1、summary：

   
 JH1-HS6288D type multifunctional noise analyzer is researched on the base
of HS6288A type multifunctional noise analyzer, the leading product of our factory.It consists of mainframe (sound meter)and printer,which has traits
of automatic distance,large LCD,poor light display,clock setting,automatic measure store of equivalent continuous sound and statistics sound,and the printer will automatically print various measure results.Through RS-232C

interface,the mainframe and microcomputer can both realize communication and output the measure result and finally print them.Performance of this apparatus accords with requirement of standard of IEC651 and GB3785
on Ⅱ type sound meter.
　　JH1-HS6288D type multifunctional noise analyzer is easy to manipulate and convenient to use with strong reliability,it is widely applicable for requirement of noise measure analysis of environmental protection, factory,school and scientific research academy .

2、Technical index：

　　1、microphone: 1/2＂ electret test capacitance microphone（HS14423）
　　　　frequency: 20Hz~12.5KHz
　　　　sensitivity:about 25Mv/Pa
　　2、measure range: (consult 2×10ˉ5Pa)
　　　A sound: 35～130dB
　　　C sound: 40dB～130dB
　　3、frequency calculation
　　　A calculation: 31.5～8KHZ
　　　C calculation: 31.5～8KHZ
　　4、cymoscope trait:
　　　ＬＭＳ real virtual value
　　　factor of peak value:3
　　5、trait of time calculation:F(fast),S(slow),maximum keep.
　　6、function of automatic measure
　　　　Leq、L5、L10、L50、L90、L95、LMAX 、ＳＤ、ＬD、Ln、 Ldn,etc