SOUND LEVEL METER
5
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4
MAX / MIN hold button
Press button to enter the maximum and minimum recording mode.
Select the proper Level range before using MAX/MIN to ensure that reading
value will not exceed the measurement range. Press once to select MAX
value. Press again to select MIN value, and press again to select current
value with “ MAX MIN “ annunciator blinking.
Press and hold down button for 2 seconds to exit the MAX MIN mode.
Note:
If change sound level range or change A-C weight, the MAX.MIN
mode will clear.
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5
Level range control switch
Each time the UP button V is pressed. The level range increments from
“ Lo ” Level to “ Hi “ Level range and to “Auto” Level range.
Each time the DOWN button W is pressed. The range decreases from
“Auto” Level range to “ Hi ” Level and to “ Lo “ Level range.
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6
Frequency Weighting select button
A : A - Weighting. for general sound level measurements.
C : C - Weighting. for checking the low-frequency content of noise.
( If the C-Weighted level is much higher than the A-weighted level, then
there is a large amount of low-frequency noise )
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7
Time weighting select button
FAST : for normal measurements
SLOW : for checking average level of fluctuating noise.
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8
Microphone
1/2 inch Electret Condenser microphone
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9
CAL potentiometer
Calibration control , For level calibration adjustment.
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10
RS-232 Interface:
The RS-232 signal output is a 9600 bps N 8 1 serial interface.
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