Page 339 - Electrician -1st Year - TT

Fig 2

Up¥ÁhP¬u vúLp (Scale of multimeter) :
Fig 3
¸rLiPYt±tÏ R²VôL vúLpLs
AûUdLlThÓs[Õ.
• ªuRûPLs
• ªu]ÝjRm Utßm ªuú]ôhPm
(Fig 5)

ªuú]ôhPm Utßm ªu]ÝjRm
B¡VYt±u scale NUUôL ©¬dLlThÓs[Õ.
FUNCTION Ñ®hf«u setting-ûV ùTôÚjÕ
Km ÁhP¬u vúLp NUUôL
Ñ®hf B]Õ 2.5 volts -p ¨ûX ©¬dLlTP®pûX. (non-linear)
¨ßjRlThÓs[Õ. (Fig 4)
ùTôÕYôL scale ©uTdLUôLÜm zero YXÕ

Fig 4 TdLUôL CÚdÏm.
úYûX ùNnÙm ùLôsûL (Principle of work-
ing): Fig 6 þp AmÁhPWôL úYûX ùNnÙm
úTôÕ Es[ ªuÑtß Lôi©dLl
ThÓs[Õ.
ÁhPo CVdLj§tÏ CûP«p Nuh (shunt)
ªuRûP ûYdLlThÓs[Õ. úUÛm ØÝ
®XLXõu úTôÕ 0.05 mA dÏ A§LUôL
ªuú]ôhPm YÚm ùTôÝÕ bypass
ùNnVlTÓ¡\Õ. ªuú]ôhP A[ûY
A[lTRtÏ úWug Ñ®hf êXm N¬Vô]
Fig 5 Nuh (shunt) ªuRûPûV úRoÜ ùNnÕ
A[dLlTÓ¡\Õ.
Fig 7-p úYôph ÁhPWôL úYûX ùNnÙm
úTôÕ Es[ ªuÑtß Lôi©dLl
ThÓs[Õ. ÁhPo Lô«Xõp EiPôÏm
ªu]ÝjR Årf£ A§p ùNpÛm
ªuú]ôhPm Utßm ARu ªuRûPûV
ùTôÚjRRôÏm. Fig 7-p 50 mV dÏ A§LUô]
ªu]ÝjRm GqYôß A[dLlTÓ¡\Õ
GuTÕ Lôi©dLl ThÓs[Õ. ùYqúYß
A[ÜLs ùLôiP Up¥©ú[Vo (multiplier)
ªuRûPLs ÁhPo CVdLj§tÏ ùRôPo

TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.10.85 & 86 319