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Load Monitoring Units

LMU 212 and LMU 217

User’s manual

Via Paolo Uccello 4 - 20148 Milano

Tel +39 02 48 009 757 Fax +39 02 48 002 070 [email protected] www.dspmindustria.it

Содержание LMU 212

Страница 1: ...Load Monitoring Units LMU 212 and LMU 217 User s manual Via Paolo Uccello 4 20148 Milano Tel 39 02 48 009 757 Fax 39 02 48 002 070 info dspmindustria it www dspmindustria it...

Страница 2: ...responsibility for errors or omissions Additionally no liability is assumed for any damages that may result from the use of the information contained within this publication Copyright Copyright 2008...

Страница 3: ...pare the date of this manual with the revision date on the web site then refer to the manual s Table of Revisions for any changes updates that have been made since this edition Table of Revisions Date...

Страница 4: ...lection of the application 20 2 4 8 Division of the transducer signal or the input voltage Ui p by two 21 2 4 9 Use without transducer 22 3 Calibration 23 3 1 Electrical calibration standard 23 3 1 1...

Страница 5: ...ation of the SWA micro switches 18 Fig 2 9 Examples of switching delays 20 Fig 2 10 Potentiometer location on the load monitoring unit board 21 Fig 2 11 Location of the SWB micro switches on the load...

Страница 6: ...nd to facilitate understanding through reiteration Summary of the different chapters Chapter 1 Introduction Contains the technical data sheet of the load monitoring units LMU 212 and LMU 217 and gives...

Страница 7: ...ttention otherwisethe personal safety ofthe operator or third party may beat risk The reader mustabsolutely take note of the accompanying text and act upon it before proceeding further RISK OF ELECTRO...

Страница 8: ...odels of load monitoring units are available LMU 212 basic model LMU 217 model combining two LMU 212 placed side by side LMU 216 model combining one LMU 212 and a control module Note Only the two firs...

Страница 9: ...ies the output signal of full bridge strain gauges Load Monitoring Units are flexible and fully configurable due to DIP switches and jumpers which allow the unit to be easily installed no solder conne...

Страница 10: ...0 to 20 mA DC Max Current Range 0 to 25 mA DC Max Load 500 for Imax 20 mA Output Impedance 50 k Voltage Output Max Dynamics 10 V EM Max Load 10 k 0 5 1 k 5 Output Impedance 50 in series Output for Aut...

Страница 11: ...startup the stored digital value is substracted from the input signal after D A conversion Current interruptions lasting for less than 30 ms do not lead to the loss of the stored calibration value Re...

Страница 12: ...M 27 N 30 P 35 mm A 122 B 82 C 220 D 204 E 16 G 20 75 J 13 4 K 90 L 1 5 M 28 N 47 C D G E B A M N K J L Mounting screw M6x30 Sealed diecast aluminum box Stuffing glands cable 5 to 12 mm Stuffing gland...

Страница 13: ...7 3001 E mail magtrol magtrol ch www magtrol com Subsidiaries in Great Britain Germany France China India Worldwide Network of Sales Agents Ordering Information LMU US 04 10 orDering inForMation LOAD...

Страница 14: ...h other their mounting and the connection procedures are very similar 1 Select a suitable mounting place free of vibrations An instrument support for instance offers excellent results 2 Trace the loca...

Страница 15: ...Chapter 2 Installation Configuration M6 washer Housing M6 x 30 fixing screw Load monitoring unit housing Tap on the mounting surface Load monitoring unti cover Cover fixing screw 82 204 Fig 2 1 Insta...

Страница 16: ...pter 2 Installation Configuration M6 washer M6 x 30 housing fixing screws Load monitoring unit housing Taps on the assembly surface Load monitoring unit cover Fixing screw for cover 272 175 Fig 2 2 In...

Страница 17: ...ugh the hex nut the internal gasket when used the external gasket the sealing ring and the main body d Reassemble the stuffing gland and coat the front part of the external gasket with silicone see fi...

Страница 18: ...LMU 217 is composed of two LMU 212 2 4 1 Adaptation of the monitor to the available supply unit 2 4 1 1 Supply voltage Before connecting the LMU 212 or LMU 217 load monitoring unit select its operati...

Страница 19: ...in its support according to the following table Operating voltage Supply terminals Fuse Switch 0 V 18 N 19 P 20 230 VAC earth neutral phase 80 mAT 230 V 115 VAC earth neutral phase 160 mAT 115 V 48 V...

Страница 20: ...THERETO Fig 2 6 LMU grounding when using a 230 115 or 48 VAC supply Connect the earth wire to the ground screw and the LMU terminal n 18 to the ground screw Warning When using a 48 115 230 VAC supply...

Страница 21: ...bration form see Appendix A 2 4 3 Designation of the voltage and current inputs outputs The LMU load monitoring unit is fitted with a voltage input UI P and also with two outputs one for voltage UO P...

Страница 22: ...hysteresis value for the relay REL1 Condition Configuration Effect SWA4 SWA5 SWA6 REL1 de energised for F Flevel1 ON OFF Detection for UO P Ulevel1 REL1 de energised for F Flevel1 OFF ON Detection fo...

Страница 23: ...dition Configuration Effect SWA7 SWA8 SWA9 REL2 de energised for F Flevel2 ON OFF Detection for UO P Ulevel2 REL2 de energised for F Flevel2 OFF ON Detection for UO P Ulevel2 Hysteresis 0 5 OFF Hyster...

Страница 24: ...e output of the LMU UO P is instantaneous UO P t Uthreshold 1 or 2 ON ON OFF D OFF F Fthreshold 1 or 2 REL 1 or 2 energised REL 1 or 2 de energised REL 1 or 2 energised UO P t ON ON OFF D OFF F Fthres...

Страница 25: ...umber of turns to be applied to the potentiometers using the following formula N D 0 01 0 170 with N number of turns to be applied to the potentiometer D switching delay required for the relay in seco...

Страница 26: ...B1 SWB2 SWB3 SWB4 SWB5 SWB6 SWB7 SWB8 DC to 100 Hz OFF OFF OFF OFF OFF OFF ON ON DC to 10 Hz OFF OFF OFF OFF ON ON OFF OFF DC to 3 Hz OFF OFF ON ON OFF OFF OFF OFF DC to 1 Hz ON ON OFF OFF OFF OFF OFF...

Страница 27: ...rd the selected strain gauge sensitivity as well as the configuration of the micro switches SWA1 SWA2 and SWB10 on the configuration and calibration form see Appendix A 2 4 7 Selection of the applicat...

Страница 28: ...two The LMU load monitoring unit allows the user to divide the transducer signal or and the voltage input UI P by two This can for instance happen in the case of an application A B with A as the trans...

Страница 29: ...igure 2 13 and the following table 1 20 23 24 21 22 J P 5 J P 7 J P 6 J P 8 Fig 2 13 Location of the transducer presence simulation jumpers Transducer presence simulation jumper Jumper on Activated JP...

Страница 30: ...e voltage output No load must be applied on the transducer The micro switch SWB9 see figure 3 3 must be OFF The micro switch SWC2 see figure 3 2 must be ON Proceed as follows to carry out the zero adj...

Страница 31: ...inal UO P nominal 10 VDC UO P known Fknown 2 To determine the rating of the voltage output carry out the following calculation UO P known 10 V Fknown Fnominal 3 Connect a numerical milliampermeter bet...

Страница 32: ...O F F O N 9 1 0 SWC micro switches Fig 3 2 Location of the micro switches SWC3 and SWC4 on the load monitoring unit board Calculate the threshold voltages in relation to the voltage output UO P UO P...

Страница 33: ...onitoring unit 2 Adjust the potentiometer P9 to obtain a reading of UO P level2 with an accuracy of 20 mV Figure 3 1 indicates where the potentiometers P1 to P10 are located 3 Turn the potentiometer P...

Страница 34: ...Completely unload the axis the crane hook 2 Measure the output voltage between terminals 15 and 9 3 Adjust the output voltage to 0 V with the potentiometers P6 and P7 3 2 2 2 Nominal load 1 Load the...

Страница 35: ...been carried out No load must be applied to the transducer The micro switch SWB9 see figure 3 3 must be on position ON The calibration is carried out as follows 1 Connect a digital millivoltmeter bet...

Страница 36: ...e load monitoring unit at the end of the chain It is however possible to pick up the measuring signal at the level of each element of this chain 4 1 1 Using one single load monitoring unit LMU 212 In...

Страница 37: ...ther The measuring signal of the transducer A is processed by the first load monitoring unit Its voltage output is then sent to the voltage input of the second unit The measuring signal of the transdu...

Страница 38: ...ge output of the first unit is connected to the voltage input of the second unit and added to the processed measuring signal of the transducer B The voltage output of the second unit is connected to t...

Страница 39: ...nce of the resulting chain must be greater than 75 4 3 Operational check of the measuring chain OK Each load monitor is fitted with an OK input OKI P and output OKO P for the operational check of the...

Страница 40: ...the current output IO P terminal 10 grounding 7 current 20 mADC Another method of localising a default is to interrupt the line OKI P OKO P between the load monitoring units and then short circuit te...

Страница 41: ...ate the function two possibilities are available connect the B I T E control input terminal 23 to the ground terminal 24 see figure 4 6 send a low active CMOS TTL compatible control signal see followi...

Страница 42: ...s if the LMU has been configured with a 0 3 Hz filter 3 Check the correct operation of the relays REL1 and or REL2 depending on the setting Measure the voltage UO P and the current IO P by means of a...

Страница 43: ...ed Configuration and calibration report Description of the test bench drawing photographs sketches etc Description of the tested object drawing photographs sketches etc Description of the test cycle T...

Страница 44: ...11 and LMU 217 224 217 000T011 load monitoring units joined in this appendix have to be filled in with the utmost care and placed in the load monitoring unit housing under its cover When the unit need...

Страница 45: ...DELAY D1 s P1 DELAY1 ADJ CONDITION SWA4 SWA5 F Flevel1 F Flevel1 ON ON OFF OFF SWA6 HYST OFF 0 5 ON 5 ADJUST P3 LEVEL 1 F level1 kN UO P level1 V REL2B REL2A REL2C D20 CH OK DELAY D2 s P2 DELAY2 ADJ...

Страница 46: ...T ADJUST 0 V 23 24 0 V B I T E 0 V U1 I P 0 V BRIDGE PRESENCE SIMULATION YES NO JP5 JP6 JP7 JP8 USED ONLY WITH MEM 783 J12 24V 15V 0 V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 C b U2 I I P 0...

Страница 47: ...r VDC N 0 V E AC DC 15V 15V 0 V ref 15 5 6 4 2 3 1 9 10 EXTERNAL SIGNAL NAME 17 REL1B REL1A REL1C D19 CH OK DELAY D1 s P1 DELAY1 ADJ CONDITION SWA4 SWA5 F Flevel1 F Flevel1 ON ON OFF OFF SWA6 HYST OFF...

Страница 48: ...41 Appendix B CE Conformity Declaration...

Страница 49: ...n repair service under this warranty purchaser must forward the product transportation prepaid and a description of the malfunction to the factory The instrument shall be repaired at the factory and r...

Страница 50: ...est Mesure and Control of Torque Speed Power Load Force Weight Tension Displacement Via Paolo Uccello 4 20148 Milano Tel 39 02 48 009 757 Fax 39 02 48 002 070 info dspmindustria it www dspmindustria i...

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