User manual

39
Sound Level Meter
Data Post-Processing
The XL2 stores all data and audio onto the SD card for direct
transfer to a computer. Audio data is stored as .wav files. Data
reports and log files are stored in plain text format, which can
be opened with any text editor (Notepad, Wordpad, etc.). The
data is tab-delimited, so dropping the .txt file into a spreadsheet
application will conveniently show the results in columns.
Furthermore a series of free MS Excel application templates pro-
vide a convenient way to view the measurement results of specific
tasks and create simple reports. They are available as free down-
load for all registered XL2 customers on the support website at
https://my.nti-audio.com. (Enable all macros when opening the
document.)
For the most comprehensive analysis of logged noise monitor-
ing data, use the XL2 Data Explorer software. The data import
into the software is enabled by the Data Explorer Option, which
needs to be installed in the XL2 Sound Level Meter. More de-
tails in chapter XL2 Data Explorer.
RTA Measurement - Getting Started
Test Preparations
The XL2 reads the electronic data sheet of any connected
ASD microphones provided by NTi Audio and switches the 48V
phantom power automatically on as follows:
Connect the measurement microphone to the XL2.•
Switch on the XL2 •
.
 The 48V phantom power indication in the upper menu bar
changes to ASD. The XL2 is ready for acoustic measure-
ments.
Position the XL2 at the measurement location using a micro-•
phone stand or tripod.
Select the • SLMeter function in the measurement menu and
toggle with page
to the real-time analyzer (RTA) page
.
All wideband and RTA levels are measured and
logged simultaneously. You select the sound
levels to be displayed.