KROHNE CORIMASS MFM 4085 K/F Installation And Operating Instructions Manual
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KROHNE CORIMASS MFM 4085 K/F Installation And Operating Instructions Manual

KROHNE CORIMASS MFM 4085 K/F Installation And Operating Instructions Manual

Single straight tube mass flow meter g+ class
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02/98
CORIMASS G+ Class
Single straight tube mass flow meter
Installation and
Operating
Instructions
MFM 4085 K/F

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Summary of Contents for KROHNE CORIMASS MFM 4085 K/F

  • Page 1 02/98 Installation and CORIMASS G+ Class Operating Instructions Single straight tube mass flow meter MFM 4085 K/F...
  • Page 2 If you need to return CORIMASS flowmeters to KROHNE, please complete the form on the last page of this manual and return it with the meter to be repaired. Krohne regrets that it cannot repair or check your flowmeter unless accompanied by this completed form.

  • Page 3: Table Of Contents

    Programming the converter with a bar magnet Part B MFC 085 Signal Converter 25 - 75 Operation of the Signal Converter Operating and check elements Krohne Operating Concept Key functions 4.3.1 How to enter programming mode 4.3.2 How to terminate programming mode Table of programmable functions...
  • Page 4 5.11 Standby function 5.12 Density adjustment for maximum measuring accuracy 5.13 Specific gravity 5.14 User data 5.14.1 Programming the display language 5.14.2 Password protection of menus 5.14.3 Custody transfer protection code 5.14.4 Primary head type and tube parameters (CF1-5) 5.14.5 Location Part C Special options, Functional checks, Service and Order numbers 76 - 95 Special options...

  • Page 5: Part A Installation And Start-Up

    Part A Installation and Start-up Installation in the pipeline General principles The MFM 4085 K/F CORIMASS mass flow meter provides high accuracy and excellent repeatability. Narrow band pass digital filtering, and the mathematically modelled internal primary head design provides exceptional immunity to external vibratory disturbances from nearby process equipment.
  • Page 6 ¾ Avoid mounting the meter with long vertical drops after the meter. This could cause siphoning and cause measurement errors. Siphoning effect Figure 2. Avoid long vertical drops ¾ Install meter at least 4 × L downstream of pumps. (where L = length of the meter) >...
  • Page 7 ¾ The use of flexible hoses is allowed. For best results the meter should be supported by two spool pieces and the hoses connected to these spool pieces. For low flow rates (less than 10%) secondary clamps may be required. Figure 6 Note: See table on next page for information on supports for distances, L.

  • Page 8: Mounting Figures

    ¾ Should it become necessary to support the pipework, the following guidelines should be followed. Do not clamp the meter body or the process pipework closer than distance L, as shown in the table below. Due to the weight of the 800 to 3000 G, the pipework should be supported.
  • Page 9 The following values are a guideline to a good installation: With the meter filled with water, the values should be less than the figure indicated. • Installation factor Meter Size Installation factor Non Ex 10 G + 100 G + 300 G + 800 G + 1500 G +...

  • Page 10: Cross Talk

    As a safety precaution Krohne has decided to ship the 800 G to 3000 G with extended spool pieces with the customer-requested sanitary connectors on the ends.

  • Page 11: External Heating And Insulation

    Nitrile • EPDM PTFE 39.5 Installation lengths for sanitary connections - please contact Krohne for further details as installation lengths depend on customer requirements. • Typical Torque on request. External Heating and Insulation When installing the G+ Meter in heated and insulated pipelines, it is not generally necessary or desirable to heat or insulate the case of the meter.
  • Page 12 Notes: 1. Insulation Material: Rubber, Foam, Glass Fibre, or any other process suitable material. 2. Insulation must be firmly fixed to the pipework. If especially desired by the customer, it is permissible to insulate the meter itself. If this is required, then the following guidelines should be followed.
  • Page 13 (figure 16) or run back to the first clamp and then in a loop to the opposite clamp (figure 17). Krohne can supply a list of electrical heating tape suppliers, if required. If the meter case is insulated then heating tape may be applied tightly under the insulation.

  • Page 14: Hot Fluid Or Steam Heating

    It is an advantage to avoid process pipework of a large diameter compared to the meter bore. Krohne can provide further guidelines and dimensions of suitable pipes and jackets. The jacket must be completely filled with no air pockets present.

  • Page 15: Heating Up From Cold

    Also available are special jacketed meters as shown in figure 19. These are also Ex approved. Remote jacketed meter must be fitted with an insulation adaptor shown in fig. 13. Figure 19 In all cases, the installation factor should be monitored and maintained within normal levels. 1.3.4 Heating Up From Cold The proceeding insulation and heating instructions also apply in this case, together with the following notes:...
  • Page 16 To assess the time allowable, refer to figures 11,12 and 13, which cover the 10G+, 100G+ and 300G+ meters. For the 800G+ and 1500G+ refer to Krohne Ltd. This does not apply to the 3000G+. These meters must not exceed 130°C. Zirconium tube meters must never exceed 100°C.

  • Page 17: Electrical Installation

    ALLOWABLE TIME AT HIGH TMP. 300G/ 800G METER Initial Initial Initial TEMP. C Electrical installation Location and connecting cables Location Do not expose the compact flow meter to direct sunlight. Install a sunshade if necessary. Connecting cables To conform to protection category requirements, observe the following recommendations: –...

  • Page 18: Connection To Power

    Connection to power Please ensure that the information about power given on the data plate corresponds to the locally available mains voltage. – Note information given on the instrument data plate (voltage, frequency)! – Electrical connection in conformity with IEC 364 or equivalent national standard. Special regulations apply to installation in hazardous areas.
  • Page 19 For the standard converter, the pulse output is passive and requires an external voltage source for operation. In addition, the signal may need protection from external electrical interference. The use of screened cables and a filter capacitor next to any counter is recommended.

  • Page 20: Connection Of Remote Meters

    Additional input/output options Option 4* Option 5* Option 6 Option C Option D Option E Option F (Current and (Current and (1 Current, (2 current, (3 current (3 current (3 current RS485) Modbus) 1 Dual pulse and phase pulse control pulse) control status...

  • Page 21: Start-Up

    The connection on the transducer end is done for both versions over a special connector. On the fixed version the connection on the converter side is fixed. The second option uses a junction box for the connection. Wiring is done according to the following figure. PG 16 or ¾” NPT adaptor are available with the junction box version to put the cable into flexible conduit.

  • Page 22: Initial Start-Up

    Initial Start-up • Please check that the power supply corresponds to the information supplied on the data plate. • Switch on the power supply. • On switch-on, the signal converter first carries out a self-test. The following sequence is displayed: TEST 10 G GX.XX...
  • Page 23 Now initiate zero adjustment by way of the following keystroke combination: Start from measuring mode Display line 1 line 2 → Fct. (1).0 OPERATOR 2x→ Fct. 1.1.(1) ZERO SET → (MEASURE.VAL.) ↵ CALIB. (NO) ↑ CALIB. (YES) ↵ PERCENT ACCEPT (YES) ↵...

  • Page 24: Programming The Converter With A Bar Magnet

    Programming the converter with a bar magnet • The converter can be programmed by means of the magnetic sensors mounted on the faceplate without removing the front lid. • To do this, a bar magnet (standard supply) is used to activate the sensors by holding the magnet close to the glass window of the housing lid.

  • Page 25: Part B Mfc 085 Signal Converter

    Part B MFC 085 Signal Converter Operation of the Signal converter Operating and check elements The operating elements are accessible after removing the cover of the electronics section using the special wrench. The converter is also programmable with magnetic sensors and a bar magnet without removing the covers of the electronic housing.

  • Page 26: Krohne Operating Concept

    Krohne Operating Concept...

  • Page 27: Key Functions

    Key functions Function of the keys The location of the cursor on the display is indicated by flashing characters. This Cursor could be a single digit when entering number; numeric sign ( + or -) ; measure-ment units (g,kg,t etc.); or any other text field. Throughout this manual the location of the cursor, in programming examples, will be indicated by parentheses ( ) around the flashing characters.

  • Page 28: How To Enter Programming Mode

    4.3.1 How to enter programming mode To start: Display Comments → Press Fct. 1.0 If this appears, see next box: ”Function of the keys ” . Operation If this appears on the display, set the 9-keystroke Entry CodE 1 CodE 1 . --------- Factory setting: →...
  • Page 29 Examples The cursor (flashing part of display) has a grey background in the following examples: To start programming Measurement mode Programming mode → 1 3. 5 7 1 F c t. 1. 0 O P E R A T PLEASE NOTE: When ”yes”...
  • Page 30 To change numeric values Increase numeric value ↑ 2 1 0 2 1 0 / m i / m i To move the cursor (flashing digit) To move to the right → 2 1 0 2 1 0 / m i / m i To move the decimal point To move to the right...

  • Page 31: Table Of Programmable Functions

    Table of programmable functions Fct. No. Text Description and settings OPERATION Main menu 1.0 Operation 1.1.0 BASIS.PARAM Submenu 1.1.0 Base data 1.1.1 ZERO SET Zero adjustment. See Fct. 3.1.1 1.1.2 L.F. CUTOFF Low flow cutoff. See Fct. 3.1.2 1.1.3 TIME CONST. Signal converter time constant.
  • Page 32 Fct. No. Text Description and settings TEST Main Menu 2.0. Test functions TEST DISP. Carry out display test. Start with the key → (Duration of test approx. 30 sec.). Stop test at any time with the ↵ key. TEST I Test current output I * SURE (NO).

  • Page 33: Low Flow Cutoff

    Fct. No. Text Description and settings INSTALL. Main menu 3.0 Installation 3.1.0 BASIS.PARAM Submenu 3.1.0 Base data 3.1.1 ZERO SET Zero adjustment. Use the ↑ key to select between MEASURE.VAL. and SET VALUE then press the ↵ key. * MEAS.VALUE (ensure "ZERO" flow in the pipeline) 1) Select: CALIB.YES or NO 2) If YES: Calibration (approx.
  • Page 34 Fct. No. Text Description and settings 3.2.0 DISPLAY Submenu 3.2.0 DISPLAY 3.2.1 CYCL. DISP. Cyclic display required? Setting NO or YES. If YES is selected then in measurement mode the display will switch from Mass Flow to Density to Total to Temperature every 4 seconds. 3.2.2 STATUS MSG.
  • Page 35 Fct. No. Text Description and settings 3.3.0 CUR.OUTP. I Submenu Current output I For systems with 2 or more current outputs see Sect. 4.7 3.3.1 FUNCTION I Function current output I * OFF (O/P current = 0 mA) * MASS FLOW (Mass flow in range MIN [Fct. 3.3.3] to MAX [Fct.
  • Page 36 Fct. No. Text Description and settings 3.4.0 PULS.OUTP. P Submenu 3.4.0 Frequency output P 3.4.1 FUNCTION P Function frequency output P * OFF (Output = 0V DC) * MASS FLOW (Frequency output 0 to MAX Freq. Hz = Mass Flow in range: MIN. FLOW to MAX FLOW as set in Fct.
  • Page 37 Fct. No. Text Description and settings 3.5.0 ALARM.OUT.A Sub menu 3.5.0 Process alarm output 3.5.1 FUNCTION A Function for alarm output P * OFF (Output goes to its inactive state) * MASS FLOW (Alarm active if mass flow goes outside limits as set in Fcts.
  • Page 38 Fct. No. Text Description and settings 3.6.0 CTRL.INP.E Submenu 3.6.0 Control input 3.6.1 FUNCTION E Function of the control input * OFF (control input inactive) * STANDBY (When active converter switches to STANDBY) * ZERO SET (Zero calibration triggered on the transition from inactive to active on the control input) * RESET TOTAL (Totaliser reset to zero on the transition from inactive to active on the control input)
  • Page 39 Fct. No. Text Description and settings 3.8.0 USER DATA Submenu 3.8.0 User data 3.8.1 LANGUAGE Language for display text * GB/USA (= English) * F (= French) * D (= German) 3.8.2 ENTRY.CODE1 Entry code for accessing menus required? * NO (Entry to menus with the → key only) * YES(Entry with →...
  • Page 40 Fct. No. Text Description and settings 3.9.0 TUBE PARAMS Submenu 3.9.0 primary head specific parameters Password protected, see Fct. 3.8.8 3.9.1 Density coefficient 1 Input the value stamped on the primary head’s data plate or perform on site calibration as described in Sect. 5.12. 3.9.2 Density coefficient 2 Input the value stamped on the primary head’s data plate...
  • Page 41 Fct. No. Text Description and settings PARAM.ERROR Main Menu 4.0 Parameter error Not Used 4.2.0 CUR.OUTP.I Range settings incorrect LOW SCALE ≥ FULL SCALE 4.2.1 LOW SCALE Low scale range for current output I see Fct. 3.3.3 4.2.2 FULL SCALE Full scale range for current output I see Fct.
  • Page 42 View status message(s) and quit Button Display Description 0.36 Measurement mode The presence of the ∇ marker above Status on the kg/min display indicates the presence of warning messages in ∇ the status list. ↵ Enter access code for reset/quit menu: ↑ → CodeE 2 –...
  • Page 43 Status messages ERROR TYPE COMMENT MESSAGES SAMPLING Severe PLL out of range SENSOR A Severe Sensor A voltage signal less than 5% of desired value SENSOR B Severe Sensor B voltage signal less than 5% of desired value RATIO A/B Severe One sensor signal much larger than the other EEPROM...
  • Page 44 Menu variations for systems with other output options Fct. No OPTION 1 OPTION 2 OPTION 4 OPTION 5 OPTION 6 OPTION C OPTION D OPTION E OPTION F Fct. 1.3 CUR.OUTP.I CUR.OUTP.I* CUR.OUTP.I CUR.OUTP.I CUR.OUTP.I CUR.OUTP.I* CUR.OUTP.I* CUR.OUTP.I* CUR.OUTP.I* Fct. 1.4 PULS.OUT.P BLOCKED BLOCKED...
  • Page 45 5. Functions Description of Functions Zero point adjustment When operating the system for the first time, it is necessary to set the zero point of the instrument. Once the zero point has been adjusted, the installation should not undergo any further modifications in order to maintain the quality of the measurement.
  • Page 46 The operator can now choose either A) Automatic (recommended) or B) manual adjustment. A) Automatic adjustment : Display line 1 line 2 ↵ CALIB. ( NO) ↑ CALIB. (YES) ↵ PERCENT* ↵ ACCEPT (YES) 4x↵ Return to measuring mode * Display of actual flow rate % of maximum value, for a period of 20 seconds.
  • Page 47 Under certain circumstances, when the media consists of unevenly mixed components, it might be difficult to adjust the zero point. In such a case, the zero point adjustment procedure must be carried out under special conditions : – Media which tend to vaporise or degas should be kept under higher pressure. –...
  • Page 48 To set the Time Constant : Begin from measuring mode. Display line 1 line 2 →→→ Fct. 1.1.(1) ZERO SET ↑↑ Fct. 1.1.(3) TIME. CONST. → (0)4.0 TIME C. S. Edit the time constant in seconds in range 0.5 to 20. ↵...
  • Page 49 For systems with concentration software their specific extra displays will be added to the above list from Fct. 1.2.9 onwards. The displayed measurement function can be changed in the measurement mode by pressing ↑ key. The setting of the display output is demonstrated for the example of displaying the mass flow rate in kg/h.
  • Page 50 The setting of the display for TOTAL MASS or DENSITY is done the same way. Temperature is displayed with a fixed position of one decimal place. However, the user can choose between °C and °F. Begin from measuring mode Display line 1 line 2 →...
  • Page 51 Programming Numeric Data Various functions on the MFC 085 require numeric data to be entered by the operator. Numeric data is always entered in the following manner. Using setting FULL SCALE of current output, Fct. 1.3.3 as an example: Begin from the measuring mode: Display line 1 line 2...
  • Page 52 NOTE: Some numerical values have fixed permissible limits. For example, Menu 3.1.2., L.F. CUT OFF only allows values in the range 0 to 10%. If, for example, the operator tries to enter a value of 15%, the converter responds as follows : Display line 1 line 2...
  • Page 53 If the current output is used to indicate the direction of flow the output is as follows : Flow Current pos. 20 mA neg. 0 or 4 mA depending on range. Where the current range has a warning state, the output will jump to this current level when the meter detects an abnormal condition.
  • Page 54 Current output characteristics...
  • Page 55 Setting the frequency/pulse output (Fct. 3.4. and 1.4) The frequency/pulse output allows the transfer of one of the following measurement values : VALUE OUTPUT TYPE Mass Total Pulse Mass Flow Rate Frequency Density Frequency Temperature Frequency Volume Total Pulse Volume Flow Rate Frequency Flow Direction Binary 0 or V+...
  • Page 56 For these functions the output sends out a series of pulses where each pulse represents a fixed mass or volume. So, for example, to set the converter for 1 pulse equal to 20g, proceed as follows : Begin from measuring mode Display line 1 line 2...
  • Page 57 Set the Alarm output, Fct. 3.5.1 to either P1 SAT or ANY OP.SAT. If the pulse output saturates now the Alarm output will signal a warning. Set the STATUS MSG. function Fct. 1.2.2 to either OUTPUT or ALL MSGS. If the pulse output becomes saturated now the Status arrow on the display will be lit and the display will start to flash.
  • Page 58 Example 2 : Measured value = temperature Max temperature = 75°C Min temperature = -25°C Max frequency = 1000 Hz Temperature Frequency < - 25°C 0 Hz 0°C 250 Hz 20°C 450 Hz 75°C 1000 Hz > 95°C 1300 Hz To set up example 1, proceed as follows : Begin from measuring mode.
  • Page 59 Binary output: If the frequency output is set to signal the flow direction, Fct. 3.4.2. is suppressed and the output is as follows : Flow Direction pos. neg. 0 Volts Frequency output characteristic of example 1 and 2 Setting the process alarm output (Status) The process alarm output is a two state signal (active or inactive) that can be used to indicate a variety of meter and process states , see Table below: For all functions it is possible to define whether the output is to be active high, 24 Volts or active...
  • Page 60 ACTIVE Hysteresis, H = 2% Max Limit INACTIVE Min. Limit Max. Limit FLOW Process alarm characteristics For example, a process requires that the process fluid temperature stays within the range 30 to 40°C and the low level signal is required to indicate that the temperature has gone out of range. Begin from measuring mode Display line 1...
  • Page 61 Setting the control input (Binary) The MFC 085 has an input connection which allows certain meter functions to be controlled remotely. These functions are: - Reset totaliser - Standby - Acknowledge status message - Start zero calibration The function will be triggered when the input becomes active. For standby the converter will be held in standby for as long as the input is active.
  • Page 62 Driving the control input 5.10 Setting the system control Some applications for the MFM 4085 may require measurement to be suspended at particular times, such as during steam cleaning. The system control functions allow the converter to automatically detect user-defined conditions and then to act accordingly. Selectable conditions (Fct.

  • Page 63: Standby Function

    Begin from measuring mode Display line 1 line 2 →↑↑ Fct. (3).0. INSTALL →6x↑ Fct. 3.(7).0. SYS.CTRL.S → Fct. 3.7.(1). FUNCTION S → (OFF) ↑ (FLOW OFF) ↵ Fct. 3.7.(1). FUNCTION S ↑ Fct. 3.7.(2). REFERENCE → (TEMPERATUR) ↑ (DENSITY) ↵...
  • Page 64 Begin from measuring mode Display line 1 line 2 STANDBY ↑ 3.456 Frozen Totalizer ↑ STANDBY Whilst in this state the measuring tube still vibrates and the measurements can come back on line in an instant. There is an additional standby state, 'STOP', in this case the drive to the primary head is disabled and vibrations cease.

  • Page 65: Density Adjustment For Maximum Measuring Accuracy

    5.12 Density adjustment for maximum measuring accuracy G-Series Coriolis Mass Flow meters are factory calibrated for density prior to shipment. This calibration is based on measurements made with air and water under reference conditions. The results of this calibration are stored in the calibration factors CF1 and CF2 in menus Fct. 3.9.1 and 3.9.2.
  • Page 66 Setting the High Calibration Point Ensure that the meter is properly installed and is operating correctly. Circulate the high density fluid at a high flow rate for a few minutes to ensure that no air bubbles remain inside the meter. Adjust flow rate to the typical rate for the application.
  • Page 67 CF1 to CF4 can be found from menus Fct. 3.9.1 to 3.9.4 To find the remaining data proceed as follows. Line 1 Line 2 Notes: Fct. 3.9.(10) D. REF. HIGH → (MEAS. VALUE) ↑ (SET VALUE) ↵ 210.1234 Record this frequency value. ↵...
  • Page 68 Density of water as a function of temperature Temperature in Density in Temperature in Density in °C °F kg/m lb/ft °C °F kg/m lb/ft 999.8396 62.41999 997.0468 62.24563 32.9 999.8712 62.42197 25.5 77.9 996.9176 62.23757 33.8 999.8986 62.42367 78.8 996.7861 62.22936 34.7 999.9213...

  • Page 69: Specific Gravity

    Temperature in Density in Temperature in Density in °C °F kg/m lb/ft °C °F kg/m lb/ft 988.0839 61.68608 65.5 149.9 980.4432 61.20907 50.5 122.9 987.8592 61.67205 150.8 980.1751 61.19233 123.8 987.6329 61.65793 66.5 151.7 979.9057 61.17552 51.5 124.7 987.4051 61.64371 152.6 979.6351 61.15862...
  • Page 70 5.13.1 Referred Density (Option) Referred density is a factory-installed option which expands the type of density outputs available to three different variations - ”actual” ( normal density output ), ”fixed”, and ”referred”. Any one of these three options can be selected in Fct. 1.2.5 or Fct. 3.2.5 - the ”DENSITY” function of the ”DISPLAY”...

  • Page 71: User Data

    It is programmed by selecting ”FIXED” rather than ”REFERRED” and programming the fixed density value in that step (step #4) of the program shown in 6.13.2 where the decimal point is adjusted for ”Referred Density”. After setting the fixed density value, press 4x ↵ to return to the measuring mode.

  • Page 72: Custody Transfer Protection Code

    If the new password was entered the same both times it will be accepted, otherwise "CODE WRONG" will be displayed. NOTE: The default value of the password protection code when leaving the factory is: → → → ↵ ↵ ↵ ↑ ↑ ↑ 5.14.3 Custody transfer protection code The converter can be set for measurement with or without the custody transfer protection enabled.
  • Page 73 The default value of the custody transfer protection code when leaving the factory is ↵→↑↵↑→↵→↑ This password may be changed using Menu 3.8.7.. However, this can only be done if custody transfer protection is disabled first, as described above. Begin from measuring mode. Display line 1 line 2...

  • Page 74: Primary Head Type And Tube Parameters (Cf1-5)

    5.14.4 Primary head type and tube parameters (CF1 - 5) The primary head type and tube parameters are factory set and should not normally be changed by the customer. They are only normally needed if the converter has to be replaced in the field. In this case, the new converter must be programmed with the correct primary head type, and parameters, CF1 to CF5, must be entered as printed on the data plate.

  • Page 75: Location

    5.14.5 Location It is possible to program each unit with an individual identification number. This is especially useful if the 'SMART' option is being used. To set the location number : Begin from measuring mode Display line 1 line 2 →↑↑...

  • Page 76: Part C Special Options, Functional Checks, Service And Order Numbers

    Most of these options are hi-pot-tested to comply with the requirements of Ex and CE and if field exchanged these requirements may be violated. * Krohne will also not accept responsibility or honour the warranty if this is done. If you need an option change, please contact your nearest office for advice.

  • Page 77: Converter With Rs 485 Communication Option

    When this option is fitted only one analog 4 - 20 mA output is fitted as well. Detailed description of the Krohne RS 485 or Modbus protocol is available on request or when the meter is ordered a copy is included in the instruction package.

  • Page 78: Testing Current Output

    7.1.2 Testing current output This function allows a number of fixed current levels from 0 to 22 mA to be driven from the current output. This function interrupts the normal operation of the output, so the operator will be asked if he is sure before the test commences. Display line 1 line 2...
  • Page 79 To test the frequency, connect a frequency meter to the pulse output terminals and proceed as follows: Display line 1 line 2 Fct. 2.(2) TEST I ↑ Fct. 2.(3) TEST P → SURE (NO) ↑ SURE (YES) ↵↵ Fct. 2.3.(1) FREQUENCY →...

  • Page 80: Testing Alarm Output

    The meter now issues a stream of pulses with the set width. The running total of pulses sent is shown on the display. The test stops when either 100,000 pulses have been sent or the operator presses the ↵ key. If the counter reads a smaller number than the actual number of pulses sent, or the frequency meter under reads, then this indicates that a weak signal is reaching the frequency meter/pulse counter.

  • Page 81: Viewing Temperature And Strain

    Line 1 of the display shows the current state of the input. HI = 4 - 24 Volts, LO = 0 - 2 Volts. Line 2 shows the currently selected function of the input. As the voltage on the input changes so the display will change from HI to LO accordingly.

  • Page 82: Service And Troubleshooting

    Service and Troubleshooting Threads and ”O” Ring of the converter housing lid The screw threads and gaskets of both housing covers should be well greased at all times. Always check for signs of damage and never allow dust to accumulate. Defective gaskets and lids should be replaced immediately to maintain the integrity of the protection category.

  • Page 83: Change Of Operating Voltage And Power Fuse F9

    Change of operating voltage and power fuse F9 Always switch off power source before commencing work! Remove electronics as described in Section 8.2. 8.3.1 Replacement of power fuse F9 The mains fuse F9 of the converter, sits on the power supply board beside the transformer, as shown below.

  • Page 84: Turning The Display Circuit Board

    4 fixing bolts uniformly. Any faults resulting from failure to follow these instructions scrupulously shall not be covered by our warranty! WARNING: Ex/Hazardous duty versions may not be turned. Please order correct position at time of placing order or consult Krohne.

  • Page 85: Troubleshooting

    Troubleshooting Operational errors may be caused by: – The process medium – The installation – The measuring system Most frequently, errors occur in the measuring system when it is installed and switched on for the first time. They are normally due to incorrect installation of the primary head. When the measuring system is switched on and the converter's self-test has been carried out (Display message 'TEST') the message 'STARTUP' is displayed.
  • Page 86 The operator may inspect the message list at any time, using the RESET/ACKNOWLEDGE menu. As the operator goes through the list, if a message is marked with '≡' characters, this indicates a new warning that the operator had not previously acknowledged. At the end of the list the operator is asked to acknowledge the warnings with 'QUIT (YES)' prompt.
  • Page 87 Status messages ERROR TYPE COMMENT MESSAGES SAMPLING Severe PLL out of range SENSOR A Severe Sensor A voltage signal less than 5% of desired value SENSOR B Severe Sensor B voltage signal less than 5% of desired value RATIO A/B Severe One sensor signal much larger than the other EEPROM...

  • Page 88: Fault Finding

    Pulse output Alarm output (Status) Control input (Binary) Measurement mode and commissioning Commissioning and Start-up of the flowmeter Please check the following table of hints and advice before calling your KROHNE Service Department. Group Fault / Symptom Cause Remedy Group D...
  • Page 89 Test OK Check cabling and totalizer. Check external voltage supply Test faulty Pulse output faulty. Replace converter or call Krohne Service. Alarm output is used as Check connections as per external voltage supply, a Section 2.3. Voltage between possible electrical short-circuit terminals 5 and 4.2 approx.
  • Page 90 Section 4.5 and acknow-ledge the error message. Primary Sensor faulty Check as per Sect. 8.8 Fuse F11 blown. (negative Call Krohne Service. analog voltage). Display returns to Start- Sensor cannot vibrate Correct installation as per up and the primary sensor is freely due to poor mechanical Section 1 and try again.

  • Page 91: Checking The Primary Head

    Measurements outside Measure between: typical values: green and violet (Sensor A) 50 - 130 ohm Primary faulty white and yellow (Sensor B) Replace or call Krohne service. To check the temperature 500 - 550 ohm Measurements inside sensor (RTD): (ambient temperature typical values: Measure between blue and red.

  • Page 92: Remote Meter

    To check sensor A and B: Measurements outside Measure between: typical values: green and black 50 - 130 ohm Primary faulty (Sensor A) Replace or call Krohne orange and black service. (Sensor B) To check the temperature Measurements inside sensor (RTD): 500 - 550 ohm...

  • Page 93: Status Warnings

    Status Warnings The MFC 085 can detect a number of anomalous conditions during operation. These are classed into four groups as follows : LIGHT These include : – Mass flow >2x primary head rating. – Temperature outside operating range – Mass total overflow.
  • Page 94 If the operator selects "QUIT YES" the status arrow will disappear if the causes of the warning have themselves cleared. However, if for example the mass flow is still too large, then the arrow will remain. On returning to the measurement, however, the display will have stopped flashing. This shows that the warnings have been acknowledged by the operator even if it was not possible to clear them.

  • Page 95: Order Numbers

    Order numbers Standard Converters Order Number 100 - 240 V AC HART 2.10710100 21 - 48 V AC HART 2.10710340 24 V DC HART 2.10725100 100 - 240 V AC Multi I/O HART 2.11239020 21 - 48 V AC Multi I/O HART 2.11239040 24 V DC Multi I/O HART 2.11239060...

  • Page 96: Part D Technical Data, Measurement Principle And Block Diagram

    Part D Technical Data, Measurement principle and Block diagram Technical Data 10.1 Measuring ranges and error limits CORIMASS MFM 4085 K&KM 10 G 100 G 300 G 800 G 1500 G 3000 G Measuring ranges (*see “Reference conditions” below) Nominal flow rate 10 kg/min 100 kg/min 300 kg/min...

  • Page 97: Primary Head

    10.2 Primary head CORIMASS MFM 4085 K and KM 10 G 100 G 300 G 800 G 1500 G 3000 G Connections Flange DIN 2635 PN 40 DN 10/15 DN 15/25 DN 25/40 DN 40/50 DN 50/80 DN 50/100 ANSI B 16.5 150 lb ½”...

  • Page 98: Mfc 085 Signal Converter

    10.3 MFC 085 Signal Converter Measured quantities and units Mass flowrate g, kg, t, oz, lb per second, minute, hour, day Total mass (or total volume) g, kg, t, oz, lb (or cm , dm , liter, in , ft , imp.
  • Page 99 OPTION OPTION OPTION OPTION OPTION OPTION OPTION OPTION OPTION 2 CRNT 3 CRNT 3 CRNT 3 CRNT 3 CRNT Current Current Current & & I & & & RS485 & input,Du PULSE CONTR CONTR STATUS Modbus al phase INPUT INPUT pulse Current Outputs...
  • Page 100 RS 232 adaptor and Config. Software Product Guide 6 “Communications techniques”. Via handheld communicator. For further information see HART-System Product Guide 6 “Communications techniques”. RS 485/ Modbus Serial communications For detailed protocol information please contact Krohne die-cast aluminium with polyurethane finish Housing material...

  • Page 101: Block Diagram Of Converter Mfc

    10.4 Block diagram of Converter MFC 085...

  • Page 102: Instrument Data Plate

    10.5 Instrument data plate (Std.) 10.6 Dimensions and weights Dimensions MFM 4085 K Compact Unit In mm and (inch) 10 G 100 G 300 G 800 G 1500 G 3000 G 415 (16.34) 565 (22.24) 744 (29.29) 988 (38.90) 1115(43.90) 1400(55.12) 242 (9.55) 249 (9.80) 249 (9.80) 269 (10.60) 283 (11.14) 335 (13.19) c (with flanges) 490 (19.29) 656 (25.83) 843 (33.19) 1110(43.70) 1242(48.90) 1630(64.17)

  • Page 103: Measuring Principle

    Meters with Heating Jackets Dimensions MFM 4085 K Compact Unit In mm and (inch) 10 G 100 G 300 G 800 G 1500 G 3000 G 102 (4.02) 115 (4.53) 115 (4.53) 156 (6.14) 206 (8.11) In prep 67 (2.7) 76 (3.0) 80 (3.1) 91 (3.6)

  • Page 104: Software History

    Coriolis forces occur in oscillating systems when a mass moves towards or away from an axis of oscillation. This is illustrated by way of a simple example. A measuring tube oscillates about the neutral axis A-B. The fluid particles in the liquid product flow through the measuring tube at velocity ‘v’.
  • Page 105 If you need to return flow meters for testing or repair to KROHNE Your CORIMASS mass flow meter If the flow meter has been operated with toxic, caustic, flammable water- – has been wet calibrated in an accurate endangering liquids, kindly flow meter test rig.

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