Galaxy Audio CHECK MATE CM-130 - Manual (Page 9)

SOUND LEVEL METER
7
VI . Measurement Preparation
(1) Battery Loading
Remove the battery cover on the back and install one
9V Battery.
(2) Battery Replacement
When the battery voltage drops below that required for
reliable operation, the low battery symbol will
appear, indicating it is time to replace the battery.
VII. Operating Precautions
(1) Calibrate the instrument before operation if the instrument
has not been used for a long period of time.
(2) Do not store or operate the instrument in high temperature
and high humidity environments.
(3) Keep the microphone dry and avoid severe vibration.
(4) Remove the battery from the instrument, and store in a
low humidity environment when not in use.
VIII. Measurement
(1) Open the battery cover and install a 9V battery in the
battery compartment.
(2) Turn power ON and select the desired response time
and weighting. If the sound source consists of short
bursts, or the meter is only catching sound peaks, set
response to FAST. To measure average sound levels,
use the SLOW setting.
Select A-weighting for general noise sound level and
C-weighting for measuring sounds with high low
frequency content.
(3) Select desired level.