analog Output there are displayed the output value functions PID -
Controller and Speed of Sound. They are provided only with functionality, if they
were considered in the order (optional).
Flowmax 242i without display has the same features as the display version, but
you can change parameters only via the display or programming unit FlowCon
200i.
NOTICE!
NOTICE!

Commissioning Flowmax

242i
14 M I B

Flowmax

242i Commissioning
M I B 15
Figure 9: Menu structure

Commissioning Flowmax

242i
16 M I B
3.2 Functionalities of flow meter and default settings
3.2.1 Language
The language of the display can be changed. Available languages are English
Spanish, French and erman.
3.2.2 Dosing
The Flowmax 242i can be configured for manually dosing by choosing the dosing
function via the user display. The Volume “Dosing Quantity“ and the “Dosing
Time“ are freely adjustable. The dosing time is intended as a safeguard against
unintentional overspill. After the set time has passed, the output switches
regardless of the measured quantity. When “Dosing Time“ is set to zero, the timer
control is inactive. A dosage can be started and stopped with the menu function
keys “Start“ and “Stop“.
Setting range “Dosing Quantity”: 0 – 3500 Liters, in steps of 0.001 L
Default setting “Dosing Quantity”: 0 Liters
Setting range “Dosing Time” 0 – 30000 Seconds, in steps of 0.1 sec,
having an accuracy of +0/-1 sec
Default setting “Dosing Time”: 3 Seconds
Example:
Dosing time = 3 seconds. That means Flowmax is sending the closing signal
after 2.1 to 3.0 sec to the valve. The dosing time is intended as a safety function
and should be selected insignificantly longer than the actual time required for
dosing. This ensures that possible malfunctions/leakages in the
structure/system are detected at an early stage. An exact dosage purely on the
dosing time is not useful.
IMPORT NT!
If Dosing Time = 0 the time switch-off is inactive.
To be able to activate dosing, a digital output must be parameterised for dosing.
Dosing can be started both via the menu and via the digital input.
W RNING!
The customer has to provide a technical solution for overfill protection
and an emergency stop switch. Both functions must run for safety to valve
closure.
W RNING!
IMPORT NT!

Flowmax

242i Commissioning
M I B 17
3.2.3 Media
3.2.3.1 Set Offset
In the sub menu “Set Offset” it is possible to set the actual offset of the flow meter.
Use this function only when Flowmax 242i is completely filled with liquid, and
there is no flow. If the offset is set while flow is present or when the pipe is empty
it will cause an offset drift what results in a faulty measurement. Example of
operation see appendix.
A small offset change, e.g. caused by variable temperatures, is automatically
done by the flow meter. It is also possible to set the offset via the configurable
digital inputs.
IMPORT NT!
In contrast to the basic trim, the Set Offset is not stored in the device. When the
unit is restarted, the original, last stored value is active
3.2.3.2 1-Pt-Correction
Setting range: -50.0 ... 50.0 % in steps of 0.1%
Default setting: 0 %
Example of operation see appendix.
3.2.3.3 Creeping suppression
The creeping suppression excludes flow measurements that result from
convection in a narrow band around zero, even with a closed valve. At the factory,
the creeping suppression is set at a standard value in relation to the cross-section
of the flow meter. Changes to a smaller value of the parameter may cause an offset
drift what results in a faulty measurement.
There are higher tolerances below the standard default settings, see also section
5.3 measurement errors!
Creeping suppression works with a hysteresis of 0 % to - 25%.
Figure 10: Function of the creeping suppression illustrated with 0.6 l/min
IMPORT NT!

Commissioning Flowmax

242i
18 M I B
Example: Creeping suppression = 0.6 l/min
If the flow rate is lower than 0.45 l/min the creeping suppression
becomes active. If the flow rate exceeds 0.6 l/min a pulse is output
again and added to the totalizer. Similarly, a value is transmitted to the
analog output again.
Setting range: 0.0...3 l/min, in 0.006 l/min steps
Default settings: 0.012 l/min for DN 3
0.024 l/min for DN 5
0.09 l/min for DN 7
0.3 l/min for DN 10
Lag Creeping Flow
The activation of the creeping suppression can be delayed. The value is
adjustable via menu.
Figure 11: Function Lag Creeping Flow
Setting range: 0 ... 99.0 s in steps of 0.1 s
Default settings: 0.5s
3.2.3.4 Basic Trim
The “Basic Trim” function insures that the flowmeter is conforming to the media
specific characteristics. To execute this function, Flowmax 242i runs a self-
diagnostic function which optimizes all important parameters. This process lasts
approximately 1 minute.
IMPORT NT!
To make sure the basic trim is correctly done, the flow meter has to be filled with
liquid without a flow.
When there is an error detected while performing the basic trim function, the
display shows “Error”. After successfully finishing the basic trim function, the
display will show “Done”
0
5
10
15
20
25
30
35
40
45
0 1 2 3 4 5 6 7 8 9 10 11 12
Flow [ml/s]
Time [s]
Function Lag Creeping Flow
Example 2 Seconds
Schleichmenge
Schleichmenge x 0,75
Fluss ohne Schleichmenge
Fluss ohne
Schleichmengeverzögerung
Fluss mit Schleichmenge 2s
Verzögerung
NOTICE!
IMPORT NT!
Creeping Suppression
Creeping Suppression
x 0.75
Flow without
Creeping Suppression
Flow without
Lag Creeping Flow
Flow with 2 sec
Lag Creeping Flow

Flowmax

242i Commissioning
M I B 19
3.2.4 General Settings
3.2.4.1 Reset Counter
The volume counter of Flowmax 242i can be reset.
Example of operation see appendix.
IMPORT NT!
Once reset, counter values cannot be restored. After a reset the counter works
normally.
3.2.4.2 Empty pipe delay
Small air bubbles or particles, which are carried with the liquid, disturb the
sound transmission in the measuring channel.
During the set time, but for max. 3 sec, the last undisturbed flow value will be
output, afterwards the flowmeter behaves as if there is no flow and only after
the preset delay time the flowmeter will go into alarm.
Setting range: 0.0 … 3000.0 s
Default settings: 0.5 s for all DN
3.2.4.3 Hysteresis
The limit values can be provided with a hysteresis. This is to avoid frequent
switching of the outputs when the flow moved to a limit around.
0
50
100
150
200
0 1 2 3 4 5 6 7 8 9 10 11
Flow [ml/s]
Time [s]
Upper Limit=110ml/s Hysteresis=20 ml/s Filter=Off Obergrenze
110 [ml/s]
Obergrenze -
Hysteresis
90 [ml/s]
Obergrenze +
Hysteresis
130 [ml/s]
Fluss Filter
[ml/s]
Digital Ausgang
= Obergrenze
24V schliesser
Upper Limit
110 [ml/s]
Upper Limit –
Hysteresis
90 [ml/s]
Upper Limit +
Hysteresis 130
[ml/s]
Flow filter
[ml/s]
Digital Output
= Upper Limit
24Vnormal
open
0
50
100
150
200
0 1 2 3 4 5 6 7 8 9 10 11
Flow [ml/s]
Time [s]
Upper Limit=110 ml/s Hysteresis=20 ml/s Filter=medium (3s) Obergrenze
110 [ml/s]
Obergrenze -
Hysteresis
90 [ml/s]
Obergrenze +
Hysteresis
130 [ml/s]
Fluss Filter [ml/s]
Digital Ausgang =
Obergrenze
24V schliesser
Fluss [ml/s]
IMPORT NT!
Upper Limit
110 [ml/s]
Upper Limit –
Hysteresis
90 [ml/s]
Upper Limit +
Hysteresis 130
[ml/s]
Flow filter
[ml/s]
Digital Output
= Upper Limit
24Vnormal
open
Flow [ml/s]

Commissioning Flowmax

242i
20 M I B
Figure 12: Function Hysteresis at limit
Setting range: 0 … 8000.00 ml/s in steps of 0.01 ml/s.
Default settings: 0 for all DN
3.2.4.4 Lower Limit
Here, the lower limit for the digital output is set.
Setting range: 0 to 20000.00 ml/s in steps of 0.01 ml/s.
Default settings: 0 for all DN
3.2.4.5 Upper Limit
Here, the lower limit for the digital output is set.
Setting range: 0 … 20000.00 ml/s in steps of 0.01 ml/s.
Default settings: max. Flow of the flowmeter (depending on the diameter)
DN3: 25 ml/s
DN5: 50 ml/s
DN7: 100 ml/s
DN10: 400 ml/s
3.2.4.6 Pulse value
The pulse value determines the flow volumes for which an output pulse will be
emitted.
Choose a configuration which will neither exceed the maximum output frequency
of the Flowmax 242i (10kHz) nor the maximum input frequency of the control. If
the maximum frequency is exceeded the Flowmax 242i will not output pulses
correctly.
Example: 2.0 ml/Pulse
This means: a pulse is emitted every 2.0 ml.
Setting range: 0.1...3000.0 ml/Pulse, in 0.1 ml/Pulse steps
Default setting: 1.0 ml/pulse for DN 5, 7, 10
0.1 ml/pulse for DN 3
Flow Pulse value Frequency Period Duration of the pulse
ml/s ml/Pulse Hz s s ms
1 1 1 1 0,5 500
100 1 100 0,01 0,005 5
1000 0,1 10000 0,0001 0,00005 0,05
100 10 10 0,1 0,05 50
0,5 10 0,05 20 1 1000
In the last case every 20 seconds, a pulse of 1 second duration is put out.
0
20
40
60
80
100
01234567891011
Flow [ml/s]
Time [s]
Lower Limit=60ml/s Hysteresis=15 ml/s Filter=Off Untergrenze
60 [ml/s]
Untergrenze -
Hysteresis
45 [ml/s]
Untergrenze +
Hysteresis
75 [ml/s]
Fluss Filter [ml/s]
Digital Ausgang
= Untergrenze
24V schliesser
Lower Limit
60 [ml/s]
Lower Limit –
Hysteresis
45 [ml/s]
Lower Limit +
Hysteresis 75
[ml/s]
Flow filter
[ml/s]
Digital Output
= Lower Limit
24Vnormal
open