AWA6228型多功能聲級(jí)計(jì)愛華AWA8782型攜帶包原理
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概述:采用數(shù)字真有效值檢波專利技術(shù)的數(shù)顯聲頻傳聲器放大器,包含A、C和Z頻率計(jì)權(quán)特性,符合GB3785.1標(biāo)準(zhǔn)對1級(jí)聲級(jí)計(jì)的要求。測量頻率范圍可延伸到40 kHz或80 kHz。通過前面板LEMO 7芯插座,可連接到傳聲器前置放大器和1/2英寸或1英寸測試電容傳聲器,組成1級(jí)聲級(jí)計(jì)用于聲學(xué)測量。還有直接輸入插孔,可連接到加速度計(jì)前置放大器,也可用作一般高靈敏度聲頻電子電壓表,測量真有效值(RMS)電壓。是一種用途廣泛的實(shí)驗(yàn)室用聲學(xué)、振動(dòng)、電壓測量儀器,可以代替進(jìn)口測量放大器作為聲學(xué)計(jì)量使用。
特點(diǎn):
1:動(dòng)態(tài)范圍大(110 dB),測量時(shí)不需更換量程;
2:精度高,穩(wěn)定性好,數(shù)字顯示電壓5位數(shù),聲壓級(jí)讀數(shù)至0.01 dB,不需另加數(shù)字電壓表提高讀數(shù)精度;
3:可以將某一測量值設(shè)置為參考0 dB,直接讀出其它測量值與它相比的增益或衰減dB數(shù);
主要性能指標(biāo)
執(zhí)行標(biāo)準(zhǔn):IEC 61672:2002 Class 1,GB/T 3785-2010 1級(jí)
頻率計(jì)權(quán):A,C,Z
時(shí)間計(jì)權(quán):16ms、F、S、8秒
量程:316mV,1V,3.16V,10V
窗函數(shù)(選配功能):矩形窗、漢寧窗、平頂窗、布萊克曼窗
參考量程:10V
參考量程級(jí)線性范圍:110dB
電壓測量范圍:15μV到10V
信號(hào)輸入:直接輸入(BNC插座),前置輸入(LEMO 7芯插座),
ICP前置輸入(BNC插座)
信號(hào)輸入阻抗:1MΩ
輸入保護(hù):±18V
恒流源供電:18V、2mA
信號(hào)輸出:交流輸出(BNC插座),直流輸出(BNC插座),RS-232C(DB9M插座)
內(nèi)部參考信號(hào):1kHz,50mV,失真小于1%。
內(nèi)部電池:免維護(hù)鉛酸充電電池,插入外接電源即開始充電。充滿電后可連續(xù)使用20小時(shí)以上。
外接電源:220V或110V,50Hz或60Hz
功耗:小于10W。
工作溫度:0℃~40℃
相對濕度: 20%~90%
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