DMS-4400
4
a. Low battery indicator
b. DATA HOLD
indicator
c. Maximum indicator
d. Minimum indicator
e. A-Weighting
f. C-Weighting
g. Slow response
h. Fast response
i. Sound level read out
2. Display
3. DATA HOLD button
Readings shown on the LCD can be locked while
pressing this button.
4. 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).
5. Time weighting select button
FAST: for normal measurements.
SLOW: for checking average level of fluctuation
noise.
a
b
c
d e
f
h g
i
