Disain Alat Pengukur RH digital Berdasarkan Konduktifitas Larutan Elektrolit

(1)

DISWIM

ALAT PEHGBBKUR

RH

DIGITAL BERDBSARKISIM

MONDUKTlFlBAS LARUBAN EbEKTROLiT

o l e h

PHILIPUS

G U N A W A N EBA SUTANTA

F

18.0073

1 9 8 8

FAKULTAS TEKNOLOGI PERT ANlAN

INSTITUT PERTANIAN BOGOR

(2)

(3)

D I S A I N ALA'I' PENGUKUR 1211 DIGITAI, DISIZDA5;RRKBN

(4)

(5)

U n i t p e n g u b a h t e g a n g a n k e f r e k w e n s i d i m o d i f i k a s i s e - h i n g g a d a p a t l a n g s u n g menun j u k k n a n o 1 j i k a masukkan d i b e r i

t e g a n g a n 0 v o l t . Modif i k a s i i n i d e n g a n menambahkan

t a h a n a n s e b e s a r 100 Kohm p a r a l e l d e n g a n k o n d e n s a t o r ( C 1 ) .

Hal i n i b e r t u j u a n s u p a y a p e n g o s o n g a n m u a t a n k o n d e n s a t o r

d a p a t b e r j a l a n s e c a r a r e p a t .

H a s i l p e n g u j i a n d a l a m p e n g u k u r a n RH u d a r a m e n u n j u k k a n

b a h w a a l a t menyimpang s e k i t a r 4 % . P e n y i m p a n g a n i n i t e r -

j a d i d i d u g a a l a t s e b a g a i p e m b a n d i n g mempunyai k e t e l i t i a n

5 X , a t a u k e t e l i t i a n d a l a m p e m b u a t a n t r a n s d u s e r l a r u t a n

e l e k t r o l i t .

T r a n s d u s e r y a n g d i b u a t d e n g a n m e n g g u n a k a n l a r u t a n KOH

b e r u m u r s e k i t a r 3 b u l a n , s e t e l a h j a n g k a w a k t u i n i a l a t t i -

d a k p e k a l a g i , h a 1 i n i d i d u g a l a r u t a n KOH t e l a h b e r u b a h

s e h i n g g a t i d a k h i g r o k o p i s l a g i a t a u t e l a h t e r h i d r o l i s a .

R e s p o n s e n s o r y a n g l a m b a t m e m

c o k s e b a g a i p e n g u k u r RH d a l a m p e n g e r i n g a n . Den

t i p i s s p a n s e h i n g g a l a r u t a n KOH m e n j a d i

on s e n s o r m e n j a d i l e b i h c e p a t . Hal i n i

(6)

KATA PENGANTAR

(7)

(8)

J J

I

PENDEIGITAN RAtTCAkJ~G!it,I

. .

. . . . . .

.

. .

.

30

(9)

. . .

'(1

.

liESIMPiJLAt.1 DAN S A R m

.

7 4

A

.

IcESIMFliLALJ

. . .

7 4

B

.

SARAN

. . .

75

(10)

Ha

1

arnarl Gamhar 1. P r i n s i p h i g r o m e t e r k e r t a s

. . .

4

C

Gambar 2 . P r i n s i p h i g r n m e t e r rambut

. . .

..I

Gamhar 3 . _{Huburigan k o n s e n t r a s i dengar1}_RH

.

6

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DISWIM

ALAT PEHGBBKUR

RH

DIGITAL BERDBSARKISIM

MONDUKTlFlBAS LARUBAN EbEKTROLiT

o l e h

PHILIPUS

G U N A W A N EBA SUTANTA

F

18.0073

1 9 8 8

FAKULTAS TEKNOLOGI PERT ANlAN

INSTITUT PERTANIAN BOGOR

(110)

(111)

D I S A I N ALA'I' PENGUKUR 1211 DIGITAI, DISIZDA5;RRKBN

(112)

(113)

U n i t p e n g u b a h t e g a n g a n k e f r e k w e n s i d i m o d i f i k a s i s e - h i n g g a d a p a t l a n g s u n g menun j u k k n a n o 1 j i k a masukkan d i b e r i

t e g a n g a n 0 v o l t . Modif i k a s i i n i d e n g a n menambahkan

t a h a n a n s e b e s a r 100 Kohm p a r a l e l d e n g a n k o n d e n s a t o r ( C 1 ) .

Hal i n i b e r t u j u a n s u p a y a p e n g o s o n g a n m u a t a n k o n d e n s a t o r

d a p a t b e r j a l a n s e c a r a r e p a t .

H a s i l p e n g u j i a n d a l a m p e n g u k u r a n RH u d a r a m e n u n j u k k a n

b a h w a a l a t menyimpang s e k i t a r 4 % . P e n y i m p a n g a n i n i t e r -

j a d i d i d u g a a l a t s e b a g a i p e m b a n d i n g mempunyai k e t e l i t i a n

5 X , a t a u k e t e l i t i a n d a l a m p e m b u a t a n t r a n s d u s e r l a r u t a n

e l e k t r o l i t .

T r a n s d u s e r y a n g d i b u a t d e n g a n m e n g g u n a k a n l a r u t a n KOH

b e r u m u r s e k i t a r 3 b u l a n , s e t e l a h j a n g k a w a k t u i n i a l a t t i -

d a k p e k a l a g i , h a 1 i n i d i d u g a l a r u t a n KOH t e l a h b e r u b a h

s e h i n g g a t i d a k h i g r o k o p i s l a g i a t a u t e l a h t e r h i d r o l i s a .

R e s p o n s e n s o r y a n g l a m b a t m e m

c o k s e b a g a i p e n g u k u r RH d a l a m p e n g e r i n g a n . Den

t i p i s s p a n s e h i n g g a l a r u t a n KOH m e n j a d i

on s e n s o r m e n j a d i l e b i h c e p a t . Hal i n i

(114)

KATA PENGANTAR

(115)

(116)

J J

I

PENDEIGITAN RAtTCAkJ~G!it,I

. .

. . . . . .

.

. .

.

30

(117)

. . .

'(1

.

liESIMPiJLAt.1 DAN S A R m

.

7 4

A

.

IcESIMFliLALJ

. . .

7 4

B

.

SARAN

. . .

75

(118)

Ha

1

arnarl Gamhar 1. P r i n s i p h i g r o m e t e r k e r t a s

. . .

4

C

Gambar 2 . P r i n s i p h i g r n m e t e r rambut

. . .

..I

Gamhar 3 . _{Huburigan k o n s e n t r a s i dengar1}_RH

.

6