Valve Expert Plotter (user manual) - English
Contents
1. 2 4 z Channel AC Syst mes d port s Les tensions OC sant E utiles pour mesurer Configuration du terminal des ph nom nes qui Diff rentiel varient lentement avec le temps comme la Mise l chelle personnalis e temp rature la TP a BH p pression ou la contrainte Mesure de la tension Ps bar i 5 mesurer ou lire la Les tensions AC en revanche sont des Go Cadencement de la t che 4L D clenchement de la t che augmentent r duisent is i ou inversent Mode d acquisition constamment la polarit La plupart des lignes lectriques acheminent une 1 chantillon sur demande 1 chantillon horloge mat rielle GIN chantillons O En continu Fr quence Hz 20k Param tres d horloge Echantillons lire o 50000 e v Il s agit de la liste des Param tres d horloge avanc s voies virtuelles Type d horloge Front actif Source d horloge Effectuez un clic droit sur une voie virtuelle Interne v Montant pour la renommer mmm i changer la voie physique qui lui est associ e ou pour la supprimer de la liste Si un ast risque apparait c t d une voie virtuelle globale nit T che NI DAQ mx Anschlussplan la voie comporte des v t dil di i r mt We have stated that the AII input will be used for supply pressure Now it is necessary to set the pressure boundaries The pressure transducer having a2. Devil 401 407 Channel Ald AlS Alb BF l AIO Al AIS Analyser Task Plotter T ask AL A00 Channel SCB 66 De v1 0 mee Esportation termin e Enregistrer le rapport Pr c dent Terminer Annuler 3l Hardware Micro computer PC Asus Pundit R350 Platform computer Intel Pentium 4 3 GHz microprocessor RAM 512 MB HDD 160 GB hard disc NEC16xDVD RW compact disc driver MS Windows XP software 32 DAQ Data acquisition card LE Tu PL E OLI LE HESS eng TETTE TTE imm National Instruments M Series PCI 6229 16 differential analog inputs 500 kHz 16 bits only 8 analog inputs will be used one of them being intended for command signals generated by the test rig potentiometer 4 analog outputs 833 kHz 16 bits an output will be used for command current to be applied to the servovalve 2 counters 32 bits they may be used to measure the flow with VSE flowmeters 48 digital inputs and outputs 33 BNC interface card with housing and connectors Screened cable 34 ELOET 1939L 19 monitor It is a tactile monitor with rear mounting plate It has a tight injection moulded housing It may be used in a rude environment and serve as a command desk by touching thus replacing the mouse and the keyboard The monitor provides angle of vision 170 x 170 brightness 250 cd m contrast ratio 1000 1 resolution 1280 x 1024 25 HP DeskJet 5
3. Idy dx gt D 10 001 F Hz dy dx D 0 01 F Hz D level fiooo DC AO AC 400 4 Overlay Channels Template Analysis Lond f Clear Pen Load Data BO chaste needa Jere Var feel RU tout Yond Beton rut D LES toco pee ter pos too VERS i i i i i Exit the program The figure above shows the page of the alternating current generator This page provides the access to other pages such as Analyze to perform analyses and to display the results thereof G n AC AOO to generate the command signal to the servovalve under test G n DC AOO to generate other command signals for example to control supply pressure Gabarit to enter tolerance values Voies to enter different measurements and their units pressure in bars current in mA and so on Masque to allow the access to the page which store different templates for printing test results on the Excel diagram Inputs and outputs There are 8 analog inputs AI and 2 analog outputs AO Each input output ranges from 10 to 10 volts Each input output has to be calibrated as a function of the parameter to be measured Es bo be Fa Fe ez ae ul en Type de table tracante ui y E Phase Amplitude Voies Masque Gen AC 400 Gen DC ao Gabarit Analyse The page above shows the input output configuration to provide for the following analysis functions for a flow control se
4. 0 O 20 FU g0 a0 e AESUIJLON PUR gius SEG WES eue R Jo SISAIEUE LE BUT r quy 11101107 auo Loge TED dde en yogewxosdde eau 1529 SR tects A AK G0 SISAIBUY Jesu ura Mop indngo 14 ww ory 9 ss S Se d Se Bo Se 8 Op F s o KK E XE e Se Ii ne de Sp sq Oe 9 SN at rax vaca A ici n Eri A Era i Ea Eaca aee Daci Ea I MP Se 6 aa S e Ere caa Ea cas e Ea aan Pia a Eae Ea aaa Eee E ES 6 AAI EM 2 87 E mmu 9 uuu 7 Ap vui xp unu 7 z40sJro A wu z1osin x unu T40sun2 A eri gw T J0sJnd x see vu AuesupoN srpo 0 This figure shows the linear analysis diagram with exhibiting points which are out of tolerances 15 Frequency response These facilities allow to measure the frequency response of the servovalves Two curves may be drawn phase curve as a function of frequency and amplitude curve as a function of frequency A manual test is also possible in case you need only to read the phase value at a given frequency Entr e AI Sortie AI AIO AI P pan N P A D D on P e P e Type de table tracante
5. Points hors gabarit When the tolerance values are entered it 1s possible to type fat the out of tolerance points Efface analyse With this button it 1s possible to delete the analysis However the results will not be lost You have only to press Analyse lin aire or Maximum Minimum buttons to let them re appear on the diagram Filtre A low pass filter 1s available By moving the cursor you may enter the cut off frequency It is possible to define this frequency before or after measuring and for every measured parameter particularly For example it 1s possible to filter the supply pressure measurement without affecting the flow measurement thus making pressure values easy to read on the display Two following pages show two diagrams with details of the described analysis 12 Lu PUBIS jonuos eo 30 F0 co O 0 GI QUBSUIJLION pue pys SEIA UI O SIsaus sA JOJSIS JBUE JESUN e tl ii VO i d i g 0 pauyap sasn pw woyog sull woyoq aul 10 uoneuixoidde Jeau 0 O E ke 5 i Femme bene co 2 3 A LK sl auyap 1asn quu do au do au Jo vonewixoldde Jeau pauyap mu GOL OMEN E RE RSEN NORSK A O TE C GI aa 5 POUJAIN aJenbs 15837 au Aq paulezgo suoyeukodde lesu ATI AA PET ear OA NG LS E oe PI O TUI GI bg AN ER A LESS ANA IA AR E E A A LC is E PT PE CO A RUN M RE MP ELSE pe G SISAJRUY Jeaur 13 AU eubes Ta L 80 50 FO
6. make corrections or changes on the open page File Edit View Insert Format Tools Data Window Help Route de Jallans 20200 Chateaudun Diagramme Pression Pu SV PIN 1557 400 10 12 14 16 18 20 22 24 zb 28 30 32 34 36 38 40 i mA Date 21 09 2006 Temps 14 19 The figure above shows a three curve diagram where the measured flow curve is blue the computer approximated line 1s green and the tolerance boundaries are red 20 Being satisfied with Excel presentation you may start saving the diagram or printing it out The figure below shows the diagram print out IN LHC Route de Jallans 8200 Chateaudun Diagramme Pression Pu SV P N 1557 400 Pu bar TS T T O ES ES ZA LI NENNEN Z ZE N i i E i i LLL Ll PE lolo O ee ee ee AL AA NE NI Nn NI NI NI NI NI n 10 12 14 16 18 20 22 24 25 28 30 32 34 36 38 40 is mA Date 21 08 2005 Temps 14 18 21 Additional functions E o so lt x min Contr le m x max Contr le m y min Q Limin y max Q L min Maximum Minimum Gain Q L min Contr le m D placement Q L min Biais Contr le m Hyst r sis Contr le m Mon lin arit Contr le m Points hors gabarit 19 Curseur1 x Contr le m 57 Curseur1 y Q L min 21 Curseur2 x Contr le mA 63 Curseur2 y Q L min 2 dx Contr le m 6 dy Q Limin Cacher les curseurs chelle auto Filtre 4 Anal
7. range of 250 bar we enter 250 as a maximum value for the pressure command signals If during the test the pressure exceeds this maximum value the software will stop testing We enter 250 as a minimum value for pressure command signals Certainly the pressure can not be negative but if we limit it to zero value the test will be stopped in case of the lowest negative noise signal Then we enter the measurement settings For example we envisage 50000 measurements and the measurement frequency is 20 kHz 28 Plotter settings Measurements result in the curve plotting on the display It is necessary to define the plotter parameters as well namely Maximum and minimum limits Number of measurements Frequency of measurements Y Plotter Task Measurement amp Automation Explorer SE Fichier Edition Affichage Outils Aide Configuration enresistrer 2 Annuler C R tablir gt Tester Ajouter des voies X Supprimer des voies Y Masquer l aide E Syst me fa Voisinage de donn es conf a eee Pr c dent El Al 5 Gal T ches NI DAQmx Afficher las dstais gt gt Configuration de la tension d entr e S nf Analyser Task Channel ES Param tres amp talonnage m Plotter Task i un RES Channel talonnage des La plupart des Voies virtuelles globales NI DAC Date oparai d rnasuf ag P riph riques et interfaces Channels Date d talonnage sont con us pour E a chelles ae DDIM
8. values may be entered by moving the cursor or typing digits with a keyboard This 1s the case for all similar controls of these facilities Tolerances This page is used to enter the tolerance values which are given in the servovalve specification These curves will form a part of the configuration of the envisaged test The figure below exhibits tolerances for the flow test of a 1568 600 04 servovalve D calage x Contr le m4 p E l E 5 D lt Voies Masque G n AC 400 2 5 2 75 3 3 25 b 3 5 3 75 sa Enregistrer donn es 4 25 4 5 4 75 5 5 25 59 paca qaaa quaa para aa qaaa rrr ro DE RL TE r DU Dt NON HE UN Rn NC A RUN EC CRE A E AA AS A A HL RL r PG CIAO Hu th Errar gee 101 rrr rr oe eee uu NUUK CH ALU 11 10 5 10 9 5 9 8 5 8 7 5 7 65 6 5 5 5 4 5 4 3 5 3 25 2 1 5 1 0 AIO Contr le m Quitter The left column is intended for entering x values in this instance the command signal current Both right columns are intended for entering the flow limiting values so that the actual flow curve shall be enclosed within these limiting curves The values for the lower limiting curve shall be entered into the column y1 The inversion of this order will not change the diagram view but the analysis of the test results provides for typing fat the out of tolerance points In case of the inversion of the prescribed order this func
9. x y y t Phase Amplitude Gabarit Voies Masque Analyse G n AC 400 G n DC AO1 Phase Degr s Enregistrer cfg Effacer Enregistrer donn es Fr quence Hz This figure shows a phase lag diagram as a function of frequency AIO input was used for entering command signals to the servovalve AIT input was used for spool position transducer signals X axis 1s calibrated for frequency in Hz while y axis 1s calibrated for phase lag in degrees Each measured value is marked with a black point The diagram above shows only 2 points having the same phase angle An automatic test will produce a Bode diagram with a number of points as a function of the number of measurements 16 The AC generator page will look differently for the frequency response test Fr quence Amplitude D centrage Hz Contr le m Contr le m 150 P 20 T 10 E las B 10 16 6 14 4 1 E LES a D 1 ex 10 E i Pa 8 2 0 01 J E a 4 4 6 0 001 2 8 0 0001 y O 10 T 5 6 13 n chelle og Signal D but E F Hz Terme 150 F Hz No Analyse G n AC AOD cen DC ao Gabarit Voies Masque The following controls are available Signal this function 1s disabled since the frequency response is measured with sinus wave signals only Echelle to calibrate the x axis either in linear either in logarithm values Debut to set the lowest frequenc
10. 940 printer Printing speed in draft mode 30 pages minute Printing quality 1200 x 1200 dpi Capacity 100 pages Memory 4 MB Logitech keyboard and mouse cordless 36
11. DC AOL Analyse Gabarit Masque The AC generator has the following controls Signal to enter the signal wave sinus triangular square saw Fr quence to enter the test frequency or frequency range Amplitude to enter the output signal amplitude The possible values are the function of the input calibration D centrage to adjust the null of the output signal Attention the null shift value plus the amplitude value shall not exceed the maximum value of this input Speed of command signal change over Idyfdx gt D 0 001 F Hz Idvids lt D bi F Hz Niveau D This control allows gain in time and quality when measuring parameters who s gain varies sensibly This applies particularly to the servovalve pressure gain curve and internal leakage curve Indeed the servovalve pressure gain is normally very high The ordinary way consists in changing the command signal very slowly not to falsify measurements because of too fast change over The measurement accuracy 1s observed but it takes too much time to run the test especially at the stage when the pressure does not vary due to its saturation For us this way 1s not acceptable as we run three tests at the same time differential pressure internal leakage and spool position The test would be too long since the differential pressure keeps being saturated for 90 of time During this period it is possible to change over to signals faster I
12. M IVY mesurer ou lire la 3 Activer talonnage TERT tension Les deux G Logiciels Channels E er l talonnag MEE Date d expiration mesures de tension Kd T ches VI Logger oe Supprimer l talonnage DD MM YYYY courantes sont DC et 2 T 7 anne E a Syst mes d port s Mesure de la tension AC Les tensions DC sont utiles pour mesurer des ph nom nes qui varient lentement avec le temps comme la temp rature la pression ou la contrainte Les tensions AC en revanche sont des C Cadencement de la tache FL D clenchement de la t che augmentent r duisent ou inversent Mode d acquisition constamment la 3 E polarite La plupart des O 1 chantillon sur demande lignes lectriques O 1 chantillon horloge mat rielle acheminent une 9 N chantillons O En continu Fr quence Hz Param tres d horloge Echantillons lire L chantillons lire Param tres d horloge avanc s pre i li Bore EYER Y CERN pare chantillons lire si Type d horloge Front actif Source d horloge Uus VIA En SCT M Interne bu Montant v chantillons et sp cifie la taille du buffer si vous s lectionnez En continu T che NI DAQms Having done it for every measured parameter a calibration report may be made up and memorized 29 Finally it is possible to enter and save the calibration date and the name of the person who has done this calibratio
13. User s manual for digital plotter Summary Introduction General description Inputs and outputs AC generator DC generator Tolerances Analysis Frequency response Save and templates Additional functions Zoom Calibration Hardware Page 10 11 16 18 22 23 24 32 Introduction One of our customers has suggested replacing analog plotters by electronic data processing facilities These digital plotters will be used in the production of servovalves to plot different curves of their static performances and dynamic response These facilities may be also used in development tests of servovalves and prototype perfecting In addition they provide for optimum data storage automatic calculation of the valve performances with print out of the obtained results and plotting several curves simultaneously The customer charged Dietz automation GmbH with implementing this project The customer will have an equipment which will bring up to a higher level the quality and productivity of his production This manual describes the general way of application of these facilities We recommend reading it before pressing keys and buttons General description When starting the program ValveExpert Plotter the page will open which was last in use before the computer was closed If you are going to test the same model of servovalves you may start testing without opening the required test configuration or reconfiguring anything
14. ation y mx b o x est une 3 z valeur avant chelle et ag AI3 2 i 25 o y est une valeur mise l chelle ag 214 44 AIS LL TZ Echelle lin aire 44 Al2 JZ f Pente Ordonn e l origine Par exemple supposez que vous vouliez 44 I6 z M mettre en relation les 8 y 5 valeurs avant chelle 44 Al N C Equation r sultante avecles valeurs apr s 44 400 eC TI EN LE B B PF LC 25xX 0 chelle selon l chelle ag 401 0 lin aire Logiciels Unit s f T ches VI Logger Avant chelle Apr s chelle Ou x est une valeur 2 A gt avant chelle et y est e Syst mes d port s Volts v Ps bar une valeur mise l chelle Volts y 2x 0 Pour les op rations d entr e si le p riph rique acquiert une valeur avant chelle de 2 la valeur w Aide contextuelle Cette fen tre affiche l aide contextuelle D placez le curseur sur une commande ou un indicateur pour obtenir des informations son sujet 44 Echelle NI DAQmx The AII input is attributed to the supply pressure which we index as Ps We name this scale Ps bar This name will appear on the input output page and tell that AI1 input corresponds to the supply pressure and 1s calibrated in bar Signals are measured in Volts and this is to be set If the pressure transducer performance 1s linear its slope and initial ordinate will be attributed according to the following equation Y ax b where a 1s the slope and b
15. chier d aide repartez vous aux rubriques suivantes Conventions Conventions typographiques et de formatage utilis es dans ce fichier d aide Informations importantes Support technique et services Pour taut commentaire relatif la documentation National Instruments reportez vous au site Web de National Instruments B 2004 2006 National Instruments Corporation Tous droits r serv s This Aide software explains the calibration procedure The main actions to be done are briefly described below It is necessary to open two directories namely Voisinage de donn es Echelles 25 Scales Let us begin with the Echelles directory It is necessary to define the scales of each parameter to be measured with this test rig and for the kind of test which will be run Let s assume that the AIT input is attributed to the rig supply pressure We open the Voisinage de donn es directory then we open the Echelles directory and finally we open the Echelles NI DAQmx directory We will see cells for each analog input from AIO to AI7 and for both analog outputs AO0 and AOI Y Voisinage de donn es Measurement amp Automation Explorer FEER Fichier Edition Affichage utils Aide Configuration afficher laid es Syst me i E A Voisinage de donn es y P riph riques et interfaces Vo is i na g e d e d onn es GA chelles 44 chelles NI DAQmx Qu est ce que la cat gorie Voisinag
16. e de donn es sa ao Voisinage de donn es permet d acc der des raccourcis portant des noms descriptifs afin de SEa 3 configurer les voies physiques de votre syst me Ces raccourcis peuvent comprendre des messages 44 Alz CAN des voies virtuelles et des t ches NI DAQ ainsi que des l ments FieldPoint 44 AI3 gt 44 14 Que souhaitez vous faire 44 I5 1 44 A6 44 Al 44 400 44 401 a Creer un nouveau raccourci 8 Tester ou supprimer un raccourci 8 Afficher ou modifier des propri t s Pour obtenir de plus amples informations sur l utilisation de Voisinage de donn es avec votre produit li Logiciels NI reportez vous l aide sp cifique votre produit situ e dans l l ment de menu Aide Rubriques amp El T ches VI Logger A del aide Yous pouvez aussi acc der l aide sur les produits NI au sein de l aide MAX que vous EY Syst mes d port s d marrez partir du menu Aide ou en appuyant sur lt F1 gt 26 We open the AII cell Y AI Measurement E Automation Explorer FEER Fichier dition Affichage Outils Aide Configuration yP Masquer l aide Pr c dent Ea al Sa Syst me A voisinage de donn es chelle lin aire P riph riques et interfaces 83 chelles J 44 chelles NI DAQmx z x Utilisez une chelle i lin aire pour mettre 44 AIO 7 d gom l chelle les valeurs sa 2 p Param tres de mise l chelle l aide de l qu
17. is the initial ordinate Let s assume that the pressure transducer generates a 10 V signal for 250 bar We enter 25 into the Pente cell 25 bar V If the pressure transducer has no zero drift we enter 0 into the Ordonn e l origine cell If the pressure transducer performance is not quite linear it may be corrected It happens very seldom however these facilities have a correction function 27 The procedure is not yet over We have to do other settings for each parameter to be measured So we open the Taches NI DAQm x directory and then the Analyser Task directory The following page will open Y Analyser Task Measurement amp Automation Explorer FJER Fichier Edition Affichage utils Aide Configuration E enregistrer Annuler Cw R tablir B Tester Ajouter des voies XX Supprimer des voies 3 Masquer l aide Su Syst me RSS E voisinage de donn es Pr c dent a R Jj 7 a 2 gt Gy T ches NI DAQmx Afficher les d tails D gt Configuration de la tension d entr e v n Analyser Task Channelo iss Param tres Etalonnage ni Plotter Task 3 2s z E 3 Voies virtuelles globales NI DAC Channel2 Gamme du signal d entr e M z Pupart nge P riph riques et interfaces Channels Max 250 Y sont congus pour Channel4 B x 83 chelles Min 250 tension Les deux G Logiciels Se mesures de tension 2 Channel6 a T ches YI Logger courantes sont DC et
18. n Y Plotter Task Measurement amp Automation Explorer SE Fichier Edition Affichage utils Aide Configuration BB enresistrer gt Annuler Cw R tablir gt Tester Ajouter des voies Supprimer des voies yP Masquer l aide EN Syst me 3 ded ki Pr c dent rl R A voisinage de donn es Conf UN dedo passer de 5 i T ches NI DAQm Afficher jes dstais gt gt onfiguration de la tension d entr e IT DUET nf Analyser Task Channel ES Param tres talonnage ni Plotter Task RU te Channel2 talonnage Ean La plupart des E Voies virtuelles globales NI DAC Date appareils de mesure P riph riques et interfaces Channel3 Date d talonnage sont con us pour S3 chelles Channel cm DD MMIYYYY gaine dx ne la H G Logiciels Channels Activer l talonnage ension Les deux i h Date d expiration mesures de tension a T ches YI Logger E Supprimer l talonnage DD MM YYYY a sont DC et des anne ee EH KN Syst mes d port s Mesure de la tension Les tensions DC sont utiles pour mesurer des ph nom nes qui varient lentement avec le temps comme la temp rature la pression ou la contrainte Les tensions AC en revanche sont des os waveforms qui Le Cadencement de la t che 4L D clenchement de la t che augmentent r duisent ou inversent Mode d acquisition constamment la y polarite La plupart des O 1 chantillo
19. n sur demande gt Param tres d horloge lignes lectriques 1 chantillon horloge mat rielle O ic Echantillons lire 20 GIN chantillons EE ral Y O En continu Fr quence Hz ik chantillons lire Param tres d horloge avanc s sp cifie le nombre Type d horloge Front actif Source d horloge Bee PL AAA It vous s lectionnez N Interne v Montant w v chantillons et sp cifie masal la taille du buffer si vous s lectionnez En continu acheminent une Tache NI DAGms And to set the calibration expiry date Y Assistant d talonnage de voie I Ca I Cet assistant vous guidera travers Nom de l op rateur d talonnage l talonnage de vos voies fs Assurez vous que votre syst me et Date d expiration due d a gomez E Entrez votre nom et la date d expiration pour cet talonnage Apr s l expiration de l talonnage Ce Appliquer l talonnage et renvoyer une mise en garde O Ne pas apliquer l talonnage et renvoyer une erreur z Pr c dent suivant gt Terminer 30 Now it is time to save the calibrations for the test rig for which these settings were intended In case only one plotter is available it is possible to calibrate it for several test rigs Assistant d exportation de configuration Rapport d exportation Vous pourrez diter et enregistrer le rapport une fois l op ration d exportation termin e MI DALIms 8 3 MI PLI b228
20. nigue de National Instruments 24 An Aide software 1s available E Aide Measurement amp Automation Explorer 8 Masquer Sommaire Pag A eee ae an Options Sommaire Index Rechercher Favoris AL NATIONAL Aide Measurement amp Automation E IIET y EE INSTRUMENTS 0 Pr sentation g n rale 2 Menu Fichier Aide Measurement amp Automation Explorer 2 Menu Edition Juin 2006 370694D 0114 2 Menu Affichage Utilisez Measurement amp Automation Explorer MAX pour r aliser les t ches A Menu Outils suivantes 7 Menu Aide 2 Astuces pour l utilisation di 2 e L onfiguration et rapports Cr er et modifier des voies des t ches des interfaces des chelles et des Ly talonnage instruments virtuels Informations sur l talonna e Ex cuter des diagnostics syst me s Informations importantes e Afficher la liste des p riph riques et des instruments connect s votre B Support technique et serv systeme ES C Aide MAS avec les syst mes Mettre jour vos logiciels National Instruments Configurer votre mat riel et vos logiciels National Instruments Faire une copie de sauvegarde ou dupliquer les donn es de configuration gt Produits installes Pour naviquer dans ce fichier d aide utilisez les onglets Sommaire Index et El C Informations importantes Rechercher situ s gauche de cette fen tre Qe Support technique MAs Four obtenir des informatians compl mentaires sur ce fi
21. om Full scale diagram rv 5 25 A A57 I 4 5 LH pe p am 7 15 Fa 2457 y pal Am 2 a zh gt F 15 7 a i y d 1 75 P 15 7 z y p rod POO OOO O OO O ODO OO ODO Er CE SLE 10 5 10 AS 9 05 Y 7 5 7 AS 6 5 ae ih uN oh wu dam th a fa ia on e ia a a int 1 e a 1A LA haz uN we pa A mi ia ua ia oo MN la qe The red point is in the center of the diagram This point may be moved anywhere on the diagram Pressing the zoom button causes the diagram to be zoomed in as shown below CE gnm Fi TE nvs Fi 0 45 i EE E of WES 23 Calibration Each test rig shall be calibrated The National Instruments Measurement amp Automation Explorer software is used Y Syst me Measurement amp Automation Explorer Fichier Edition Affichage Outils Aide Configuration ficher l aide EN Syst me 8 voisinage de donn es y P riph riques et interfaces N at io na l I n st rume nts GA chelles ii Measurement amp Automation Explorer E Logiciels E T ches VI Logger EY Syst mes d port s Qu est ce que Measurement amp Automation Explorer Measurement amp Automation Explorer MAX fournit l acc s vos produits National Instruments Que souhaitez vous faire G rer vos oh riques et interfaces D veloppez la cat gorie P riph riques et interfaces dans l arbre de configuration
22. rvovalve AIO for command signal in mA All for supply pressure Ps in bar AI2 for return pressure Pr in bar AT3 for control pressure Pa in bar A14 for control pressure PB in bar AIS for pressure differential PB Pa in bar A16 for flow Q in l min ATT for position transducer signal in V SEEDEDE E c RE ASGER In case of a specific test it is necessary to combine the inputs outputs in a way to represent the results of this test The operation is similar to the ordinary x y plotter The left column is intended for the x axis The right column is intended for the y axis Example You need the flow curve plot of a servovalve Therefore you take the AIO input in the left column for x axis which will be used for command signals to the servovalve in MA You take the AI6 input in the right column for y axis which will be used for the flow of the servovalve in l min Then you choose the x y plotter and define the scale of both axes as a function of the desired measurement range for the command signals and expected flow values which correspond to these signals This being done you open the G n AC AOO page The procedure seems to be long and complicated but you do it only once for every servovalve model Once all the data are entered this configuration is saved A cfg file will be created and every time when you need to run this test you open this memorized file all the scales and adjustments reappear and you can star
23. s documents Xi Plotter E 5 SY 1568 600 04 E Mi D bit Lt c Configurations CA Masques CJ R sultats ic Dynamique ic Fuites Position LVDT Pression diff rentielle SY 1570 410 01 C Sv 1570 415 01 L Sv 1570 421 El 5 5 1570 440 El Ej 5 1570 450 FE SVP 1567 400 5 SVP 1923 000 El Poste de travail a Favoris r seau El Corbeille L Etalonnage Si Nouveau clips H EE Hl For example the Plotter directory encloses different configurations to test a SV 1568 600 04 servovalve model For measuring its flow curve the test configuration is saved as well as the configuration of the print out template which produces the test results as Excel diagram that is used to save them and print out When you need to measure the flow curve of this servovalve you open D bit 1568 600 04 cfg All saved settings and configurations will take their places and you may start testing Having finished the test you ask to save the results This time you name the file and point out the directory where the file will be put in In case of a multi curve diagram as for some pressure control servovalves it is necessary to attribute Excel sheet pages to each curve to be saved These pages may be named as Data 1 Data 2 Data 3 and so on When pressing the button Enregistrer donn es the data are transferred to an Excel file which opens at once Now you may save them or print out 19 With Excel provisions it is possible to
24. sur la gauche Si vous avez besoin d aide pour installer un p riph rique reportez vous aux instructions de mise en route comprises avec le mat riel National Instruments G rer les logiciels National Instruments install s S lectionnez la cat gorie Logiciels dans l arbre de configuration sur la gauche l G rer des voies virtuelles ou des t ches po S lectionnez la cat gorie Voisinage de donn es dans l arbre de configuration sur la gauche Cr er des chelles pour vos instruments virtuels S lectionnez la cat gorie Echelles dans l arbre de configuration sur la gauche BB Configurer les drivers d instruments IVI S lectionnez la cat gorie IVI Drivers dans l arbre de configuration sur la gauche e Importer exporter le fichier de configuration de votre p riph rique S lectionnez l l ment de menu Fichier Importer ou Fichier Exporter pour importer ou exporter des fichiers de configuration Certains p riph riques ne sont pas support s Reportez vous la documentation sp cifique votre produit g Remarque Certaines cat gories sont sp cifiques des p riph riques particuliers Par exemple la cat gorie IVI Drivers ne s affiche que si IVI est install Pour obtenir des informations compl mentaires s lectionnez les rubriques d aide disponibles partir du menu Aide Si vous avez besoin d une aide compl mentaire ou si vous souhaitez en savoir plus sur un p riph rique consultez le site Web de support tech
25. t is quite different with these facilities They allow to decrease the time of changing the command signals as the function of the data curve derivative The adjustment will require some skill and it has to be done for every servovalve model to be tested The following controls are available Niveau D to enter the increment decrement value which shall start changing the speed of the command signal change over For example if the servovalve pressure gain 1s 50 000 psi mA it may be defined that if the change over value exceeds 1000 the speed becomes lower dy dx D F Hz to enter the value of the command signal passage The figure above shows the value of 0 01 Hz which means that it will take the command signal 100 seconds to go back and forth or 50 seconds in one direction dy dx gt D F H2 to enter the lower speed value when the D value is exceeded The figure above shows a 10 time lower speed than the preceding one Gen DC AO direct current generator The second analog output is provided with a DC generator It generates a voltage output ranging from 10 to 10 V This voltage may be used for additional functions Valeur DC Ps bar na in ce A F c c l Gabarit Voies Masque For example this generator may be used to generate command signals for pressure supply in case the test rig has the pressure closed loop feedback The output
26. t testing at once A big advantage of these facilities consists in simultaneous saving of all the 8 inputs If for example the test shows that the flow of a servovalve 1s lower than you expects you may get displayed the value of the supply pressure as a flow function to see whether this pressure has been stable when the test was run Another example proves the importance of the simultaneous saving of several inputs You are saving the differential pressure curve of a servovalve Atthe same time the internal leakage curve of this servovalve 1s saved the configuration of this test being identical to the test described above 1 e the control ports are closed In addition the spool position curve is saved for servovalves equipped with spool position transducer Furthermore Va and Vb tensions may be also saved In total 5 diagrams may be possible with one test G n AC AO6 alternating current generator The data acquisition system has 2 analog outputs An AC generator is connected to the AOO output This generator has 2 functions It changes the command signal to be applied to the servovalve for providing its flow or pressure curve It generates the command signal to be applied to the servovalve when the frequency response is testing Fr quence Amplitude Decentrage Hz NI mw 10 0 0001 S HEP y s m o Signal Idyidx gt D 0 001 F He dy dx lt D F Hz Niveau D Gen AC AOL Gen
27. tion will be disabled 10 Analysis 9 75 1 x min VJ 9 73 x max V v min M 2 73 y max Mj Maximum Minimum It Gain V V lo D calage V lo Biais VJ lo Hysteresis V lo Mon lin arit v Analyse lin aire Points hors gabarit Fo i Curseuri x V H0 3 Curseuri v V 0 5 Curseurz x V 0 5 Curseur2 V I dx M n dy OV Trouve curseurs Echelle auto Filtre Analyse Canaux Clich Excel Montrer curseurs Montrer gabarit After having run the test you start analyzing its results Maximum Minimum When you press this button a frame appears on the diagram showing the maximum and minimum values as test results on both axes 11 Analyse lin aire When you press this button the computer displays some values of the plotted curve namely Gain and null shift the operator having placed both cursors of the y axis in the way to require a linear analysis between these two values the computer will plot a linear curve as the best approximation of the measured curves or the average line between two curves This line is described by the following equation y ax b where a 1s the gain value and b 1s the null shift Null bias Hysteresis which is the maximum difference between the measured curves Non linearity which is the maximum difference between the direct computer approximated line and the measured curves
28. y for starting measuring the frequency response This states by definition the amplitude ratio to be null at this frequency Terme to set the highest frequency for stopping measuring the frequency response No to set the number of measurements to be done for drawing the Bode diagram Auto to begin measuring the frequency response 17 Save and templates Test configurations may be saved as well as the results of the tests which are already run YY Enregistrer ch Ouvrir F cfg Effacer Stylo Enregistrer donn es Quvrit donn es Quitter 1 Test configuration saving To make a test configuration you have to Choose the measurements to do and attribute inputs and outputs Make calibrations Set tolerances Set the speed of the command signal change over Set the print out masque It takes a certain time to make a test configuration and this time is rather long As we test only a ten of servovalve models we may create files attributed to each of them It 1s a suggestion but the operator may use another way of saving different configurations For example it 1s possible to save the configuration for testing one servovalve model and to manage its use with Windows Explorer 18 Configurations Fichier Edition Affichage Favoris Outils C9 Pr c dente v gt d Rechercher Dossiers gt X ie Bab Dossiers Mom Taille Type E Bureau Es D bit 1568 600 04 cFg lko Fichier CFG EI Me
29. yse lin aire Cacher le gabarit Analyse G n AC AOD G n DC AO1 Gabarit Masque Enregistrer cfg Effacer Enregistrer donn es Ouvrir donn es SCION OOOO ACACIA EOI GIO ICICI CN EN ICICI EN ICICI AICA AO ACCION FOIE BOCINA TIO PORN ROI ON AO OOO O ODO ap ab ak as ES aa Ala ale al eal el 0230857422755 aa e 5789298293 E eg REP chy dat En SI 330939 20 AIO Contr le m To make the test running easy some additional functions are available namely Trouver les curseurs It happens that the cursors are out of the window frame Pressing this button places the cursors in the center of the window Cacher les curseurs Pressing this button causes the cursors to disappear 1f they trouble Cacher le gabarit Pressing this button causes the tolerance boundaries to disappear They may be displayed at any moment Echelle auto In case when the flow of a servovalve was measured with a reduced range of command signals it is not necessary to re adjust settings for the flow and command signals Pressing this button causes the flow curve to be drawn at a full range of signals Zoom The red point in the center of the diagram may be moved anywhere Pressing this button causes the curve portion marked by this red point to be zoomed in thus allowing to examine it closer Each cursor is positioned by entering the desired digits as well as the differences between them which are defined as dx and dy 22 Zo
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