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d·flux
Multiparameter Series
Instruction Manual
Version: V2.1.A February 2025
IM-dflux
PN:

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Summary of Contents for Sierra d-flux

  • Page 1 d·flux Multiparameter Series Instruction Manual Version: V2.1.A February 2025 IM-dflux...
  • Page 2: Global Support

    Alt + left arrow. Manual Version: IM-dflux V2.1.A Released September 2024 Based on d·flux firmware 1.08 and Sierra Flow Connector App 1.8.4 (for updates see 13.1.1). The manufacturer reserves the right to modify this manual and technical data without prior notice.
  • Page 3 Sierra Instruments. The information contained in this manual is provided for information only and is subject to change without notice. Sierra Instruments assumes no responsibility or liability for any errors or inaccuracies in this manual.
  • Page 4: Table Of Contents

    Table of contents Document information ............................... 9 Document function ..................................9 Document conventions ................................9 Documentation .................................... 10 1.3.1 Standard documentation ..............................10 1.3.2 Supplementary device-dependent documentation ....................10 Basic safety instructions ............................11 Requirements for the personnel ............................11 Designated use .....................................
  • Page 5 Installation conditions ................................30 6.1.1 Mounting ....................................30 6.1.2 Mounting position ................................30 6.1.3 Environment and process requirements ........................30 6.1.4 Flow direction ..................................31 6.1.5 Block and bypass................................. 31 6.1.6 Pressure drop for d·flux meter (DFM) ........................... 31 Process connections................................. 32 6.2.1 Mounting the fittings ................................
  • Page 6 Sierra Flow Connector App settings ........................... 64 9.1.3 Sierra app updates ................................65 9.1.4 Structure and function of the operating menu ......................66 9.1.5 Access to the operating menu via Sierra Flow Connector App ............... 69 9.1.6 Password ....................................70 9.1.7 Factory reset ..................................70 9.1.8 Restart device ..................................
  • Page 7 General troubleshooting ..............................123 11.4 Resetting the measuring device ..........................123 Repair and service ..............................124 12.1 Spare parts ..................................124 12.2 Sierra services................................... 124 Maintenance ................................125 13.1 Maintenance tasks ................................125 13.1.1 Firmware update ................................. 125 13.1.2 Exterior cleaning ................................125 13.1.3...
  • Page 8 17.7 Contamination statement ............................... 137 17.8 CE Declaration ..................................137 17.9 History change manual ..............................137 17.10 Trademarks ..................................138 Index ................................... 139...
  • Page 9: Document Information

    Document information Document function Thank you for selecting the Sierra device(s) from the d·flux Multiparameter Series. This manual contains all the required information to safely and correctly install, commission, and operate this device. You also find information on Product identification, storage, service, troubleshooting, communication details, specifications, and drawings.
  • Page 10: Other Symbols

    1.2.3 Other Symbols This symbol indicates that the text in relation to the proper recycling practices 1.3 Documentation 1.3.1 Standard Documentation Except for this advanced manual, the documentation available for this product is: Technical Datasheet  Manual PROFINET  Manual EtherCAT ®...
  • Page 11: Basic Safety Instructions

    Basic Safety instructions 2.1 Requirements for the Personnel The personnel for installation, commissioning, diagnostics, and maintenance must fulfil the following requirements: The installers and operators must be trained, qualified specialists.  Are authorized by the plant owner/operator  Are familiar with federal/national regulations ...
  • Page 12 Fittings Risk of injury if the process connection and sensor gland are opened under pressure. The process connection should only be opened in an unpressurized state. Flammable Gases and ATEX Ex Protection Please read the d·flux Multiparameter Safety Information Please observe the local safety regulations related to the operation of flammable gas when using our instrument and use appropriate material for the mechanical and electrical installation.
  • Page 13 Ground It is strongly recommended to have this device grounded. Oxygen service While we strive to produce clean instruments at our manufacturing facility with very low amount of residual hydrocarbons on its wetted parts, our instrument does not receive a specific cleaning treatment for oxygen applications during its production.
  • Page 14: Workplace Safety

    It meets general safety standards and legal requirements. It also complies with the EC and UKCA directives listed in the device-specific EC Declaration of Conformity. Sierra confirms this by affixing the CE and UKCE mark to the device.
  • Page 15: Product Description

    There is no direct relation between the digits in this code and your instruments. You must contact Sierra to translate this POC code into the specifications of your instrument.
  • Page 16 Alarm, Warning and Diagnostic Features The d·flux series integrates advanced diagnostics, monitoring, and reporting of every part of its operation. The information is accessible via the Sierra Flow Connector App or Modbus.
  • Page 17: Real, Standardized And Normalized Flow

    Please define and mention these reference condition at the time of your order. The reference condition can also be changed via the Sierra Flow Connector App or via Modbus. Please note that reference condition relating to Normalized or Standardized volumetric flow are NOT the operating conditions.
  • Page 18: The Measurement Principle

    3.6 The measurement principle The Sierra d·flux is a differential pressure-based mass flow meter. It measures the differential pressure over a laminar flow element (LFE), the absolute pressure and the gas temperature. The electronics calculate the mass flow going through the meter.
  • Page 19: Block Diagram

    In this equation ���� is a constant factor that represents the geometry of the LFE. To bypass fabrication tolerances and reach the highest accuracy in flow measurement, the constant ���� gets The viscosity ���� and the density ���� are non-linear with P+T and are calculated every 10 determined during the calibration of the flow meter.
  • Page 20 Figure 3 d·flux mass flow controller (DFC)
  • Page 21: General Specifications

    3.8 General Specifications...
  • Page 24: Unit Overview

    3.9 Unit Overview 3.9.1 Front View Figure 4 Front view d·flux...
  • Page 25: Back View

    3.9.2 Back View Data label Process connection outlet Flow direction (G 1” BSPP) Serial number Quality sticker Metric mounting Imperial mounting Figure 4 Back view d·flux...
  • Page 26: Unpacking And Product Identification

    The unit model and configuration are defined in the POC (Product Order Code). The POC can be translated by your Sierra contact. Please note that the factory configuration can for many variables be changed by using our Sierra Flow Connector App.
  • Page 27: Instrument Label

    4.4 Instrument Label If you communicate by e-mail to us about an instrument, please take a picture of this label and include that in your e-mail. As a bare minimum please provide us with the serial number of your unit. Product name Unique product number Product identification...
  • Page 28: Storage, Transport And Packing

    Storage, Transport and Packing 5.1 Storage Conditions Observe the following notes for storage: Store in the original packaging to ensure protection from shock.  Do not remove protective covers or protective caps installed on process connections.  They prevent mechanical damage to the sealing surfaces and contamination in the ...
  • Page 29: Mechanical Installation

    Mechanical Installation The following four steps will guide you through the installation of your meter or controller. Please follow the sequence to ensure safe, error-free operation During installation, make sure that all power, electrical signals as well as the gas supply are disconnected! Please take the ambient conditions into account when installing the unit The unit is IP54 rated unless it is supplied with ethernet communication.
  • Page 30: Installation Conditions

    6.1 Installation conditions 6.1.1 Mounting No specific brackets are supplied or in general required to mount your flow device. We always recommend mounting the units on a flat surface. Below and on the drawings in Appendix 17.1 you find the mounting screw details. The unit must be mounted on a solid surface using suitable steel screws.
  • Page 31: Flow Direction

    6.1.6 Pressure Drop for d·flux meter (DFM) For an exact value of the pressure drop for your specific application it is recommended to contact your Sierra contact. On special request and after evaluation of your application we could consider supplying the unit without...
  • Page 32: Process Connections

    Measured pressure drop when venting to atmosphere at maximum flow (air): Inlet filter No inlet filter LFE1400 410 mbar 325 mbar LFE1000 380 mbar 340 mbar LFE700 360 mbar 335 mbar LFE500 340 mbar 320 mbar Table 1: Measured pressure drop when venting to atmosphere 6.2 Process Connections The d·flux has a G 1”...
  • Page 33: Mounting The Fittings

    10D (10x pipe diameter). 6.2.1 Mounting the fittings All the connections and fittings supplied by Sierra are sealed with an O-ring. If you ordered fittings with the unit, they are mounted, and leak tested. If supplied separately (or you remove the supplied fittings) you must mount, and leak test the connections yourself.
  • Page 34: Inlet Filter

    Check for any leaks before commissioning the devices (See chapter 10). 6.2.2 Inlet filter Sierra supplies the d·flux with an inlet filter mounted inside the flow meter. It is a fine-mesh sieve (50 microns) which is mounted at the inlet of the device.
  • Page 35: Post-Mounting Check

    Tri-Clamp fittings consist of two ferrule ends, a seal and a clamp, assembled as shown: Figure 9: Assembly Tri-Clamp fitting Sierra only supplied the flange mounted to the flow meter. The seal and the clamp need to purchase separately and installed according to the manufacturer’s instruction. 6.3 Post-mounting Check...
  • Page 36: Electrical Connections

    Electrical connections The electronic connections are located on the top of the unit. You either have the standard units with Modbus and analog output or the advanced unit with the Ethernet communication (EtherCAT , PROFINET or Ethernet IP) ® Please note that the unit is only IP54 protects if you use the correct electrical connectors and plug off any un-used connectors (M8-4P cap supplied with the unit).
  • Page 37: Connections

    7.2 Connections First remove the power supply before you connect/disconnect any of the plugs/terminals. The d·flux has two electrical connectors: M8-4 pin male plug: This connector can be used as power supply, and it gives access to the mosfet (Open collector) pin that can be switched on/off over the digital communication.
  • Page 38: Profinet And Ethercat® Connections

    7.2.1 PROFINET and EtherCAT® Connections Figure 9: Top view connectors d·flux with EtherCAT® 7.3 Electrical Specifications Only persons with the appropriate training are authorised to connect the unit. Improper connection of the unit can have serious consequences for persons, the unit or the environment, which can lead to injuries, damage or worse! Please verify all electrical specification below and verify that it meets your requirements and is compatible with your system: Power supply meter (DFM)
  • Page 39 EtherCAT : IEC standard IEC61158 / Endianness: little ® Configuration interface Bluetooth 4.0 (free Sierra Flow Connector App available ® from Google Play store) (See Chapter 9) Valve Mode With this input you can control the current valve state. By applying this input will override the software control.
  • Page 40: Connecting Schematic Examples

    (Optional) ® ® For a simple function check, we recommend using the Sierra Flow Connector App. For details on analog and digital communication, please refer to the corresponding chapters. 7.4 Connecting Schematic Examples Determine which electrical connections you will use and identify these in the connection diagram.
  • Page 41: Modbus To Plc Schematic

    7.4.2 Modbus to PLC Schematic Power Supply Shield Shield / GND Analog GND GND (Supply) Supply GND 15 – 36Vdc Supply Power Analog Out Voltage Analog in MFC Valve Mode Analog Out Current Modbus / RS485 (A) Modbus A Modbus / RS485 (B) Modbus B Figure 11: Electrical connection diagram Modbus with power supply to D9-sub connector 7.4.3 Modbus (more than one Device) to PLC Schematic...
  • Page 42: Mosfet I/O Switch To Plc Schematic

    7.4.4 Mosfet I/O Switch to PLC Schematic Power Supply Shield Shield / GND 15 – 36Vdc Supply Power GND (Supply) Not Connected Supply GND OC Switch Switches output to supply GND Figure 13: Electrical connection Mosfet I/O Switch when using power of device Power Supply (OC) 15 –...
  • Page 43: Functions

    Configuration The adjustments for this unit can simply be made with the Sierra Flow Connector App. We explain the features and functions in the following order as made accessible in the Sierra Flow Connector App.
  • Page 44: Profiles

    Profiles A profile is set of user predefined settings stored in the EEPROM of the unit. You can program and store 15 profiles (See chapter 9.1.4.1). The concept behind it is that you have a different profile for every application you use the unit for.
  • Page 45: Settings In A Profile

    In the next sub-chapters, we discuss the possible functions and its settings related to a profile. These settings can be adjusted by the Sierra Flow Connector App or through digital communication. You must select the profile you want to make changes to. Please note that the variables you select and changes in the profiles are stored in the EEPROM of the unit and will be remembered by the unit if in the future you recall that profile, even after a power cycle.
  • Page 46: Engineering Units

    8.2.2 Engineering units You can select different engineering units. The totalizer can be a different engineering unit than the flow indication. For instance, Flow: ln/min and Totalizer: kg Below are the engineering units you can select in the d·flux. Please note that many of the units are duplicates but written ina different way (e.g.
  • Page 47: Operating Ranges

    8.2.3 Operating For Ranges As a user you can only adjust the “user settings”. The user settings are limited by the factory settings. Example, if the factory full scale is 1400 ln/min than the user full scale can never be set to a higher value.
  • Page 48 A flow lower than the user low cut-off point is no longer measured by the instrument (Neither digital nor analog). The user low cut-off can be set in the profile in the app (Advance mode only) or through any digital communication from 0 to 10% of the user minimum flow. For meters it is recommended to make this value 0%.
  • Page 49 8.2.3.5 Controllers: setpoint and high cut-off The user high cut-off is the maximum value you can give a setpoint for above the UFS at which the unit will operate. When you set a setpoint above this user high cut-off you get an “Out of bound”...
  • Page 50 PID settings are f.i. valve oscillation, overshoot or extremely long response time. You can, if required, adjust these PID values to optimize the unit for your process with the Sierra Flow Connector App. You can find these under profile on the bottom of the screen (Each profile...
  • Page 51: Totalizers

    Volt signals Figure 21 Read/set screen from connect app In the set/read menu in the Sierra Flow Connector App (See chapter 9.1.5.2) you can also: Reset Totalizer: If you press the reset totalizer button you reset the totalizer of the than selected...
  • Page 52: Tare And Autotare

    "Tare” or “Autotare”. Contact your Sierra contact for additional information. 8.4 Signal filter As a user you can select from 3 different signal filter types and adjust the strength of the filter. Figure 22 Filter menu from the Sierra Flow Connector App...
  • Page 53: Overview Filter Effects

    We recommend to put the unit on automatic but in some specific cases you might like to optimize the filter. The filter options are: Moving Average (Also referred to as Boxcar filter)  Exponential Moving Average (EMA)  Moving Median ...
  • Page 54: Warnings And Errors

    There is an advanced and effective diagnostics system build in the d·flux where notifications inform the user about the status of this product. The status is locally indicated with a red LED on the units and a detailed status report can be obtained through the Sierra Flow Connector App (See chapter 9) Notifications are separated in “Warnings”...
  • Page 55: Default Warning Settings

    9.1.5.2. 8.5.1 Default Warning Settings The user can change the settings for the warnings in the warning settings menu of the Sierra Flow Connector App. (See chapter 9.1.5.2). You can adjust globally (valid for all warnings) or select a specific warning and adjust them individually.
  • Page 56: Individual Warning Settings And Actions

    8.5.2 Individual Warning Settings and Actions The previous chapter set the variables for all warnings. Below these settings you see the individual alarm settings and the ability to add an action to an activated warning. As example you can activate the I/O switch (mosfet) upon a warning.
  • Page 57: Mosfet I/O Contact

    There is one analog input for setting the setpoint of the controller. This input is available for DFC only. You can configure the input to be a voltage (Vdc) or a current (Idc) input through the Sierra Flow Connector App (See Chapter 9.1.2)
  • Page 58: Controller & Valve

    Controller & Valve 8.10 8.10.1 Setpoint Mode The setpoint mode determines which setpoint is followed. If you select “Automatic” that any change in setpoint from either any analog or digital input (including Bluetooth) will be followed. You can change this setting to either analog or digital in the Control App (See Chapter 9). If you have an electrically noisy surrounding, we recommend you set it on either analog or digital.
  • Page 59: Valve Purge

    With the Sierra Flow Connector App under “valve” (Select under Valve mode see Chapter 9). If you activate purge this way the purge will only last for the time you set in Sierra Flow Connector App under “valve” in “Valve Purge Duration” (in milliseconds).
  • Page 60: Valve Close

    With the Sierra Flow Connector App under “valve” (Select under Valve mode). If you actively purge this way the purge will only last for the time you set in Sierra Flow Connector App under “valve” in “Valve Purge Duration” (in milliseconds).
  • Page 61: Rotary Switch

    6: 19200 7: 38400 8: 57600 9: 115200 The baud rate can also be set by the digital communication (Including through the Sierra Flow Connector App) (See Chapter 9). You can choose from the following parity settings: None (Default) Even...
  • Page 62: Device Information

    Please note that the default setting for the modbus is 247, NONE, 9600bits/s but you can change it to your preference. Please note that in d·flux units supplied before Sept 2024 the default could be set to 247, EVEN, 9600bits/s. Device 8.12 Information...
  • Page 63: Communication

    Bluetooth® connection. The Modbus is 2 wire connection in the DB9 connector on top of the unit. If you want a quick connection to your local PC we recommend a Modbus to USB converter like the Sierra PN 328- 2112.
  • Page 64: Sierra Flow Connector App Settings

    Note: The distance between the unit and your phone should initially be 1 meter. Some phones can go up to 5 meters, but that is phone and environment depended. 9.1.2 Sierra Flow Connector App settings On the main page you find 3 horizontal lines in the top left corner of the app.
  • Page 65: Sierra App Updates

    9.1.3 Sierra App Updates The Sierra Flow Connector App will be updated on regular intervals. This will go fully automatically if you make no special setting in your phone. If you want to be informed about what is changing, please follow us on LinkedIn.
  • Page 66: Structure And Function Of The Operating Menu

    9.1.4 Structure and Function of The Operating Menu 9.1.4.1 Structure of The Operating Menu After you successfully connected your phone to the d·flux with Bluetooth® you see the home page with 13 icons (in basic mode). In advanced mode 3 additional icons are shown. Figure 32 Home screen for basic Figure 31 Home screen for advanced If you have a d·flux meter the “Valve Control”...
  • Page 67 In the graph menu you can see graphs of the flow pressure and gas temperature. You can select one of these graphs to fill the whole screen. By Pinching you can zoom in/out and by sliding move the graph vision. The time base can be selected from 10 sec to 1 hour in the preferences menu (Go to main screen to go to preferences, see chapter 9.1.2) Under each graph you see a 3-button menu.
  • Page 68 Analog output and input settings. The analog output is fully configurable through this menu option you can adjust the mA and Vdc output (Available simultaneously over the D9 connector) More information in chapter 8.7. The analog input (Only for Mass flow controllers) is fully configurable through this menu option you can adjust the mA or Vdc input.
  • Page 69: Access To The Operating Menu Via Sierra Flow Connector App

    With this icon you link to the advanced manual of the d·flux. It will be downloaded to your phone. 9.1.5 Access to the operating menu via Sierra Flow Connector App 9.1.5.1 Operational interface Once you gained access to the correct menu, you will find the screens intuitive. Beside this you find a lot of info icons that look like this: By pushing this icon you get more information about specific functions.
  • Page 70: Password

    4 digit code. You can however still log it through the Sierra Flow Connector App (Bluetooth®) and read the values of the settings. The password is activated when you receive the unit. The password by default is 0000.
  • Page 71 9.2.1.2 API - Application Programmers Interface API means Application Programmer’s Interface: Historically that is the function interface offered by an operating system to application developers (that build applications running on that operating system). In our case the «application programmer» is the customer that wants to build applications with our instruments.
  • Page 72: Overview Of Registers

    9.2.2 Overview of Registers Main Readings FLOW_VALUE 0x0000 1400* ln/min* VOLUMETRIC_VALUE 0x000A 1400 l/min TEMP_VALUE 0x0002 -20* °C* PRESSURE_VALUE 0x0006 bar a* DENSITY_VALUE 0x0008 2000 kg/m3* TOTALIZER_VALUE 0x0004 infinity WARNING_GLOBAL_STATUS 0x0301 0xFFFF Maintenance RESET 0x0600 1536 WATCHDOG_SELECT 0x0620 1568 WATCHDOG_TRIGGER 0x0621 1569 Profile Editing...
  • Page 73 Analog Output #0 - Voltage ANALOG_OUTPUT_0_RANGE 0x0261 32767 ANALOG_OUTPUT_0_READ 0x0262 0-10 ANALOG_OUTPUT_0_LOWER 0x026A ANALOG_OUTPUT_0_UPPER 0x026C ANALOG_OUTPUT_0_UNIT 0x026E STR<4> char Analog Output #1 - Current ANALOG_OUTPUT_1_RANGE 0x0271 -32768 ANALOG_OUTPUT_1_READ 0x0272 Apr-20 ANALOG_OUTPUT_1_LOWER 0x027A ANALOG_OUTPUT_1_UPPER 0x027C ANALOG_OUTPUT_1_UNIT 0x027E STR<4> char Analog Input #1 - Voltage ANALOG_INPUT_N_RANGE 0x0211 -32768...
  • Page 74 Bluetooth® BLUETOOTH_PAIRING 0x0801 2049 PUSHBUTTON_SHORT 0x0700 1792 Device Information INFO_DEVICE_FUNCTION 0x0400 1024 0x81031A15 0xFFFFFFFF INFO_SERIAL 0x0402 1026 0x7866E810 0xFFFFFFFF INFO_TYPECODE_1 0x0404 1028 STR <12> DFM00000 char INFO_TYPECODE_2 0x040A 1035 STR <12> char INFO_VERSION_SOFTWARE 0x0410 1040 0x001 0xFFFF INFO_VERSION_BOOTLOADER 0x0411 1041 0x001 0xFFFF INFO_VERSION_HARDWARE...
  • Page 75: Detailed Information Of Modbus Registers

    Modbus Settings MODBUS_ADDR 0x0510 1296 0=None, 1=Even, MODBUS_PARITY 0x0511 1297 0 (NONE) 3=Mark, 4=Space 0=300, 1=600, 2=1200, 3=2400, 4=4800, MODBUS_BAUDRATE 0x0512 1298 5 (9600) Bits/s 5=9600, 6=19200, 7=38400, 8=57600, 9=115200 Depending on selected gas and units 9.2.3 Detailed information of Modbus registers 9.2.3.1 Main Readings FLOW_VALUE 0x0000...
  • Page 76 9.2.3.1.4 PRESSURE_VALUE: Current absolute pressure in the selected engineering unit Address hex Address dec Name Access Type Count default 0x0006 PRESSURE_VALUE Current pressure of gas in the engineering unit selected 9.2.3.1.5 DENSITY_VALUE: Current gas density in kg/m3 Address hex Address dec Name Access Type...
  • Page 77: Profile Editing

    9.2.3.2 Maintenance RESET 0x600 1536 WATCHDOG_SELECT 0x620 1568 WATCHDOG_TRIGGER 0x621 1569 9.2.3.2.1 RESET: Reset device Address hex Address dec Name Access Type Count default 0x0600 1536 RESET Writing 0xDEAD to this register resets the device. 9.2.3.2.2 WATCHDOG_SELECT: Select trigger source for watchdog Address hex Address dec Name...
  • Page 78 9.2.3.3.1 FLOW_UNIT_SELECT: Flow unit selection of active profile Address hex Address dec Name Access Type Count default 0x0052 FLOW_UNIT_SELECT Reading this register returns the current active flow unit by index number (First number is zero). Writing the register sets the current active flow unit by index. If the index written is invalid the current active flow unit does not change.
  • Page 79 9.2.3.3.2 TEMP_UNIT_SELECT: Temperature unit selection of selected profile Address hex Address dec Name Access Type Count default 0x0062 TEMP_UNIT_SELECT Reading this register returns the active temperature unit by index (First number is zero) Writing the register sets the current active temperature unit by index. If the index written is invalid the current active temperature unit does not change.
  • Page 80 9.2.3.3.4 TOTALIZER_UNIT_SELECT: Totalizer unit selection of selected profile Address hex Address dec Name Access Type Count default 0x0082 TOTALIZER_UNIT_SELECT Reading this register returns the current active totalizer unit by index number. (First number is zero) Writing the register sets the current active totalizer unit by index. If the index written is invalid the current active totalizer unit does not change.
  • Page 81: Profile Configuration

    9.2.3.3.6 REFERENCE_PRESSURE: Reference Pressure for "Standard" Unit Calculation Address hex Address dec Name Access Type Count default 0x00D2 REFERENCE_PRESSURE Reading this register returns the reference ambient pressure in the current selected pressure engineering unit. This setting is only valid for the active profile which is being edited. Writing this register sets the reference pressure in the current selected pressure engineering unit.
  • Page 82 9.2.3.4.1 PROFILE_SELECT: Activates Profile you want to use Address hex Address dec Name Access Type Count default 0x0032 PROFILE_SELECT Reading this register returns the current active profile index (First number is zero). Writing the register changes the current active profile. Writing 0 selects the first profile, writing 1 selects the second profile and so on.
  • Page 83 Address hex Address dec Name Access Type Count default 0x0054 FLOW_UNIT_NAME <16> Reading this register returns the name of the current selected unit. Any read request must target the base address of this register and is rejected otherwise. 9.2.3.4.7 TEMP_UNIT_SELECT: Temperature unit select in active profile (EEPROM and RAM) Address hex Address dec Name...
  • Page 84 9.2.3.4.11 TOTALIZER_UNIT_SELECT: Totalizer unit select in active profile (EEPROM and RAM) Address hex Address dec Name Access Type Count default 0x0082 TOTALIZER_UNIT_SELECT Reading this register returns the current active totalizer unit by index (First number is zero). Writing the register sets the current active totalizer unit by index. If the index written is invalid the current active totalizer unit does not change.
  • Page 85 9.2.3.4.15 RANGE_DYNAMIC: Dynamic of range which is selected and in use for editing Address hex Address dec Name Access Type Count default 0x00BA RANGE_DYNAMIC Reading this register returns the effective dynamic value. Writing this register adjusts the minimum value of the current range type in use to realize the given dynamic value. This register reads +Infinity in the following special cases: Maximum value (RANGE_MAX) is +Infinity ...
  • Page 86 Writing this register enables or disables auto dynamic. It is device specific if auto dynamic is available. Writing zero disables auto dynamic and writing non-zero enables auto dynamic. Writing the register has immediate effect and the state is also stored in persistent memory. Reading the register returns the current state (0 or 1).
  • Page 87 9.2.3.5.3 ANALOG_OUTPUT_0_LOWER: Max Value of Voltage Range Address hex Address dec Name Access Type Count default 0x026A ANALOG_OUTPUT_0_LOWER Reading this register returns the lower limit of the selected range. Writing this register is ignored if the selected range is not the custom range. If the selected range is the custom range writing this register has an immediate effect and the value is stored in persistent memory.
  • Page 88 9.2.3.6.2 ANALOG_OUTPUT_1_READ: Value of Analog Current Address hex Address dec Name Access Type Count default 0x0272 ANALOG_OUTPUT_1_READ When operating in automatic or manual mode reading this register returns the value that is currently driven at the analog output. 9.2.3.6.3 ANALOG_OUTPUT_1_LOWER: Max Value of Current Range Address hex Address dec Name...
  • Page 89 9.2.3.7.1 ANALOG_INPUT_N_RANGE Address hex Address dec Name Access Type Count default 0x0211 ANALOG_INPUT_N_RANGE Selects the analog range to be used. The analog range behaves proportional to the flow range. Depending on the type of the selected analog input (see ANALOG_INPUT_TYPE) the following ranges are valid (X = can be used): Range Effect...
  • Page 90 9.2.3.7.5 ANALOG_INPUT_N_UNIT Address hex Address dec Name Access Type Count default 0x021E ANALOG_INPUT_N_UNIT Reading this register returns the unit of the analog input signal as a string. The unit depends on the device type and the selected range. Voltage output: V Current output: mA 9.2.3.8 CONTROLLER 0x10...
  • Page 91 9.2.3.8.3 SETPOINT_RAMPING_TIME_MS Address hex Address dec Name Access Type Count default 0x0104 SETPOINT_RAMPING_TIME_MS Setpoint ramping can be used to protect the process from rapid changes in the setpoint. The figure illustrates how the ramping is applied to the user setpoint depending on the selected ramping mode (see SETPOINT_RAMPING_MODE): Reading this register returns the ramping time in milli seconds.
  • Page 92 9.2.3.8.5 SETPOINT_AUTOSAVE Address hex Address dec Name Access Type Count default 0x0107 SETPOINT_AUTOSAVE Reading this register returns current autosave setting: If autosave feature is disabled reading the register returns zero (0)  If autosave feature is enabled reading the register returns a non-zero value (1) ...
  • Page 93 9.2.3.8.7 CONTROLLER_PARAMETER Address hex Address dec Name Access Type Count default 0x0116 CONTROLLER_PARAMETER Currently used PID values in the control loop [P, I, D] The PID values depend on the currently selected parameter set. 9.2.3.8.8 CONTROLLER_OFFSET Address hex Address dec Name Access Type...
  • Page 94 Test if you have an immediate start of the flow when you set the setpoint to 20% of  full-scale flow If the flow overshoots decrease the CONTROLLER_OFFSET value. 9.2.3.9 TARE TARE_NULL 0x0902 2306 TARE_STATUS 0x0903 2307 TARE_DURATION 0x0904 2308 1000 65536 TARE_DELAY...
  • Page 95 9.2.3.9.3 TARE_DURATION Address hex Address dec Name Access Type Count default 0x0904 2308 TARE_DURATION Length (in ms) of pressure measurement during auto-tare (in ms). The value written is limited internally to the lowest duration possible. 9.2.3.9.4 TARE_DELAY Address hex Address dec Name Access Type...
  • Page 96 9.2.3.10 Valve VALVE_MODE 0x0160 VALVE_STATUS 0x0161 VALVE_LOAD 0x0162 VALVE_ACTION 0x0168 VALVE_VALUE 0x0164 VALVE_PURGE_TIME_MS 0x0174 5000 65536 VALVE_FEATURE 0x0176 VALVE_DRIVER 0x0177 VALVE_N_FREQUENCY 0x0178 7000 50000 9.2.3.10.1 VALVE_MODE Address hex Address dec Name Access Type Count default 0x0160 VALVE_MODE Reading this register returns the current mode of the valve. The following modes are available: Index Mode...
  • Page 97 reads 1 while device operates in “valve protection” mode. Status value reads 2 while valve is forced by hardware signal to open or close. If status is unequal zero (e.g. valve is forced by hardware) warning #13 (Automatic valve control offline) gets active. Note: If the valve status is “Forced”...
  • Page 98 device jumps back into previous mode selected by VALVE_MODE register. Valve close and valve open The valve is held closed (opened) until one of the following occurs: - Action is aborted (VALVE_ACTION = 0) or a new action is triggered - Measurement state is left (e.g.
  • Page 99 Reading this register returns the valve purge duration in milli seconds. Please note that the purge function can create huge unexpected high flows. 9.2.3.10.7 VALVE_FEATURE Address hex Address dec Name Access Type Count default 0x0176 VALVE_FEATURE Reading this register returns the supported features of the valve. The following features are available: Bit # Feature...
  • Page 100 9.2.3.10.8 VALVE_DRIVER Address hex Address dec Name Access Type Count default 0x0177 VALVE_DRIVER The figure illustrates the types of valve control. Valve Control Linear Control 10 kHz PWM Control 12 kHz Custom this register stores the selected valve control type in persistent memory. The following Writing values are accepted: Value...
  • Page 101 9.2.3.11 Bluetooth ® BLUETOOTH_PAIRING 0x0801 402050 PUSHBUTTON_SHORT 0x0700 401793 9.2.3.11.1 BLUETOOTH_PAIRING: Bluetooth Pairing Mode Status ® Address hex Address dec Name Access Type Count default 0x0801 2049 BLUETOOTH_PAIRING Reading this register returns whether the Bluetooth module is currently paired with another ®...
  • Page 102 9.2.3.12 Device Information INFO_DEVICE_FUNCTION 0x0400 401025 0x81031A15 0xFFFFFFFF INFO_SERIAL 0x0402 401027 0x7866E810 0xFFFFFFFF INFO_TYPECODE_1 0x0404 401029 STR<12> DFM00000 char INFO_TYPECODE_2 0x040A 401035 STR <12> char INFO_VERSION_SOFTWARE 0x0410 401041 0x001 0xFFFF INFO_VERSION_BOOTLOADER 0x0411 401042 0x001 0xFFFF INFO_VERSION_HARDWARE 0x0412 401043 0x002 0xFFFF INFO_VERSION_MECHANICS 0x0413 401044...
  • Page 103 9.2.3.12.2 INFO_SERIAL: Serial number of device Address hex Address dec Name Access Type Count default 0x0402 1026 INFO_SERIAL Reading this register returns the serial number of the device. 9.2.3.12.3 INFO_TYPECODE_1: Type code of device part 1 Address hex Address dec Name Access Type...
  • Page 104 9.2.3.13 Filtering OUTSTAGE_0_ENABLE 0x0F00 403841 OUTSTAGE_0_SELECT 0x0F01 403842 OUTSTAGE_0_RESIZE 0x0F02 403843 0xFFFF Samples OUTSTAGE_0_CONFIG 0x0F03 403844 OUTSTAGE_0_RESET 0x0F04 403845 1400 ln/min OUTSTAGE_0_DECIMATOR 0x0F06 403847 The following registers are only related to the digital flow measurement More details on the filters in chapter Outstage refers to the filtering of the digital output signal.
  • Page 105 9.2.3.13.3 OUTSTAGE_0_RESIZE: Number of elements for flow filtering Address hex Address dec Name Access Type Count default 0x0F02 3842 OUTSTAGE_0_RESIZE Writing the register resizes the output buffer capacity (in number of elements) to the specified value. The output buffer stores filter output values until being read. They are removed from buffer when corresponding value register is read.
  • Page 106 9.2.3.13.6 OUTSTAGE_0_DECIMATOR: Smoothens the filter value Address hex Address dec Name Access Type Count default 0x0F06 3846 OUTSTAGE_0_DECIMATOR Writing this registers enables and configures the decimation filter. The decimation filter is used to reduce the sampling rate before samples are being processed by the DFU stage. Increasing the value increases smoothing performance but decreases reaction time.
  • Page 107 9.2.3.14.2 PUSHBUTTON_LONG: Function of push button long press Address hex Address dec Name Access Type Count default 0x0701 1793 PUSHBUTTON_LONG This register holds the index of pushbutton long press function. Writing this register will have an immediate effect. Additionally, the new value will be written to persistent memory. The following functions are available: Index Function...
  • Page 108 9.2.3.15.2 SWITCH_MODE: OC switch mode (off or manual) Address hex Address dec Name Access Type Count default 0x0342 SWITCH_MODE Reading this register returns the current mode of the open collector switch. The following modes are available: Index Mode Description The switch cannot be controlled and is floating. Manual The switch can be operated by SWITCH_VALUE or “Safety Features”...
  • Page 109 9.2.3.16 Totalizer TOTALIZER_RESET 0x1F10 7952 0xFF TOTALIZER_AUTOZERO 0x1F20 7968 0xFF TOTALIZER_N_RESET 0x1F50 8016 TOTALIZER_VALUE 0x0004 infinity TOTALIZER_STATE 0x1F11 7953 9.2.3.16.1 TOTALIZER_RESET: Reset totalizers 0-15 Address hex Address dec Name Access Type Count default 0x1F10 7952 TOTALIZER_RESET Writing this register can resets multiple totalizers at once via a bit field from 0 to 15. Profile/Totalizer …...
  • Page 110 Reading this register returns the current state of auto zero function. Profile “0” totalizer cannot be reset by default. Profile “1-15” totalizers can be reset by default. 9.2.3.16.3 TOTALIZER_N_RESET: Resets active totalizer Address hex Address dec Name Access Type Count default 0x1F50 8016...
  • Page 111 9.2.3.18 Warnings and Errors WARNING_GLOBAL_STATUS 0x0301 0xFFFF WARNING_GLOBAL_MODE 0x0303 WARNING_GLOBAL_RESET 0x0304 ERROR_GLOBAL_STATUS 0x0321 0xFFFF WARNING_GLOBAL_OFF 0x030A 9.2.3.18.1 WARNING_GLOBAL_STATUS: Which alarms are active Address hex Address dec Name Access Type Count default 0x0301 WARNING_GLOBAL_STATUS This register shows which warnings are currently active. Warnings are reported in a bit mask. 9.2.3.1.7 WARNING_GLOBAL_STATUS: Available warnings For details see Chapter 9.2.3.18.2 WARNING_GLOBAL_MODE: How warnings are handled...
  • Page 112 In automatic mode the LED and “WARNING_GLOBAL_STATUS” follows the status for rising and falling edges. LED active LED not active Status active Status not active Process interaction Process interaction Process interaction Process interaction Process interaction Process interaction Sticky: In sticky mode the LED and “WARNING_GLOBAL_STATUS” follows the status for rising edges only.
  • Page 113 9.2.3.18.3 WARNING_GLOBAL_RESET: Reset global warnings Address hex Address dec Name Access Type Count default 0x0304 WARNING_GLOBAL_RESET Each bit in this register is associated with a warning reset. * Available on flow controller devices only Writing this register only has an effect if LED mode is set to sticky. Writing a 1 bit resets the corresponding bit for the LED.
  • Page 114: Modbus Settings

    9.2.3.18.5 WARNING_GLOBAL_OFF: Turns off the reporting of global warnings Address hex Address dec Name Access Type Count default 0x030A WARNING_GLOBAL_OFF Each bit in this register is associated with a warning. Writing a 1 bit sets the mode of corresponding LED to off. Writing a 0 bit has no effect.
  • Page 115 Rotary Switch: MSN (Most Significant Number) and LSN (Least Significant Number) are used to build two bytes that build the “Node Number”. If for example the MSN is set to 0xE and the LSN is set to 0x2 this would result in the slave address 0xE2 (226 in decimal).
  • Page 116 9.2.3.19.2 MODBUS_PARITY: Modbus Parity Address hex Address dec Name Access Type Count default 0x0511 1297 MODBUS_PARITY NONE Writing this register sets the parity setting. This can be one of the following values: Index Parity None Even Mark (always 1) Space (always 0) Writing an invalid value has no effect.
  • Page 117: Ethercat

    PROFINET is an optional digital communication interface. PROFINET has a separate dedicated manual. See www.sierrainstruments.com. 9.5 Ethernet IP 9.5.1 Intro Ethernet IP is an optional digital communication interface that will be available later in 2025. Please contact us on www.sierrainstruments.com. or through your local Sierra contact.
  • Page 118 When you apply power the green power LED on the unit will flash 3-4 times. If there are no red LEDs showing on the unit, the unit is ready for use. We suggest you connect your unit to your Sierra Flow Connector App (See 9.1) and verify if the correct setting is selected for your application.
  • Page 119 The tare button van be found in the Readout menu. You will be informed about the consequences and need to confirm before the tare takes place. See Push button: The push button is by default not configured to tare the flow meter. Change configuration with the Sierra Flow Connector App or via Modbus.
  • Page 120: Configuring The Analog Output

    100% closed than the meter part of the MFC will be under (or close to) operating pressure. An ideal situation to tare the unit. The units can do this automatically if that option is activated in the Sierra Flow Connector App (Under Menu Valve see chapter or through digital communication (see 8.3.1)
  • Page 121: Diagnostics And Troubleshooting

    Diagnostics and troubleshooting 11.1 Filter Cleaning The unit is standard provided with a 50-micron inlet filter that partly also serves as a flow conditioner. This is critical since the LFE spacing is 0.15 mm. The filter cannot be removed or replaced by the user.
  • Page 122 Normal: The green LED is on while the other LEDs are switched off. Under operation: If the device is operating mode each LED behaves as follows: Green: The green LED indicates the current state of the device. State Function Fast Flashing Measurement is disabled Slow Flashing Control is not automatic (only available for controllers)
  • Page 123: General Troubleshooting

    Device parameters Check the following: Correct setting of the analog output Compare the values  on the type code with the digital setting via Sierra Flow Connector App or Modbus Control not stable Control parameters Based on user specific settings in the ordering process the PID parameters are set and checked by the factory accordingly.
  • Page 124: Repair And Service

    12.2 Sierra services Please contact Sierra, if you require service or have questions about your flow meter. If you like to return units, please go to Chapter 14 Return units for Service (RMA)
  • Page 125: Maintenance

    Maintenance 13.1 Maintenance tasks 13.1.1 Firmware update The is constantly improved and additional features are added. We publish these improvements and it is very easy to install any improved firmware on your unit. The unit has a so-called boot loader and all you must do is to connect the unit over Modbus (Converter from Modbus to a USB connector available as accessories on our website.
  • Page 126: Measuring And Test Equipment

    13.2 Measuring and test equipment Please only use a certified DVM meter to verify the voltage and milliamp signal...
  • Page 127 Return units for service (RMA) 14.1 Contact the factory In case you need to return the unit to the factory, please go to https://www.sierrainstruments.com/rma and follow the instructions. If you have any questions, please contact our service department for instructions. https://www.sierrainstruments.com/techsupport/techsupport.html Please ensure that if you return the unit to use the original packaging or make sure that the units are extremely well packed.
  • Page 128: Removing The Measuring Device

    Disposal 15.1 Removing the measuring device Please remove and power and ensure that gas supply is disconnected. Ensure the pressure inside the flow meter is 0 bar g and in case of dangerous or aggressive gases flush the flow meter for at least 24 hours with clean, inert gas. 15.2 Disposing of the measuring device The units contain no batteries or dangerous materials.
  • Page 129: Technical Data

    Technical data Chapter 3.8 General specifications...
  • Page 130: Dimensional Drawings

    Appendix 17.1 Dimensional drawings 17.1.1 Dimensional drawings in mm and inches...
  • Page 132 Valve can be mounted on the outlet of on the inlet. Dimensions with fittings: Face-to-face 50.5 Tri-clamp: 196 mm End-to-end 1” Compression fittings: 234 mm (Face-to-Face) End-to-end 1” Compression fittings: 172 mm (Tube-to-Tube) End-to-end 1” to ½” Reducer: 172 mm If additional information is needed, please consult your sales partner.
  • Page 133: Wetted Materials

    Warning: A process related failure (See 8.5)  Error: A product related failure (See 8.5)  MFM: Mass Flow Meter  MFC: Mass Flow Controller  DFM: d·flux meter (=MFM)  DFC: d·flux controller (=MFC)  17.3 Wetted materials Instrument d·flux Gerät Body...
  • Page 134 17.4 Type code overview...
  • Page 136: Overview Default Settings

    17.5 Overview default settings See Modbus overview table in chapter 9.2.2 17.6 Warranty Warranty for the d·flux product line extends to material and manufacturing defects only. Maximum warranty covers product replacement free of charge. The following causes of faults/damage are not covered under warranty: Use outside the operating limits ...
  • Page 137: Contamination Statement

    24/09/2024 V2.0 V1.1 1.08 After release 1.08 firmware (Main change default “NONE” parity) Fixed links, removed Contamination statement, added website link to 27/09/2024 V2.1 V2.0 1.08 Sierra Flow Connector App, made copyright from 22 to 24, increase to version V2.1...
  • Page 138 17.10 Trademarks Windows Windows is a registered trademark of Microsoft Corporation in the United States and other countries. EtherCAT EtherCAT is a registered trademark and patented technology licensed by Beckhoff Automation GmbH, Germany. MODBUS MODBUS is a registered trademark of Schneider Electric USA, Inc. Ethernet/IP Ethernet/IP is a trademark of ODVA, Inc.
  • Page 139 Index Autotare, 17, 52, 120 Normalized, 17 PID, 15, 43, 50, 51, 93, 96, 123 Block diagram, 19 Bluetooth®, 16, 39, 40, 57, 63, 64, 66, 70, 77, 101, 102, Power, 13 106, 107, 113, 114, 122 Pressure drop, 31 Boot-mode, 125 Profiles, 44, 66, 118 cleaning, 33, 34, 35, 121, 125...

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