{"id":385936,"date":"2024-10-20T03:33:03","date_gmt":"2024-10-20T03:33:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-16840-122021\/"},"modified":"2024-10-26T06:28:11","modified_gmt":"2024-10-26T06:28:11","slug":"bs-iso-16840-122021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-16840-122021\/","title":{"rendered":"BS ISO 16840-12:2021"},"content":{"rendered":"<p>This document specifies apparatus, test methods, and disclosure requirements for characterization of wheelchair seat cushion immersion and envelopment properties using indenters instrumented with pressure sensors.<\/p>\n<p>This document expands the characterization of products intended to manage tissue integrity ( <span class=\"std\"> <span class=\"std-ref\">ISO&nbsp;16840-2<\/span><\/span> ) and provides a standardized indenter for other wheelchair seating tests.<\/p>\n<p>It does not provide information specific to cushion performance for a particular individual user, nor is it intended to characterize envelopment or immersion under higher loading conditions, nor to assess the weight capacity of a cushion.<\/p>\n<p>This document includes a method that is specific to 220&nbsp;mm and 255&nbsp;mm indenters. Dimensions are provided for a 380&nbsp;mm indenter to allow for extension of the method to larger patient simulation.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>Introduction  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>4 Indenter construction <br \/> 4.1 Materials <br \/> 4.2 Tolerances and finishes <br \/> 4.3 Indenter elements <br \/> 4.3.1 Trochanter bar  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>4.3.2 Trochanter blocks  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>4.3.3 Semispherical indenter half  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>4.4 Indenter assembly  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>4.5 Sensor locations <br \/> 4.5.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>4.5.2 Elevation a <br \/> 4.5.3 Elevation b <br \/> 4.5.4 Elevation c <br \/> 4.5.5 Elevation d  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>5 Instrumentation hardware <br \/> 5.1 Sensors <br \/> 5.2 Timer <br \/> 5.3 Loading equipment <br \/> 5.4 Rigid board <br \/> 6 Preparation of test cushion <br \/> 6.1 Cushion set up  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>6.2 Preconditioning the cushion to the test environment <br \/> 7 Envelopment test method <br \/> 7.1 Rationale <br \/> 7.2 Method <br \/> 7.2.1 Setting the datum height for the indenter <br \/> 7.2.2 Pre-conditioning the cushion <br \/> 7.2.3 Seat cushion thickness measurement  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>7.2.4 Load application and data collection  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>7.3 Calculations <br \/> 7.3.1 Envelopment  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>7.3.2 Immersion <br \/> 8 Test report  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>Annex A (informative) Estimate of measurement uncertainty  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Wheelchair seating &#8211; Envelopment and immersion characterization of seat cushions using a dual semispherical indenter<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2021<\/td>\n<td>24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":385945,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[174,2641],"product_tag":[],"class_list":{"0":"post-385936","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-11-180-10","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\/385936","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\/385945"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=385936"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=385936"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=385936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}