BS EN 352-8:2020 pdf free.Hearing protectors一Safety requirements Entertainment audio earmuffs. BS EN 352-8 This document is applicable to entertainment audio earmuffs. It specifies requirements on construction,design, performance, marking and user information relating to the inclusion of the entertainment audio facility. Entertainment audio earmuffs use a wired or wireless system through which audio entertainment can be relayed. They may incorporate a...
BS EN 13850:2020 pdf free
BS EN 13850:2020 pdf free.Postal services一Quality of services - Measurement of the transit time of end-to-end services for single piece priority mail and first class mail. BS EN 13850 This document specifes methods for measuring the end-to-end transit time of domestic and cross-border Single Piece Priority Mail (SPPM), collected, processed and delivered by postal service operators. It considers methods using...
BS IEC 63068-3:2020 pdf free
BS IEC 63068-3:2020 pdf free.Semiconductor devices - Non-destructive recognition criteria of defects in silicon carbide homoepitaxial wafer for power devices Test method for defects using photoluminescence. BS IEC 63068-3 Defects with characteristic PL features shall be evaluated by PL method. The following descriptions concern such defects in n/n+-type 4H-SiC homoepitaxial wafers with an off-cut angle of 4° along the direction...
BS 14100:2020 pdf free
BS 14100:2020 pdf free.Control of hazardous energy on machinery - Specification. BS 14100 One of the aims of an intervention risk assessment is to decide, in advance of any work activity, whether it is acceptable to rely on machine interlocking to prevent unexpected start-up of the machine, or whether a secure isolation is required for each activity. Maintenance activities that...
BS ISO 4360:2020 pdf free
BS ISO 4360:2020 pdf free.Hydrometry一Open channel flow measurement using triangular profile weirs. BS ISO 4360 This document specifies methods for the measurement of the flow of water in open channels under steady flow conditions using triangular profile weirs. The flow conditions considered are steady flows which are uniquely dependent on the upstream head and non-modular (drowned) flows which depend on...
BS ISO 4548-5:2020 pdf free
BS ISO 4548-5:2020 pdf free.Methods of test for full-flow lubricating oil filters for internal combustion engines Test for cold start simulation and hydraulic pulse durability. BS ISO 4548-5 Filters are subjected in service to pressure fluctuations caused by either engine cold starting conditions or hydraulic pulse events during normal operation. The test specified in Clause 8 can be performed at...
BS ISO 7870-3:2020 pdf free
BS ISO 7870-3:2020 pdf free.Control charts Acceptance control charts. BS ISO 7870-3 This document gives guidance on the uses of acceptance control charts and establishes general procedures for determining sample sizes, action limits and decision criteria. An acceptance control chart should be used only when: a) the within subgroup variation is in-control and the variation is estimated efficiently;b) a high...
BS ISO 20360:2020 pdf free
BS ISO 20360:2020 pdf free.Brown coals and lignites一Determination of the volatile matter in the analysis sample: one furnace method. BS ISO 20360 Furnace, heated by electricity, in which a zone of uniform temperature of 900 °C土5 °C can be maintained (see Figure 1, which is the same as the one given in ISO 562:2010 Figure 1).It may be of the...
BS ISO 3529-2:2020 pdf free
BS ISO 3529-2:2020 pdf free.Vacuum technology一- Vocabulary Vacuum pumps and related terms. BS ISO 3529-2 This document gives definitions of vacuum pumps and related terms. It is a continuation of ISO 3529-I which defines general terms used in vacuum technology.2 Normative references ISO 3529-1:2019, Vacum technology一Vocabulary 一Part 1: General terms ISO 21360-1:2012, Vacum technology一Standard methods for measuring vacuwm-pump performance一Part 1:...
BS ISO 13041-1:2020 pdf free
BS ISO 13041-1:2020 pdf free.Test conditions for numerically controlled turning machines and turning centres Geometric tests for machines with horizontal workholding spindle(s). BS ISO 13041-1 This document specifies, with reference to ISO 230-1, the geometric tests on normal accuracy numrically controlled (NC) turning machines and turning centres with horizontal work spindles as defined in 3.1 and 3.2. It also specifies...