When the battery voltage drops below the operating
voltage, mark “
” appears and flashes. It must bedone to replace all batteries with new one.
When the DC adapter is used, insert the plug of the adapter into the DC 9V connector on the side
panel.
Ⅵ
.
The method of usage
1.
Press the power switch, LCD displays the default
range(40~90dB). and displays the sound level of a spot. If the display appears “UNDER” or “OVER”
symbol, it indicates the sound level less than or more than 40~90dB, measurement is invalid. you need
to set the meter’s range to a correct position.
2.
Set range:
Press
LEVEL ▲ or ▼, choosethe proper range,
measure the sound level of the spot. When LCD appears “UNDER” symbol, it indicates that the range
is high, you need to press LEVEL▼ to set lower range until no “UNDER” symbol. When LCD
appears “OVER” symbol, it indicates that the range is low, you need to press LEVEL▲ to set higher
range until no “OVER” symbol.
3.
Choose weighting mode:
when you measure a general noise sound level, you could choose ‘A’ weighting bypressing A⁄C
button. To measure a acoustic sound level , choose “C”.
4.
When you want to get a real-time sound level, choose FAST by pressing FAST⁄SLOW button. To
get average sound level, choose “SLOW”.
5.
When you want to get the maximum value of a sound level, you can press “MAX” button.
6.
When you want to measure in the night, you can open the background light by pressing “LIGHT”
button.
