PERANCANGAN DAN PENGUJIAN ALAT PENGUKUR SUHU DAN RH MENGGUNAKAN MIKRO KONTROLER AT89C51 UNTUK PENGERING
ABSTRACT: The objectives of
this research were to design and to produce relative humidity and temperature
controlling devices using the Micro controller AT89C51 hardware and to control
the heater performance of a dryer. The works was carried out in three stages:
designing, constructing and performance testing of the devices. The associated
apparatus includes the SHT 75 sensor, a keypad, an LCD, and a driver relay. The
“Assembler” language was used to develop a computer software. The output of
measurements of the product temperatures and relative humidities of the air
were used to control the heater and blower operation during drying. The readings of the developed devices were
compared with the ones using the corresponding conventional apparatus.
The results showed that the devices works well for measurement of a set
values of RH and temperature. Compared with the conventional method, the
difference in readings were in the order of 0.07oC to 0.53oC (temperature) and
0.16 to 0.98% for RH in the range of RH between 75 – 79%.
Key words: temperature and RH
control, drying, Micro controller AT89C51, SHT75 sensor
Penulis: Sumardi H. S.,
Bambang Dwi Argo, Dian Umniyati
Kode Jurnal: jppertaniandd050038
