DVM1356 SOUND LEVEL CALIBRATOR
5
PREPARING FOR OPERATION
(1) Remove battery cover and install a 9-Volt battery in the battery
compartment.
(2) To quickly check the operation of the Sound level Calibrator
before using it, proceed as follows :
(a) Turn the power switch from OFF to the 94dB position and
listen for a 1000Hz audible tone. This indicates that the
instrument is working. If no tone is evident, the battery may
need replacing.
(b) Change the switch from 94dB to 114dB, the 20dB increase in
level of the 1000Hz tone should be easy to hear.
CALIBRATION OF SOUND-MEASURING
INSTRUMENTS
(1) The cavity of the calibrator will accommodate a 1-inch
microphone.
(2) When the calibration is performed on an instrument with a 1/2-
inch microphone, the 1/2-inch microphone adapter will have to be
inserted by gently pushing it completely into the cavity.
(3) When calibration is performed on the instrument with a 1/4-inch
microphone, remove the 1/2-inch microphone adapter. The 1/4-
inch microphone adapter has to be inserted for the transducer
assembly of calibrator.
(4) Insert the proper adapter, if one is required, in the cavity of the
Sound-level calibrator to fit the particular microphone under
calibration.
(5) Set the Sound-level calibrator power switch to the 94dB or 114dB
position, depending on the desired level of calibration. (Select the
level closest to the upper limit of the level range intended for
measurement.)
