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Inter-Laboratory Comparison for Calibration of Relative Humidity Devices Among Accredited Laboratories in Malaysia

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Abstract

An inter-laboratory comparison in relative humidity measurements among accredited laboratories has been coordinated by the National Metrology Institute of Malaysia. It was carried out to determine the performance of the participating laboratories. The objective of the comparison was to acknowledge the participating laboratories competencies and to verify the level of accuracies declared in their scope of accreditation, in accordance with the MS ISO/IEC 17025 accreditation. The measurement parameter involved was relative humidity for the range of 30–90 %rh at a nominal temperature of \(50\,{^\circ }\hbox {C}\). Eight accredited laboratories participated in the inter-laboratory comparison. Two units of artifacts have been circulated among the participants as the transfer standards.

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References

  1. APMP Comparison in Humidity APMP.T-K8 Dew Point Temperature \(+\)30 \(^{\circ }\text{C}\) to \(+\)95 \(^{\circ }\text{ C }\), Technical protocol (v120625) (2012)

  2. http://www.bipm.org/en/bipm/comparisons/ (2014)

  3. Malaysian Law Act 675, National Measurement System Act (2007)

  4. S. Khairuddin, Instruction to Participant PT2-3 Calibration of Relative Humidity 30 %rh to 90 %rh at nominal temperature of \(50\,^{\circ }\text{ C }\) (NML, 2012)

  5. F. Hussain, Technical Procedures and Method for Measurement and Calibration of Humidity Devices (NML, 2000)

  6. ISO/IEC Guide 98-3, Uncertainty of Measurement—Part 3: Guide to the Expression of Uncertainty in Measurement (2008)

  7. S. Bell, M. Stevens, A Guide to Calculating Uncertainty in Humidity Measurement, Measurement Good Practice Guide No. 59 (NPL, 2003)

  8. A Guide to the Measurement of Humidity (NPL, 1996)

  9. S. Khairuddin, Final Report PT2-3 Calibration of Relative Humidity 30 %rh to 90 %rh at Nominal Temperature of \(50\,^{\circ }\text{ C }\) (NML, 2013)

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Acknowledgements

The inter-laboratory comparison described in this paper was financially supported by SIRIM Berhad and Ministry of Science, Technology and Innovation (MOSTI), Malaysia, while the technical supports in this program came from Humidity and Moisture Laboratory, National Metrology Institute of Malaysia. All the participant scopes of accreditation have been supported by the Department STANDARD MALAYSIA as the national accreditation body. The authors would like to express great appreciation to Dr Nasir Zainal Abidin and all organizations involved directly or indirectly for their valuable support.

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Authors and Affiliations

  1. National Metrology Institute of Malaysia, Lot Pt 4803, Bandar Baru Salak Tinggi, 43900, Sepang, Selangor, Malaysia

    F. Hussain, S. Khairuddin & H. Othman

Authors
  1. F. Hussain
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  2. S. Khairuddin
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  3. H. Othman
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Correspondence to F. Hussain.

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Hussain, F., Khairuddin, S. & Othman, H. Inter-Laboratory Comparison for Calibration of Relative Humidity Devices Among Accredited Laboratories in Malaysia. Int J Thermophys 38, 15 (2017). https://doi.org/10.1007/s10765-016-2149-7

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  • DOI: https://doi.org/10.1007/s10765-016-2149-7

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