{"id":302281,"date":"2024-10-19T20:38:59","date_gmt":"2024-10-19T20:38:59","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-278912015\/"},"modified":"2024-10-25T18:09:37","modified_gmt":"2024-10-25T18:09:37","slug":"bs-iso-278912015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-278912015\/","title":{"rendered":"BS ISO 27891:2015"},"content":{"rendered":"

This International Standard describes methods to determine the detection efficiency of condensation particle counters (CPCs) at particle number concentrations ranging between 1 cm-3<\/sup> and 105<\/sup> cm-3<\/sup>, together with the associated measurement uncertainty. In general, the detection efficiency will depend on the particle number concentration, the particle size, and the particle composition. The particle sizes covered by the methods described in this International Standard range from approximately 5 nm to 1 000 nm.<\/p>\n

The methods can therefore be used both to determine a CPC calibration factor to be applied across the range of larger particle sizes where the detection efficiency is relatively constant (the plateau efficiency), and to characterize the drop in CPC detection efficiency at small particle sizes, near the lower detection limit. These parameters are described in more detail in Annex A.<\/p>\n

The methods are suitable for CPCs whose inlet flows are between approximately 0,1 l\/min and 5 l\/min.<\/p>\n

This International Standard describes a method for estimating the uncertainty of a CPC calibration performed according to this International Standard.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
11<\/td>\n1\tScope
2\tNormative references
3\tTerms and definitions <\/td>\n<\/tr>\n
15<\/td>\n4\tSymbols <\/td>\n<\/tr>\n
18<\/td>\n5\tCalibration using reference instruments \u2014 General principles
5.1\tGeneral principles <\/td>\n<\/tr>\n
19<\/td>\n5.2\tObjectives for the calibration aerosol
5.3\tSetup overview <\/td>\n<\/tr>\n
20<\/td>\n5.4\tComponents and their requirements
5.4.1\tPrimary aerosol source <\/td>\n<\/tr>\n
21<\/td>\n5.4.2\tCharge conditioner
5.4.3\tDEMC
5.4.4\tMake-up or bleed air <\/td>\n<\/tr>\n
22<\/td>\n5.4.5\tMixing device, flow splitter and connection tubing
5.4.6\tReference instrument: FCAE or CPC <\/td>\n<\/tr>\n
24<\/td>\n5.4.7\tOther tools
5.5\tDifferences between FCAE and CPC as a reference instrument <\/td>\n<\/tr>\n
25<\/td>\n6\tCalibration using an FCAE as reference instrument
6.1\tOverview of the setup and calibration procedure <\/td>\n<\/tr>\n
28<\/td>\n6.2\tPreparation
6.2.1\tGeneral preparation
6.2.2\tPrimary aerosol
6.2.3\tOther equipment
6.2.4\tDEMC <\/td>\n<\/tr>\n
29<\/td>\n6.2.5\tFCAE <\/td>\n<\/tr>\n
30<\/td>\n6.2.6\tTest CPC <\/td>\n<\/tr>\n
31<\/td>\n6.2.7\tCheck of the complete setup <\/td>\n<\/tr>\n
33<\/td>\n6.3\tCalibration procedure of detection efficiency
6.3.1\tGeneral
6.3.2\tDEMC diameter adjustment
6.3.3\tPrimary aerosol adjustment <\/td>\n<\/tr>\n
34<\/td>\n6.3.4\tSplitter bias \u03b2 measurement
6.3.5\tTest CPC efficiency measurement <\/td>\n<\/tr>\n
36<\/td>\n6.3.6\tMeasurement of different particle concentrations
6.3.7\tMeasurement of different sizes
6.3.8\tRepetition of first measurement point
6.3.9\tPreparation of the calibration certificate
6.4\tMeasurement uncertainty
6.4.1\tGeneral <\/td>\n<\/tr>\n
37<\/td>\n6.4.2\tParticle size
6.4.3\tDetection efficiency <\/td>\n<\/tr>\n
38<\/td>\n6.4.4\tParticle number concentration
7\tCalibration using a CPC as reference instrument
7.1\tOverview of the setup and calibration procedure <\/td>\n<\/tr>\n
41<\/td>\n7.2\tPreparation
7.2.1\tGeneral preparation
7.2.2\tPrimary aerosol
7.2.3\tOther equipment
7.2.4\tDEMC <\/td>\n<\/tr>\n
42<\/td>\n7.2.5\tReference CPC <\/td>\n<\/tr>\n
43<\/td>\n7.2.6\tTest CPC
7.2.7\tCheck of the complete setup <\/td>\n<\/tr>\n
45<\/td>\n7.3\tCalibration procedure of detection efficiency
7.3.1\tGeneral
7.3.2\tDEMC diameter adjustment <\/td>\n<\/tr>\n
46<\/td>\n7.3.3\tPrimary aerosol adjustment
7.3.4\tSplitter bias \u03b2 measurement <\/td>\n<\/tr>\n
47<\/td>\n7.3.5\tTest CPC efficiency measurement <\/td>\n<\/tr>\n
48<\/td>\n7.3.6\tMeasurement of different particle concentrations
7.3.7\tMeasurement of different sizes
7.3.8\tRepetition of first measurement point
7.3.9\tPreparation of the calibration certificate
7.4\tMeasurement uncertainty
7.4.1\tGeneral <\/td>\n<\/tr>\n
49<\/td>\n7.4.2\tParticle size
7.4.3\tDetection efficiency <\/td>\n<\/tr>\n
50<\/td>\n7.4.4\tParticle number concentration
8\tReporting of results <\/td>\n<\/tr>\n
52<\/td>\nAnnex\u00a0A (informative) CPC performance characteristics <\/td>\n<\/tr>\n
61<\/td>\nAnnex\u00a0B (informative) Effect of particle surface properties on the CPC detection efficiency <\/td>\n<\/tr>\n
63<\/td>\nAnnex\u00a0C (informative) Example calibration certificates <\/td>\n<\/tr>\n
72<\/td>\nAnnex\u00a0D (normative) Calculation of the CPC detection efficiency <\/td>\n<\/tr>\n
83<\/td>\nAnnex\u00a0E (informative) Traceability diagram <\/td>\n<\/tr>\n
85<\/td>\nAnnex\u00a0F (informative) Diluters <\/td>\n<\/tr>\n
88<\/td>\nAnnex\u00a0G (normative) Evaluation of the concentration bias correction factor between the inlets of the reference instrument and test CPC <\/td>\n<\/tr>\n
93<\/td>\nAnnex\u00a0H (informative) Extension of calibration range to lower concentrations <\/td>\n<\/tr>\n
100<\/td>\nAnnex\u00a0I (informative) Example of a detection efficiency measurement <\/td>\n<\/tr>\n
116<\/td>\nAnnex\u00a0J (normative) Volumetric flow rate calibration <\/td>\n<\/tr>\n
118<\/td>\nAnnex\u00a0K (normative) Testing the charge conditioner and the DEMC at maximum particle number concentration <\/td>\n<\/tr>\n
119<\/td>\nAnnex\u00a0L (informative) A recommended data recording method when using a reference FCAE <\/td>\n<\/tr>\n
121<\/td>\nAnnex\u00a0M (informative) Uncertainty of detection efficiency due to particle size uncertainty <\/td>\n<\/tr>\n
123<\/td>\nAnnex\u00a0N (informative) Application of calibration results <\/td>\n<\/tr>\n
126<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Aerosol particle number concentration. Calibration of condensation particle counters<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n132<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":302287,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-302281","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/302281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/302287"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=302281"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=302281"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=302281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}