6
6. Operation Instruction
(1) Power ON/OFF: Turn the meter on by pressing the
"
" button for 1 second. To turn the meter off, press and
hold the "
" button for approx. 3 seconds then release the
button.
(2) Backlight:
After turning the meter on, momentarily press the "
" key,
the backlight will turn on/off. It will automatically turn off after
approx. 30 seconds of inactivity.
(3) Frequency weighting A/C selection:
Press "
" key to select A or C.
dBA: “A“ frequency weighting (designed to reflect the
response of the human ear to noise which is most sensitive
between 500Hz and 6000Hz)
dBC: “C” frequency weighting (commonly used to measure
peak sound pressure levels)