a. Sound Level Meter      

▪ Microphone       : Prepolarised electret Condenser            

▪ Sensitivity  : 20 mV/Pa

▪ Standard       : IEC 61672-1 Class2              

    IEC 60651 Class 2 / IEC 60804 Class 2

▪ Parameters       : LA and L Aeq

▪ Other parameters : LAFmax, LAFmin, LASmax, LASmin

▪ Frequency weighting : A  

▪ Measuring range   : 30 - 130 dB

▪ Time waighting   : Slow , Fast

▪ Data integration time for LAeq : From 1s to 15 min

▪ Overload indicator : Detected at the peak SPL

▪ Backlighted display : Graphic 128 x 64 pixels

▪ Resolution   : 0,1 dB

▪ Reference direction : Microphone axis

▪ Reference range     : 30 to 130 dB                  

▪ Reference level     : 94 dB

▪ Reference frequency : 1000 Hz

 ▪ Power supply     : 3 AAA batteries                  

b. Automatic Check      

▪ Acoustic Signal   : 90 dB to 1000Hz

▪ Frequency       : 1000 Hz ± 5%

▪ Level         : 90 dB ± 1dB

▪ Stability         : <0,5 dB

▪ Automatic power supply : When being connected to the unit

▪ Dimensions       : 140 x 28 x 25 mm (without cable)

▪ Weight         : 50 g