1747-L532
1747-L532
(1)毫伏表應(yīng)垂直放置,不要水平放置。通電前應(yīng)調(diào)整表頭的機械零點螺絲釘,使表針指示在零位(注,機械零點不需經(jīng)常調(diào)整)。(2)根據(jù)被側(cè)信號值的大小選擇電壓程,若不知被測信號大小.可先選zui大量程,逐步減小到合適的量程。(3)接通電源,待表針穩(wěn)定后,將輸人線短路,調(diào)整調(diào)零點調(diào)整旋鈕。使表針指在零位,即可進行測量。(4)測量時先將輸入線的地線(屏蔽線)與被測電路公共點相連,然后將輸入線的非地端接至被側(cè)點上,測量完畢,先將非地端拆下。然后斷開地線。(5)當用此表當作電平表用時,實際的電平數(shù)值為表針所指的dB數(shù)與選擇量程開關(guān)所指的電平分貝數(shù)的代數(shù)和。
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