Ilogo yeGREISINGERImodyuli ye-EASYBus-Sensor yobushushu bokufuma
ngokhetho: bonisa ukufuma okukhethiweyo
ukusuka kwinguqulelo V3.2

Incwadi yokuSebenza
EBHT – … / UNI

GREISINGER EBHT 1K UNI Easy Bus Sensor Module-Figure 1

Ukusetyenziswa okucetywayo

Isixhobo silinganisa ukufuma kunye nobushushu bomoya okanye iigesi ezingadlekiyo / ezingenayo i-ionizing.
Ukusuka kula maxabiso abanye banokufunyanwa kwaye baboniswe endaweni ye-rel. ukufuma.

Indawo yesicelo

  • Ukujongwa kwemozulu yegumbi
  • Ukubekwa esweni kwamagumbi okugcina njl..

Imiyalelo yokhuseleko (jonga isahluko sesi-3) kufuneka ilandelwe.
Isixhobo akufuneki sisetyenziselwe iinjongo kwaye phantsi kweemeko zokuba isixhobo besingayilwanga.
Isixhobo masijongwe ngononophelo kwaye kufuneka sisetyenziswe ngokweenkcukacha (musa ukujula, ukunkqonkqoza, njl. njl.). Kufuneka ikhuselwe ekungcoleni.
Musa ukuveza inzwa kwiigesi ezinobundlobongela (njenge-ammonia) ixesha elide.
Gwema ukudibanisa, njengoko emva kokumisa kungasala iintsalela, ezinokuchaphazela ukuchaneka kakubi.
Kwiindawo ezinothuli kufuneka kufakwe ukhuseleko olongezelelweyo (izikhuselo ezikhethekileyo).

Ingcebiso ngokubanzi

Funda olu xwebhu ngononophelo kwaye uzenze uqhelene nokusebenza kwesixhobo phambi kokuba usisebenzise. Gcina olu xwebhu ngendlela ekulungeleyo-ukuze ukwazi ukujonga kwimeko yokuthandabuza.

Imiyalelo yokhuseleko

Esi sixhobo senziwe savavanywa ngokuhambelana nemigaqo yokhuseleko lwezixhobo zombane.
Nangona kunjalo, ukusebenza kwayo okungenazinkathazo kunye nokuthembeka kwayo akunakuqinisekiswa ngaphandle kokuba imilinganiselo yokhuseleko oluqhelekileyo kunye neengcebiso ezikhethekileyo zokhuseleko ezinikwe kule ncwadana ziya kuthotyelwa xa uyisebenzisa.

  1. Ukusebenza okungenazingxaki kunye nokuthembeka kwesixhobo kunokuqinisekiswa kuphela ukuba asithotyelwanga kuzo naziphi na ezinye iimeko zemozulu kunezo zichazwe phantsi kwe-“Specification”.
    Ukuthutha isixhobo ukusuka kwingqele ukuya kwindawo efudumeleyo yokuxinana kunokubangela ukusilela komsebenzi. Kwimeko enjalo qinisekisa ukuba ubushushu besixhobo bulungelelanise ubushushu be-ambient phambi kokuba uzame ukuqalisa okutsha.
  2. Imiyalelo ngokubanzi kunye nemigaqo yokhuseleko kwizityalo zombane, ezikhanyayo nezinzima, kubandakanywa nemigaqo yokhuseleko lwasekhaya (umz. VDE), kufuneka ithotyelwe.
  3. Ukuba isixhobo siza kuqhagamshelwa kwezinye izixhobo (umzekelo, kusetyenziswa iPC) isekethe kufuneka iyilwe ngononophelo olukhulu.
    Uqhagamshelo lwangaphakathi kwizixhobo zomntu wesithathu (umz. uqhagamshelo lwe-GND nomhlaba) lunokubangela umthamo ongavumelekangatagukonakalisa okanye ukonakalisa isixhobo okanye esinye isixhobo esiqhagamshelwe.
  4. Nanini na xa kunokuthi kubekho umngcipheko nokuba yeyiphi na into ebandakanyekayo ekusiqhubeni, isixhobo kufuneka sicinywe ngoko nangoko kwaye siphawulwe ngokufanelekileyo ukuthintela ukuphinda siqalise.
    Ukhuseleko lomsebenzisi lunokuba yingozi ukuba:
    – kukho umonakalo obonakalayo kwisixhobo
    – isixhobo asisebenzi njengoko kuchaziwe
    – isixhobo sigcinwe phantsi kweemeko ezingafanelekanga ixesha elide
    Kwimeko yamathandabuzo, nceda ubuyisele isixhobo kumenzi ukuze silungiswe okanye sigcinwe.
  5. Isilumkiso: Musa ukusebenzisa le mveliso njengokhuseleko okanye isixhobo sokumisa likaxakeka okanye kuso nasiphi na esinye isicelo apho ukusilela kwemveliso kunokubangela ukwenzakala okanye ukonakala kwezinto.
    Ukungaphumeleli ukuthobela le miyalelo kunokubangela ukufa okanye ukwenzakala kakhulu kunye nomonakalo wezinto eziphathekayo.

Amanqaku okulahla

WEE-Disposal-icon.png Esi sixhobo akufuneki silahlwe “njengenkunkuma eshiyekileyo”.
Ukulahla esi sixhobo, nceda usithumele ngqo kuthi (ngokufanelekileyo stamped).
Siza kuyilahla ngokufanelekileyo nangokusingqongileyo.

Isabelo seplagi yohlobo lwengqiniba

Uqhagamshelwano lweengcingo ezi-2 lwe-EASYBus, akukho polarity, kwiitheminali 1 kunye no-2

Imiyalelo yokuhlohla ngokubanzi:

Ukufakela intambo yoqhagamshelo (2-ingcingo) isikrufu seplagi yohlobo lwe-elbow kufuneka sikhululwe kwaye ufakelo lokudibanisa kufuneka lususwe nge-screw driver kwindawo ebonisiweyo (utolo).
Khupha intambo yoqhagamshelo nge-PG gland kwaye uqhagamshele kwindawo edibeneyo yokudibanisa njengoko kuchaziwe kumzobo wocingo. Faka endaweni yezikhonkwane kwizindlu zetransducer kwaye ujike ikepusi yesigqubuthelo nge-PG gland kwicala olifunayo ide igqithe (4 iindawo zokuqalisa ezahlukeneyo ngezithuba ezingama-90°). Phinda uqinise isikrufu kwiplagi ye-engile.

Iintlobo zoyilo, ubukhulu

GREISINGER EBHT 1K UNI Easy Bus Sensor Module-Iintlobo zoyilo, ubungakanani

Bonisa Imisebenzi

(ifumaneka kuphela kwizixhobo ezinokhetho ...-VO)

8.1 Umboniso wokulinganisa
Ngexesha lokusebenza okuqhelekileyo ixabiso elikhethiweyo lokufuma liyaboniswa litshintshana neqondo lobushushu kwi [°C] okanye [°F]. GREISINGER EBHT 1K UNI Easy Bus Sensor Imodyuli-Umboniso wokulinganisa

Ukuba ukufuma okunxulumeneyo kwi [%] kufuneka kuboniswe, nangona omnye umboniso ukhethiwe (umzekelo iqondo lombethe, umlinganiselo wokuxutywa...):
cofa u-▼ kunye no-▲ utshintsho olubonisa ngaxeshanye phakathi kwe-"rH" kunye nomlinganiselo

8.2 Min/IMemori yexabiso eliphezulu

jonga amaxabiso amancinci (Lo): cofa ▼ ngokukhawuleza kube kanye bonisa utshintsho phakathi kwe "Lo" kunye neMin yamaxabiso
Bukela amaxabiso aphezulu (Hi): cofa ▲ ngokukhawuleza kube kanye bonisa utshintsho phakathi kuka "Hi" kunye namaxabiso aphezulu
buyisela amaxabiso angoku: cofa ▼ okanye ▲ kwakhona amaxabiso angoku abonisiwe
cacisa amaxabiso aphantsi: cofa ▼ imizuzwana emi-2 Amaxabiso amancinci acinyiwe. Umboniso ubonisa kamsinyane "CLr".
cima amaxabiso aphezulu: cofa ▲ imizuzwana emi-2 Amaxabiso aphezulu acinyiwe. Umboniso ubonisa kamsinyane "CLr".

Emva kwemizuzwana eli-10 amaxabiso alinganisiweyo ngoku aya kuboniswa kwakhona.

8.3 Ukusetyenziswa kweeLebhile zeYunithi
Njengoko isidluliseli sisixhobo senjongo ezininzi, iiyunithi ezininzi ezahlukeneyo zokubonisa ziyenzeka, umz. g/kg, g/m³.
Ngoko ke iileyibhile zeyunithi (ngaphakathi konikezelo) zinokutyhalwa phakathi kwesigqubuthelo secala kunye nefoyile yangaphambili emva kweyunithi-festile ecacileyo.
Ukutshintsha ileyibhile, khulula isiciko, khupha ileyibhile endala (ukuba ikhona) uze utyhale kwentsha.
Iyunithi ixhomekeke kwimimiselo yoqwalaselo "Iyunithi"!
Nceda ujonge kwitheyibhile kwisahluko "10 Uqwalaselo lwesixhobo"

GREISINGER EBHT 1K UNI Easy Bus Sensor Module - Ukusetyenziswa kweYunithi-Labels

8.4 Min/Ubuninzi beAlarm Display
Nanini na xa ixabiso elilinganisiweyo ligqithisa okanye lingaphantsi kwee-alam-amaxabiso asekiweyo, isilumkiso se-alam kunye nexabiso lokulinganisa ziyakuboniswa zitshintshana.
AL.Lo Umda we-alam osezantsi ufikeleleke okanye u-undershot
AL.Molo Umda we-alam ophezulu ufikelelekile okanye ugqithisiwe

Imposiso kunye nemiyalezo yenkqubo

Bonisa Inkcazo Ingxaki enokwenzeka Iyeza
Impazamo.1 Uluhlu lokulinganisa lugqithile Umqondiso ongalunganga Iqondo lobushushu elingaphezulu kwe-120°C alivumelekanga.
Impazamo.2 Ixabiso lokulinganisa ngaphantsi koluhlu lokulinganisa Umqondiso ongalunganga Iqondo lobushushu elingaphantsi -40 °C alivumelekanga.
Impazamo.3 Uluhlu lokubonisa lugqithiwe Ixabiso >9999 Jonga useto
Impazamo.7 Isiphene senkqubo Impazamo kwisixhobo Nqamula kunikezelo kwaye uqhagamshele kwakhona. Ukuba impazamo ihleli: buyela kumenzi
Impazamo.9 Impazamo yoluvo Inzwa okanye intambo inesiphene Jonga abenzi boluvo, intambo kunye noqhagamshelo, umonakalo obonakalayo?
Er.11 Ukubala akunakwenzeka Ubalo oluguquguqukayo alukho okanye alusebenzi Jonga ubushushu
8.8.8.8 Uvavanyo lwecandelo I-transducer yenza uvavanyo lokubonisa imizuzwana ye-2 emva kokunyusa amandla. Emva koko iya kutshintsha kumboniso wokulinganisa.

Uqwalaselo lwesixhobo

10.1 Ulungelelwaniso ngokusebenzisa ujongano
Ubumbeko lwesixhobo lwenziwa nge-PC-software EASYBus-Configurator okanye EBxKonfig.
Ezi parameters zilandelayo zingatshintshwa:
-Ukulungelelanisa ukufuma kunye nomboniso wobushushu (ukulinganisa kunye nokulungiswa kwesikali)
-Ukusetwa kwealam yomsebenzi wokufuma kunye nobushushu
Ukulungelelaniswa ngendlela yokulinganisa kunye nesikali kujongwe ukuba kusetyenziswe ukuhlawula iimpazamo zemilinganiselo.
Kucetyiswa ukuba ugcine ulungiso lwesikali lungasebenzi. Ixabiso lokubonisa linikezelwa ngefomula elandelayo:
ixabiso = ixabiso elilinganisiweyo - offset
Ngolungiso lwesikali (nje ukwenzela iilabhoratri zokulinganisa, njl njl) ifomyula iyatshintsha:
ixabiso = (ixabiso elilinganisiweyo - offset) * ( 1 + uhlengahlengiso lwesikali/100)

10.2 Ulungelelwaniso kwisixhobo (ifumaneka kuphela kwisixhobo esinokhetho …-VO)

Phawula: Ukuba iimodyuli ze-EASYBus sensor zisebenza ngesoftware yokufumana idatha, kunokubakho iingxaki ukuba uqwalaselo lutshintshile ngexesha lokufumana okusebenzayo. Ke ngoko kuyacetyiswa ukuba ungawatshintshi amaxabiso olungelelwaniso ngexesha loshicilelo oluqhutywayo kwaye ngaphezu koko, ukukhuselwa ekuphenjelweni ngabantu abangagunyaziswanga. (nceda ujonge umfanekiso osekunene)

GREISINGER EBHT 1K UNI Easy Bus Sensor Module-Uqwalaselo kwisixhobo

Landela le miyalelo ukuqwalasela imisebenzi yesixhobo:

  • Cinezela SET de ibe yiparameter yokuqala GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli-Uphawu 5 iyavela kumboniso
  • Ukuba iparameter kufuneka itshintshwe, cofa ▼ okanye ▲,
    Isixhobo sitshintshelwe kuseto – hlela nge ▼ okanye ▲
  • Qinisekisa ixabiso nge SET
  • Tsibela kwiparamitha elandelayo nge SET.
Ipharamitha ixabiso ulwazi
SET kwaye
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 1 Iyunithi kunye noluhlu lokufuma lokubonisa isethingi yefektri: rel. H
reL.H 0.0 100.0 % ukufuma komoya okuhambelanayo
F.AbS 0.0 200.0 g/m- ukufuma ngokupheleleyo
FEU.t -27.0 … 60.0°C ubushushu bebhalbhu emanzi
td -40.0 60.0 °C indawo yobushushu bombethe
Enth -25.0 999.9 kJ/kg I-Enthalpy
FG 0.0 … 640.0 q/kq Umxube wokuxutywa (ukufuma kwe-atmospheric)
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 2 Iyunithi yobushushu ibonisa useto lwasefektri: °C
°C Amaqondo obushushu kwi °Celsius
°F Amaqondo obushushu “kwiFahrenheit
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 3 Ukulungiswa komgangatho womlinganiselo wokufuma *)
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
-5.0 ... +5.0 Khetha ukusuka -5.0 ukuya +5.0 % rel. ukufuma
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 4 Ukulungiswa komlinganiselo we Umlinganiselo wokufuma *)
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
-15.00 ... +15.00 Ukukhetha ukusuka -15.00 ukuya +15.00% ukulungiswa kwesikali
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 5 Ulungiso lokulinganisa lobushushu *)
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
-2.0 ... +2.0 Kukhethwa ukusuka -2.0 ukuya +2.0 °C
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 6 Ukulungiswa komlinganiselo we umlinganiselo wobushushu *)
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
-5.00 ... +5.00 Ukukhetha ukusuka -5.00 ukuya +5.00% ukulungiswa kwesikali
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 7 Igalelo lobude (akukho kuzo zonke iiyunithi ezikhoyo) useto lwasefektri: 340
-500… 9000 -500 9000 m ekhethiweyo
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 8 Min. indawo ye-alam yokulinganisa ukufuma
-0.1 ... AL.Hi Inokukhetheka ukusuka: -0.1 %RH ukuya kwi-AL.Hi
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 9 Max. indawo ye-alam yokulinganisa ukufuma
AL.Lo … 100.1 Inokukhetheka kwi: AL.Lo ukuya kwi-100.1 %RH
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 10 Ukulibaziseka kwealam kumlinganiselo wokufuma
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
1 … 9999 Ikhethwa ukusuka ku-1 ukuya ku-9999 sec.
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 11 Min. I-alarm-point yokulinganisa ubushushu
Min.MB … AL.Hi Inokukhethwa kwi: min. uluhlu lokulinganisa ukuya ku-AL.Hi
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 12 Max. I-alarm-point yokulinganisa ubushushu
AL.Lo ... Max.MB Ikhethwa ukusuka: AL.Lo ukuya kubuninzi. uluhlu lokulinganisa
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli -ISETHI 13 Ukulibaziseka kwealam kumlinganiselo wobushushu
I-OFF yenziwe yangasebenzi (ulungiselelo lwasefektri)
1 … 9999 Ikhethwa ukusuka ku-1 ukuya ku-9999 sec.

Ukucofa i-SET kwakhona kugcina useto, izixhobo ziphinda ziqale (uvavanyo lwecandelo)
Nceda uqaphele: Ukuba akukho qhosha licinezelwe ngaphakathi kwimodi yemenyu ngaphakathi kwemizuzu emi-2, ulungelelwaniso luya kurhoxiswa, izicwangciso ezifakiweyo zilahlekile!
*) ukuba amaxabiso aphezulu ayafuneka, nceda ujonge isivamvo, ukuba kuyimfuneko buyela kumenzi ukuze ahlolwe.
Ukubala: ixabiso elilungisiweyo = (ixabiso elilinganisiweyo - Offset) * (1+Scale/100)

Amanqaku kwiinkonzo zolungelelaniso

Izatifikethi zokulinganisa - izatifikethi ze-DKD - ezinye izatifikethi:
Ukuba isixhobo kufuneka siqinisekiswe ngokuchaneka kwaso, sesona sisombululo silungileyo ukusibuyisela kunye nabenzi boluvo ababhekisa kumenzi. (nceda uchaze amaxabiso ovavanyo afunekayo, umz. 70 %RH)
Ngumvelisi kuphela okwaziyo ukwenza uhlengahlengiso olusebenzayo ukuba kuyimfuneko ukufumana iziphumo ezichaneke kakhulu!
Izithuthi zokufuma zixhomekeke ekwaluphaleni. Ukufumana umlinganiselo ochanekileyo sicebisa uhlengahlengiso rhoqo kumvelisi (umz. rhoqo ngonyaka we-2). Ukucocwa kunye nokujongwa kweenzwa yinxalenye yenkonzo.

Inkcazo

Bonisa uluhlu lokufuma Ukufuma komoya okunxulumeneyo: 0.0. 100.0 %RH
Ubushushu bebhalbhu emanzi: -27.0 … 60.0 °C (okanye -16,6 … 140,0 °F)
Iqondo lobushushu lendawo yombethe: -40.0 … 60.0 °C (okanye -40,0 ... 140,0 °F)
Enthalpy: -25.0…. 999.9 kJ/kg
Umxube womlinganiselo (ukufuma kweatmospheri): 0.0…. 640.0 g/kg ukufuma ngokupheleleyo: 0.0…. 200.0 g/m3
Uluhlu olucetyiswayo lomlinganiselo wokufuma Umgangatho: 20.0 … 80.0 %RH
GREISINGER EBHT 1K UNI Easy Bus Sensor Module - isivamvo sokufumaUkhetho "ukufuma okuphezulu": 5.0…. 95.0 %RH
Meas. uluhlu lobushushu -40.0 … 120.0 °C okanye -40.0…. 248.0 °F
Umboniso ochanekileyo (kwiqondo lobushushu eliyi-25°C)
Rel. Ukufuma komoya: ±2.5 %RH (ngaphakathi kwengxelouluhlu lokulinganisa olulungisiweyo)
Iqondo lobushushu: ±0.4% yomlinganiselo. ixabiso. ±0.2°C
Media Iirhasi ezingadlekiyo
Izivamvo i-capacitive polymer humidity sensor kunye ne-Pt1000
Imbuyekezo yobushushu oluzenzekelayo
Meas. rhoqo 1 ngesekhondi
Ukulungelelanisa I-Digital offset kunye nohlengahlengiso lwesikali kumswakama kunye nobushushu
Min-/Max-value memory Ubuncinci kunye nobukhulu amaxabiso alinganisiweyo agciniwe
Umqondiso wemveliso I-EASYBus-protocol
Uqhagamshelwano I-2-wire EASYBus, i-polarity yasimahla
Ukulayishwa kwebhasi 1.5 I-EASYBus-izixhobo
Bonisa (kuphela ngokhetho VO) malunga. 10 mm ukuphakama, 4-digit LCD-bonisa
Izinto zokusebenza 3 izitshixo
Iimeko ze-Ambient Nom. ubushushu Ubushushu bokusebenza
Ukufuma okuhambelanayo Ubushushu bokugcina
25°C
I-Electronics: -25 … 50 °C, intloko yesivamvo kunye neshaft: -40 … 100 °C, ixesha elifutshane 120 °C kuKhetho "SHUT": isivamvo sentloko max.
80 °C
I-Electronics: 0 … 95 %RH (hayi ukujiya) -25 … 70 °C
Izindlu I-ABS (IP65, ngaphandle kwentloko yoluvo)
Imilinganiselo 82 x 80 x 55 mm (ngaphandle kweplagi yohlobo lwe-elbow kunye ne-sensor tube) yoKhetho "Kabel": Inzwa yentloko Ø14mm * 68mm, 1m intambo ye-teflon, inzwa yokufuma ephezulu
Ukunyuka Imingxuma yokuxhoma eludongeni (kwindlu - ifikeleleke emva kokuba isigqubuthelo sisusiwe).
Umgama onyukayo 50 x 70 mm, ubukhulu. I-shaft diameter ye-screws yokukhwela yi-4 mm
Uqhagamshelo lombane Iplagi yohlobo lwe-elbow ehambelana ne-DIN 43650 (IP65), ubuninzi. icandelo lomnqamlezo wocingo: 1.5 mm², ucingo/intambo ububanzi ukusuka kwi-4.5 ukuya kwi-7 mm
I-EMC Esi sixhobo sihambelana nomgangatho wokhuselo oluyimfuneko olusekwe kwiMigaqo yeBhunga loQeqesho loMthetho wamazwe angamalungu ngokumalunga nokuhambelana kwe-electromagnetic (2004/108/EG).
Ngokuhambelana ne-EN 61326-1 : 2006, iimpazamo ezongezelelweyo: <1 % FS.
Xa udibanisa ixesha elide likhokelela amanyathelo aneleyo ngokuchasene nomthamotagkufuneka kuthathwe amanyathelo.

GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli - logo 2H20.0.2X.6C1-07
Incwadi yokuSebenza ye-EBHT – 1R, 1K, 2K, Kabel / UNI GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli-Uphawu 1GREISINGER electronic GmbH
D – 93128 Regenstauf, Hans-Sachs-Straße 26
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli-Uphawu 2 +49 (0) 9402 / 9383-0
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli-Uphawu 3 +49 (0) 9402 / 9383-33
GREISINGER EBHT 1K UNI Easy Bus Sensor Modyuli-Uphawu 4 info@greisinger.de

Amaxwebhu / Izibonelelo

GREISINGER EBHT-1K-UNI Easy Bus Sensor Modyuli [pdf] Incwadi Yomyalelo
EBHT-1K-UNI Easy Bus Sensor Module, EBHT-1K-UNI, Easy Bus Sensor Module, Bus Sensor Module, Imodyuli yoluvo, imodyuli

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Idilesi yakho ye-imeyile ayizupapashwa. Iindawo ezifunekayo ziphawulwe *