{"id":293943,"date":"2024-10-19T19:58:44","date_gmt":"2024-10-19T19:58:44","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-78822017\/"},"modified":"2024-10-25T17:10:57","modified_gmt":"2024-10-25T17:10:57","slug":"bs-78822017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-78822017\/","title":{"rendered":"BS 7882:2017"},"content":{"rendered":"

This British Standard specifies requirements for the calibration and classification of torque measuring devices, including those used for the calibration of torque tools.<\/p>\n

It describes the method of calibration, calculation of calibration results and the classification of the torque measuring device in a static mode. The information to be given on the certificate of calibration is also listed.<\/p>\n

Annex A provides diagrams of the application of torque, and examples for the calibration of torque measuring devices. Annex B indicates how to determine uncertainty of the calibration results of the torque measuring device.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
5<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Terms, definitions, abbreviations and symbols <\/td>\n<\/tr>\n
9<\/td>\n3 Preparation for calibration
3.1 Reference standard
Table 1 \u2014 Uncertainty of calibration torques <\/td>\n<\/tr>\n
10<\/td>\n3.2 Condition and identification of a torque measuring device
3.3 Resolution of the indicator <\/td>\n<\/tr>\n
11<\/td>\n3.4 Lower limit of calibration, Tmin
3.5 Number of calibration orientations (see Annex A) <\/td>\n<\/tr>\n
12<\/td>\n4 Preliminary procedure
4.1 Alignment
4.2 Temperature considerations
4.3 Instrumentation set-up
4.4 Preloading procedure
5 Calibration procedure
5.1 Selection of calibration torques <\/td>\n<\/tr>\n
13<\/td>\n5.2 Application of calibration torques
6 Calculation of results
6.1 Determination of deflection, d <\/td>\n<\/tr>\n
14<\/td>\n6.2 Determination of relative repeatability, R1
6.3 Determination of relative reproducibility, R2 <\/td>\n<\/tr>\n
15<\/td>\n6.4 Determination of relative errors of interpolation, Eit and Eitd <\/td>\n<\/tr>\n
16<\/td>\n6.5 Determination of relative residual deflection, R0
6.6 Determination of relative reversibility, R3
6.7 Determination of relative errors of indication, Ei and Eid <\/td>\n<\/tr>\n
17<\/td>\n6.8 Determination of uncertainty of measurement and relative measurement uncertainty interval
7 Classification of torque measuring devices
7.1 General
7.2 Determination of a classification and its range <\/td>\n<\/tr>\n
18<\/td>\nTable 2 \u2014 Criteria for classification of torque measuring devices
8 Calibration certificate <\/td>\n<\/tr>\n
20<\/td>\nAnnex A (informative)\u2002 Orientation diagrams
Figure A.1 \u2014 Example of preloading and calibration sequences for a torque measuring device with round shaft drives, six incremental and decremental torques, classes 0.05 to 5.0 <\/td>\n<\/tr>\n
22<\/td>\nAnnex B (normative)\u2002 Method example of determining uncertainty of the calibration results of the torque measuring device <\/td>\n<\/tr>\n
25<\/td>\nTable B.1 \u2014 Summary of worked examples
Table B.2 \u2014 Worked example in torque units: 100 N\u00b7m torque measuring device clockwise torque, incremental series only <\/td>\n<\/tr>\n
26<\/td>\nTable B.2 \u2014 Worked example in torque units: 100 N\u00b7m torque measuring device clockwise torque, incremental series only (continued)
Table B.2 \u2014 Worked example in torque units: 100 N\u00b7m torque measuring device clockwise torque, incremental series only (continued)
Table B.3 \u2014 Uncertainties calculated in accordance with B.3 <\/td>\n<\/tr>\n
27<\/td>\nTable B.3 \u2014 Uncertainties calculated in accordance with B.3 (continued) <\/td>\n<\/tr>\n
28<\/td>\nTable B.4 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental series
Table B.4 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental series (continued) <\/td>\n<\/tr>\n
29<\/td>\nTable B.4 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental series (continued)
Table B.5 \u2014 Uncertainties calculated in accordance with Annex B <\/td>\n<\/tr>\n
30<\/td>\nTable B.5 \u2014 Uncertainties calculated in accordance with Annex B (continued)
Table B.6 \u2014 Uncertainty interval calculated in accordance with Annex B <\/td>\n<\/tr>\n
31<\/td>\nTable B.6 \u2014 Uncertainty interval calculated in accordance with Annex B (continued) <\/td>\n<\/tr>\n
32<\/td>\nTable B.7 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental and decremental series <\/td>\n<\/tr>\n
33<\/td>\nTable B.7 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental series and decremental series (continued)
Table B.7 \u2014 Worked example in mV\/V: 2 kN\u00b7m torque measuring device clockwise torque, incremental series and decremental series (continued) <\/td>\n<\/tr>\n
34<\/td>\nTable B.8 \u2014 Uncertainties calculated in accordance with Annex B
Table B.8 \u2014 Uncertainties calculated in accordance with Annex B (continued) <\/td>\n<\/tr>\n
35<\/td>\nTable B.9 \u2014 Uncertainty interval calculated in accordance with Annex B
Table B.9 \u2014 Uncertainty interval calculated in accordance with Annex B (continued) <\/td>\n<\/tr>\n
36<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Method for calibration and classification of torque measuring devices<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2017<\/td>\n38<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":293947,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-293943","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\/293943","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\/293947"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=293943"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=293943"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=293943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}