Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing

Jankovic, John; Zontek, Tracy L.; Ogle, Burton R.; Hollenbeck, Scott

doi:10.1080/15459624.2015.1009990

Title: Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing

Abstract

We examined the calibration records of two direct reading instruments designated as condensation particle counters in order to determine the number of times they were found to be out of tolerance at annual manufacturer's recalibration. For both instruments were found to be out of tolerance more times than within tolerance. And, it was concluded that annual calibration alone was insufficient to provide operational confidence in an instrument's response. Thus, a method based on subsequent agreement with data gathered from a newly calibrated instrument was developed to confirm operational readiness between annual calibrations, hereafter referred to as bump testing. The method consists of measuring source particles produced by a gas grille spark igniter in a gallon-size jar. Sampling from this chamber with a newly calibrated instrument to determine the calibrated response over the particle concentration range of interest serves as a reference. Agreement between this reference response and subsequent responses at later dates implies that the instrument is performing as it was at the time of calibration. Side-by-side sampling allows the level of agreement between two or more instruments to be determined. This is useful when simultaneously collected data are compared for differences, i.e., background with process aerosol concentrations. A referencemore »« less

Authors:

Jankovic, John ^[1]; Zontek, Tracy L. ^[2]; Ogle, Burton R. ^[2]; Hollenbeck, Scott ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Western Carolina Univ., Cullowhee, NC (United States)

Publication Date:: Tue Jan 27 00:00:00 EST 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1287008

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Occupational and Environmental Hygiene

Additional Journal Information:: Journal Volume: 12; Journal Issue: 7; Journal ID: ISSN 1545-9624

Publisher:: Taylor and Francis

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; air monitoring; calibration; condensation particle counter; nanoscale material

Citation Formats


                    Jankovic, John, Zontek, Tracy L., Ogle, Burton R., and Hollenbeck, Scott. Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing.  United States: N. p., 2015. 
Web.  doi:10.1080/15459624.2015.1009990.

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                    Jankovic, John, Zontek, Tracy L., Ogle, Burton R., & Hollenbeck, Scott. Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing.  United States.  https://doi.org/10.1080/15459624.2015.1009990

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                    Jankovic, John, Zontek, Tracy L., Ogle, Burton R., and Hollenbeck, Scott. Tue .  
"Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing".  United States.  https://doi.org/10.1080/15459624.2015.1009990.  https://www.osti.gov/servlets/purl/1287008.

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@article{osti_1287008,

  title        = {Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing},

  author       = {Jankovic, John and Zontek, Tracy L. and Ogle, Burton R. and Hollenbeck, Scott},

  abstractNote = {We examined the calibration records of two direct reading instruments designated as condensation particle counters in order to determine the number of times they were found to be out of tolerance at annual manufacturer's recalibration. For both instruments were found to be out of tolerance more times than within tolerance. And, it was concluded that annual calibration alone was insufficient to provide operational confidence in an instrument's response. Thus, a method based on subsequent agreement with data gathered from a newly calibrated instrument was developed to confirm operational readiness between annual calibrations, hereafter referred to as bump testing. The method consists of measuring source particles produced by a gas grille spark igniter in a gallon-size jar. Sampling from this chamber with a newly calibrated instrument to determine the calibrated response over the particle concentration range of interest serves as a reference. Agreement between this reference response and subsequent responses at later dates implies that the instrument is performing as it was at the time of calibration. Side-by-side sampling allows the level of agreement between two or more instruments to be determined. This is useful when simultaneously collected data are compared for differences, i.e., background with process aerosol concentrations. A reference set of data was obtained using the spark igniter. The generation system was found to be reproducible and suitable to form the basis of calibration verification. Finally, the bump test is simple enough to be performed periodically throughout the calibration year or prior to field monitoring.},

  doi          = {10.1080/15459624.2015.1009990},

  journal      = {Journal of Occupational and Environmental Hygiene},

  number       = 7,

  volume       = 12,

  place        = {United States},

  year         = {Tue Jan 27 00:00:00 EST 2015},

  month        = {Tue Jan 27 00:00:00 EST 2015}

}

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Journal Article:

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Works referenced in this record:

Statistical Methods for Assessing Agreement Between two Methods of Clinical Measurement
journal, February 1986

Martin Bland, J.; Altman, DouglasG.
The Lancet, Vol. 327, Issue 8476
DOI: 10.1016/S0140-6736(86)90837-8

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Title: Direct Reading Particle Counters: Calibration Verification and Multiple Instrument Agreement via Bump Testing

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Citation Formats

Statistical Methods for Assessing Agreement Between two Methods of Clinical Measurement journal, February 1986

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