Larson Davis 831C-FFT, Справочное руководство

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SoundAdvisor Model 831C Choosing a Calibrator 50
5.2 Choosing a Calibrator
Acoustic Measurements
Larson Davis recommends the following calibrator for the 831C for acoustic measurements:
• Larson Davis Model CAL200: 94/114 dB @ 1 kHz.
TAKE NOTE
If using a 1/4-inch microphone, the 1/4-inch adapter (ADP024, or ADP109) is
required.
The following instances may require you to enter unique correction values in the
Calibration Settings tab as shown in 5.3 Reviewing the Calibration Settings .
• Using a free-field microphone: For details, see the calibration data shipped with
calibrator.
• The calibrator and instrument are at a temperature other than room temperature
(23° C) or not near sea level. For details, see the calibration data shipped with
calibrator.
• When you move the meter to another location (e.g. meter moved to or from 85 kPa
static pressure elevation). Recalibrate first, then enter values if needed.
Outdoor Measurement
When using the 426A12 Outdoor microphone and power supply or the Model 2100 outdoor
preamplifier, we recommend completing a calibration check using an electrostatic
actuator (E.A) as described in
5.3 Reviewing the Calibration Settings
When you perform a calibration using any preamplifier prelisted for the 831C, the
SoundAdvisor updates the saved calibration information for that preamplifier. If you install
a different preamplifier, the SoundAdvisor applies the previously saved calibration
information. As long as the same microphone is being used with that preamplifier, the
calibration is accurate.
Step 1
On your 831C, go to Tools
3

Calibrate .
Step 2
Choose an option from the
Select Calibrator
drop-down menu.
1.
The microphone type, sensitivity, and peak overload
values are available on this page
2.
The under range and noise floor capabilities.
1.
2.