Xmic
24/01/05
MAN-095-0001 Revision B
© Palmer Environmental Ltd 2005
Page 16
MLP Mode Screens
Once filters have been selected go to the MLP (
M
inimum
L
evel
P
rofiling) screen by
pressing the Mode Select button, to carry out a leak noise comparison.
Each time this button is pressed momentarily the leak noise aquired in the previous
three seconds is recorded and displayed as a vertical bar on a histogram. In the
example above, eight consecutive readings have been taken by stepping the ground
microphone along the length of the pipe and pressing the sample button at each
position.
Press the Mode Select button to display the
MLP screen.
The frequency spectrum indicator bar
shows the filter bandwidth setting
To record the leak noise sound (graphically)
at different positions, press here.
Each time a sample is taken, a relative
number appears on the right of the
screen.
Each sample can be subsequently
selected to check the relative number by
pressing the + or – buttons on the right
side of the screen.
This indicates the greatest leak noise
acquired and the probable position of the
leak.