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Machine Guard MG4-REF11 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 • [email protected] • www.spminstrument.com

ISO 9001:2000 certified © SPM 2017-09. 71947 B

Installation of shock pulse transducers

Transducers and measuring cables should be installed in such a way that they do not hinder the
normal operation or the general activities around the machine. Correct installation is very important
because it influences the strength of the shock signal and thus the measuring results

The shock pulse transducer 42000 is installed in a threaded, countersunk mounting hole. Stand-
ard thread size is M8, with UNC 5/16” as an alternative. Via a coaxial cable with TNC connectors,
45011-L, the transducer is connected to the MG4-REF11A.

Operations

•

Selection of measuring point

•

Drilling, countersinking, threading and clearing of the mounting hole

•

Torquing with torque wrench

•

Connection of cable.

Special tools

•  Countersink with 90° angle, diameter 12 mm, and pilot 6.8 (6.5) mm
•  Drill bits 3.0, and 6.9 (6.6) mm
•  Torque wrench with a long 17 mm socket.

Installation material

•  Clean grease
•  Cable clamps for 5 mm cable
•  Self-threading screws M3
•  As needed, elastic sealing material for through holes.

45011-L

Mounting hole

min. 15 mm

Space

min. 100 mm

Correct signal Damped signal

42000

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Содержание Machine Guard MG4-REF11A

Страница 1: ...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 2017 09 71947 B Instruction Manual Machine GuardTM MG4 REF11A ...

Страница 2: ......

Страница 3: ...med measuring parameters 9 Reset default parameters 10 The VERSION menu version and setup 11 The VERSION menu password and stand by 12 Programming a vibration channel 13 Programming a SPM channel 15 Automatic adjusting of gain 16 The effect of alarm delay 17 Vibration transducers 18 Vibration transducer installation 19 Installation of shock pulse transducers 20 Installation of vibration transducer...

Страница 4: ... can sometimes be eliminated by using air hydraulic or handpowered tools These are especially useful in harsh conditions 1 4 System Components To ensure optimum safety for user and environ ment only original system components available from SPM should be used When using non original components the compliance with EU directive with respect to electric safety EMC and machine safety is not guaranteed...

Страница 5: ...s of the channel with the worst condition The yellow status light indicates system fault The display shows the measuring result on both channels On pressing SET the cursor will be on channel 1 and the status light will correspond to the result on channel 1 With SET one can step through all channels Pressing LEFT or RIGHT opens a window where you can see the instrument version set measuring unit an...

Страница 6: ...itude During normal operation the instrument reading is 20 60 If the discs run together the meas ured value exceeds an alarm limit see default settings and a relay is activated which gives signal to open the disc gap A vibration transducer B is also fixed to the refiner housing The vibration measurement returns one value mm s RMS according to ISO standard 2372 The measuring results can be put on a...

Страница 7: ... hole di ameter is 4 mm If possible do not mount the unit against vibrating machine parts The max continuous vibration level should not exceed 5 mm RMS The casing material is polycarbonate PVC dimensions 200 x 144 x 77 mm The casing is classed IP65 The cable inlet M12 for vibration measuring cable is tight for cable diameters 3 to 6 5 mm The cable inlet Pg11 is tight for cable diameters 5 5 to 10 ...

Страница 8: ... rear side of the cover shows the channel layout Power supply The supply voltage can be 230 V AC or 115 V AC Note that the power connection is labelled with the factory set supply voltage for the unit The fuse is a slow glass tube fuse rated T32mA The cable inlets Pg11 are tight for cable diameters 5 5 to 10 mm An adequately rated power cord should be used The supply power should come via an exter...

Страница 9: ...les with diameter 5 mm IP65 Relays The relay specifications are 250 Vac 5 A 1250 VA for the main relay Relay 1 connectors 4 5 The four secondary relays are specified 125 Vac 1 A 60 VA 150 Vdc 1 A 30 W As default the relays are NC normally closed and open on alarm or power failure You can change that to NO normally open when programming the unit see page 11 Analog outputs The four analog outputs fi...

Страница 10: ...nalog output To connect an MG4 REF11A unit to a PLC one uses a shielded cable with twisted conductor pairs The analog 4 20 mA outputs of the MG4 REF11A are connected to an AI unit analog input the relays to a DI digital input unit The condition monitoring parameters are set up in the MG4 REF11A Control display and data storage are handled by the PLC PLC Programmable Logic Control CPU Central Proce...

Страница 11: ...d with the same relay The length measuring unit can be set to either mm or inch under SETUP on the VERSION menu There you can also set TLT to OFF TLT is the transducer line test For the VIB channel this test checks for interruption or short circuit in the cable between vibration transducer and MG4 REF11A or in the transducer itself For the SPM channel the test checks the characteristics of the who...

Страница 12: ...ce below the RIGHT and to the right of the DOWN but ton Pressing SET while holding down this invisible RESET button restores the default parameters The message Def init default initiation is displayed while the reset takes place These are the default settings SPM channel Working point 30 TLT Alarm relay 5 A1 max 70 relay 1 A2 min 10 relay 2 Analogue out 1 Analogue out 2 dBsv absolute value of dBc ...

Страница 13: ... to the setting to be changed The UP or the DOWN key toggles between the length measuring units mm and inch This setting affect the vibration velocity reading mm s or inch s Set or measured values are automatically recalculated when the unit is changed Contrast means display contrast changed with UP and DOWN You can see the change when repeatedly pressing one of these keys The TLT function is togg...

Страница 14: ...rd menu B with the cursor on the first of three positions marked Press and hold down UP until the first position reads the required letter Step to the next position with RIGHT use UP to set the next letter and step to the next position with RIGHT and set the last letter You can also use the DOWN key to change letters and go to the previous position with LEFT With ENT you exit to the VERSION menu I...

Страница 15: ...me is also shown on the following programming menus TLT line 2 on menu A means transducer line test and shows the transducer line quality For a VIB channel it can be OK no fault H high interrupted circuit or L low short circuit Line 3 on menu A contains a parameter the ISO machine class number Setting one of the num bers 1 to 6 will automatically set the limit for unacceptable vibration as alarm l...

Страница 16: ...larm limits menu removes the machine class information see previous page A The alarm level A2 min is default 0 5 mm s System alarm TLTA and the two alarm limits A1 and A2 can be linked to any of the available relays by setting the relay number 1 to max 5 Each relay can be linked to more than one alarm cause The setting means no link to a relay On the menu E you set the link to an analog output cha...

Страница 17: ...10 Both limits are relative values based on dBc values A1 and A2 will trigger the relays and change the evaluation in green red indicated by the status LED display System alarm TLTA and the two alarm limits A1 and A2 can be linked to any of the available relays by setting the relay number 1 to max 5 A relay can be linked to more than one alarm cause The setting means no link to a relay On the menu...

Страница 18: ... YES with SET B and press ENT The automatic adjusting of gain is activated C When the gain is adjusted the display goes back to the measuring mode The SPM values are relative changes in the strength of the shock pulses generated in a machine during various stages of its operation Variations between machines are without significance for the functioning of the monitor provided that the measuring ran...

Страница 19: ...t Alarm level Alarm activated The effect of alarm delay Alarm delay is set in steps of 2 seconds to max 600 seconds 10 minutes During the delay time the measured value has to be constantly above the alarm level else the delay is interrupted and measurement continued without triggering a relay or changing the status light First after a full delay period the relay is triggered Alarm is reset automat...

Страница 20: ...figuration The transducer is mounted against a smooth flat surface on the machine Transducers of type SLD have thread size M8 or UNF1 4 They have SMB connector for coaxial cable or 2 pin connector for twisted pair cable TRV 18 and TRV 20 have thread size M8 while TRV 19 and TRV 21 have thread size UNF 1 4 28 Transducers of type TRV are delivered with three washers for adjusting the connector angle...

Страница 21: ...of which changes the output direction 90 The coaxial cable must be clamped close to the trans ducer A sealed cable plug should be used for installations inmoistenvironments As a rule an insulation foot either TRX 18 for M8 or TRX 19 for UNF 1 4 28 should be used to provide electric insulation when using transducers of type TRV The reason is that differences in earth potential between transducer an...

Страница 22: ...esults The shock pulse transducer 42000 is installed in a threaded countersunk mounting hole Stand ard thread size is M8 with UNC 5 16 as an alternative Via a coaxial cable with TNC connectors 45011 L the transducer is connected to the MG4 REF11A Operations Selection of measuring point Drilling countersinking threading and clearing of the mounting hole Torquing with torque wrench Connection of cab...

Страница 23: ...his recommended drill bit is 0 1 mm above standard size to prevent the pilot from jamming and breaking 3 Countersink the hole using a 90 countersink with pilot 6 8 6 5 mm Countersinking depth is min 2 mm max 4 mm min 1 mm at the shallowest point when the transducer is mounted at an angle to the surface of the bearing housing 4 Thread the hole for M8 UNC 5 16 to a depth of min 13 mm 5 Blow the chip...

Страница 24: ...hine structure The measuring unit is mm s inch s The RMS value displayed by the MG4 REF11A is a good general indicator of machine condition but it does not allow conclusions as to the causes of excessive machine vibration The cause can be unbalance misalignment structural weakness or a combination of these The measuring point has to be selected so that the transducer delivers a representative sign...

Страница 25: ...eavy foundations IV Large prime movers and machines on soft foundations VI Machines and mechanical drive systems with reciprocating masses machines with rotating slack coupled masses beater shafts vibrating screens and vibration inciters Motor power and types electric turbine diesel machine size and foundation stiffness concrete base metal frame etc will give a first indication of machine class Mo...

Страница 26: ...transducer housing Technical data Transverse sensitivity max 10 Typical base strain sensitivity 0 01 m s2 µ strain Max peak acceleration 600 m s2 60 g Settling time 3 sec Temperature range 40 C to 125 C 40 F to 260 F Power requirements 12 to 24 V 2 to 5 mA Casing Stainless acid proof steel Sealing IP66 67 together with appropriate connector Isolation Case isolated 1 Mohm Torque limit 10 Nm 7 4 lbf...

Страница 27: ...ector must be secured with a clamp close to the transducer In moist environments use sealing TNC cable plugs SPM 13008 to prevent cable corrosion For electric insulation use insulation foot TRX 18 19 Technical data Nom sensitivity main axis TRV 18 TRV 19 1 2 mV m s2 TRV 20 TRV 21 4 0 mV m s2 Transverse sensitivity max 10 Typical basestrain sensitivity 0 01 m s2 μ strain Linear frequency range TRV ...

Страница 28: ...005 46058 L PVC cable 25 to 70 C ø 5 mm 90005 45011 L Measuring cables Transducer Connector type Coaxial cable data Straight crimp 93022 PVC sleeve 81018 Straight crimp 93022 TNC Connector type PVC cable 25 to 70 C ø 5 mm SPM 90005 Straight crimp 93022 PVC sleeve 81018 2 pin connector 15168 46081 L Standard cables for transducers This is the range of ready made standard cables used for permanently...

Страница 29: ...a countersunk mounting hole on the machine as close as possible to the shock sources Thread size is M8 with UNC 5 16 as an alternative Transducer housing and base are made of stain less acid proof steel suitable for aggressive environments The transducer is normally connected via a meas uring cable 45011 L with TNC crimp connectors SPM 45011 L Mounting hole min 15 mm Space min 115 mm Technical dat...

Страница 30: ...lay 1 250 V AC 5A 1250 VA Secondary relays 4 125 V AC 1A 60 VA 150 V DC 1A 30 W Power supply 230 V AC 115 V AC 10 Power consumption max 6 VA Operating temperature range 0 to 50 C 32 to 122 F Relative humidity max 95 Altitude up to 2000 m Casing polycarbonate PVC IP65 TNC connector silver plated brass 10 to 15μ Display screen LCD 4 x 16 characters back lighted Status display green yellow red LED Di...

Страница 31: ...ity 0 9 to 12 0 mV m s2 type SLD or TRV 18 19 20 21 with isolated installation foot TRX 18 19 Shock pulse channel SPM Shock pulse method dBm dBc Measuring time approx 0 4 s Measuring range 0 to 99 dBsv Resolution 1 dB Alarm limits 2 programmable A1 max and A2 min Alarm delay 0 to 600 seconds steps of 2 s Fault indication transducer line test of measuring circuit quality every 2 min Transducer type...

Страница 32: ... supply and the cable connec tions see manual page 6 Check the glass tube fuse see page 6 Check the TLT status see page 13 VIB transduc ers and page 14 15 SPM transducers Check with a correct transducer connected di rectly to the MG4 input Check that the coaxial cable and the connectors are correctly mounted and not damaged See above TLT fault Check the measuring point and the transducer installat...

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