Fluke ii900 - System Settings and Configuration; Acoustics and Spectrum Settings

Acoustic Imager
Menus
13
Acoustics
The Acoustics menu shows all the available settings for
adjustment.
Show dB Scale: On or Off
You can choose to show or hide the dB scale. Turn off the dB
scale to see a larger visual area on the display.
Min / Max dB
The minimum/maximum decibel (dB) settings determine the sound
level (intensity) that shows on the SoundMap. Decibel level
thresholds help you to visualize leaks in challenging conditions, for
example, very small leaks or a lot of background noise in the same
frequency range as a leak. For more information, see Profiles.
Auto: Automatically adjusts the Color Palette Scale to the
minimum/maximum decibel value for the received sound pressure.
Manual: The Color Palette Scale is a user-defined minimum/
maximum decibel value. Levels above the maximum value show
on the display with the same color as the maximum value. Levels
below the minimum value do not show on the display.
When Manual is selected, use the +/- to adjust. Or, tap on the
dB SPL scale and use the slider to manually adjust the minimum
and maximum in decibel values of the Color Palette Scale.
High Frequency (ii910)
Toggle between the standard frequency range up to 52 kHz and
the expanded frequency range up to 100 kHz.
Single Source/Multiple Sources
The Single Source mode shows less noise and reflection on the
display. Smaller leaks or partial discharges do not show when they
are close together with larger leaks or PD in the same field of view.
The Multiple Sources mode will not mask smaller leaks or partial
discharges when they are in presence of larger leaks or PD. When
in Multiple Sources mode, several markers show on the display to
indicate the peak dB level of any detected source of sound.
Note
The central marker does not show on the display in the
Multiple Sources mode.
Profiles
Profiles allow you to reuse the manual settings such as Frequency
band, Max dB scale and Min dB scale, and Palette.
On: A preset profile is active. The icon in the center bottom of the
display allows you to select a profile or save the current settings as
a profile.
Off: Turn off the preset profile.
Note
When you turn on and turn off the Imager, the settings
for Frequency Band, Max dB, Min dB, and Palette
reset to the values in the selected profile, not the
current settings when the unit is turned off. If no profile
is selected when the Imager is turned off, the Imager
uses the factory-default profile.