Larson Davis System 824, Reference Manual

Page: 72 / 536

3-22 824 Reference Manual 11/8/00
Calibration
To calibrate the System 824, or to view previous calibration
information, use the
u
or
d
key to select Calibration
from the Tools menu, then press the
c
key. The following
screen appears:
The Calibration display shows the date and time of the last
calibration change and the offset being used to calibrate the
levels. It also shows the date and time of the last calibration
check and the level detected during that check.
To utilize the calibration tool or modify the Calibration set-
tings, use the
u
or
d
key to select Calibration from the
Tools menu, then press the
r
key. The Calibration menu
provides the following settings:
Check - Activates the calibration check (level verification)
process.
Change - Activates the calibration change (adjust) process.
Cal Level - Enables the user to enter the sound pressure
level generated by the calibrator.
Calibrator S/N - Enables the user to record the serial num-
ber of the calibrator (for reference).
Noise Floor - Enables the user to enter a noise floor value.
Optimum values will depend on the type of measurement
being performed (see appendix D).
Date and time of the last calibration change
Offset currently in use to calibrate the levels
Date and time of the last calibration
The level detected during the last check