NTi Audio XL2 Sound Level Meter - Manual (Page 99)

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1/12 Octave + Tolerance
5 Input Range
The XL2 Analyzer provides three input ranges to accom-
modate the wide range of input signals. The individual rang-
es are based on the microphone sensitivity setting in the
calibration menu of the XL2. For example at a sensitivity
S=20mV/Pa the input ranges are
Lower range: 10 - 110 dBSPL •
Middle range: 30 - 130 dBSPL •
Upper range: 50 - 150 dBSPL •
Select the lowest possible input range according to the
maximum level expected during the measurement; e.g., if
the sound pressure will be always below 110 dBSPL, then
select the lowest input range 10 - 110 dBSPL.
6 Time Weighting
Offers selectable time weighting of 0.1, 0.2, 0.5, 1.0 second
as well FAST (125 ms) and SLOW (1 second). Applications:
Short Time
Weighting High resolution in time with minimum
averaging
Long Time
Weighting Low resolution in time with longer aver-
aging
7 Run Indication
The run indication shows the measurement status running,
paused or stopped. Various measurement settings are
locked during ongoing measurements, such as changing
the input ranging or the preset measurement time.
For passed/failed measurements with the Spectral Limits
option the run indication may display A for a preset auto-
mated level trigger.
8 Actual Measurement Time
Counts actual measurement time in hrs:min:sec. Supports
setting of time modes: continuous and single.
Timer Mode Continuous
(applicable for standard measurements)
All values are recorded and monitored continu-
ously after starting a measurement with start
.
The actual measurement time is shown.
Timer Mode Single
Automatically stops the measurement after the
pre-set measurement time.
Set the required measurement time. •
Start the measurement • .