Cirrus Research CR 151, Руководство пользователя

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optimus sound level meter user manual
Page 40
Acoustic Calibrator Information
This chapter refers to the use of a Cirrus Research plc CR:514 or CR:515 Acoustic
Calibrator.
Switching on the Calibrator
Press the Power Button on the end of the
Calibrator to switch the unit on. The
Indicator will illuminate to show that the
unit is operating. The calibrator will
automatically switch off after 5 minutes to
preserve battery power.
To switch off the calibrator manually, press
the power button again and the indicator will extinguish to show that the unit is
switched off.
Permanent-on Mode
For some applications there may be a need to have the calibrator switched on
continuously. To allow for this, the calibrator can be turned on by pressing and
holding the power button for three seconds. Release the button and the indicator will
flash to show that the unit is in permanent-on mode. Press the power button to switch
off the calibrator.
Calibrating a Sound Level Meter.
Push the microphone of the Sound Level Meter 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.