
4
Basic usage methods
1. Press the power switch, the default measurement is auto
range microprocessor of LCD display is 30~130 dB. And the
measured onsite sound level will display within this range. If
one of the “UNDER” or “OVER” icons displays on the LCD, it
means that onsite sound is either lower or higher than the limit
range. At this time, the measurement value is not accurate,
you should click Up and Down key to set the measurement
gear level of the instrument to get accurate measurement
value.
2. Setting measurement gear level:
Press the Level▲ or ▼ keys to select appropriate gear level
to measure the current sound level, when the “UNDER”
character appears, it means that the gear level of the
instrument is too high. You should press Level▼ to set a lower
gear level until the “UNDER” character disappears. When the
“OVER” character appears, it means that the gear level of the
instrument is too low. You should press Level▲ to set a lower
gear level until the “OVER” character disappears.
3. Selecting the weighting mode:
To measure the sound level within the human audible range,
select A weighting mode (simulate the hearing characteristics
of human ears) mode, press the A/C key, click to select A,
click again C. To measure the actual sound level, select C
weighting mode.
4. To read real-time sound level, select FAST (high speed). To
obtain the average sound level, select SLOW (low speed).
Press FAST/SLOW key to select FAST or SLOW.
5. To obtain the maximum sound level, press “MAX” function key
and you can read the maximum sound level reading value,
press MAX key again to return to the normal measurement
mode.
6. To light up the backlight of LCD when measuring at night,
press key.
Notes
1. Do not use the meter in hot, humid environment.
2. If the meter is not to be used for a long time, remove the
batteries to avoid electrolyte leakage damaging the
instrument.