4
Frequency weighting: A/C 
Time weighting:  FAST ( 125ms ), SLOW 
( 1s ) 
Microphone:   1/2 inch electret condenser 
microphone  
Display: 4  digits LCD display with a 
resolution of 0.1dB 
Display Update:  2 times/sec. 
MAX hold:      Hold the Maximum reading 
MIN hold:      Hold the Minimum reading 
HOLD:      Hold the readings 
Alarm function:  “OVER”is when input is 
more than upper limit of range. 
“UNDER”is when input is less than upper limit 
of range. 
Analog output  :  AC/DC outputs from 
earphone outlet 
AC=1Vrms  ,DC=10mV/dB 
Data output  :    USB data traffic   
Auto power off     :
  Meter automatically 
shuts down after approx. 15 minutes of 
inactivity.