Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam
Vol 1, No 2 (2014): Wisuda Oktober 2014

AUTOMATISASI KALIBRASI SENSOR SUHU PTC DAN NTC MEMPERGUNAKAN SUMBER TEGANGAN TERPROGRAM DAC7611

Herman Syahputra (Unknown)
Lazuardi Umar (Unknown)
Rahmondia Nanda Setiadi (Unknown)



Article Info

Publish Date
21 Jul 2014

Abstract

A system  calibration  of  PTC  and  NTC  temperature  sensor  using a preprogrammable voltage source based on DAC7611  was  designed.  Temperature  sensors  of  PTC  typethermistor used was a type of  RS  and  NTC  type  was  B57962  S282  using  a  standard voltage divider with resistance to both sensors. Sensor voltage was  increased with a step interval  of 1V  and  time  equilibrium  sensors  of  120  s.  The characteristic  of  the sensor were  modeled  in the form of  the curve  I(U)  based on the  self-heating  effect  (Self-Heating).  Results of  measurements  and  modeling  using  automatic  and  manual calibration  showed  two curves  coincided,  but  there  was  a difference  of  5,8mA maximum  current  for  the PTC  sensor  and  0,552mA  for  NTC  sensor.  These resultsindicated  that the  manufacturing  of  automatic  calibration system  worked  and  only  had  a small difference to the  manual calibration. This was due to the difference in  temperature of the ambient.

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