{"id":33061,"date":"2024-10-17T04:06:31","date_gmt":"2024-10-17T04:06:31","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d257-2005\/"},"modified":"2024-10-24T14:36:54","modified_gmt":"2024-10-24T14:36:54","slug":"astm-d257-2005","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d257-2005\/","title":{"rendered":"ASTM-D257 2005"},"content":{"rendered":"<\/p>\n

1.1 These test methods cover direct-current procedures for the determination of dc insulation resistance, volume resistance, volume resistivity, surface resistance, and surface resistivity of electrical insulating materials, or the corresponding conductances and conductivities.<\/p>\n

1.2 These test methods are not suitable for use in measuring the electrical resistivity\/conductivity of moderately conductive materials. Use Test Method D 4496 to evaluate such materials.<\/p>\n

1.3 The test methods and procedures appear in the following sections:<\/p>\n

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see .<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nScope
Referenced Documents
Terminology <\/td>\n<\/tr>\n
2<\/td>\nSummary of Test Methods
Significance and Use <\/td>\n<\/tr>\n
3<\/td>\nElectrode Systems
FIG. 1
FIG. 2
FIG. 3 <\/td>\n<\/tr>\n
4<\/td>\nFIG. 4
FIG. 5 <\/td>\n<\/tr>\n
5<\/td>\nFIG. 6
FIG. 7 <\/td>\n<\/tr>\n
6<\/td>\nFIG. 7
TABLE 1 <\/td>\n<\/tr>\n
7<\/td>\nChoice of Apparatus and Test Method
FIG. 8
FIG. 9 <\/td>\n<\/tr>\n
8<\/td>\nTABLE 2 <\/td>\n<\/tr>\n
9<\/td>\nSampling
Test Specimens <\/td>\n<\/tr>\n
10<\/td>\nSpecimen Mounting
Conditioning
Procedure
Calculation
Report
Precision and Bias
Keywords <\/td>\n<\/tr>\n
11<\/td>\nX1. FACTORS AFFECTING INSULATION RESISTANCE OR CONDUCTANCE MEASUREMENTS
X1.1
X1.2
X1.3
X1.4 <\/td>\n<\/tr>\n
12<\/td>\nX1.5
X1.6
X1.7 <\/td>\n<\/tr>\n
13<\/td>\nX1.8
X1.9
FIG. X1.1 <\/td>\n<\/tr>\n
14<\/td>\nX2. EFFECTIVE AREA OF GUARDED ELECTRODE
X2.1
X2.2
FIG. X1.2
FIG. X1.3
FIG. X1.4 <\/td>\n<\/tr>\n
15<\/td>\nX3. TYPICAL MEASUREMENT METHODS
X3.1
X3.2 <\/td>\n<\/tr>\n
16<\/td>\nX3.3
X3.4
FIG. X3.1 <\/td>\n<\/tr>\n
17<\/td>\nX3.5
X3.6
X3.7
REFERENCES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

D257-99(2005) Standard Test Methods for DC Resistance or Conductance of Insulating Materials<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2005<\/td>\n18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":33062,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[476,2637],"product_tag":[],"class_list":{"0":"post-33061","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-035-01","7":"product_cat-astm","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\/33061","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\/33062"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=33061"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=33061"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=33061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}