Model 90 Quantifier Sound Level Meter
Page 20
Measurement Mode
Key Press
Display
Comments
The current measurement mode is
shown on the screen.
In this example, the measurement
mode is Broadband.
Measurement Duration
Key Press
Display
Comments
The measurement duration is
shown at the bottom of the
screen.
In this example, the measurement
time is 30 minutes.
When the instrument is set to either 1:1 or 1:3 Octave Band Mode, the Run Duration is
divided between the frequency bands. For example, if the measurement duration is set
to 30 minutes, the MODEL 90 instrument will take a total of 30 minutes to complete
the sweep through the frequency bands.
To meet the accuracy required by the standards to which the instrument is designed to
meet, there is a minimum time required to measure each frequency band. Therefore,
the MODEL 90 enforces a minimum measurement duration of 1 minute for the 1:1
Octave Band Mode and 3 minutes for the 1:3 Octave Band Mode.
