英语翻译A theoretical study to compare the sensitivity standards

英语翻译
A theoretical study to compare the sensitivity standards for smoke detectors [8] was completed.The study compared four standards:Draft ISO/DIS 12239 [7],BS 5446:Part 1 [1],UL 217 [5] and the proposed revision of BS 5446:Part 1 [4] to decide whether the proposed revision of BS 5446 could be accepted in place of the existing BS 5446.The study also reviewed the similarities between the fire test specifications for the existing and revised BS 5446 and also the existing European standard for commercial detectors (EN 54).The study concluded that BS 5445 and BS 5446 (revised) had effectively the same requirements on fire sensitivity.Furthermore,it appeared that BS 5446 (original) required a greater fire sensitivity when compared to BS 5446 (revised).It further concluded that BS 5446 (original) and BS 5446 (revised) could not be directly compared as they used different sets of fire tests and different pass/fail parameters.
The fire tests were selected so as to closely match the fire sensitivity specified in BS 5445 :Part 9 :1984 [2] (TF 2-5) or the draft ISO standard [7] (TF 7).In addition,two non-standard tests were conducted as representative of realistic fire scenarios that occur in dwellings (Table 1).The fire tests that matched the sensitivity tests are referred to as the ‘standard’ tests and the two realistic fires are referred to as the ‘ad-hoc’ tests.The downstairs dining room (at the rear) and the upstairs bathroom were both sealed.The doors to the other two first floor bedrooms were kept closed for all of the tests.The kitchen door was closed for all tests apart from Test 10.The fire tests were terminated once all detectors had gone into alarm or when it was considered that no more detectors would raise an alarm.