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SPM Machine Guard MG4 A Instruction Manual

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Instruction Manual
Machine Guard
SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden
Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com
MG4 A
TM
Technical data are subject to change without notice.
ISO 9001:2000 certified © SPM 2014-02 71945 B

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Summary of Contents for SPM Machine Guard MG4 A

  • Page 1 Instruction Manual Machine Guard MG4 A SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 3: Table Of Contents

    Trouble shooting ..............54 Programming guide ............. 55 SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 4 Before should be used. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 5: Machine Guard Mg4

    With the password set to ON, you can see the channel configurations but are unable to make changes. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 6: Five Basic Mg4 Versions

    MG4-22A 2 channels VIB plus 2 channels SPM. A vibration measurement returns one value (mm/s RMS). For SPM, you can select one of two techniques: SPM dBm/dBc (returns the maximum value dBm and the carpet value dBc), or LR/HR (returns LR value, HR value, LUB number and condition codes). The measuring results can be put on any of the available analog output channels and connected with any of the relays.

  • Page 7: Mechanical Installation Of Mg4

    80% for temperatures up to 31 °C decreasing linearly to 50% relative humidity at 40 °C. For SPM shock pulse transducer 42000 and 40000 plus TMU (transducer matching unit), the maxi- mum cable length is 100 m. For the SPM shock pulse transducer 40000 without TMU, the maximum cable length is 4 m.

  • Page 8: Electrical Installation Of Mg4

    Read the Safety Precautions on page 2 before performing electrical installation. If you are in doubt, please contact your local SPM representative before installing the equipment. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.
  • Page 9 (fig.1) or to TNC connectors (op- tion) underside of the unit. The TNC connectors for SPM are always closest to the front panel, the connectors for VIB closest to the rear side of the housing. Please note that the number of TNC connectors depends on the MG4 version (here MG4-22A, other versions see next page).

  • Page 10: Terminal Configurations

    OK (open or short circuit for VIB, TLT value below 15 for SPM). This will cause the connected analog output to go to approx. 0 mA. When TLT = OFF, the analog output will go to 4 mA in case of TLT fault.

  • Page 11: Connection To Rs-485 Network (Lan)

    Twisted pair cable with shield Rt = Termination resistor (120 ohm) SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 12: Connection To Plc Via Analog Output

    DO = Digital Output 0 or 24 V to an external relay DCS = Distributed Control System SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 13: Measuring Logic Controlled By The Plc

    All measuring results collected by the MG4 unit during normal crusher operation are ignored. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 14: Using The Analog Current In Other Devices

    10 V DC to the devices in the loop. This puts a limit on the number of devices and the cable length. Including cable resistance, the max. loop resistance is 400 Ω. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 15: Programmed Measuring Parameters

    Programmed measuring parameters The measuring and alarm parameters of an MG4 are programmed, using the keys on the front panel. The program is password protected, which means that a the password ‘SPM’ has to be input before any parameter can be changed.

  • Page 16: Reset Default Parameters

    Range for 4 - 20 mA ..0 to 50 mm/s Alarm limit A2 ....-- dBsv SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 17: The Version Menu, Version And Setup

    Press ENT to open the first one, VERSION (B). This shows the MG4 version, the vibration measuring range and the shock pulse transducer type. On line 4 you see the version numbers of the three processors CPU, VIB, and SPM. None of these settings can be changed. Press ENT to exit to the VERSION menu.

  • Page 18: The Version Menu, Password And Stand-By

    Measuring = OFF means that the analog and relay outputs are frozen (stand-by mode). This set- ting is selected before disconnecting any of the VIB or SPM input channels, else disconnecting a transducer will cause a system fault alarm.

  • Page 19: Lan Settings (Modbus Rtu)

    - MG4 unit type ID. The protocol for Modbus using RTU is described on page 49. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 20: Programming A Vibration Channel

    Select type of transducer on menu (B) with the keys UP and DOWN. Default values for sensitivity and min/max bias will automatically be set when a standard SPM vibration transducer is selected. On menu (C), the variable parameters are the transducer sensitivity value (0.9 – 12.0 mV/m/s ) and min/max bias values (2 –...
  • Page 21 When stepping with UP or DOWN, only free channel numbers are displayed. Because each SPM measurement returns two values, you can have more signals than analog chan- nels. In case all channels are occupied, you have to break the previous links before you can assign a different signal to the analog channel.

  • Page 22: Programming A Shock Pulse Channel For Dbm/Dbc

    RIGHT and LEFT. The first line contains the channel name, which can be changed. ”TLT” on line 2 of menu (A) shows the transducer line status. For an SPM channel it is a number expressing the quality of the measuring circuit. Normal values are around 20, the lowest accept- able value is 15.

  • Page 23: Programming A Shock Pulse Channel For Lr/Hr

    (A) contains the channel name (can be changed), the evaluation results CODE, LUB, and COND, plus the present TLT value. For an SPM channel, TLT is a number expressing the quality of the measuring circuit. Normal values are around 20, the lowest acceptable is 15. TLT values below 15 invalidates the SPM condition evaluation because the input signal quality is poor.

  • Page 24: The Effect Of Alarm Delay

    Alarm is reset automatically when the alarm condition (high measured value) is terminated. There is no manual reset. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 25: Stand-By Mode

    Thus, there is no TLT alarm when an incoming signal line is disconnected. The transducer cable can then be connected to a hand-held instrument. For the SPM measurement, the instruments Leonova /T30/A30 accept both transducer types, 40000 (plus TMU) and 42000. For vibration measurement, the instrument Leonova accepts the transducer type SLD144.

  • Page 26: Vibration Transducers

    –20 to +125 °C (4 to +260 °F). The coaxial cable SPM 90005-L is specified –25 to +70 °C (–13 to +158 °F). The measuring cable SPM 90267-L is specified –55 to +150 °C (–67 to +302 °F).

  • Page 27: Vibration Transducer Installation

    M8 and 5.5 mm for UNF 1/4”. Torque and unscrew the transducer with a 17 mm torque wrench. The torque is 10 Nm. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 28: Selection Of Spm Measuring Point

    C The measuring point shall be located within the load zone of the bearing. SPM’s evaluation rules and the condition scale are not valid if a measuring point does not conform with these rules. However, a measuring point that comes at least close to the requirements will yield consistent if somewhat low readings.

  • Page 29: Examples Of Spm Measuring Point

    In moist environments, use cables with sealed connectors (D). SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 30: Installation Of Shock Pulse Transducers

    TNC connector, the transducer is connected to the MG4. In moist environments, a sealing TNC connector SPM 13008 must be used. An angle connector used in narrow spaces. With the extended transducer one can reach bearing housings below protecting covers, etc.
  • Page 31 (6.5) Installation of shock pulse transducers An SPM installation is useless if signal strength is lost through incorrect transducer installation. The transducer’s conical seat surface must have firm contact with the material of the bearing housing. Drill and thread to the required depth, and torque correctly. Try to point the transducer straight at the bearing.

  • Page 32: Vib - Vibration Severity Monitoring

    ‘acceptable’ range (yellow alarm) and the lower limit of the ‘unacceptable’ range (red alarm, see next page). SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 33: Machine Classes

    2.6 (2 steps). 3 steps up is a fourfold increase. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 34: Spm - Shock Pulse Measurement

    Vibration monitoring records a continuous complex motion (which even contains shocks), while the SPM method targets the shocks and filters out the vibration. This is a short and simplified summary of some important facts needed to understand the basic input data for bearing monitoring as well as the nature and use of the shock pulse transducers.

  • Page 35: The Difference Between Dbm/Dbc And Lr/Hr

    The signal from a shock pulse transducer consists of a train of stronger and weaker electric pulses, analog to the shock pulses emitted by the source. SPM has developed two quantifying techniques for this shock pulse pattern: dBm/dBc and LR/HR. MG4 can handle either, depending on the setting.

  • Page 36: The Dbm/Dbc Technique

    • red for 35 dBn and more = bad condition. 21 and 35 are the recommended alarm limits for the maximum value dBm. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 37 Above 45 dB, the failure risk is very high. If the bearing cannot be replaced at once, carefully moni- tor the trend of the readings: the steeper the curve, the greater the failure risk. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 38: The Lr/Hr Technique

    • COND condition number, shown with CODE C, D and increasing with the degree of bearing damage. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 39 Please note that this also requires a signal from a correct SPM measuring point. A dampened signal (or a minimal load on the bearing) tends to place the bearing too far to the left of the centre.
  • Page 40 In roller bearings, there is line contact, which means that the area under pressure, where the shock pulses occur, is much larger. For SPM purposes, bearings are grouped into 8 different types, each with a TYPE number 1 through 8. The types are described in the table above.
  • Page 41 The COMP no. (compensation number) is used to calibrate the measuring point, to compensate for a somewhat weaker signal from a measuring point that does not quite comply with the SPM rules. A weak signal can place the bearing outside of and to the left of the evaluation frame. Typical cases are fan side bearings on electric motors, which often do not carry any load.
  • Page 42 At best, the dynamic range between green and yellow is about 10 dBsv. To be on the safe side, SPM recommends to use the LR (or HR) value displayed with CODE A and add 6 for yellow alarm and 8 for red alarm.
  • Page 43 SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.
  • Page 44 E3 = signal too low can often be remedied by setting a COMP number. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.
  • Page 45 11 – 13 V (12 V) * Individual value given on the calibration chart. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 46: Transducers

    10 Nm (7.4 lbf/ft) * Individual value given on the calibration chart. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 47 15 Nm, max. 20 Nm Connector: TNC jack SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 48 15 Nm, max. 20 Nm Connector: TNC jack SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 49: Transducer Matching Unit

    Fastening screws 2 x M4, stainless steel SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 50: Standard Cables For Transducers

    This is the range of ready made standard cables used for permanently installed vibration transducers and shock pulse transducers. When ordering, please state the desired cable length (L) in meters. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 51: Protocol For Modbus Network Using Rtu

    Register 1 crc16Hi crc16Lo SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com ISO 9001:2000 certified © SPM 2014-02 71945 B...
  • Page 52 Data Hi register= Not defined Data Lo register= Alarm level (0 – 63H). SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 53: Exception Response

    The same response is made when the number of registers is not valid. Code 02 is the only exception code in MG4. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice.

  • Page 54: Technical Specifications

    1140 g (MG4-12A), 1150 g (MG4-22A) SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 55 When once the life cycle of the product is over You can return it to Your local SPM representative for correct treatment, or dispose it together with your other electronic waste.

  • Page 56: Trouble Shooting

    Lock up with password, see page 16. programmed. SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

  • Page 57: Programming Guide

    Alarm delay -- to 600 s SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...
  • Page 58 Serial no........Date ........Sign..........SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden Technical data are subject to change without notice. Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com...

This manual is also suitable for:

Machine guard mg4-02aMachine guard mg4-1aMachine guard mg4-2aMachine guard mg4-12aMachine guard mg4-22a

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