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2
HD 2020
Acoustic calibrator
1.
ON-OFF
key: turns on and off the instrument. When you turn the instrument on, the display will switch
on about two seconds later.
2.
SETUP
key: allows you to enter and scroll menu. To exit, press it repeatedly until you go back to the
standard screen.
3.
Display. When you turn the instrument on, it shows all segments on, then the sound pressure level (94
or 114dB) will appear in standard view.
4.
Calibrator cavity for 1/2 inch microphones.
5.
key: in standard mode, it selects 94dB and 114dB pressure levels alternately. In menu mode, it de-
creases the current value.
6.
key : in standard mode, it selects 94dB and 114dB pressure levels alternately. In menu mode, it in-
creases the current value.
7.
Battery lid.
