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PUNOI: Fatjon Dashhana
Kendveshtrim i pergjithshem mbi
DPM
 Drejtoria eshte e organizuar sipas kesaj organigrame
Sektori mbi te cilin do te bejme
prezantimin eshte sektori elektrik.
Ky sektor merret ka ne themel kalibrimin e:
   1. instrumenteve mates te tensionit, rrymes dhe
   rezistences elektrike, dixhital apo analog, te rrymes se
   vazhduar dhe alternative.
   2. instrumenteve mates te tensionit dhe te rrymes ne AC
   dhe DC, me nje pasiguri me te vogel se 10-5
   3. Rezistencat kampion te diapazoneve nga 1mΩ deri ne 10
   MΩ, me nje pasiguri jo me te madhe se 2ppm.
Nje nder veprimtarite kryesore te ketij departamenti eshte
kalibrimi i baterive duke marre si reference
baterine732B/734A (e paraqitur ne figure).
Standarti 732B/734A

 Bateria standarte 732B ka dy dalje tensioni me vlere
 standarte njera 10V dhe tjetra 1.018V.

 Bateria 734A eshte nje bashkim i 4 baterive 732B te
 izoluara elektrikisht dhe mekanikisht nga njera-tjetra.
 Duke qene te tilla baterite 732B mund te shkeputen
 nga mbajtesja e 734A dhe mund te perdoren si
 standarte te pavarura.
Para se te flasim mbi hapat qe duhen ndjekur per kalibrimi i
baterive duke marre si reference baterine732B/734A le te shohim
menyren e ndertimit dhe funksionimit te keasj baterie.




                    Paneli ballor i njesise 732B DC
1 -Treguesi AC- Ndricon kur paisja eshte lidhur ne linjen AC
2-Treguesi IN CAL - Sherben per te lajmeruar kur paisja mund
   te mos jete kalibruar ose ka humbur kalibrimi.
3- Treguesi i ngarkimit- Ndricon kur bateria e brendeshme
eshte duke u ngarkuar me rryme konstante.
4- Treguesi LOW BAT- Pulson kur ngelen edhe rreth 5 ore
energji per te operuar.
5- Porta CHASSIS-Eshte pika e lidhjes se karkases me
token.
6- Porta GUARD- Tokezimi mbrojtes.
7-Porta 1.018V-Dalja pozitive e tensionit 1.018V.
8-Porta 1.018V COM-Lidhja e perbashket per daljen 1.018V.
9-Nr.serial-Indetifikon paisjen
10-Porta 10V COM-lidhja e perbashket per daljen 10V (per nje
sistem instrumentash).
11-Porta 10V-Dalja e terminalit pozitiv te tensionit 10V.
Matja e tensionit te 732B me
multimetrin standart 5700A.
                     Lidhja e standartit 732B
                      me multimetrin 5700A
                      behet si ne figure.
                     Duhet te theksohet se
                      daljet 1.018VCOM dhe
                      dalja 10V COM lidhet
                      elektrikisht me
                      mbrojtesit e
                      instrumentave te tjera
                      dhe te tokezohen ne nje
                      vend te vetem.
Shkaqet qe krijojne gabime gjate
matjeve jane:
 Renia e tensionit ne percjelles .Kjo ndodh per arsyen sepse vete
  percjellesi ka rezistence .
 Efekti termik ndikon ne rezistencen e percjellesit nese
  percjellesi mbahet per nje kohe te gjate i lidhur me baterine dhe
  multimetrin per nje kohe te gjate.
 Saktesia e multimetrit.
 Gabimet per shkak te levizjeve mekanike. Standarti 732B apo
  edhe multimetri nuk duhet te levizen gjate matjes.
 Per te menjanuar gabimet qe ndodhin si shkak i rezistences se
  percjellesit eshte prodhuar percjellesi i tipit te meposhtem ,i
  dhene ne figure ,i cili ben te mundur qe te kemi renie te tensionit
  ne percjelles sa me te vogla. Me poshte paraqitet tipi i percjellesit
  qe perdoret ne kalibrimet dhe matjet e ndryshme .
Kalibrimi i baterive te tjera duke
perdorur standartin 732B.
Per te bere kalibrimin e baterive te tipit 732B duke
    perdorur si standart nje njesine 732B na nevojiten
    kater elemente:
1. Bateria standarte 732B.
2. Njesia qe do te testohet (UUT-Unit Under Test).
3. Dedektori i nulit (zeros).
4. Percjellesa.
Skema baze e kalibrimit.
Skema baze parimore
                       Skema reale
Parimi i punes se kalibrimit
 Fillimisht lidhen standarti me njesine qe do te
  kalibrohet dhe me dedektuesin e zeros 845AB ne seri.
 Me pas ndizet bateria standarte dhe diferenca e
  tensionit te standartit me tensionin e baterise qe do te
  kalibrohet lexohat nga treguesi i zeros.
 Per te bere kalibrimin duhet qe treguesi i zeros te
  tregoje zero,cka do te thote qe tensioni i njesise qe do
  kalibrohet me standartin eshte i njejte.
 Per te bere kete duhet qe te levizim celesat te treguara
  ne figuren e meposhtme derisa te arrijme ate qe duam.
Vendndodhja e celesave te
            kalibrimit.
 Meqenese per kalibrim kemi marre nje bateri 73B te pa
  kalibruar atehere nen karkasen e baterise ndodhen
  disa celesa qe rrotullohen.
 Keto celesa perfaqesojne gabimin ne rendin e mV apo
  edhe te µV.
 Ne baze te rrutullimit te ketyre celesave ne mund te
  afrohemi barazimit te plote te tensionit te standartit
  me baterine te pa kalibruar
Vendodhja e celesave te kalibrimit
                  Pra pasi heqim kapakun
                  shohim qe kemi
                  disa vidha te cila kane
                  shenimet 0.1ppm
                  ose 1.0 ppm ose 10ppm.
                  Duke levizur keto vidha
                  marrim kalibrimin me
                  cilesine e kerkuar.
Remonti i baterise 732B

Bateria 732B perbehet nga disa njesi te cilat jane:
 Njesia A5 qe ben ushqimin e baterise.
 Njesia e dhomes frigoriferike.
 Njesia e transformatorit.
Figurat e meposhtme tregojne menyren se si vendoset
  dhe se si zevendeohe njesia A5.Enjejta gje behet edhe
  per njesite e tjera.
Zevendesimi i elementeve jepet ne
              figure:
FALEMINDERIT
PER VEMENDJEN TUAJ!

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Prezantimi i praktikes

  • 2. Kendveshtrim i pergjithshem mbi DPM  Drejtoria eshte e organizuar sipas kesaj organigrame
  • 3. Sektori mbi te cilin do te bejme prezantimin eshte sektori elektrik. Ky sektor merret ka ne themel kalibrimin e: 1. instrumenteve mates te tensionit, rrymes dhe rezistences elektrike, dixhital apo analog, te rrymes se vazhduar dhe alternative. 2. instrumenteve mates te tensionit dhe te rrymes ne AC dhe DC, me nje pasiguri me te vogel se 10-5 3. Rezistencat kampion te diapazoneve nga 1mΩ deri ne 10 MΩ, me nje pasiguri jo me te madhe se 2ppm.
  • 4. Nje nder veprimtarite kryesore te ketij departamenti eshte kalibrimi i baterive duke marre si reference baterine732B/734A (e paraqitur ne figure).
  • 5. Standarti 732B/734A  Bateria standarte 732B ka dy dalje tensioni me vlere standarte njera 10V dhe tjetra 1.018V.  Bateria 734A eshte nje bashkim i 4 baterive 732B te izoluara elektrikisht dhe mekanikisht nga njera-tjetra. Duke qene te tilla baterite 732B mund te shkeputen nga mbajtesja e 734A dhe mund te perdoren si standarte te pavarura.
  • 6. Para se te flasim mbi hapat qe duhen ndjekur per kalibrimi i baterive duke marre si reference baterine732B/734A le te shohim menyren e ndertimit dhe funksionimit te keasj baterie. Paneli ballor i njesise 732B DC
  • 7. 1 -Treguesi AC- Ndricon kur paisja eshte lidhur ne linjen AC 2-Treguesi IN CAL - Sherben per te lajmeruar kur paisja mund te mos jete kalibruar ose ka humbur kalibrimi. 3- Treguesi i ngarkimit- Ndricon kur bateria e brendeshme eshte duke u ngarkuar me rryme konstante. 4- Treguesi LOW BAT- Pulson kur ngelen edhe rreth 5 ore energji per te operuar. 5- Porta CHASSIS-Eshte pika e lidhjes se karkases me token. 6- Porta GUARD- Tokezimi mbrojtes. 7-Porta 1.018V-Dalja pozitive e tensionit 1.018V. 8-Porta 1.018V COM-Lidhja e perbashket per daljen 1.018V. 9-Nr.serial-Indetifikon paisjen 10-Porta 10V COM-lidhja e perbashket per daljen 10V (per nje sistem instrumentash). 11-Porta 10V-Dalja e terminalit pozitiv te tensionit 10V.
  • 8. Matja e tensionit te 732B me multimetrin standart 5700A.  Lidhja e standartit 732B me multimetrin 5700A behet si ne figure.  Duhet te theksohet se daljet 1.018VCOM dhe dalja 10V COM lidhet elektrikisht me mbrojtesit e instrumentave te tjera dhe te tokezohen ne nje vend te vetem.
  • 9. Shkaqet qe krijojne gabime gjate matjeve jane:  Renia e tensionit ne percjelles .Kjo ndodh per arsyen sepse vete percjellesi ka rezistence .  Efekti termik ndikon ne rezistencen e percjellesit nese percjellesi mbahet per nje kohe te gjate i lidhur me baterine dhe multimetrin per nje kohe te gjate.  Saktesia e multimetrit.  Gabimet per shkak te levizjeve mekanike. Standarti 732B apo edhe multimetri nuk duhet te levizen gjate matjes.
  • 10.  Per te menjanuar gabimet qe ndodhin si shkak i rezistences se percjellesit eshte prodhuar percjellesi i tipit te meposhtem ,i dhene ne figure ,i cili ben te mundur qe te kemi renie te tensionit ne percjelles sa me te vogla. Me poshte paraqitet tipi i percjellesit qe perdoret ne kalibrimet dhe matjet e ndryshme .
  • 11. Kalibrimi i baterive te tjera duke perdorur standartin 732B. Per te bere kalibrimin e baterive te tipit 732B duke perdorur si standart nje njesine 732B na nevojiten kater elemente: 1. Bateria standarte 732B. 2. Njesia qe do te testohet (UUT-Unit Under Test). 3. Dedektori i nulit (zeros). 4. Percjellesa.
  • 12. Skema baze e kalibrimit. Skema baze parimore  Skema reale
  • 13. Parimi i punes se kalibrimit  Fillimisht lidhen standarti me njesine qe do te kalibrohet dhe me dedektuesin e zeros 845AB ne seri.  Me pas ndizet bateria standarte dhe diferenca e tensionit te standartit me tensionin e baterise qe do te kalibrohet lexohat nga treguesi i zeros.  Per te bere kalibrimin duhet qe treguesi i zeros te tregoje zero,cka do te thote qe tensioni i njesise qe do kalibrohet me standartin eshte i njejte.  Per te bere kete duhet qe te levizim celesat te treguara ne figuren e meposhtme derisa te arrijme ate qe duam.
  • 14. Vendndodhja e celesave te kalibrimit.  Meqenese per kalibrim kemi marre nje bateri 73B te pa kalibruar atehere nen karkasen e baterise ndodhen disa celesa qe rrotullohen.  Keto celesa perfaqesojne gabimin ne rendin e mV apo edhe te µV.  Ne baze te rrutullimit te ketyre celesave ne mund te afrohemi barazimit te plote te tensionit te standartit me baterine te pa kalibruar
  • 15. Vendodhja e celesave te kalibrimit Pra pasi heqim kapakun shohim qe kemi disa vidha te cila kane shenimet 0.1ppm ose 1.0 ppm ose 10ppm. Duke levizur keto vidha marrim kalibrimin me cilesine e kerkuar.
  • 16. Remonti i baterise 732B Bateria 732B perbehet nga disa njesi te cilat jane:  Njesia A5 qe ben ushqimin e baterise.  Njesia e dhomes frigoriferike.  Njesia e transformatorit. Figurat e meposhtme tregojne menyren se si vendoset dhe se si zevendeohe njesia A5.Enjejta gje behet edhe per njesite e tjera.
  • 17. Zevendesimi i elementeve jepet ne figure: