Norsonic nor1251, Пользовательская документация

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Vital parts of the Sound Calibrator Nor-1251…
Adaptor to facilitate the calibration of half-inch cartridges in addition to full-
inch is included, while adaptors for other sizes must be ordered separately
A green LED illuminates when the sound
pressure level inside the coupler cavity
is correct.
The power button. Depress to start gen-
erating the sound pressure level. The
sound calibrator switches itself off auto-
matically if the required sound pressure
level cannot be established, for example
if the microphone to be checked has not
been inserted.
The unit also switches itself off after ap-
proximately five minutes.
Miniature loudspeaker generat-
ing the sound pressure level
inside the coupler.
Silicone microphone monitoring
the sound pressure level inside
the coupler. One side of the mi-
crophone diaphragm is ex-
posed to the sound pressure
inside the coupler while the rear
side of the diaphragm is located
in a separate vented cavity to
prevent pick-up of extaneous
noise signals.
The cord is attached to the bat-
tery connector and the bottom
lid. Remove the lid and pull the
cord to get the battery out.
Frequency adjust-
ment potentiometer
(do not adjust unless
you know what you
are doing!)
Level adjustment
potentiometer (do
not adjust unless
you know what you
are doing!)
Potentiometer for level adjustment
Potentiometer for frequency adjustment