NDB Technologies AE-150 - Page 55

AE- 1 5 0 s y s t e m – U s e r M a n u a l
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directly deducted from a distribution of pulse
amplitudes.
 Qpeak: Magnitude of the highest discharge measured
in the PrPD acquisition.
 NQN (normalized quantity number): As defined in the
technical specification IEC 60034-27 (2006):“Normalized
area under a straight line fitted to the pulse counts in
each magnitude window of a pulse height analysis, in
which the pulse counts are expressed as a logarithm of
the pulses per second and the pulse magnitude window
is a linear scale”.
 NQS: Sum of all discharge magnitudes divided by the
time of acquisition.
 D (quadratic rate): Sum of the squares of the individual
measured discharge magnitudes divided by the
acquisition time.
 Show: Select the acoustic(s) sensor(s) to show in the graphs.
 Trend Overview graph: Displays all PrPD acquisitions taken in the
selected acquisition. Move the red cursors to narrow the
selection.
 AE Trend: Displays the acoustic PrPD acquisitions.
 PD Trend: Displays the PD channel PrPD acquisitions.
 Inspection Comments Log: Shows the inspection comments log.
 PrPD Channel Display: Set the channel to display.
 Time: Displays the date and time of the selected acquisition.
 Cycles Count: Number of cycles within the acquisition.
 Frequency: Shows the Power frequency.
 AE value, PD value: Displays the acoustic channel statistical value
for the selected acquisition.
 Measurements Comments: Shows the comments for the
selected PrPD acquisition.
o Options: The option tab is used to configure preferred units and sound
velocities in Mirador Tx software.