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= 200 ms
weighting * "Fast" range is simulated the human ear
(Fast & Slow) response time weighting.
Slow - t = 500 ms
* "Slow" range is easy to get the average
values of vibration sound level.
Data hold To freeze the measurement value.
Peak hold To keep the peak ( max. ) measurement
value.
Range selector
Auto range :
30 to 130 dB.
Manual range :
3 range, 30 to 80 dB, 50 to 100 dB,
80 to 130 dB, 50 dB on each step,
with over & under range indicating.
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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