MIB Flowmax 42i User manual

Flowmax

42i
Ultrasonic flow
metering / dosing
device
Operating manual
BA 014E/FM42i/06.22
Valid starting from
Hardware V 2.1
Software V 1.29

eneral safety instructions Flowmax

42i
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:
IMPO TANT! indicates situations or cases
which, if not avoided, could result in
damage or failure of the Flowmax 42i
equipment.
WA NING! 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 flowmeter Flowmax 42i may only be used for measuring the flow of
pure, homogeneous liquids.
 The Flowmax 42i is not intended for use in medical applications.
 The volume flowmeter Flowmax 42i 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 flowmeter.
Conversions and/or changes to the flowmeter 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
 Assembly, electrical installation, commissioning and maintenance of
the flowmeter 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 flowmeter 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 flowmeter 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.
IMPO TANT!
WA NING!
NOTICE!
WA NING!

Flowmax

42i Contents
M I B 3
Contents
General safety instructions .......................................................................................................... 2
Contents ........................................................................................................................................ 3
List of figures ................................................................................................................................ 4
1. Planning information ............................................................................................................. 5
1.1 Areas of application.................................................................................................................................. 5
1.2 Measuring principle .................................................................................................................................. 5
1.3 Operational safety .................................................................................................................................... 6
2. Assembly and installation..................................................................................................... 7
2.1 Installation instructions ............................................................................................................................. 7
2.2 Assembly of the flowmeter ....................................................................................................................... 8
2.3 Electrical wiring ...................................................................................................................................... 10
3. Commissioning .................................................................................................................... 14
3.1 Operation ............................................................................................................................................... 14
3.1.1 Display and user menu ................................................................................................................... 15
3.2 Functionalities of flowmeter and default settings ................................................................................... 18
3.2.1 Language ........................................................................................................................................ 18
3.2.2 Dosing ............................................................................................................................................. 18
3.2.3 Media............................................................................................................................................... 19
3.2.3.1 Set Offset ................................................................................................................................. 19
3.2.3.2 1-Pt-Correction ......................................................................................................................... 19
3.2.3.3 Creeping suppression .............................................................................................................. 19
3.2.3.4 Basic Trim ................................................................................................................................ 20
3.2.4 eneral Settings ............................................................................................................................. 21
3.2.4.1 Reset Counter .......................................................................................................................... 21
3.2.4.2 Empty pipe delay ...................................................................................................................... 21
3.2.4.2 Hysteresis ................................................................................................................................ 21
3.2.4.3 Lower Limit ............................................................................................................................... 22
3.2.4.4 Upper Limit ............................................................................................................................... 22
3.2.4.5 Pulse value ............................................................................................................................... 23
3.2.4.6 Total Counter ........................................................................................................................... 23
3.2.4.7 Counter .................................................................................................................................... 23
3.2.5 Display ............................................................................................................................................ 24
3.2.5.1 Units ......................................................................................................................................... 24
3.2.5.2 Filter for Display ....................................................................................................................... 24
3.2.5.3 Rotate Display .......................................................................................................................... 24
3.2.5.4 Flashing .................................................................................................................................... 25
3.2.6 Analog Output QA ........................................................................................................................... 25
3.2.6.1 Function ................................................................................................................................... 25
3.2.6.2 Filter ......................................................................................................................................... 27
3.2.6.3 Output Value ............................................................................................................................ 27
3.2.7 Digital Outputs Q1 and Q2 (Q2 only available with 8-pin plug) ...................................................... 28

List of figures Flowmax

42i
4 M I B
3.2.8 Digital Input I1 (only available with 8-pin plug) ............................................................................... 31
3.2.9 Diagnostic ....................................................................................................................................... 31
3.2.9.1 Testing Flow ............................................................................................................................. 31
3.3 Overview of default settings ................................................................................................................... 32
3.4 eneral Information ............................................................................................................................... 32
4. Exchange of flowmeter ....................................................................................................... 33
5. Technical specifications ..................................................................................................... 34
5.1 Dimensions and weight of the compact version .................................................................................... 34
5.2 Dimensions and weight of the separated version .................................................................................. 35
5.3 Technical specifications ......................................................................................................................... 36
6. Accessories ......................................................................................................................... 37
7. Shipment .............................................................................................................................. 37
Appendix ..................................................................................................................................... 38
List of figures
Figure 1: Presentation of the principle of ultrasonic flow measuring ................................................................. 5
Figure 2: ideal installation position of Flowmax 42i in the compact version ...................................................... 7
Figure 3: ideal installation position of Flowmax 42i in the separated version .................................................... 7
Figure 4: Mounting examples for Flowmax 42i .................................................................................................. 8
Figure 5: Mounting possibilities .......................................................................................................................... 9
Figure 6: Fixing Flowmax 42i ............................................................................................................................. 9
Figure 7: Flowmax 42i mounted on a DIN rail ................................................................................................... 9
Figure 8: Pin code: Connection plug / socket for 5-pin version ............................................................. 10
Figure 9: Pin code: Connection plug / socket for 8-pin version ............................................................. 12
Figure 10: Pin code: Connection plug / socket for 8-pin version ........................................................... 13
Figure 11: Operating with the key pad ............................................................................................................. 15
Figure 12: Menu structure Flowmax 42i ........................................................................................................... 17
Figure 13: Function of creeping suppression illustrated with 0.6 l/min ............................................................ 19
Figure 14: Function Lag Creeping Flow ........................................................................................................... 20
Figure 15: Function Hysteresis at limit ............................................................................................................. 22
Figure 16: The current output is active ............................................................................................................ 25
Figure 17: Characteristic curve 0 … 20mA ...................................................................................................... 26
Figure 18: Characteristic curve 4 … 20mA ...................................................................................................... 26
Figure 19: Function Filter of analog output ...................................................................................................... 27
Figure 20: Deviation of temperature measurement ......................................................................................... 28
Figure 21: Connecting Digital Output to relay .................................................................................................. 30
Figure 22: Connecting Digital Output to counter .............................................................................................. 30

Flowmax

42i Planning information
M I B 5
1. Planning information
1.1 Areas of application
The flow measurement device Flowmax 42i is designed to measure dynamic
flow in pipes and tubes. This flowmeter is suitable for liquids only. The Flowmax
42i is used in
 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 42i 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

Planning information Flowmax

42i
6 M I B
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 42i 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 42i meets the safety requirements concerning the Protective Extra
Low Voltage directive according to EN 50178, SELV, PELV.

Flowmax

42i Assembly and installation
M I B 7
2. Assembly and installation
2.1 Installation instructions
The arrow on the nameplate of the Flowmax 42i shows the positive flow
direction. The flowmeter has to be installed in a way so that the flow-through is
in the same direction as the arrow symbol.
Figure 2: ideal installation position of Flowmax 42i in the compact version
Figure 3: ideal installation position of Flowmax 42i in the separated version
For fastest possible bubble detection it is important to keep the pipe distance
from tank to Flowmax 42i 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 42i as close as possible to the dosing valve, as soft pipes change the
cross-section depending on the system pressure. This may lead to repeatable
differences.
Insure that no cavitation dissolve from the measured liquid. Depending on the
measured liquid it can be helpful to have enough back pressure on the outlet of
Flowmax 42i to avoid cavitation. Insure all mechanical connections are tight.
Particles present in the flow stream may result in measuring errors.
Inlet
Outlet
NOTICE!
NOTICE!

Assembly and installation Flowmax

42i
8 M I B
When using pumps, Flowmax 42i must be installed in flow direction on the
pressure side, in order to ensure sufficient pressure. The maximum pressure
rating of Flowmax 42i has to be considered.
WA NING!
Do not exceed the maximum pressure allowance for of the Flowmax 42i
(see section 5.3 Technical specifications). Exceed the maximum pressure
can lead to destruction of the Flowmax 42i.
For correct volume flow measurements straight and unobstructed inflow and
outflow distances have to be observed. Starting from the connection thread
these straight and unobstructed flow zones must be:
Nominal diameter DN 3 DN 5 DN 7 DN10 DN15
Inflow distance 0cm 0cm 0cm 5cm 40cm
Outflow distance 0cm 0cm 0cm 0cm 20cm
2.2 Assembly of the flowmeter
The flowmeter is mounted into a pipe system by using the mechanical
connection. Flowmax 42i should be mounted vertically into the pipe for the best
measuring performance. Do not install the flowmeter after a dosing valve where
the flowmeter can run empty. Placing the flowmeter 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 42i should be installed
on the pressure side of the pump.
It is recommended to place the pump in the same plane as the container. Thus,
the pump runs independently full and there is caused no vacuum when
promoting.
Figure 4: Mounting examples for Flowmax 42i
If it is not possible to mount the flowmeter vertically, then mount the flowmeter
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 42i.
Flowmax
Pump
Valve
Container
Valve
WA NING!
NOTICE!

Flowmax

42i Assembly and installation
M I B 9
IMPO TANT!
Flowmax 42i must be installed without mechanical tensions on the
existing pipe system. The flowmeter may be damaged if there is tension
on the existing pipe system.
WA NING!
Non-compliance of the installation instructions may result in tearing of the
housing, liquid may leak out.
Figure 5: Mounting possibilities
For applications with a “clean design“ for which it is necessary to completely
drain the pipe system, we recommend mounting the flowmeter in the vertical
position. Residual liquid may remain inside the device if flowmeter is mounted
horizontally.
Vibrations or mechanical forces may decrease measuring accuracy. So if there
is due to vibration or mechanical movements is necessary to fix Flowmax 42i
additionally, the instrument can be either mounted on a DIN rail, or be fixed on
the lateral slot.
Figure 6: Fixing Flowmax 42i
Figure 7: Flowmax 42i mounted on a DIN rail
Flowmax
Flowma
Process
Process
Valve
Valve
WA NING!
IMPO TANT!

Assembly and installation Flowmax

42i
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.
Always 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 42i is not assembled and installed.
Wiring installation, disassembly and removal must be performed by
qualified persons experienced and knowledgeable about electrical
work.
Figure 8: Pin code: Connection plug / socket for 5-pin version
Connector cable pin configuration defined by manufacturer.
The outlets may be re-programmed for specific applications.
5-pin plug with 1-wire communication:
Pin
Function
Description
1 24 VDC 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.
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
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
5 Analog output QA 4 ... 20mA; 0 ... 20mA
Example: 0l/min => 4mA
6l/min => 20mA (depending on
diameter)
Empty pipe Alert => 3.5mA
WA NING!

Flowmax

42i Assembly and installation
M I B 11
5-pin plug with S485 communication and current output:
Pin
Fun
c
tion
Description
1 24 VDC Voltage Supply: 18 ... 30 VDC
2 Communication RS 485 B
3 ND round: 0 V
4 Communication RS 485 A
5 Analog output QA 4 ... 20mA; 0 ... 20mA
Example: 0l/min => 4mA
6l/min => 20mA (depending on
diameter)
Empty pipe Alert => 3.5mA
5-pin plug with S 485 – communication and digital output Q1:
Pin
Fun
c
tion
Description
1 24 VDC 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.
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
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 RS 485 A
5 Communication RS 485 B

Assembly and installation Flowmax

42i
12 M I B
8-pin plug with 1-wire communication:
Figure 9: 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.
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
*it applies: for Q1 + Q2 ≤ 100mA

Flowmax

42i Assembly and installation
M I B 13
8-pin plug with S 485 communication:
Figure 10: 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.
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 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.
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 RS 485 A
7 Communication RS 485 B
8 Shielding EMC safety
ATTENTION:
Only operate the flowmeter Flowmax42i within the operating limits
stipulated on the product label and the operating manual / data sheet.
Use of the Flowmax 42i outside these conditions will lead to overloads
which cause permanent damage.
IMPO TANT!

Commissioning Flowmax

42i
14 M I B
3. Commissioning
NOTE:
After starting up the electronics, the unit is ready for use, but it reaches its
optimum operating state after 30 minutes. It makes sense to carry out a basic
trim or zero point adjustment only after this warm-up phase.
NOTE:
If Flowmax 42i 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 (alternatively FlowCon 200i).
During the adjustment, the medium may not flow, as this can lead to a
measurement deviation. If there is a possible flow, it will be stored as "zero
point".
3.1 Operation
If Flowmax 42i is used as a volume flowmeter for water or water-like liquids it
will not require on-site calibration. Parameters for water are calibrated at the
factory. The Flowmax 42i may also be ordered with customized settings, but
customized settings must be requested when Flowmax 42i 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)
NOTICE!
NOTICE!
NOTICE!

Flowmax

42i Commissioning
M I B 15
3.1.1 Display and user menu
Flowmax 42i is equipped with a display to visualize actual measurement values
and to change parameters of the flowmeter. Menu navigation and parameter
changes are controlled by the four keys on the keypad.
Figure 11: 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 42i 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 42i 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

42i
16 M I B

Flowmax

42i Commissioning
M I B 17
Figure 12: Menu structure Flowmax 42i

Commissioning Flowmax

42i
18 M I B
3.2 Functionalities of flowmeter 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 42i 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.
IMPO TANT!
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.
WA NING!
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.
WA NING!
IMPO TANT!

Flowmax

42i Commissioning
M I B 19
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
flowmeter. Use this function only when Flowmax 42i is completely filled with
liquid, and there is no flow, as this condition is the new “zero” value.
Example of operation see appendix.
A small offset change, e.g. caused by variable temperatures, is automatically
done by the flowmeter. It is also possible to set the offset via the configurable
digital inputs.
IMPO TANT!
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 flowmeter. 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 13: Function of creeping suppression illustrated with 0.6 l/min
IMPO TANT!

Commissioning Flowmax

42i
20 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 ... 19.2 l/min, in 0.0006 l/min steps
Default settings: DN 3 0,015 l/min
DN 5 0,024 l/min
DN 7 0,09 l/min
DN10 0,3 l/min
DN15 0,9 l/min
Lag Creeping Flow
The activation of the creeping suppression can be delayed. The value is
adjustable via menu.
Figure 14: 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 42i runs a self-
diagnostic function which optimizes all important parameters. This process lasts
approximately 1 minute.
IMPO TANT!
To make sure the basic trim is correctly done, the flowmeter 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
Creeping Suppression
Creeping Suppression
x 0.75
Flow without
Creeping Suppression
Flow without
Lag Creeping Flow
Flow with 2 sec
Lag Creeping Flow
NOTICE!
IMPO TANT!