9
f [Hz]
16000 17000 18000 19000 20000
dL [dB]
-2.90
-2.98
-2.89
-3.46
-3.48
U [dB]
≤
0.11
-4,0
-3,5
-3,0
-2,5
-2,0
-1,5
-1,0
-0,5
0,0
0,5
1,0
100
1000
10000
100000
f[Hz]
dL[dB]
Fig. 1.5. Influence of OP60/4 windscreen.
2. CONTROLLING OF THE INSTRUMENT
DLM-102 sound level meter can be controlled by instrument keyboard.
2.1. Control keys
Instrument keyboard contains following keys:
•
power switch:
•
keys used to select the instrument settings (they also serve as cursors):
•
keys used to control memory and calibration:
•
keys: START/STOP of measurement and ENTER
2.2. Input and output connectors of the instrument
Instrument is equipped with:
