Center 2250, Инструкция по эксплуатации, Страница: 9 / 16

7
SOUND LEVEL METER
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MAX / MIN hold switch
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.
Sampling rate: 160ms

Level range control switch
Each time the UP switch
V
is pressed. The level range
increments from “ Lo ” Level to “ Hi “ Level range.
Each time the DOWN switch
W
is pressed. The range
decreases from “ Hi ” Level to “ Lo “ Level range.
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Frequency Weighting select switch
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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Time weighting select Switch.
FAST : for normal measurements