Cirrus Research CR 151, Руководство пользователя

Страница: 13 / 47

optimus sound level meter user manual
Page 13
The instrument is switched on by pressing and releasing the power button on the left
hand side of the case. After the boot screen, your
optimus will display the last View
you used.
Calibration
All noise measuring instruments should be calibrated before each use, because the
microphone is susceptible to minor damage from even small knocks.
The calibration applies corrections (if needed) to ensure that your measurements are
as accurate as possible.
Calibration should also be carried out at the end of a measurement session to make
sure that nothing has happened to the instrument during the session.
To calibrate your optimus , carefully push the microphone into the cavity at the end of
the calibrator. Ensure the microphone is fully inserted into the cavity and is past the ‘O’
ring seals.
Ensure that the small bleed hole next to the microphone cavity on the calibrator is not
blocked, as this could cause damage to the microphone.