20
Note :
a. The characteristic table of A, C weighting, please
ref. page 24.
b. The characteristic of A weighting is simulated as
the " Human Ear Listening " response.
Typically always select the A weighting when makes
environmental sound level measurement.
c. The C weighting characteristic is near the " FLAT "
response. Typically it is suitable for checking the
noise of machinery ( Q.C. check ) & knowing the
real sound level of the tested equipment.
8. POWER SUPPLY from DC ADAPTER
The meter also can supply the power supply from the
DC 9V Power Adapter ( optional ). Insert the plug of
Power Adapter into " DC 9V Power Adapter Input Socket "
( 3-10, Fig. 1 ). The meter will permanent power ON
when use the DC ADAPTER power supply ( The power
Button function is disable ).
9. SYSTEM RESET
If the meter happen the troubles such as :
CPU system is hold ( for example, the key button can
not be operated... ).
Then make the system RESET will fix the problem.
The system RESET procedures will be either following
method :
During the power on, use a pin to press the " Reset
Button " ( 3-13, Fig. 1 ) once a while will reset the
circuit system.
