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d·flux multi series

Multi-Parameter Mass Flow Meter & Mass Flow Controller for Gases

The d·flux multi series is a fast and reliable multi-parameter mass flow meter for gases with measurement outputs for mass, volumetric and normalized flow, pressure and temperature. One of the many advantages of this laminar flow meter is the ability to easily switch to a different gas without a loss in accuracy.

Key Features

d-flux multi series – Multi-Parameter Massedurchflussmesser & Massedurchflussregler für Gase

Meter and Controller

The unit is available as meter or with a strong integrated control valve as controller.

State-of-the-art communication

Advanced Modbus communication & analog output.
Optional Profinet or EtherCAT interface available (Ethernet IP available soon)

d·flux multi series Profinet & EtherCAT communication

Wireless device access with the free Vögtlin Connect app

Easy device access and configuration of many parameters with our free Android app (Bluetooth®).

Flow rates up to 1400 ln/min

Rate for air, other gases according to conversion (for instance hydrogen: up to 2900 ln/min).

Custom application profiles

The unit offers up to 15 application profiles, which allow the storage of individual application details like flow rate, gas, PID, etc. Every profile has an individual totalizer

Wide choice in materials

The units are available in aluminium (economical and light) and stainless-steel (all wetted parts). Elastomers are available in FKM, EPDM or FFKM. For hydrogen applications, we can supply a gold coated pressure sensor.

5 different sensor options

Our core sensor is an economical solution for air, nitrogen, oxygen and argon. Our prime sensor is suitable for all gases and has an high accuracy option. For hydrogen we recommend our gold-plated prime sensor.

Wide application scope IP54

Suitable up to 14 bar a and from -20 to 60 °C. Body in stainless-steel or aluminium Protection IP54.

Minimum inlet required

Compact design, requires no long straight or special inlet and outlet sections.

High accuracy, sample rate and fast response

Up to ± 0.3% user full scale and ± 0.5% of measured value.

High sample rate and fast response

Sample rate of 1 ms, updated data every 10 msec and a total response time of 120 msec (controller 2s).

Custom application profiles

The unit offers up to 15 application profiles, which allow the storage of individual application details like flow rate, gas, PID, etc. Every profile has an individual totalizer

Alarm, warning and diagnostic features

The d·flux multi series integrates advanced diagnostics, monitoring and reporting every part of its operation. The information is accessible via Vögtlin Connect app or Modbus

Autotare

To minimize uncertainty, the d·flux multi controller detects with an advanced algorithm when there is no flow and will then automatically zero (tare) for the unit optimum performance. For the meter this optimization needs to be performed manually.

Vögtlin Flow Studio Software

You can communicate to the d·flux in a Microsoft Windows environment through Modbus. To make this simple, we supply our free software. Easy to install, configure the unit and discover useful options such as graphs and data collection.

Versions

d·flux multi series Mass Flow Meter for Gas

d·flux multi meter DFM

Multi-parameter mass flow meter
Flow rate up to 1400 ln/min for air
Anodised aluminium or stainless steel 316L (1.4404)
Modbus communication & analogue signals
FKM, EPDM or FFKM elastomers
Modbus and analogue output

d·flux multi series Mass Flow Controller for Gas

d·flux multi controller DFC

Multi-parameter mass flow meter
Flow up to 1400 ln/min for air
Anodized aluminium or stainless steel 316L (1.4404)
FKM, EPDM or FFKM elastomers
Modbus & analog output

d·flux multi series Modbus & Analog communication

Analogue and digital interfaces

The devices have Modbus and analogue output as standard.

Interfaces for the Ethernet protocols PROFINET & EtherCAT are optionally available (EtherNet/IP™ coming soon).

d·flux multi series with Profinet or EtherCAT communication

Tech Specs

Measuring Ranges
Standard ranges
(air / user adjustable)¹
LFE1400 from 0-1000 ln/min to 0-1400 ln/min
LFE1000 from 0-700 ln/min to 0-1000 ln/min
LFE700 from 0-500 ln/min to 0-700 ln/min
LFE500 from 0-350 ln/min to 0-500 ln/min
Gases Max. range Core Prime Prime H2
Air 0-1400 ln/min
N2 0-1400 ln/min
Ar 0-1240 ln/min
O2³ 0-1400 ln/min
He 0-1400 ln/min
CO2 0-740 In/min
CO 0-1390 In/min
H2 0-2900 In/min

Above are the default gases pre-programmed for each sensor. More gases can be added as options.²

¹Unless clearly stated, the specified flow ranges are for an equivalent flow of air at 1013.25 mbar a (760 mmHg) and 0 °C (32 °F). Other common flow, temperature and pressure units can be selected through the Vögtlin Connect app or the digital communication interface. More information available in the d·flux multi operating instructions.
²Additional gases or gas mixtures can be added to the above standard list. Maximum you can store up to 15 gases per unit. Stored gases can be replaced by another gas or gas mixture (except for air). Programmed gases/mixtures can be selected through the Vögtlin Connect app or the digital communication interface. For other gases, gas mixtures and reference conditions please contact the factory. Only suitable for dry and clean gases.
³Optional O2 cleaning possible upon request.

Profiles
Customer defined profiles Up to 15 user programmable profiles Profiles are preset configurations where the customer can set the gas, range, dynamics, totalizers, engineering units and reference conditions for up to 15 different applications
Performance Data
Accuracy A1 Core: ± 0.5% of user full scale ± 1% of measured value.
B1 Prime: ± 0.3% of user full scale ± 0.7% of measured value.
B2 Prime high accuracy: ± 0.3% of user full scale ± 0.5% of measured value.
For hydrogen applications:
B3 Prime H2: ± 0.3% of user full scale ± 0.7% of measured value.
B4 Prime H2 high accuracy: ± 0.3% of user full scale ± 0.5% of measured value.
User full scale = ~70…100% standard range.
Media All gases and gas mixtures that are compatible with the selected materials and for which data is
available in the NIST refprop database.
Contact the factory for more information.
Dynamic range Fixed dynamics: 1 : 100 for most gases* VADy® dynamics: up to 1 : 1000 (available for meter only) VADy® or a fixed dynamic range can be selected during order process.
This setting can be changed at any time using the Vögtlin Connect app.
*The dynamic range is gas and pressure dependent, higher pressures means lower dynamic range.
Response time Meter: 120 msec / Controller: 2000 msec (according to SEMI standard SEMI E17-1011)*
Update time mass flow value: 10 msec / Sensor sample rate: 1 msec
*With optimized filter settings. All filter modes and values can be set through the Vögtlin Connect app or the digital communication interface.
Repeatability ± 0.2% of factory full scale (according to SEMI standard E56-0309)
Longterm stability Typical < 0.2% of measured value / year after tare
Power supply Meter: 15-36 Vdc, (200 mA@24Vdc, regulated) / Controller: 24 Vdc ±10%, (2000 mA@24Vdc, regulated)
Power in through M8-4P connection or optionally through D-sub connection
(ripple should not exceed 100 mV peak-to-peak) We recommend that the body of this unit is properly connected to ground
Operation pressure 1  to 14 bar a
Temperature (environment/gas) -20 to +60 °C (-4 to 140 °F)
Humidity gas 0-95% Rh (non-condensing)
Pressure sensitivity Prime and Prime H2 sensor: <0.05% factory full scale per bar (typical air).
Core sensor: <0.08% of factory full scale + 0.1% of measured value per bar (typical air).
Temperature sensitivity <0.02% FFS* per 1 °C of inlet gas temperature @ 7 bar a pressure
*Factory Full Scale (maximum flow range of the device)
Accuracy temperature Typically ± 0.5 °C (not certified)
Accuracy absolute pressure <0.5% MV (not certified)
Warm-up time <2 sec for full accuracy
Materials
Wetted parts Elastomers: FKM, EPDM, FFKM (valve seat). Full FFKM version upon request.
Body: Stainless-steel 316L (1.4404).
Valve (controller): 316 (1.4401), 416 (1.4005), 430F (1.4104).
Inlet filter: Stainless-steel 316 (1.4401), fastening stainless-steel (1.4122) or equivalent.
A1 core sensor: Stainless-steel 316Ti (1.4571), silicon, gold, glass, silicone encapsulation, PBT. 30GF, ceramics.
B1 + B2 Prime sensor: Stainless-steel 316L (1.4404).
B3 + B4 Prime H2 sensor: Stainless-steel 316L (1.4404) with gold coating.
Electronic housing Powder coated stainless steel
Integrated inlet filter 50 micron SS316 (1.4401) filter. Fastener filter material stainless-steel (1.4122) or equivalent.
Wetted part surface roughness 1.6 Ra µm or better (contact factory for lower Ra values)
Integration & Installation
Output signals analog Linear 4–20 mA or customer defined (max 20 mA), user selectable
Linear 0–5 Vdc or 0-10 Vdc or customer defined (max 10 Vdc), user selectable
mA output: 740 ohms maximum load resistance
Volt output: 1000 ohms minimum load resistance
All analog outputs are galvanically separated and protected. If used with analog signals add + as before 0.2% of FFS to the uncertainty
Setpoint signals analog Linear 4–20 mA or customer defined, (max 20 mA) user selectable
Linear 0–5 Vdc or 0-10 Vdc or customer defined, (max 10 Vdc) user selectable
Output signals digital RS-485 (Modbus RTU 2-wire)
The Modbus address can be set with 2 rotary switches on the outside of the housing.
All Modbus settings can be set through the Vögtlin Connect app.
Optional Profinet or EtherCAT Dual port RJ45 with integrated switch (easy to daisy chain)
RJ45 LEDs indicating link and activity on the network / Ethernet speed: maximum 100 Mbit
ProfiNet: PROFINET IO specification v2.33 / PROFINET IO devices conformance class B (RT) / Endianness: conform Siemens S7 (big)
EtherCAT: IEC standard IEC61158 / Endianness: little
EtherNet/IP™ coming soon.
Configuration interface Wireless Vögtlin Connect app available from Google Play store
Output I/O MOSFET On/off for external shut-off valve or alarm available through M8-4P connector
Contact type: MOSFET (open drain/collector)
Maximum voltage: 36 Vdc, Max current 500 mA (Polyfuse protected)
Electrical connection 9-pin D-sub male (power and signals) and M8-4P connector (Power + I/O MOSFET output)
Optional 2 x RJ45 (EtherCAT / Profinet)
Process connection 1″ BSPP female (1″G)
Optional ½” BSPP, 1″ Compression or Tri-clamp 50.5mm flange size (ISO) (see accessories tab)
Inlet section None required if our standard inlet filter / conditioner is installed
Without filter / conditioner a 10 D straight inlet is recommended
The inlet filter can be deselected at time of order
Pressure drop Meter: Standard 400 mbar at factory full scale air venting to atmosphere (with filter / conditioner)
Optional: 325 mbar at factory full scale air venting to atmosphere (without filter / conditioner)
Pressure drop is dependent on operating pressure (higher pressure = lower pressure drop)
For more information please refer to your sales partner
Controller: Min. pressure difference required for 1400 ln/min (air) < 2 bar
Contact your sales partner for other pressure drop requirements
Mounting orientation All orientations are possible
Weight Meter: 3.7 kg, Controller: 8.7 kg (excluding ethernet and fittings)
Safety
Test pressure after production 28 bar a
Maximum overpressure sensor Core Sensor: 28 bar a, Prime and Prime H2 Sensor: 90 bar a
Burst pressure Meter: 100 bar a, Controller: 70 bar a
Leak rate < 1 x 10-6 mbar l/s He
Ingress protection class IP54, if IP54-D-sub is used (see accessories tab)
For optional EtherCAT/Profinet: IP40


For additional safety information please consult the d·flux safety information sheet available on our website
Certifications
EMC IEC/EN 61326-1, IEC/EN 61000-6-2/4
ATEX certification None
Material certificates To be released in 2023 (available for meter only)
FDA compliance To be released in 2023 (available for meter only)
PED Fully compliant. Since the unit has 1″ process connection, complies with the SEP, as defined in article 4, paragraph 3 of the Pressure Equipment Directive (PED) (2014/68/EU)
RoHS / REACH All components comply with Directive 2002/95/EC (RoHS) and the REACH guidelines
Warranty 3 years, excluding cases of corrosion

Accessories

IP54-D9-sub connector

IP54-D9-sub connector

This plug connects to the male D-sub on top of the d·flux unit to connect the signals and power.
With this plug installed and the cap on the DIN M8 connector the integrity rating of this unit is IP54.
Available as plug only (solder connections inside) or with 2 meter cable with fly leads.

Art-N° 328-2093 IP54-D9-sub connector (IP54 rated, 9 solder connections, no cable)
Art-N° 328-2094 IP54-D9-sub connector (IP54 rated with 2 meter cable and fly leads (9))
IP20-D-sub connector

IP20-D-sub connector

Available as plug only or with 3 meter cable (for indoor IP20 applications only)

Art-N° 328-2102 IP20-D9-sub connector (IP20 rated, 9 solder connections, no cable)
Art-N° 328-2103 IP20-D9-sub connector (IP20 rated with 3 meter cable and fly leads (9))
IP40-Power supply

IP40-Power supply

In: 100-240 Vac / Out: 24 Vdc, 2.2A with M8-4pin connector
Not suitable for IP54 applications, for indoor IP40 applications only. Suitable for meters and controllers.
Used to configure the d·flux on your desktop with the Vögtlin Connect app

Art-N° 328-2361 Table top power supply (EU plug)
Art-N° 328-2362 Table top power supply (US plug)
Art-N° 328-2363 Table top power supply (GB plug)
Art-N° 328-2364 Table top power supply (AU plug)
Art-N° 328-2365 Table top power supply (CN plug)
IP20-RS485 to USB

IP20-RS485 to USB

A simple way to connect your d·flux over Modbus to your PC
Consisting of 1) RS485 to USB converter (no external power required for converter), 2) a USB-A (version 2.0) connection to your PC and 3) a 9 pin D-sub female connector to the d·flux / Total cable length 3 meters.
USB 2.0-B female to 1 x 9 pin serial RS422/485 male
Chipset: FT232HL, SP3078EE, Dimension: 80 x 72 x 23 (LxWxH)
Power supply for the d·flux needs to be purchased separately – not included in this kit.

Art-N° 328-2112
IP54-M8 plug

IP54-M8 plug

Available as plug only or with 2 meter cable. M8-4pin plugs are suitable for IP54 applications.
Maximum current 4 Amp.

Art-N° 328-2096 IP54-M8 connector (4 Pin straight female with screw terminals and cable gland)
Art-N° 328-2097 IP54-M8 connector as above but with 2 meter cable with fly leads
IP54-M8 cap

IP54-M8 cap

Cap to seal off M8 connection if not used (required for IP54 protection).
Supplied one with every unit. Only required when IP54 protection is lost or damaged

Art-N° 632-1221 IP54-M8 cap (to close off/open not used M8 connector)

Fittings

1” Compression fitting

1” Compression fitting

Stainless Steel Compression Tube Fitting, Male Connector, 1”. Tube OD x 1” BSPP tread
Male ISO Parallel Thread / Material SS316 (1.4401) including O-rings
Optional 3.1 Certificate upon request when order is placed

Art-N° 328-1254 FKM
Art-N° 328-1255 EPDM
DN50 Tri-clamp

DN50 Tri-clamp

Tri-clamp connection 50.5mm flange (ISO), to 1” BSPP tread
Material 316L (1.4404) including O-rings

Art-N° 328-1426 FKM
Art-N° 328-1427 EPDM
Reduced 1” BSPP to ½” female BSPP

Reducer 1” BSPP to ½” female BSPP

Reduced process connections from 1” BSPP male tread to 1/2” BSPP female
Material 316Ti (1.4571) including seal rings

Art-N° 328-1257 FKM

The new Vögtlin Connect App

The Vögtlin Connect app can be used with Android phones and lets you easily and securely (password protected) connect to your d·flux device.

Wirelessly readable / adjustable variables Read Write
Create & edit profiles (set of settings) YES YES
Flow range & dynamic range YES YES
Filter settings YES YES
Alarms and warnings YES YES
Analog in-/output configuration YES YES
Function of push button* YES YES
Read current values YES
Show graphs YES
Totalizer (read, select, reset) YES YES
Node / slave address setting YES YES
I/O for external valve on / off YES YES
Restart device YES
Password protection of unit YES YES
Factory reset YES
PID and valve parameters YES YES

* The external push button on the device can be programmed for one of the following functions: device restart, measurement on/off, warning reset or tare (long press). Activation/deactivation of connection to Vögtlin Connect App (short press).

The app works with Bluetooth® wireless technology and can be downloaded for free from Google Play store.

You can alternatively download the software directly from our website.

Downloads

329-2143_de_infodflux.pdfd·flux multi series Product InformationProduct DatasheetsEN, DEEN, DE
329-3081_de_manualdflux.pdfd·flux multi series Operating InstructionsOperating InstructionsEN, DEEN, DE
399-3050_en-dflux-safetyinfo.pdfd·flux multi series Safety InformationCertificates/StatementsEN
811-1227_ml_dflux_QSG.pdfd·flux multi series Quick Start GuideOperating InstructionsEN, DEEN, DE
vog-ethercat-manual-d-flux-en.pdfd·flux multi series Operating Instructions EtherCATOperating InstructionsEN
vog-profinet-manual-d-flux-en.pdfd·flux multi series Operating Instructions ProfinetOperating InstructionsEN
329-3080_ml_vogflowstudio.zipVögtlin Flow Studio 1.0.3SoftwareEN, DEEN, DE
voegtlin-connect-app.apkVögtlin Connect App 1.8.4SoftwareMLML
vog-d-flux-service-tool-windows-x86-104-to-108.zipd·flux Service Tool with Firmware Update 1.0.8 (for Firmware 1.0.4 or older)SoftwareEN, DEEN, DE
vog-d-flux-service-tool-windows-x86.zipd·flux Service Tool with Firmware Update 1.0.8 (for Firmware 1.0.5 or newer)SoftwareEN, DEEN, DE
vog-profinet-GSDML-d-flux.zipd·flux multi series Profinet GSDML FilesSoftwareMLML
d-flux_CDM212364_Setup Windows.zipd-flux multi series driver for RS485 to USB converterSoftwareMLML
d-flux-gaslist-EN-DE.xlsxd·flux multi series Gas ListOthersEN, DEEN, DE
d-flux-PR_DE.pdfd·flux ― Economic Gas Flow Measurement and ControlOthersEN, DEEN, DE
329-2135_de-triclamp.pdfTri-Clamp FittingsAccessories DatasheetsEN, DEEN, DE
399-3034_ml-dflux-conformity-ce.pdfd·flux multi series Declaration of Conformity CECertificates/StatementsEN, DEEN, DE
399-3035_ml-dflux-conformity-ukca.pdfd·flux multi series Declaration of Conformity UKCACertificates/StatementsEN, DEEN, DE

Tutorials & FAQs

What reference conditions (pressure and temperature) are the devices specified for?

Unlike liquids, gases can be compressed. The volume changes when the temperature and/or the pressure change. When specifying a gas volume, the reference temperature and the reference pressure must thus also always be specified. The flow unit is than referred to as normalized (f.i. ln/min) or standardized flow (f.i. ls/min)

When we refer to “Normal” flow we in general use:
Temperature Tn = 273,15 K, corresponds to 0 °C
Pressure Pn = 1013,25 mbar abs

When we refer to “Standard” flow we in general use:
Temperature Tn = 293,15 K, corresponds to 20 °C
Pressure Pn = 1013,25 mbar abs
See also: http://en.wikipedia.org/wiki/standard conditions

Please note: Not everyone understands standard conditions in the same way. In the case of reference pressure, everyone agrees, but in the case of reference temperature, there are differences:

  • Gas suppliers in Europe do not use 0 °C, but 15 °C as their “Normal condition”

To avoid misunderstandings, the reference conditions are specified clearly in our correspondence.
On request, we also deliver the devices with another reference temperature.

Do I have to place a filter in the gas line to the flow meter/controller?

If you use gas from a bottle which is clean and dry, there is, in general no need for a filter.

However, there is a risk during start-up of the devices, because dirt particles could be present in the line. It is recommended to install a bypass system, so that the line can be rinsed or can be exposed in response to possible repairs.

In the event that ambient or compressed air is used, the installation of a moisture and dust filter is strongly recommended.

Troubleshooting: Is there a checklist?

Within the troubleshooting pages in the operating instructions, we have summarised error patterns, possible causes and possible measures. If you do not recognise your error pattern or the suggested action is unsuccessful, please contact your Sales Ppartner. If you return the appliance, please refer to the ‘Returns’ section in the operating instructions.

How can the devices be cleaned?

Depending on the type of contamination, the devices can be cleaned on site. You can find more information on this topic in the operating instructions.

Is there a possibility for a remote maintenance in the event of malfunction?

Yes. In some cases it is convenient when we can access the client’s PC directly and solve issues online. Please contact us!
You can download the free software TeamViewer for remote support here.

Periodic calibration: How often do the devices need to be calibrated?

In principle, the user himself determines the calibrating interval. People often use one per year or in case of very clean gas, one per 2 years. The following questions/points can be helpful:

  • How important is it to maintain the accuracy of the measuring device?
  • What is the maximum allowable deviation?
  • Can the user determine the deviation of the measuring devices himself by means of a reference?
    Prior to installation into the system, the actual state is detected by means of a reference device. The customer determines the periodic inspection himself. It is important to make sure thereby that the measuring setup is always the same.
  • Internal or external specifications determine the interval:
    Is a periodic calibration from an accredited body required (e.g. Dakks (previously DKD) or SCS)?
  • Is the actual state determined prior to a recalibration?
    Yes, provided that the measuring device works, the current deviation is determined. A report is generated thereby. If it lies outside of the device specification, the measuring device is readjusted (adapted to a reference).

We suggest the following calibration interval:

1. First inspection after one year
2. After several calibrations have been made in succession, the deviation of calibration to calibration must be evaluated. Based on these data, a decision can be made to adapt the calibrating intervals.

The following influences can lead to an increased deviation:

1. No stable flow, caused by pulsating pumps, e.g.
2. The gas condenses or carries along liquid or dusty particles (applications with ambient air are particularly susceptible to contaminations. A filter needs to be provided here).
3. The effective pressure deviates considerably from the calibrated pressure (+/- 0,2%/bar).
4. The gas/gas mixture is not consistent with the calibrated gas.
5. The aging of electronic components can cause changes, sometimes even improvements. Electrical changes appear as a result of aging or gradual burning of components, which impact the quality of the output signal.