Model 90 Quantifier Sound Level Meter
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In this example, the measurement duration is set to 15 Minutes, and the instrument will run
continuously until the Stop key is pressed. The change the measurement duration, use the Up
and Down keys to select the require duration and press OK to select.
In addition to the preset measurement durations, the user can define the measurement duration
using the Set User Time Option.
Use the Up and Down keys to change the parameter and the Left and Right keys to move
through the different settings. Press OK to accept the User Time.
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 15 minutes, the MODEL 90 instrument will take a total of 15 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.
