IMPROVING CALIBRATION AND MEASUREMENT CAPABILITY (CMC) OF PSYCHROMETER CALIBRATION

Arfan Sindhu Tistomo, Purwowibowo -, Rcahman Soleh, Melati Azizka Fajria, Ocka Hedrony

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).

Keywords


humidity; dew point ;measurement; calibration; CMC;Psychrometer

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DOI: http://dx.doi.org/10.14203/instrumentasi.v42i1.86

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Copyright &copy 2015 Jurnal Instrumentasi (p-ISSN: 0125-9202, e-ISSN:2460-1462). All Rights Reserved.



Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.