{"id":315078,"date":"2024-10-19T21:42:35","date_gmt":"2024-10-19T21:42:35","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-6145-22014\/"},"modified":"2024-10-25T19:50:25","modified_gmt":"2024-10-25T19:50:25","slug":"bs-iso-6145-22014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-6145-22014\/","title":{"rendered":"BS ISO 6145-2:2014"},"content":{"rendered":"

ISO 6145 comprises a series of International Standards dealing with various dynamic methods used for the preparation of calibration gas mixtures. This part of ISO 6145 describes a method and preparation system using piston pumps. The mixture composition and its associated uncertainty are based on calibration of the piston pumps by dimensional measurements.<\/p>\n

The calibration gas mixtures prepared using this method consist of two or more components, prepared from pure gases or other gas mixtures using gas-mixing pumps. Such gas-mixing pumps contain at least two piston pumps, each driven with a defined ratio of strokes, and appropriate accessories for gas feeding and mixture homogenization.<\/p>\n

This part of ISO 6145 is applicable only to mixtures of gaseous or totally vaporized components including corrosive gases, as long as these components neither react with each other nor with the wetted surfaces of the mixing pump. The use of gas mixtures as parent gases is covered as well. Multi-component gas mixtures and multi-step dilution procedures are included in this International Standard as they are considered to be special cases of the preparation of two-component mixtures.<\/p>\n

This part of ISO 6145 describes a method of preparing calibration gas mixtures whose composition is expressed in volume fractions. The necessary equations and associated uncertainty evaluation to express the gas composition in amount\u2013of\u2013substance fractions are given in Annex A.<\/p>\n

With this method, provided that sufficient quality assurance and control measures are taken, calibration gas mixtures can be prepared with a relative expanded uncertainty of 0,5 % (coverage factor k<\/i> = 2) in the volume fraction. Numerical examples showing that under specified conditions smaller uncertainties are attainable are given in Annexes B through D.<\/p>\n

Using this method, dilution ratios of 1:10 000 can be achieved in discrete increments. Lower fractions (down to 1 \u00d7 10\u22128<\/sup>) can be achieved by multi-stage dilution or by the use of gas mixtures as input gases. Final mixture flow rates of 5 l\/h to 500 l\/h can be realized depending on the equipment used.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\nSection sec_1
Section sec_2
1\tScope
2\tNormative references <\/td>\n<\/tr>\n
8<\/td>\nSection sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
Section sec_3.6
Section sec_4
3\tTerms and definitions
4\tSymbols <\/td>\n<\/tr>\n
9<\/td>\nSection sec_5
Section sec_5.1
Section sec_5.2
5\tPrinciple and equipment
5.1\tPrinciple
5.2\tEquipment <\/td>\n<\/tr>\n
10<\/td>\nTable tab_b
Figure fig_1 <\/td>\n<\/tr>\n
11<\/td>\nTable tab_c
Figure fig_2
Section sec_6
Section sec_6.1
6\tCalibration gas mixture preparation
6.1\tSafety issues <\/td>\n<\/tr>\n
12<\/td>\nSection sec_6.2
6.2\tMixture feasibility <\/td>\n<\/tr>\n
13<\/td>\nSection sec_6.3
Section sec_6.4
Section sec_6.5
Section sec_6.6
6.3\tPreparation system and setting-up of mixture composition
6.4\tInput pressure control
6.5\tTemperature control
6.6\tHomogenization <\/td>\n<\/tr>\n
14<\/td>\nSection sec_6.7
Section sec_6.8
Section sec_6.9
6.7\tStability
6.8\tOutput pressure and flow pulsation
6.9\tComposition of the parent gases <\/td>\n<\/tr>\n
15<\/td>\nSection sec_7
Section sec_7.1
7\tCalculation of volume fractions and associated uncertainty evaluation
7.1\tCalculation method A <\/td>\n<\/tr>\n
16<\/td>\nSection sec_7.2
Section sec_7.2.1
7.2\tCalculation method B <\/td>\n<\/tr>\n
17<\/td>\nSection sec_7.2.2
Section sec_7.2.3 <\/td>\n<\/tr>\n
18<\/td>\nSection sec_8
8\tGas mixture composition verification <\/td>\n<\/tr>\n
19<\/td>\nAnnex sec_A
Annex sec_A.1
Annex\u00a0A
\n(normative)<\/p>\n

Amount-of-substance fractions <\/td>\n<\/tr>\n

20<\/td>\nAnnex sec_A.2 <\/td>\n<\/tr>\n
21<\/td>\nAnnex sec_B
Annex sec_B.1
Table tab_B.1
Annex\u00a0B
\n(informative)<\/p>\n

Uncertainty evaluation of the gas mixture composition <\/td>\n<\/tr>\n

22<\/td>\nAnnex sec_B.2
Annex sec_B.2.1
Annex sec_B.2.2
Table tab_B.2 <\/td>\n<\/tr>\n
23<\/td>\nAnnex sec_B.2.3
Annex sec_B.3 <\/td>\n<\/tr>\n
24<\/td>\nTable tab_B.3 <\/td>\n<\/tr>\n
25<\/td>\nAnnex sec_B.4 <\/td>\n<\/tr>\n
26<\/td>\nTable tab_d
Figure fig_B.1 <\/td>\n<\/tr>\n
27<\/td>\nAnnex sec_C
Annex sec_C.1
Annex sec_C.2
Annex\u00a0C
\n(informative)<\/p>\n

Gas mixture verification <\/td>\n<\/tr>\n

28<\/td>\nTable tab_C.1
Annex sec_C.3
Annex sec_C.4 <\/td>\n<\/tr>\n
29<\/td>\nTable tab_C.2
Annex sec_C.5 <\/td>\n<\/tr>\n
30<\/td>\nTable tab_C.3 <\/td>\n<\/tr>\n
31<\/td>\nAnnex sec_D
Annex sec_D.1
Table tab_D.1
Annex\u00a0D
\n(informative)<\/p>\n

Numerical example <\/td>\n<\/tr>\n

32<\/td>\nAnnex sec_D.2
Table tab_D.2 <\/td>\n<\/tr>\n
33<\/td>\nTable tab_D.3
Annex sec_D.3 <\/td>\n<\/tr>\n
34<\/td>\nTable tab_D.4 <\/td>\n<\/tr>\n
35<\/td>\nTable tab_D.5
Table tab_D.6
Table tab_D.7 <\/td>\n<\/tr>\n
36<\/td>\nReference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Reference ref_5
Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Gas analysis. Preparation of calibration gas mixtures using dynamic methods – Piston pumps<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2014<\/td>\n40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":315084,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1000,2641],"product_tag":[],"class_list":{"0":"post-315078","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-71-040-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/315078","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\/315084"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=315078"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=315078"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=315078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}