Burkert 8756 Series Operating Instructions Manual
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Burkert 8756 Series Operating Instructions Manual

Mass flow meter / mass flow controller for liquids
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Type 8756
büS / CANopen - Analogue
Mass Flow Meter / Mass Flow Controller for liquids
Operating Instructions

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Summary of Contents for Burkert 8756 Series

  • Page 1 Type 8756 büS / CANopen - Analogue Mass Flow Meter / Mass Flow Controller for liquids Operating Instructions...
  • Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous réserve de modifications techniques. © Bürkert SAS, 2020 - 2021 Operating Instructions 2107/02_EU-en 00573797 / Original EN...

  • Page 3: Table Of Contents

    Type 8756 Table of contents Product materials ............ 19 TABLE OF CONTENTS Dimensions, weight ............ 20 1 About this document .............  5 Fluid data .............. 20 Manufacturer.............. 5 Electrical data ............... 29 Used symbols .............. 5 5 Fluid connection ..............  33 Terms and abbreviations .......... 5 Safety instructions ............ 33 2 Safety instructions ..............
  • Page 4 Type 8756 Table of contents Commissioning procedure (MFC with proportional valve) Sterilising a product variant MFM with hot water.. 63 .................. 47 Sterilising a product variant MFM with steam .... 63 Commissioning procedure (MFC for modular actuator) 10 Troubleshooting..............  64 .................. 48 10.1 Problems shown by the product status indicator.. 64 8 Setting and operation ............

  • Page 5: About This Document

    ▪ Contact the Bürkert sales office for any questions. Warns of property damage that can damage the product or Further information concerning the product at the installation. country.burkert.com. Indicates important additional information, tips and recom- Manufacturer mendations. Bürkert Fluid Control Systems Christian-Bürkert-Str.

  • Page 6: Safety Instructions

    Type 8756 Safety instructions Product Type 8756 SAFETY INSTRUCTIONS ▪ Mass Flow Meter (MFM) büS/CANopen Warranty ▪ Mass Flow Meter (MFM) Analogue The warranty is conditional on compliant use of the product in ▪ Mass Flow Controller (MFC) büS/CANopen with observance of the operating conditions.

  • Page 7: General Safety Information

    Refer safety regulations for electrical equipment. to the data sheet of the product on our homepage: country.burkert.com. Only use the product for fluids that are compatible with the product materials. Do not make any modifications to the product and do not sub- ject the product to mechanical stress.

  • Page 8: Product Description

    Type 8756 Product description Protect the installation and the product from accidental actu- PRODUCT DESCRIPTION ation. Only trained personnel may perform the installation work and Design the maintenance work. 3.1.1 Mass Flow Meter After an interruption in the electrical supply or in the fluid sup- ply, ensure a controlled restart of the process.
  • Page 9 Type 8756 Product description 3.1.2 Mass Flow Controller with pump Product variant büS/CANopen: not used Electrical connection, 5-pin M12 male connector, A coding Possible fluid connections: ▪ G-internal-threaded fluid connections according to DIN ISO228/1 ▪ NPT-internal-threaded fluid connections according to ASME/ ANSI B 1.20.1 ▪...
  • Page 10 Type 8756 Product description 3.1.3 Mass Flow Controller with proportional Electrical connection, 5-pin M12 male connector, A coding valve Possible fluid connections: ▪ G-internal-threaded fluid connections according to DIN ISO228/1 ▪ NPT-internal-threaded fluid connections according to ASME/ ANSI B 1.20.1 ▪...
  • Page 11 Type 8756 Product description 3.1.4 Mass Flow Controller for modular Electrical connection, 5-pin M12 male connector, A coding actuator Possible fluid connections: ▪ G-internal-threaded fluid connections according to DIN ISO228/1 ▪ NPT-internal-threaded fluid connections according to ASME/ ANSI B 1.20.1 ▪...

  • Page 12: Product Status Indicator

    Type 8756 Product description Product status indicator Electrical connection, 5-pin M12 male connector, A coding Possible fluid connections: The product status indicator changes its colour based on the NAMUR recommendation NE 107 . ▪ G-internal-threaded fluid connections according to DIN ISO228/1 The colour of the product status indicator gives the following pieces of information: ▪...
  • Page 13 Type 8756 Product description Colour Colour Diagnostics event Colour Colour Diagnostics event code (for a code (for a PLC) PLC) Orange Check function Green The product is being worked on. Diagnostics are active and no diagnostics event has been generated. ▪...

  • Page 14: Markings

    Type 8756 Product description 3.3.2 Type label Markings 3.3.1 Calibration label 8756 24V ... 4W [4W] Mass Flow IP65 NEC Class 2 only 25.0 kg/h Flow Direction Pmax: 16 bar büS/CANopen Id: 00****** Ta= –10°C...+60°C S/N 1000 W41ME PS=100barg VAAg QC passed: __ .

  • Page 15: Memory Card

    To get a list of the 12 Ambient temperature stored data, refer to the Help for the Initiation file that can be downloaded from country.burkert.com. 13 Product variant büS /CANopen: communication interface ▪ If the inserted memory card is empty, then the product loads its 13 Product variant Analogue: input and output own data on the memory card.

  • Page 16: Actuator Is A Control Valve

    Type 8756 Product description ▪ the pump speed ▪ inlet pressure ▪ the fluid used ▪ ... ▪ the back pressure Actuator is a control valve The control valve is a direct-acting and normally-closed propor- tional valve. The control valve provides the sealing function when the following conditions are met: ▪...

  • Page 17: Technical Data

    Type 8756 Technical data TECHNICAL DATA IP-Code according IP65 to EN 60529 If the following conditions are met: Conformity ▪ Cables must be connected. The product complies with the EU directives according to the EU ▪ Mating connectors must be plugged in and declaration of conformity (if applicable).
  • Page 18 Type 8756 Technical data Fluid connections Seal material Operating ▪ Outlet pressure ▪ max. 10 bar pressure Tab. 4: Operating conditions of an MFC with pump ▪ Fluid connections with ex- ▪ metal max. 50 bar 4.2.3 Mass Flow Controller with proportional ternal-threaded vacuum fit- ▪...

  • Page 19: Product Materials

    Type 8756 Technical data Ambient humidity < 95%, non-condensing Fluid connections Seal material Operating pressure IP-Code according IP65 ▪ Fluid connections with ex- ▪ metal max. 50 bar to EN 60529 If the following conditions are met: ternal-threaded vacuum fit- ▪ FFKM ▪...

  • Page 20: Dimensions, Weight

    Type 8756 Technical data Product part Material Maximum dynamic viscosity 200 mPa.s Parts in contact Stainless steel 303, stainless steel 434, stain- Take the pressure loss into ac- with the fluid (MFC less steel 301 count. Refer to chapter: Pres- sure loss of an MFM [} 21] with proportional The material depends on the equipped pro- valve)
  • Page 21 Type 8756 Technical data Maximum measurement range 1:500 The measurement range is defined as the ratio of Qnominal of the product to Qmin. Qmin = 0.05 kg/h. Refer to figure MFM: Measurement range depend- ing on nominal flow rate [} 21] Repeatability ±0.1% of the measured value PLUS ±0.0007 kg/h 0.0007 kg/h = zero-point stabil-...
  • Page 22 Type 8756 Technical data ▪ the flow-rate value Type of liquids Liquids that are clean and ho- mogeneous ▪ the size of the product fluid connections Maximum particle size 10 μm ▪ the type of the product fluid connections ▪ the size of the product base block Minimum dynamic viscosity 0.3 mPa.s ▪...
  • Page 23 Type 8756 Technical data Measurement accuracy after ±0.2% of the measured value 1 minute warm-up time PLUS ±0.0014 kg/h. If Qmin < 0.3 kg/h, then the control ac- curacy can be lower. 0.0014 kg/h = zero-point stabil- Maximum measurement range 1:160 The measurement range is defined as the ratio of Qnominal of the product to Qmin.
  • Page 24 Type 8756 Technical data 4.5.5 Mass Flow Controller with proportional Repeatability for mass flow rate ±0.005 kg/l values higher than 1.5 kg/h valve Tab. 18: Density measurement Operating fluid Liquids Type of liquids Liquids that are clean and ho- 4.5.4 Pressure loss, MFC with pump mogeneous A Mass Flow Controller (MFC) with pump has a pressure loss that Maximum particle size...
  • Page 25 Type 8756 Technical data Maximum measurement range > 1:300 The measurement range is defined as the ratio of Qnominal of the product to Qmin. Qmin = 0.08 kg/h. Refer to figure with proportional valve: Meas- urement range depending on nominal flow rate [} 25] Settling time (t95%) <...
  • Page 26 Type 8756 Technical data 4.5.6 Pressure loss, MFC with proportional Temperature of the calibration 25 °C fluid valve Calibration pressure 4 bar ∆p [bar] 40 mPas 20 mPas 10mPas 5mPas 1 mPas Tab. 22: Calibration conditions Density range 0...5 kg/l 0.3 mPas Measurement accuracy for ±0.01 kg/l mass flow rate values higher than 1.5 kg/h...
  • Page 27 Type 8756 Technical data Calibration pressure 4 bar Repeatability ±0.1% of the measured value PLUS ±0.0007 kg/h Tab. 24: Calibration conditions 0.0007 kg/h = zero-point stabil- Density range 0...5 kg/l Measurement accuracy for ±0.01 kg/l Response time (t95%) < 300 ms mass flow rate values higher The response time depends on than 1.5 kg/h the operating fluid used Repeatability for mass flow rate...
  • Page 28 Type 8756 Technical data 4.5.8 Pressure loss of an MFC for modular Repeatability for mass flow rate ±0.5 °C values higher than 1.5 kg/h actuator Tab. 28: Temperature measurement An Mass Flow Controller (MFC) for modular actuator has a pres- sure loss that depends on the following parameters: ▪...

  • Page 29: Electrical Data

    Type 8756 Technical data Electrical data Maximum ratings 1 A, 30 V, 30 VA Tab. 31: Relay output, product variant Analogue 4.6.1 Mass Flow Meter 0/4...20 mA ▪ Maximum loop impedance: 600 Ω ATTENTION! ▪ Resolution: 20 μA ▶ For UL-certified components, only use limited power circuits 0...5/10 V ▪...
  • Page 30 Type 8756 Technical data 4.6.2 Mass Flow Controller with pump ▪ Typical power con- ▪ 16 W for water and at a flow rate of sumption 8 kg/h ATTENTION! Tab. 36: General electrical data, product variant Analogue ▶ For UL-certified components, only use limited power circuits of "NEC Class 2".
  • Page 31 Type 8756 Technical data 5...28 V to activate level 3 Communication interface büS and CANopen. The communica- tion type can be chosen with the Tab. 40: Digital input, product variant Analogue Bürkert Communicator software. Minimum temperature 75 °C Tab. 42: General electrical data, product variant büS/CANopen rating of the cable to be connected to the field Operating voltage...
  • Page 32 Type 8756 Technical data 4.6.4 Mass Flow Controller for modular 0...5/10 V ▪ Maximum current: 20 mA actuator ▪ Resolution: 10 mV ATTENTION! Tab. 45: Analogue output for the measured value, product variant Analogue ▶ For UL-certified components, only use limited power circuits of "NEC Class 2". 0/4...20 mA ▪...

  • Page 33: Fluid Connection

    Type 8756 Fluid connection FLUID CONNECTION Maximum ratings 1 A, 30 V, 30 VA Tab. 51: Relay output, product variant Analogue Safety instructions 0/4...20 mA ▪ Maximum loop impedance: 600 Ω DANGER! ▪ Resolution: 20 μA Risk of injury that is due to pressure in the installation or in the 0...5/10 V ▪...
  • Page 34 Type 8756 Fluid connection CAUTION! CAUTION! Risk of injury that is due to improper installation. Risk of injury that is due to leakage in an MFC with propor- tional valve. ▶ Only trained personnel can carry out the installation. Person- ▶...

  • Page 35: Installation Steps

    Type 8756 Fluid connection ATTENTION! Flow direction ▶ Avoid strong vibration that is due to the mechanical installa- tion. Installation steps Do the fluid installation into the pipe. Refer to chapter: Install- ation procedure [} 35] Do the electrical installation. Refer to chapter: Electrical con- Risk of product nection [} 37]...
  • Page 36 Type 8756 Fluid connection Obey the instructions that are given by the manufacturer of the 5.3.1 G1/8''-internal-threaded fluid fitting used. connections Obey the torques that are given by the manufacturer of the fit- Remove the protective cap that closes the threaded connec- ting used.

  • Page 37: Electrical Connection

    Operating Instructions "CANopen Network cable. configuration" at country.burkert.com. ▪ Product description file and object description for the related product Type (download from country.burkert.com). ▪ Product-specific help in the Bürkert Communicator software. ▪ büS-driver for LabVIEW on request. english...

  • Page 38: Wire The Product Variant Büs /Canopen

    ▶ Refer to the cabling guide that is available in English and Requirements for the correct operation of the product. German at country.burkert.com. ▶ Refer to the cabling guide that is available in English and To wire the product, you can use büS extension cables from German at country.burkert.com.
  • Page 39 Type 8756 Electrical connection Colour of the büS cable conductor Signal white CAN_H blue CAN_L Tab. 58: Signals of the büS cable conductors ATTENTION! M12 thread is internally connected to FE If you use your own mating female connector, then observe the following requirements for the correct operation of the Fig. 18: BüS /CANopen: Pin assignment, 5-pin M12 male con- product.

  • Page 40: Wire The Product Variant Analogue

    Type 8756 Electrical connection To wire the product, you can use mating female connectors from Bürkert. Refer to following table. Item Article number Straight 5-pin M12 female connector 772416 Bent 5-pin M12 female connector 772418 Tab. 59: Accessories: female connectors M12 thread is internally connected to FE ATTENTION! Fig. 19: BüS /CANopen: Pin assignment, 5-pin M12 male con- Requirements for the correct operation of the product.
  • Page 41 Type 8756 Electrical connection ATTENTION! 24 V Requirements for the correct operation of the product. ▶ Use a mating female connector with shield-connection trans- Not connected fer at the union nut. Analogue output for the measured value ▶ Use a mating male connector with shield-connection transfer Coding lug at the union nut.
  • Page 42 Type 8756 Electrical connection Screw the mating male connector to the 5-pin female con- nector, to the torque given by the manufacturer of the mating Set-point input male connector. Analogue output for the measured value Do the functional earthing of the product. Refer to chapter: Connect the functional earth [} 44] Coding lug Wire the mating male connector according to the pin assign-...
  • Page 43 Type 8756 Electrical connection To choose the function to be remotely triggered over the di- 6.4.2 Relay output gital input, use the Bürkert Communicator software. Only one The 5-pin M12 female connector has a relay output. of the available functions can be associated to the digital in- The relay switching of an MFM product variant can show the fol- put.

  • Page 44: Connect The Functional Earth

    Type 8756 Electrical connection The following table gives the events that are assigned by default to the relay output of the 5-pin M12 female connector of an MFM. M4 screw Output Default assignment Relay output Empty pipe detected Gas bubbles in the system Fig. 23: Location of the M4 screw for the connection of the func- Tab. 62: MFM: Default assignment of the relay output of the 5-pin tional earth...

  • Page 45: Commissioning

    Risk of injury that is due to the operating pressure. ▶ Make sure that the product operating-pressure is not higher than the operating pressure value on the product data-sheet. Find the data sheet on our homepage: country.burkert.com. Fig. 24: MFC for modular actuator: Pin assignment, 8-pin M12 fe- male connector...

  • Page 46: Commissioning Procedure (Mfm)

    Fill the pipe without damaging the pump (MFC with pump) the Initiation file that can be downloaded from [} 52]. country.burkert.com. Wire the product again as described in chapter Electrical con- If the inserted memory card is empty, then the product nection [} 37].

  • Page 47: Commissioning Procedure (Mfc With Proportional Valve)

    Optimise the the Initiation file that can be downloaded from closed-loop control parameters (MFC) [} 59] country.burkert.com. The product operates normally. If the inserted memory card is empty, then the product loads its own data on the memory card. Possible prob-...

  • Page 48: Commissioning Procedure (Mfc For Modular Actuator)

    If product-specific data is stored on the inserted memory card, then the product adopts the data. To get a list of the stored data at product delivery, refer to the Help for the Initiation file that can be downloaded from country.burkert.com. english...

  • Page 49: Setting And Operation

    Type 8756 Setting and operation SETTING AND OPERATION WARNING! Risk of injury that is due to escape of the fluid. Safety instructions Contact with the operating fluid, its reaction products and va- DANGER! pours can cause injuries. Risk of injury that is due to pressure in the installation or in the Inhaled vapours can be harmful.

  • Page 50: Functions

    Type 8756 Setting and operation If the product variant is an MFC with pump, then flush bubbles ATTENTION! from the pipe as described in chapter: Flush bubbles from the When the product is flushed, flushing fluid can remain in the pipe (MFC with pump) [} 51] product.
  • Page 51 Type 8756 Setting and operation The product status indicator flashes. Go to Actuator > Actuating variable Set 50% > wait for 5 seconds > set 0% > wait for 5 seconds. Go to Sensor > Parameter > Advanced > Limit on low cutoff Set 60% >...
  • Page 52 Type 8756 Setting and operation The product status indicator is orange. A check-function event is generated. Go to Actuator > Actuating variable A check-function event is generated. Set 15%. Go to Actuator > Actuating variable Wait for 60 seconds. If the product still detects that the pipe is Do the following sequence: set 100% >...

  • Page 53: Tools For Doing The Settings

    Type 8920 Operating Instructions. Download the latest version of the Type 8920 Bürkert Commu- nicator software from country.burkert.com Connect the product to the Bürkert During installation, the büS stick must not be inserted at the Communicator software PC.
  • Page 54 Download the latest version of the Type 8920 Bürkert Commu- to the jack female-connector of the M12 female-connector nicator software from country.burkert.com cable. Install the Bürkert Communicator software on a PC. During in- Connect the M12 female connector to the büS network.

  • Page 55: Settings Specific To The Product Variant Büs/Canopen

    Type 8756 Setting and operation In the list of devices, click on the symbol related to the product: the menu structure for the product is displayed. A window opens. Settings specific to the product variant büS/CANopen 8.5.1 Set the CANopen communication or the büS communication Fig. 27: Assembled parts of the USB-büS-interface set with article To set the operating mode of the digital communication, do the...

  • Page 56: Operating Modes Of An Mfc

    Type 8756 Setting and operation To increase the data transmission-speed, click Set diagnostic 8.5.2 Increase the data transmission mode. The function Inhibit time switches to Set to default val- speed ues. If the data transmission speed is increased, then the product The data transmission-speed is increased.

  • Page 57: Normal Operating Mode (Mfc)

    Type 8756 Setting and operation Operating mode Description Electronics Open-loop control mode Refer to chapter: Choose the source that gives the set-point value (MFC) [} 60] Xout xd = w-x Analyze system Refer to chapter: Choose the source that gives the set-point value (MFC) [} 60] Tab. 65: Names of the operating modes of an MFC in the Bürkert Pump...
  • Page 58 Type 8756 Setting and operation The transmission means of the set-point value w and the meas- ured value of the flow rate depends on the product. xout Refer to chapter: Product variant büS /CANopen [} 58]. Refer to chapter: Product variant Analogue [} 58].

  • Page 59: Optimise The Closed-Loop Control Parameters (Mfc)

    Type 8756 Setting and operation If you have an MFC with pump, then fill the pipe as described in ▪ Run the Autotune function when the product is started for the the chapter: Fill the pipe without damaging the pump (MFC with first time.

  • Page 60: Choose The Source That Gives The Set-Point Value (Mfc)

    Bürkert Communicator software. specific help in the documentation of the initiation files. Download the initiation files and the related documentation at country.burkert.com. The setting of the parameter Set-point value source kept after a restart, except when the product performs the...

  • Page 61: Set-Point Values Without Communication (Mfc Büs/ Canopen)

    Download the initiation files and the related documenta- Risk of injury from electric shocks. tion at country.burkert.com ▶ Before working on the installation or product, switch off the power supply. Make sure that nobody can switch the power supply on.

  • Page 62: Replace The Memory Card

    Type 8756 Maintenance DANGER! WARNING! Burn hazard and fire hazard that are due to hot surface of the Risk of injury that is due to improper maintenance. product. ▶ Only trained personnel can do the maintenance work. Person- ▶ Do not touch the hot surface with bare hands. nel must use suitable tools.

  • Page 63: Sterilising A Product Variant Mfm With Hot Water

    Type 8756 Maintenance Let water at a temperature of 90°C flow through the product for 30 min. Let the product cool down for of 2h. Screws Commission the product. Cover Sterilising a product variant MFM Memory card: make sure the with steam insertion direction is correct.

  • Page 64: Troubleshooting

    Type 8756 Troubleshooting 10.1.2 Product status indicator is red (MFM TROUBLESHOOTING büS/ CANopen) 10.1 Problems shown by the product Identify the cause to solve the problem: status indicator Cause Solution The product status indicator changes its colour based on the Operate the product within The supply voltage is out of the NAMUR NE 107 recommendation to show diagnostics events.
  • Page 65 Type 8756 Troubleshooting 10.1.3 Product status indicator is red (MFC Cause Solution Analogue with pump) Make sure that the fluid Incorrect Autotune or Autotune flows through the product. aborted. Identify the cause to solve the problem: Do the Autotune again. Cause Solution Contact the manufacturer,...
  • Page 66 Type 8756 Troubleshooting Cause Solution Cause Solution Make sure that you have Make sure that the product The product is connected to büS error or CANopen-bus er- correctly allocated the pro- is correctly wired. büS, but does not find the pro- ror, for example a short circuit.
  • Page 67 Type 8756 Troubleshooting 10.1.9 Product status indicator is orange Cause Solution (MFC Analogue) Wait up to one minute until The product is connected to the product assigns its ad- büS and is configured manu- Identify the cause to solve the problem: dress.
  • Page 68 Type 8756 Troubleshooting Cause Solution Cause Solution Increase the fluid pressure. Assign an individual node ID The product has detected Other fieldbus participants use to each fieldbus participant. bubbles in the liquid. the same node ID. Do not use a fluid that is sat- urated with air.
  • Page 69 Type 8756 Troubleshooting Cause Solution Cause Solution Decrease the back pressure. Fill the pipe as described in The set-point position for the The product has detected that chapter Fill the pipe without actuator has (almost) reached the pipe is empty Make sure that the fluid vis- damaging the pump (MFC 100%.
  • Page 70 Type 8756 Troubleshooting 10.1.14 Product status indicator is yellow (MFC Cause Solution büS/CANopen with proportional Decrease the back pressure. The set-point position for the valve) actuator has (almost) reached Make sure that the fluid vis- 100%. The set-point value can- cosity is in the permitted Identify the cause to solve the problem: not be reached.
  • Page 71 Type 8756 Troubleshooting 10.1.16 Product status indicator is yellow (MFC Cause Solution Analogue for modular actuator) Fill the pipe as described in The product has detected that chapter Fill the pipe without the pipe is empty Identify the cause to solve the problem: damaging the pump (MFC Cause Solution...
  • Page 72 Type 8756 Troubleshooting Cause Solution Cause Solution Decrease the back pressure. If the connected actuator is The set-point position for the The product has detected a proportional valve, then actuator has (almost) reached bubbles in the liquid. Make sure that the fluid vis- flush bubbles from the pipe 100%.

  • Page 73: Miscellaneous Problems

    Type 8756 Troubleshooting 10.1.18 Product status indicator is blue 10.2.3 Product status indicator goes out periodically Cause Solution Identify the cause to solve the problem: Contact the manufacturer, Error in the internal memory. because maintenance is Cause Solution needed. Use a power supply with The power supply is intermit- sufficient power output.
  • Page 74 Type 8756 Troubleshooting 10.2.5 Replacement product does not adopt 10.2.7 No mass flow rate (MFC) all of the values from the defective Identify the cause to solve the problem: product Cause Solution Cause Solution If the product is not running The product is not in the normal Use the Bürkert Communic- one of the functions de-...
  • Page 75 Type 8756 Troubleshooting 10.2.8 Unstable measured value (MFM) 10.2.9 Unstable measured value (MFC with pump) Identify the cause to solve the problem: Identify the cause to solve the problem: Cause Solution Cause Solution To connect the functional You have not connected the earth, use a green-and-yel- functional earth (FE) properly.
  • Page 76 Type 8756 Troubleshooting 10.2.10 Unstable measured value (MFC with Cause Solution proportional valve or for modular Run the Autotune function to The product is caused to vi- actuator) adapt to the operating con- brate. ditions. Refer to chapter: Identify the cause to solve the problem: Optimise the closed-loop Cause Solution...
  • Page 77 Type 8756 Troubleshooting 10.2.13 Set-point value at 0 %, but operating Cause Solution fluid still flows (MFC Analogue with Either set the MFC to the The operating mode of the proportional valve) normal operating mode. product is set to Open-loop Refer to chapter: Normal control...
  • Page 78 Type 8756 Troubleshooting 10.2.14 Set-point value at 0 %, but operating Cause Solution fluid still flows (MFC büS/CANopen with Reduce the operating pres- The connected actuator is a proportional valve) sure. proportional valve and the op- erating pressure is above the To eliminate the defect, re- Cause Solution...
  • Page 79 Type 8756 Troubleshooting 10.2.18 Set-point value is not reached (MFC Cause Solution with pump) Install the fluid container in The connected actuator is a such a way that no pressure pump and there is pressure up- Identify the cause to solve the problem: is generated upstream the stream the pump.
  • Page 80 Type 8756 Troubleshooting 10.2.19 Set-point value is not reached (MFC 10.2.20Set-point value is not reached (MFC with proportional valve) for modular actuator) Identify the cause to solve the problem: Identify the cause to solve the problem: Cause Solution Cause Solution Clean or replace the mesh Clean or replace the mesh The mesh filter is clogged.

  • Page 81: Spare Parts And Accessories

    Type 8756 Spare parts and accessories 10.2.21 Outgassing or bubble formation at the SPARE PARTS AND product outlet (MFC with pump or for ACCESSORIES modular actuator) CAUTION! Identify the cause to solve the problem: Risk of injury, property damage due to incorrect parts. Cause Solution Incorrect options and unsuitable spare parts can cause injuries...

  • Page 82: Additional Software

    Item Article number Memory card On request Product variant büS /CANopen: EDS Download from Tab. 67: Electrical accessories, product variant büS /CANopen file country.burkert.com Bürkert Communicator software Download from Item Article number country.burkert.com USB-büS-interface set, without power sup- 772551 büS LabView-driver Download from country.burkert.com...

  • Page 83: Uninstallation

    Type 8756 Uninstallation UNINSTALLATION CAUTION! Risk of injury from dangerous fluids. 12.1 Safety instructions Contact with the operating fluid, its reaction products and va- DANGER! pours can cause injuries. Risk of injury that is due to pressure in the installation or in the Inhaled vapours can be harmful.

  • Page 84: Logistic

    Type 8756 Logistic LOGISTIC 13.1 Transport ATTENTION! Transport damage. If the product is not protected in transport, then the product can Fluid connections be damaged. ▶ Remove cables, connectors, product-external filters and in- Fig. 32: Fluid connections, for example internal-threaded connec- stallation equipment.

  • Page 85: Storage

    Type 8756 Logistic 13.2 Storage ATTENTION! Incorrect storage can cause damage to the product. ▶ Close fluid connections with protective caps. ▶ Store the product dry and dust-free in sealed zip lock bags. ▶ Storage temperature: –10...+70 °C. 13.3 Return No work or tests will be carried out on the product until a valid Contamination Declaration has been received.
  • Page 88 www.burkert.com...

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