Lutron Electronics SL-4023SD Operation Manual page 5

Frequency
Weighting
Network
Time
weighting
(Fast & Slow)
Data hold
Peak hold
Range selector
Frequency
Microphone
type
Microphone
size
Characteristics of A & C.
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.
Fast - t= 200 ms
* "Fast" range is simulated the human ear
response time weighting.
Slow - t = 500 ms
* "Slow" range is easy to get the average
values of vibration sound level.
To freeze the measurement value.
To keep the peak ( max. ) measurement
value.
Auto range :
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.
31.5 to 8,000 Hz.
Electric condenser microphone.
Out size, 12.7 mm DIA. ( 1/2 inch).
3
30 to 130 dB.