Sound Level Calibration
5
6. Operating Preparation
(1) Remove battery cover and install a 9V Battery in
the battery compartment.
(2) To quickly check the operation of the sound level
calibrator.
Proceed as follows:
(a) Turn the power switch from OFF to the 94dB
position. The user can start to operate it when
LED indicates a green light. If there is no light,
please replace the battery.
(b)Change the switch from 94dB to 114dB, the dB
level will increase by 20. You can calibrate in noisy
environments and check linearity.
7. Calibration Procedure
(1) The cavity of the calibrator will accommodate 1-inch
microphone.
(2) When the calibration is performed to an
instrument with 1/2-inch microphone, the 1/2-inch
microphone adaptor will have to be inserted by
gently pushing it into the cavity till the end.
(3) Place the sound level calibrator over the
microphone of the sound measuring instrument
ANSI S1.40 - 1984
IEC 60942 Class 2
114dB
94dB
OFF
Lo =
30
80 dB
Med= Hi =
POWER-UP OPTIONS
Auto=
100 dB 130 dB
130 dB
50 80
30
MAX
CLOCK
REC
MIN
LEVEL
SLOW
INTV
FAST
SETUP
C
A
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