PRESSURE SENSOR TECHNICAL GUIDE INTRODUCTION FEATURES OF ELECTRIC PRESSURE SENSOR. Photoelectric. Sensor. Proximity Sensor. Inductive. Sensor.

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1 Proximiy INTRDUCTIN Pressur sensor The sensor convers of gases or liquid ino elecrical magniude wih he sensing elemen, and generaes he analog oupu proporional o applied level or he swiching oupu oggled a he se value. All SUNX sensors are incorporaed wih he semiconducor ransducers as he sensing elemens ha offer long life and high reliabiliy. Srucure of elecric sensor Wih non-corrosive gases The diffused semiconducor ransducer measures, and generaes an elecric signal ha is processed by he amplifier and he oupu circui. Non-corrosive gas Diffused semiconducor ransducer Amplifier upu circui -volage conversion DC power source upu FEATURES F ELECTRIC The sensors can be classified ino wo ypes : Elecric ype and Mechanical ype. Mechanical ype sensors have been used usually, which are inexpensive, bu shor in life and unreliable. These days, elecric sensors become familiar because of longer life and higher reliabiliy. Elecric ype Mechanical ype (Bourbon-ube, Bellows, ec.) Disadvanage Advanage Principle Direc conversion from o elecriciy wih non-conac swiching oupu. High precision High reliabiliy and long life because of no mechanical par Quick response Expensive han mechanical ypes Indirec conversion wih a mechanical swich ha generaes N/FF conac oupu. Inexpensive No power needed Shor lifeime Delayed response 78

2 TYPES F SENSRS Classificaion caegories 1 Classificaion by measure is measured by comparison wih reference. sensors are classified ino wo ypes in measuring mannor. sensor Classificaion by por sensors provide several pors ha mee paricular connecions wih pipes or ubes. sensor Gauge Differenial Rc (PT) 1/8 M5 1 3 UNF NPT 1/8 G (PF) 1/8 R (PT) 1/4 male hread NPT 1/4 male hread G (PF) 1/8 male hread "3.5 pipe "4.8 pipe Type Gauge Differenial Type Rc (PT) 1/8 M5 1-3 UNF NPT 1/8 Classificaion 1 Classificaion by measure The gauge ype refers o he amospheric. The differenial ype compares wo s inroduced from differen pors. Classificaion by por Tapered Exremely air-igh for high Accusomed in Japan Fairly air-igh for low Sraigh Fairly air-igh for low Accusomed in Norh America Tapered male hread Exremely air-igh for high Accusomed in Norh America TECHNICAL GUIDE proximiy G (PF) 1/8 R (PT) 1/4 male hread Sraigh Fairly air-igh for low, bu easily connecable Accusomed in Europe Tapered male hread Exremely air-igh for high Accusomed in Japan NPT 1/4 male hread Tapered male hread Exremely air-igh for high Accusomed in Norh America G (PF) 1/8 male hread Sraigh male hread Fairly air-igh for low, bu easily connecable Accusomed in Europe "3.5 pipe Easy connecion wih a ube Fairly air-igh for low "4.8 pipe Easy connecion wih a ube Fairly air-igh for low 79

3 TYPES F SENSRS Classificaion able : Accordance Proximiy Iem Model No. Type LED digial display LED bar display Compac size DP- DP-4 DP-6 DP-8 DP- N DP- E DP-M PE- PE- N PE- E PNX- PNX- -T 1Classificaion by measure Gauge Differenial Rc (PT) 1/8 M5 1-3 UNF Classificaion by por NPT 1/8 G (PF) 1/8 R (PT) 1/4 male hread NPT 1/4 male hread G (PF) 1/8 male hread "3.5 pipe "4.8 pipe 71

4 GLSSARY Term Term TECHNICAL GUIDE Transducer A device which convers one quaniy ino anoher quaniy, specifically one of quaniies is elecrical. The ransducer convers ino elecriciy. ransducer (Displacemen) Elecric signal Hyseresis Difference beween N poin and FF poin of levels. N FF Hyseresis proximiy Non-corrosive gas Gases in he air (Nirogen, Carbon dioxide, ec.) and iner gases (Argon, Neon, ec). FF poin N poin Absolue Gauge Differenial Absolue : deermined wih respec o he complee vacuum as zero Gauge : Absolue Gauge Differenial deermined wih respec o he amospheric as zero higher han he amospheric level is idenified as Posiive, bu lower han i as Negaive. Differenial : Difference beween wo s Negaive Posiive Temperaure characerisic The sensing level varies in ambien emperaure drifs. The below graph shows how much he sensing level variaion raio ha refers o he sensing level a he crierion emperaure of 5 C (or C) as zero changes along ambien emperaure drifs wihin he specified emperaure range by a percenage of he full scale. Sensing level variaion raio 1%F.S. 1%F.S. 5 C Ambien emperaure 5 C Absolue vacuum Amospheric Raed range Seing range range ha he specified capabiliy can be mainained. perable range ha he hreshold level can be se for he comparison oupu. The graph reveals he ypical characerisic of he model so ha i may vary in producs. resisance The limi over raed range ha he sensor can resore is performance afer pressurized Sampling cycle Frequency ha he sensor reads Repeaabiliy Variaions of N levels while he sensor is pressurized repeaedly o generae he oupu coninually under he consan supply volage and emperaure. I is represened by a percenage of he full scale. Maximum Minimum operaional poin operaional poin 1 (% F.S.) Raed range The analog oupu volage changes in proporion o. I ideally shifs lineally over he scale, bu acually waves. The error of waving is represened as he lineariy by a percenage of he full scale. 5 Response frequency Response ime The frequency ha he oupu can be generaed coninually by repea pressurizaion under he cerain condiion. The ime lag from a change o he oupu generaed. Sensing condiion upu operaion Sensing Non-sensing N FF : Response ime Lineariy upu volage (V) 4 3 Maximum error Full-scale (kpa) 711

5 Proximiy GLSSARY Term Degree of proecion agains waer and solid foreign maerial, and for human body. Proecive srucure is based on IEC (Inernaional Elecroechnical Commission). IEC sandard (IEC) IP Second figure...proecion agains waer peneraion Firs figure......proecion for human body and agains solid foreign agains maerials Proecion degree by he firs figure Proecion degree by he second figure Firs figure No proecion Second figure No proecion 1 Proecion agains a conac wih live pars inside by a hand ("5mm) "5 1 No harmful effec by verical waer ligh splash 3 Proecion agains a conac wih live pars inside by a finger ("1mm) Proecion agains a conac wih live pars inside by a hing greaer han.5mm in hickness or diameer "1.5 3 No harmful effec by waer ligh splash from he range 15 wider han he verical No harmful effec by waer ligh splash from he range 6 wider han he verical Proecion 4 Proecion agains a conac wih live pars inside by a hing greaer han 1.mm in hickness or diameer 1. 4 No harmful effec by waer heavy splash from any way around 5 Proecion agains dus submersion as far as no affecion o he operaion 5 No harmful effec by direc waer je from any way around 6 Complee proecion agains dus submersion 6 No waer peneraion by direc waer je from any way around (*1) : To decide he proecion degree in each model, which described in specificaions, he es procedure prescribed by he IEC sandard is execued. 7 No waer peneraion by immersion in waer under he specific condiions 8 Usable during immersion in waer under he specific Cauion The srucure specified by IP raio includes he aached cable, however keep ou waer a he end of he cable as i may soak hrough he cable ino he sensor. Keep ou waer 71

6 FUNCTINS Funcion Funcion TECHNICAL GUIDE This funcion compensaes he se hreshold level for a change of he reference. peraion 1 Normal sensing Mo Po Time a Reference change N FF Mo : Se value Po : Reference Mo Po a Auomaic sensiiviy seing funcion The hreshold level is auomaically se by he N.G. level and he.k. level ough. Applicaion Checking for sucion N FF N.G. Hyseresis.K. proximiy Mo Po Po Time FF Wihou his funcion, he hreshold level se wih he reference will be ineffecive if he reference changes. 3 Auo-reference funcion in use When auo-reference inpu is made N soon Mo afer he reference changes, he hresh- Mo N Po a FF Po old level Mo is correced Time o he new level Mo, Auo-reference inpu which mainains he proper judgmen. uni selecion funcion Several unis available on he sensor Posiive : Selecable among Pa, kgf/cm, psi, and bar Negaive : Selecable among Pa, kgf/cm, mmhg, psi, bar, and InchHg (*1) : Wih he DP-M series, eiher kpa, or mmh is selecable. Auo-reference funcion Applicaion Air leak es Mo Po α a Po a (kpa) 9 SET 6 Time for pressurizing Judgmen ime Good produc Fauly produc Auo-reference SET 3 To Time T1 1 Above graph shows a curve of he air leak es. For he cerain ime, if he level has decreased by 3kPa or more from he peak, he produc is N.G., bu if less han 3kPa, he produc is.k. Before pressurizing, key in he se value as follow. SET 3 3 Apply and acivae he auo-reference inpu a he peak To. As he reference is 9kPa, he hreshold level is auomaically renewed a 6kPa. SET 3 9 6kPa 713

7 FUNCTINS Funcion able Type LED digial display LED bar display Compac size Proximiy Funcion Auo-reference funcion Model No. DP- DP-4 DP-6 DP-8 DP- N DP- E DP-M PE- PE- N PE- E PNX- PNX- -T Auomaic sensiiviy seing funcion Hyseresis adjusable funcion uni selecion funcion i : Whole models are available f : Some models are available (By using wih opional he conrollers) m : Incorporaed wih sub scale m m m PRESSURE UNIT EQUIVALENT TABLE psi kpa mmhg kgf/cm am bar mmh InchHg (pound/inch ) 1kPa mmHg kgf/cm am bar psi (pound/inch ) mmH InchHg