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All Journal Jurnal Instrumentasi
Melati Azizka Fajria
Research Center for Metrology LIPI
Agriculture, Biological Sciences & Forestry Chemistry Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology

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IMPROVING CALIBRATION AND MEASUREMENT CAPABILITY (CMC) OF PSYCHROMETER CALIBRATION Arfan Sindhu Tistomo; Purwowibowo -; Rcahman Soleh; Melati Azizka Fajria; Ocka Hedrony
Instrumentasi Vol 42, No 1 (2018)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v42i1.86

Abstract

The improvement of Calibration Measurement Capability (CMC) for Psychrometer calibration has been done through calibrating a homemade psychrometer with two platinum resistance sensors as its  dry and wet bulb thermometers. The calibration range covers 15 %rh to 90 %rh in a temperature range from  25 °C to 65 °C. The uncertainty budget is evaluated from the individual quantity uncertainty following Ferrel equation. As results, not only the existing CMC is greatly improved from 5 %rh to 1.8 %rh but also the calibration uncertainty at each set point is in accordance to the review criteria uncertainty values for submitting relative humidity CMCs to the Appendix C of Bureau International des Poids et Mesures (BIPM).
Co-Authors Arfan Sindhu Tistomo Ocka Hedrony Purwowibowo - Rcahman Soleh