Frequency
Weighting
Network
Characteristics of A & C.
A weighting:
Th
is
characteristic is
simulating
t
he
"Human
Ear List
en
ing" response. Typical
ly
,
when
making
ambient or
environmental sound
level measurement
s
, always select A
weighting.
C weighting
:
Th
is
characteristic is near the "FLAT"
response. Typical
ly
, it is suitable for
checking the noise of machinery (Q.C.
check) & knowing the sound pressure level
of the tested equipment.
Time
Fast - t = 125 ms
weighting
* "Fast" range is simulat
ing
the human ear
(Fast & Slow)
response time weighting.
Slow - t = 1 s
* "Slow" range is easy to get the average
values of vibration sound level.
Data hold
To freeze the measurement value.
Function selector
SPL
Auto range
：
35
～
130dB.
DOSE
Threshold Level(Thr)
：
70
～
90dB in 1dB steps.
Criterion Level(Crit)
：
80
、
84
、
85
、
90dB.
Exchange Rate
：
3, 4, 5 or 6 dB
Frequency
31.5 to 8,000 Hz.
Microphone
Electr
et
condenser microphone.
type
Microphone
2.7 mm (1/2 inch).
diameter
3
