Burkert 8742 Operating Instructions Manual
Profibus analogue mass flow meter (mfm) / mass flow controller (mfc)
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- Additional instructions (10 pages) ,
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Summary of Contents for Burkert 8742
- Page 1 Type 8742 Profibus Analogue Mass Flow Meter (MFM) / Mass Flow Controller (MFC) Massendurchflussmesser (MFM) / Massendurchflussregler (MFC) Débitmètre massique (MFM) / Régulateur de débit massique (MFC) Operating Instructions Bedienungsanleitung Manuel d‘utilisation...
- Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous réserve de modifications techniques. © Bürkert SAS, 2020 Operating Instructions 2004/00_EU-ML_00573731 / Original EN...
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Page 3: Table Of Contents
8742 Profibus, 8742 Analogue Table of contents 6.4 Markings ..............16 The OperaTing insTrucTiOns ..........5 6.4.1 Calibration plate ..........16 1.1 Definition of the term product ........5 6.4.2 Type label ............17 1.2 About Namur and Namur Recommendation NE107 ..5 6.4.3 Additional markings .......... 17 1.3 Symbols used ..............5 6.5 Mechanical data ............ - Page 4 8742 Profibus, 8742 Analogue 12.2 Troubleshooting of other problems ......43 sTarT-up ................32 9.1 Safety instructions ............32 13 accessOries /spare parTs ......... 45 9.2 start-up steps ............. 32 13.1 Electrical accessories ..........45 10 OperaTiOn ................ 33 13.2 Compression fittings for a product with threaded pipe connections ............45 10.1 Safety instructions ............33 13.3 Mesh filters ..............46 10.2 User-defined calibration ..........33 13.4 Additional software ............
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Page 5: The Operating Instructions
Definition of the term product CAUTION The term "product" as used in the Operating Instructions, refers The symbol warns of a possible danger. to one or several of the following devices: ▶ Failure to observe the warning may result in moderate or • a Type 8742 Profibus Mass Flow Meter (MFM) minor injuries. • a Type 8742 Analogue Mass Flow Meter (MFM) NOTICE • a Type 8742 Profibus Mass Flow Controller (MFC) The symbol warns of damage to property. • a Type 8742 Analogue Mass Flow Controller (MFC) ▶ Failure to observe the warning may result in damage to the About Namur and Namur device or system. -
Page 6: Intended Use
Indicates a result. equipment and the environment. menu Designates a text of a user interface. Type 8742 Profibus MFM or Type 8742 Analogue mfm is used exclusively to measure the mass flow rate of clean and dry gases. Type 8742 Profibus MFC or Type 8742 Analogue mfc is used exclusively to control the mass flow rate of clean and dry gases. -
Page 7: Variant With Atex Certification
8742 Profibus, 8742 Analogue Basic safety information Variant with ATEX certification BAsic sAfeTy infOrmATiOn This safety information does not take into account any contin- DANGER gencies or occurrences that may arise during installation, use risk of explosion in the event of improper use of the product and maintenance of the product. in potentially explosive areas. The operating company is responsible for the respect of the local ▶ Observe the specifications of the ATEX-conformity safety regulations including for the personnel safety. certificate. ▶ Observe the specifications in the ATEX supplement for Type 8742. The supplement is available at www.burkert.com. risk of injury that is due to pressure in the installation or in the product. - Page 8 8742 Profibus, 8742 Analogue Basic safety information NOTICE Various dangerous situations. To avoid personal injury: components / assemblies at risk from electrostatic charges. ▶ Do not operate the product without its mesh filter. The product contains electronic components which are suscep- ▶ Only operate the product in the installation position that is tible to electrostatic discharge (ESD). Contact with electrostati- given on the calibration plate. cally charged persons or objects endangers these components. ▶ Make sure the MFM operating-pressure is not higher than In the worst case, they will become defective immediately or will the operating pressure value on the product data-sheet. fail when energized. ▶ Make sure the MFC operating-pressure is not higher than the • To minimise or even avoid any damage caused by an elec- tight sealing pressure of the proportional valve. trostatic discharge, take all the precautions described in the ▶ Only use the product for the fluid specified as the operating EN 61340-5-1. fluid in the calibration protocol.
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Page 9: General Information
8742 Profibus, 8742 Analogue General information generAl infOrmATiOn Contact The name of the manufacturer is displayed as inset writing on the cover and the housing of the product. To contact the manufacturer of the product, use the following address: Bürkert SAS Rue du Giessen F-67220 TRIEMBACH-AU VAL The addresses of our international sales offices are available on the internet at: www.burkert.com Warranty The warranty is conditional on compliant use of the product in observance of the operating conditions specified in the Oper- ating Instructions. Information on the Internet Operating Instructions and data sheets for the product can be found online at: www.burkert.com English... -
Page 10: Description
8742 Profibus, 8742 Analogue Description descriPTiOn 3. Possible fluid connections: • G-threaded connections according to DIN ISO 228/1 Product variants • NPT-threaded connections according to ASME/ ANSI B 1.20.1 5.1.1 Mass Flow Meter (MFM) 4. M4 screw for functional earth connection 5. Base block 6. Flow direction 7. Product status-Indicator. The indicator operates according to Namur NE 107. 8. Not used 9. Status indicator of the fieldbus communication 10. Not used 11. Cover 12. M3 screw 13. büS interface for the Bürkert-Communicator software 14. Slot for the memory card 15. Impact protection-cover. The impact protection-cover is only delivered with an ATEX variant. -
Page 11: Mass Flow Controller (Mfc)
8742 Profibus, 8742 Analogue Description 5.1.2 Mass Flow Controller (MFC) 4. M4 screw for functional earth connection 5. Base block 6. Flow direction 7. Proportional valve. The proportional valve can be built inside the product. 8. Product status-indicator. The indicator operates according to Namur NE 107. 9. Not used 10. Status indicator of the fieldbus communication 11. Not used 12. Cover 13. M3 screw 14. büS interface for the Bürkert-Communicator software 15. Slot for the memory card 16. Impact protection-cover. The impact protection-cover is only delivered with an ATEX variant. Fig. 2: Mass Flow Controller, Profibus variant or Analogue variant 1. -
Page 12: Product Status-Indicator
8742 Profibus, 8742 Analogue Description Product status-indicator The product has an indicator to display the product status. If more than one product status exist simultaneously, the product status with the highest priority is displayed. Tab. 1: Description of the product status-indicator indicator colour code description meaning according to (for a plc) NE 107 Failure, error or fault MFM: Due to a malfunction of the product or its periphery, the measured values are not valid. MFC: Due to a malfunction of the product or its periphery, the measured values are not valid and the controlled operation is not possible. Orange Function check Work is done on the product. • MFM: The output signal is temporarily invalid. • MFC: The controlled operation is temporarily not possible. Yellow Out of specification The ambient conditions or process conditions for the product are outside the specified ranges. Product internal diagnostics point to problems in the product or with the process properties. -
Page 13: Status Indicator Of The Fieldbus Communication
8742 Profibus, 8742 Analogue Description Memory card → To solve a problem indicated by the product status-indicator, refer to chpt. 12.1 Troubleshooting if the product status-indi- NOTICE cator shows a problem. If the memory card is defective or lost, then buy a new memory Status indicator of the fieldbus card from your Bürkert sales office. communication The product is delivered with a memory card that is inserted in the product. A Profibus variant has an indicator to show the status of the connection to the network. At product start-up, there are two possibilities: • If product-specific data is stored on the inserted memory card, the product adopts the data. At product delivery, the memory card contains product-specific data. To get a list of the stored Status indicator of the data, refer to the Help for the Initiation file that can be down- fieldbus communication loaded from www.burkert.com. -
Page 14: Bürkert-Communicator Software
8742 Profibus, 8742 Analogue Description Bürkert-Communicator software The MassFlowCommunicator is another PC software that is not compatible with the product. You cannot use the PC-software MassFlowCommunicator to configure or operate the product. The Type 8920 Bürkert-Communicator is a PC-software and enables the following actions, for example: • Setting the parameters of the product, for example the basic settings for the product start-up • Running the diagnostics, and read the error memories for Fig. 4: Assembled parts of the USB-büS-interface set with article number 00772551 example → Set the termination-resistance switch of the büS stick to ON. • Updating the product software → Insert the büS stick into a USB port of the PC. • Adjusting the user-defined calibration curve → Energize the product. Refer to chpt. 8 Electrical installation. To use the Type 8920 Bürkert-Communicator software, do the → Insert the micro-USB connector into the büS-interface for the following steps: Bürkert Communicator software. The location of the büS-in-... -
Page 15: Proportional Valve Of An Mfc
8742 Profibus, 8742 Analogue Technical data TechnicAl dATA → Choose the port Bürkert büs stick, click on finish and wait until the product symbol appears in the list of devices. → In the list of devices, click on the symbol related to the Conformity product: the menu structure for the product is displayed. The product complies with the EU directives according to the EU declaration of conformity (if applicable). Proportional valve of an MFC Standards The MFC is equipped with a direct acting, normally-closed solenoid valve. The applied standards, which verify conformity with the EU direc- The proportional valve provides the sealing function when the tives, can be found on the EU type examination certificate and/or the EU declaration of conformity (if applicable). following conditions are met: • The product is used within the specified pressure range. Operating conditions • The product is equipped with a seat seal that is made of a soft material such as FKM or EPDM. WARNING NOTICE risk of injury from malfunction that is due to outdoor use. -
Page 16: Markings
8742 Profibus, 8742 Analogue Technical data markings Tab. 3: Operating conditions of the product Ambient temperature WARNING • Analogue variant • –10 °C...+50 °C • Profibus variant • –10 °C...+50 °C Risk of injury caused by pressure, fluid escape. Fluid temperature Important product-specific data is indicated on the Type label • MFM • –10 °C...+70 °C and the calibration plate. • –10 °C...+60 °C for oxygen ▶ Only use the product for the specified operating fluid. -
Page 17: Type Label
8742 Profibus, 8742 Analogue Technical data 6.4.2 Type label 11. Serial number 12. Category of the product 13. Profibus variant: communication interface 874x 24V ... 9W [5,5W] Analogue variant: input and output IP65/IP67 NEC Class 2 only 5,0 Nl/min Air 14. Nominal flow rate (Qnominal), units and operating gas 2 10,0 Nl/min Air PROFIBUS DPV1 max.12Mbit/s 15. Nominal flow rate (Qnominal), units and operating gas 1 GR:1 KL:A Ta=-10°C..+50°C 16. IP-Code... -
Page 18: Fluid Data
8742 Profibus, 8742 Analogue Technical data 6.6.1 Quality of the operating fluid Tab. 4: Materials of the product • Aluminium Base-block material Use the operating fluid that is given on the product Type-label. • Stainless steel 1.4305 The operating fluid must be clean and dry. Housing material Aluminium The gas or gas mixture must obey the quality criteria Sealing material See Type label in Tab. 5. The quality criteria are given in standard Product status-indicator Polycarbonate ISO 8573-1, Compressed Air - Part 1: Contaminants and purity classes. The operating gas must obey the quality ATEX impact protection-cover Stainless steel 1.4301 criteria to obey the following requirements: MFC: Materials of the solenoid valve 1.4310, 1.4113, 1.4305 • the necessary measurement precision of the product that are in contact with the fluid •... - Page 19 8742 Profibus, 8742 Analogue Technical data • the product fluid-connection type ∆p [mbar] • the product base-block size 40.00 • the operating gas 30.00 The pressure loss in an MFM can be either read from a diagram that is given by the MFM manufacturer, or calculated with a 20.00 Flange formula. → If the operating gas is air, read the pressure-loss value 10.00 directly from the diagram in Fig. 8 or in Fig. 9. For example, if 0.00 the flow rate through an MFM with 1/4" threaded fluid-con- 90 100 nections is 55 l /min then the pressure loss p as given in Q [Nl/min] Fig. 8 is 20 mbar. Fig. 9: Pressure loss diagram, MFM with a 250 µm mesh filter, for air, in the measurement range 80...160 l...
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Page 20: Electrical Data
8742 Profibus, 8742 Analogue Technical data Electrical data ρ 6.7.1 Analogue variant ρ WARNING = pressure loss of the operating gas ▶ For UL-certified components, only use limited power circuits of "NEC Class 2". air = pressure loss of air ρ = d ensity of the operating gas at the standard con- Tab. 6: Electrical data of an MFM ditions according to DIN 1343 (P = 1013.25 mbar, Operating voltage 24 V DC ±10 % = 273.15 K) (15 V DC ±10% on request) N ρ air = d ensity of air at the standard conditions according to Maximum power consumption 1 W... -
Page 21: Profibus Variant
8742 Profibus, 8742 Analogue Technical data 6.7.2 Profibus variant Tab. 7: Electrical data of an MFC Operating voltage 24 V DC ±10% WARNING (15 V DC ±10% on request); residual ripple < 2 % ▶ For UL-certified components, only use limited power circuits Maximum power Refer to the Type label of "NEC Class 2". consumption Set-point analogue input Tab. 8: Electrical data of an MFM • 0/4...20 mA • Maximum input impedance: 200 W Operating voltage 24 V DC ±10 % Resolution: 5 µA Maximum power consumption 3 W •... -
Page 22: Installation
8742 Profibus, 8742 Analogue Installation insTAllATiOn Installation steps 3. Do the fluid installation. Refer to chpt. 7.4. Safety instructions 4. Do the electrical installation. Refer to chpt. 8. 5. Start-up the product. Refer to chpt. 9 Start-up. DANGER Additional documentation risk of injury that is due to pressure in the installation or in the product. • Product-specific help in the Bürkert-Communicator software ▶ Before working on the installation or product, cut the pres- • Product description file and object description for the related sure. Vent and drain the pipes. product Type must be downloaded from www.burkert.com risk of injury from electric shocks. - Page 23 8742 Profibus, 8742 Analogue Installation No inlet section is required. If the compression fittings are not delivered with the product, then choose pipe fittings from another manu- The connection to the pipe is explained for one side of the product. facturer. The pipe fittings must be adapted to the fluid The same procedure applies on the other side of the product. connection of the product. Compression fittings for → Remove all dirt from the pipes and from the fluid carrying G-threaded connections are available as accessories, components of the installation. see Tab. 11. Also buy the seal for each fluid connection. → Cut the pipe squarely [1] and deburr [2]. See Fig. 12. Tab. 11: Stainless steel compression fittings and related seals article number product threaded connection in pipe stainless steel seal accordance with diameter...
- Page 24 8742 Profibus, 8742 Analogue Installation → Slide the nut [a] and then the ferrule onto the pipe. See Fig. ferrule Fig. 15: Nut screwed by hand → Tighten the nut with an open-end spanner to a torque of 25...28 N·m, that is 18.44...20.65 lbf·ft. See Fig. 16. Fig. 13: Nut and ferrule on the pipe → Place the sealing ring [C] on the product fluid-connection. → Screw the connecting thread [B] in the fluid connection. Tighten to a torque of 25...28 N·m, that is 18.44...20.65 lbf·ft. See Fig. 14. Fig. 16: Nut tightened with an open-end spanner → Do the fluid connection on the other side of the product in the same way.
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Page 25: Product With Npt-Threaded Connections
8742 Profibus, 8742 Analogue Installation 7.4.2 Product with NPT-threaded connections WARNING risk of injury that is due to leakage. ▶ At a low mass flow rate and a high pressure, make sure the installation is tight. The tightness prevents incorrect meas- urements or the leakage of the operating fluid. To make sure the installation is tight, observe the following Fig. 17: Pipe cut and deburred instructions: NOTICE ▶ Use compression fittings. Mount the compression fittings, in a way that they are not subject to any stresses. malfunction that is due to contamination. ▶ Use pipes with a diameter that is adapted to the fluid con- ▶... -
Page 26: Product With Flange Connections
8742 Profibus, 8742 Analogue Electrical installation elecTricAl insTAllATiOn 7.4.3 Product with flange connections WARNING Safety instructions risk of injury that is due to leakage. DANGER At a low mass flow rate and a high pressure, make sure the risk of injury from electric shocks. installation is tight. The tightness prevents incorrect measure- ments or the leakage of the operating fluid. ▶ Before working on the installation or the product, switch off the power. Make sure that nobody can switch the power on. Vibrations have an unwanted effect on the proportional ▶ Observe all applicable accident protection and all applicable valve of the MFC. safety regulations for electrical equipment. ▶ Avoid severe vibrations. -
Page 27: Wiring The Analogue Variant
8742 Profibus, 8742 Analogue Electrical installation Wiring the Analogue variant WARNING To wire the product, you can use mating male or female con- Risk of injury from electromagnetic fields. nectors from Bürkert. Refer to Tab. 12. If the functional earth (FE) is not attached, then the requirements of the EMC directive are not met. Tab. 12: Accessories: male connector and female connector ▶ Connect the housing to the functional earth (FE). Use a green- item article number and-yellow cable that is as short as possible. And the cable Straight 5-pin M12 female connector 772416 cross-section must be at least equal to the cross section of Straight 5-pin M12 male connector 772417 the power-supply cable. • Observe the specifications for the cable and conductors,... - Page 28 8742 Profibus, 8742 Analogue Electrical installation → If your product is an MFC, wire the mating female connector Pin Assignment according to the pin assignment of the M12 male connector Digital input, GND in Fig. 19. Digital input + Assignment Relay, reference Set-point input contact Coding lug Relay, normally Coding lug 24 V closed contact (Break contact) Set-point input Relay, normally M12 thread is internally connected open contact Analogue output to FE (Make contact) for the measured M12 thread is internally con- Fig. 20: Analogue MFM or Analogue MFC: Pin assignment, 5-pin M12...
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Page 29: Digital Input
8742 Profibus, 8742 Analogue Electrical installation 8.2.1 Digital input Tab. 14: Actions triggered by the switching levels Switching levels Function The 5-pin M12 female connector has a digital input. A digital input Level 1 Level 2 Level 3 is used to remotely trigger a function. The following functions are If activated, MFC: start available: triggers the Not used Not used autotune • MFC: Start the function autotune. function If activated, If activated, If activated, • MFC: Trigger the remote control of the actuator or trigger the MFC: actuator triggers the the product is triggers the control of the actuator by the product. -
Page 30: Relay Output
8742 Profibus, 8742 Analogue Electrical installation Wiring the Profibus variant 8.2.2 Relay output The 5-pin M12 female connector has a relay output. The switching To wire the product, you can use mating male or female con- of the relay can show one of the following event: nectors from Bürkert. Refer to Tab. 17. • MFC: The set-point value cannot be reached. Tab. 17: Accessories: male connector and female connector • MFC: The product is doing an Autotune. item article number • MFC: The set-point value source has changed. Straight 5-pin M12 female connector 772416 • MFM or MFC: A warning message has been generated. For Straight 5-pin M12 male connector 918198 example if the supply voltage is too high, then a warning (B coding) -
Page 31: Connecting The Functional Earth
8742 Profibus, 8742 Analogue Electrical installation → Screw the mating male connector to the 5-pin female connector, Pin Assignment to the torque that is given by the manufacturer of the mating Shielding female connector. 24 V Coding lug → Do the functional earthing of the product. Refer to chpt 8.4. → If an ATEX product is used in a potentially explosive area, then Not connected fit the impact protection-cover back if you have removed it. Not connected Connecting the functional earth M12 thread is internally connected to FE To do the functional earthing of the product, obey the following Fig. 21: Profibus MFM or Profibus MFC: Pin assignment, 5-pin M12 instructions: male connector (A coding) →... -
Page 32: Start-Up
8742 Profibus, 8742 Analogue Start-up START-UP If the inserted memory card is empty, then the product loads its own data on the memory card. Possible problems related to Safety instructions the memory card are given in Tab. 22 on page 44. NOTICE WARNING If the memory card is defective or lost, then buy a new memory risk of injury from improper operation. card from your Bürkert sales office. Improper operation can lead to injuries and damage to the 4. If the product is an MFC and if the operating fluid is not the product and its environment. calibration fluid or if the pressure conditions have changed, ▶ Before start-up, make sure that the operating personnel are then run the Autotune function. See chpt. 10.5 Optimising the familiar with, and fully uunderstand the content of the Oper- control parameters (MFC). ating Instructions. 5. Regular operation. ▶ Observe the safety information and the intended use. ▶ Only properly trained personnel may commission the instal- lation and the product. ▶ Only properly trained personnel may change parameters with the help of the Bürkert-Communicator software. start-up steps 1. -
Page 33: Operation
8742 Profibus, 8742 Analogue Operation OPerATiOn WARNING risk of injury that is due to improper operation. 10.1 Safety instructions Improper operation can lead to injuries and damage to the product and its environment. DANGER ▶ The operating personnel must have read and understood the risk of injury that is due to pressure in the installation or in content of the Operating Instructions. the product. ▶ Observe the safety information and the intended use. ▶ Before working on the installation or product, cut the pres- ▶... -
Page 34: Normal Operating Mode (Mfc)
8742 Profibus, 8742 Analogue Operation Tab. 18: Names of the operating modes of an MFC in the Bürkert- Communicator PC-software Operating mode description Profibus variant: automatic Refer to chpt. 10.4 = w-x Analogue variant: analog set-point Refer to chpt. 10.4 value Electronics manual set-point value Refer to chpt. 10.6 stored set-point value Refer to chpt. 10.6 Proportional valve Sensor Open-loop control mode Refer to chpt. 10.6... -
Page 35: Profibus Variant
8742 Profibus, 8742 Analogue Operation → To change the operating mode, change the source for the set- Tab. 19: Analogue-input ranges and analogue-output ranges point values. Refer to chpt. 10.6. Analogue Minimum value of the Maximum value of the output input ranges and output input ranges and output → If the operating fluid is not the calibration fluid then run the range ranges ranges Autotune function. Refer to chpt. 10.5 Optimising the control 4...20 mA 4 mA, w = 0% parameters (MFC). 20 mA, w = 100% 0...20 mA 0 mA, w = 0% → If the pressure conditions have changed, then run the 0...5 V 5 V, w = 100% Autotune function. Refer to chpt. 10.5 Optimising the control... -
Page 36: Specifying The Source Giving The Set-Point Value (Mfc)
8742 Profibus, 8742 Analogue Operation If you change the source for the set-point value, then the operating WARNING mode of the MFC is changed. Risk of injury from flowing gas. To change the source for the set-point value, change the setting of the parameter set-point value source with the Bürkert-Com- While the Autotune function is running, the gas flow can be municator PC-software. higher than the nominal flow. ▶ Before running the Autotune function, make sure no danger On a Profibus variant you can alternatively change the related object. can occur if the gas flow increases. Refer to the related procedure in the product-specific help in the documentation of the initiation files. Download the initiation files → Trigger the Autotune function: and the related documentation at www.burkert.com. - via the fieldbus (Profibus variant), The setting of the parameter set-point value source is - via the digital input (analogue variant), kept after a restart, except if the product performs the - or with the Bürkert-Communicator software. function analyze system. The Autotune runs and the product status-indicator is orange. -
Page 37: Zero-Point Shut-Off (Mfc)
8742 Profibus, 8742 Analogue Operation To open the valve completely: sets the set-point position (y) to zero. • → send an acyclic command to the product, analyze system: the product operates in the normal operating mode but according to a predefined chronological sequence with → or send a cyclic command with the double nominal flow rate. set-point values. Use the resulting diagram in combination with the graphical representation of process values to analyse the 10.9 Set-point values without system with the Bürkert-Communicator software. communication (Profibus MFC) 10.7 Zero-point shut-off (MFC) The function makes it possible to specify the set-point values of an MFC even if the communication with the external set-point A zero-point shut-off ensures the sealing function of the integrated value provider (for example a PLC) is broken. If the function is valve The zero-point shut-off is activated if the following conditions used, then the set-point is kept constant. -
Page 38: Maintenance
8742 Profibus, 8742 Analogue Maintenance mAinTenAnce WARNING If no heavily contaminated fluids are used and if the product is risk of injury that is due to improper maintenance work. operated according to the Operating Instructions, then the product ▶ Only trained personnel can do the maintenance work. Per- is maintenance-free. sonnel must use suitable tools. 11.1 Maintenance for operation with ▶ Secure the installation against unintentional actuation. heavily contaminated fluids ▶... -
Page 39: Inspecting And Cleaning The Stainless Steel Mesh-Filter
8742 Profibus, 8742 Analogue Maintenance 11.1.1 Inspecting and cleaning the stainless → Clean the stainless steel mesh-filter [4] with acetone, isopro- panol or compressed air. steel mesh-filter → Dry the mesh filter. The inspection and possibly cleaning of the stainless steel mesh- filter must be done at regular intervals. The inspection frequency and cleaning frequency depend on the measured fluid. → Before mounting the parts back, make sure that the fine side of the mesh filter [4] faces the flange plate [2] item description → Mount the parts back in the correct order, as given in Fig. 25. Screws → Make sure that the mesh filter and the O-ring are seated flat Flange plate and not tilted. O-ring → Insert the flange plate [2] and the screws [1]. Stainless steel mesh-filter → With an hexagon key of size 2.5 mm, tighten the screws to a torque of 1.2 N·m, that is 0.88 lbf·ft. 11.2 Cleaning and recalibration at the... -
Page 40: Replacing The Memory Card
Cross-sectional drawing of a product Type 8742 Screws → Fit the cover back. → If an ATEX product is used in a potentially explosive area, then fit the impact protection-cover back. Cover → With a TX8 key for hexalobular-internal screw, tighten the cover screws to a torque of 1.2 N·m, that is 0.9 lbf·ft. Memory card: Make sure the → Restart the product to write the product data on the new insertion direction is correct. memory card. Possible problems related to the memory card are given in Tab. 22 on page 44. Fig. 26: Insertion direction of the memory card on a product Type 8742 → Remove the old memory card from its slot. → Pay attention to the insertion direction of the memory card. Fig. 27 shows the final position of the memory card in the product. English... -
Page 41: Troubleshooting
8742 Profibus, 8742 Analogue Troubleshooting TrOuBleshOOTing 12.1 Troubleshooting if the product status-indicator shows a problem The product has an indicator to show the product status. The colour and status of the indicator change according to Namur NE 107. If more than one product status exist simultaneously, then the product status with the highest priority is displayed. Tab. 20: Troubleshooting if a problem is shown by the product status-indicator indicator description What to do? according to NE 107 The product is not energised. Energise the product. Flashing (any Product is selected in the Bürkert-Communicator software. After 10 seconds, the product automatically returns to the pre- colour) vious status. - Page 42 8742 Profibus, 8742 Analogue Troubleshooting indicator description What to do? according to NE 107 MFC: Control loop disabled and direct specification of the set- point position to the valve because the parameter set-point value source is set to Open-loop control mode. Orange MFC: manual set-point value or Open-loop control as set- point value source. MFC: analyze system function active Yellow One of the following values is out of specification: Operate the product within the specifications. • the fluid temperature If the product-status indicator is still yellow, send the product back to the manufacturer. • the product temperature • the supply voltage MFC: The set-point position for the proportional valve has Increase the inlet pressure or decrease the back pressure. (almost) reached 100%. The set-point value cannot be reached. Observe the permissible inlet pressure and the permissible back pressure.
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Page 43: Troubleshooting Of Other Problems
8742 Profibus, 8742 Analogue Troubleshooting 12.2 Troubleshooting of other problems Tab. 21: Troubleshooting of other problems problem possible cause What to do? The product sta- The power supply is intermittently dropping. The product Use a power supply with sufficient power output. tus-indicator goes out restarts. periodically The voltage drop in the connecting cable is too large. Increase the cross-section of the cable. Reduce the cable length. MFC: No mass flow rate Increase the set-point value until it is higher than 2% of the The set-point value is below the zero-point shut-off nominal flow rate. limit. MFC: The product is possibly running one of the functions The product is not in the normal operating mode. See described in chpt. 10.6 Specifying the source giving the set- chpt. 10.4. point value (MFC). If the product is not running one the func- tions described in chpt. 10.6, then check the other possible... - Page 44 8742 Profibus, 8742 Analogue Troubleshooting problem possible cause What to do? Set-point value at The installation position of the product is incorrect. Install the product in the position indicated on the calibration 0 %, valve is closed, plate or in the calibration protocol. And run the Autotune no mass flow, but a function to adapt to the operating conditions. non-zero mass flow The operating fluid is different from the fluid specified during Use the specified operating fluid or send the product to the rate is measured the calibration. manufacturer for calibration with the new operating fluid. Set-point value is not The mesh filter is clogged. Clean or replace the mesh filter. reached The inlet pressure is too low. Increase the inlet pressure to the calibration pressure value. The outlet pressure is too high. If the fluid connection pipes after the product are dirty, then clean them. Tab. 22: Troubleshooting, memory card problem possible cause What to do?
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Page 45: Accessories /Spare Parts
8742 Profibus, 8742 Analogue Accessories /Spare Parts AccessOries /sPAre PArTs item article number Straight 5-pin M12 female connector CAUTION 918447 (B coding) Profibus* Y-piece 902098 risk of injury and risk of material damage that are due to Profibus T-piece 918531 unsuitable parts. Profibus termination resistor, male con- Incorrect accessories and unsuitable replacement parts can... -
Page 46: Mesh Filters
8742 Profibus, 8742 Analogue Decommissioning 13.3 Mesh filters decOmmissiOning Tab. 26: Spare parts – Mesh filters 14.1 Safety instructions item article number DANGER MFC: Stainless steel mesh-filter, mesh size 25 µm 676329 risk of injury that is due to pressure in the installation or in 13.4 Additional software the product. -
Page 47: Dismantling The Product
8742 Profibus, 8742 Analogue Transport 14.2 Dismantling the product TrAnsPOrT → Relieve the operating fluid pressure in the installation. NOTICE → Flush the product with a neutral fluid (for example nitrogen) Transport damage. → Relieve the flushing fluid pressure in the installation. If the product is not protected in transport, the product can be → De-energize the product. damaged. → Remove the electrical wiring. • Remove cables, connectors, product-external filters and installation equipment. → Disconnect the fluid connections. • Protect the electrical interfaces with protective plugs. → Remove the product. • Clean and vent contaminated products. • Close the fluid connections with protective caps. Protective caps ensure protection and sealing. -
Page 48: Storage, Disposal
8742 Profibus, 8742 Analogue Storage, disposal sTOrAge, disPOsAl reTurning The PrOducT NOTICE no work or tests will be carried out on the product until a valid contamination declaration has been received. 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. - Page 50 www.burkert.com...
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