1/12 octave + tolerance – NTi Audio XL2 Sound Level Meter User Manual

Page 99

Advertising
background image

99

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

.

Advertising