Frequency Characteristics of A & C.
Weighting
Network A weighting :
The characteristic is simulated as "Human
Ear Listing" response. Typical, if making
the environmental sound level
measurement, always select to A
weighting.
C weighting
The characteristic is near the "FLAT"
response. Typical, 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 simulated 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：30～130dB.
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 Electric condenser microphone.
type
Microphone Out size, 12.7 mm DIA. ( 1/2 inch).
size
3
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