RANCANG BANGUN SISTEM KONTROL KADAR OKSIGEN DI DALAM AIR PADA KOLAM PEMBENIHAN IKAN LELE MUTIARA DI UNIT KERJA BUDIDAYA AIR TAWAR (UKBAT) WONOCATUR CANGKRINGAN, SLEMAN, YOGYAKARTA DESIGN OF DISSOLVED OXYGEN CONTROL SYSTEM IN THE WATER OF THE MUTIARA CATFISH HATCHERY POND IN DEPARTEMENT OF FISHERIES WONOCATUR CANGKRINGAN, SLEMAN, YOGYAKARTA

Abstract

Abstrak
Penelitian ini bertujuan untuk mengetahui cara membuat sensor polarografik, mengetahui rancang bangun
sistem kontrol oksigen terlarut pada kolam pembenihan lele dan mengetahui perbandingan hasil panen benih ikan
lele antara kolam pembenihan yang dipasang aerator dan kolam yang dipasang alat kontrol oksigen. Sensor
polarografik dibuat sebagai pendeteksi oksigen di dalam air dengan menggunakan katoda platina dan anoda perak
yang diberi KCl 0,1 M sebanyak 1,5 ml dan ditutup dengan membran PTFE. Arduino digunakan sebagai komparator
dan pemutar motor servo. Metode yang digunakan untuk menganalisis rangkaian sistem kontrol oksigen
adalah diagram blok. Hasil pengujian tegangan referensi sensor sebesar 0,7 V. Servo berputar 120° regulator
terbuka dan 180° saat regulator tertutup. Panjang rata-rata benih pada kolam yang diberi aerator sebesar
(1,8 ± 0,3) cm dan massa rata-ratanya (0,14 ± 0,06) gram. Sedangkan panjang rata-rata benih pada kolam yang
diberi alat pengendali oksigen sebesar (3,0 ± 0,5) cm dan massa rata-ratanya (0,3 ± 0,2) gram. Perbedaan panjang
rata-rata benih antara dua kolam signifikan, sedangkan perbedaan massa rata-rata kedua kolam tidak signifikan.
Kata kunci: sistem kontrol, oksigen, sensor polarografik, benih lele Mutiara
Abstract
This research was aimed to make polarographic oxygen sensor, to design dissolved oxygen control system
in the Mutiara catfish hatcery pond and to determine the ratio of catfish fry between the pond which used aerator
and the pond which used dissolved oxygen control device. Polarographic oxygen sensor was created as a detector
of the oxygen in the water used a platinum cathode and a silver anode which was added 1.5 ml of KCl 0.1 M, and
was covered with a PTFE membrane. Arduino was used as a comparator and servo motor controller. The method
used to analyse oxygen control system was block diagram. The result of the reference voltage of sensor was 0.7
V. Servo rotated 120°, regulators opened and 180° when the regulator was closed. The average length of the catfish
fry in the pond which used aerator was (1.8 ± 0.3) cm and the average mass was (0.14 ± 0.06) grams. While the
average length of catfish fry in the pond which used oxygen control system device was (3.0 ± 0.5) cm and average
mass was (0.3 ± 0.2) grams. The difference in average length of catfish fry between two pond was significant, while
the difference in average mass of both was insignificant.
Keywords: control system, oxygen, polarographic oxygen sensor, fry of Mutiara catfish