3
E. Name and fuctions
1) Electret condenser microphone
2) LCD display.
3) Power switch
4) Level range control switch:
30dB~80dB, 50dB~100dB
60dB~110dB, 80dB~130dB
5) Maximum value hold switch (MAX)
6) Frequency weighting select switch.
A: A weighting for general sound level measurements
C: C weighting for checking the low frequency content of noise.
7) Time weighting select switch.
Fast: For normal measurements.
Slow; for checking average level of fluctuating noise.
8) AC output terminal: 0.707Vrms corresponding to each range step.
9) DC out put terminal: output 10mV/dB
10) Calibration control
11) External DC 9V power supply terminal.
12) Battery Door.
13) Tripod mounting screw.
14) Windscreen
F. LCD Display description:
1) Level range
2) Instantaneous sound pressure level
3) Low battery Mark.
4) Maximum value is held during measuring.
5) Measuring value
6) Measuring Unit
7) Frequency weighting A/C
8) level range bar graph
9) Range over
10) slow time weighting
11) fast time weighting
12) Range under
