3M AcoustiCal AC-300 User Manual - Acoustical
/ AcoustiCal
AcoustiCal User Manual
1
AcoustiCal
Models
The 3M
TM
AcoustiCal AC-300 is an acoustic calibrator for
calibrating precision Class/Type 1 as well as general
purpose Class/Type 2 sound level meters and noise
dosimeters.
The AC-300 produces two signals either 250 Hz or 1000
Hz at a sound pressure level of 114.0 dB.
Note:
The sound pressure level and combinations of frequency outputs
conform to the requirements of the IEC standard 60942: 2003-1 sound
calibrators using all microphones listed (see “Supported microphones and
adapters”).
AcoustiCal display indicators
One of the following indicators may appear in the upper-left corner of the display
when the calibrator is powered on.
Low Battery indicator:
If the low battery indicator is on,
the battery should be
replaced.
Fault indicator:
If the fault indicator is on, the level is incorrect. This may be
due to the microphone not being inserted properly.
Powering and settings
1.
Press the key to power on the calibrator.
Figure 1: Operating the calibrator
2.
Press the key to select 1000 Hz or 250 Hz at 114.0 dB.
3.
Press and hold the key until the calibrator powers off.
Note:
The AcoustiCal will automatically power off after 4 minutes from the
last key press.
Press
to power on. Press again to change
frequency. Press and hold to power off.
Display