Pulsar Nova® sound level meter user manual
Page 39
Back Erase
The Back Erase function allows a section of the measurement to be removed from the
data used to calculate the overall values.
An example of this would be if, during the measurement of cars on a road, a large truck
passed by the measurement location. If the intention was only to measure cars, the
truck can be excluded from the overall measurement data by pressing the Pause button
and then using the Back Erase to remove a preset section of noise.
The time that the pause button was pressed, along with the Back Erase duration, will be
excluded from the calculation of the overall noise values such as the Leq, Lmin, Lmax,
LPeak, and the 1:1 Octave Band overall values.
The duration of the Back Erase can be set to between 1 and 30 seconds using the
AnalyzerPlus software. If the Pause function is disabled, the Back Erase function is also
disabled.
Memory
The Nova® has a 4GB removable memory card. This is partitioned into two sections, one
to record time history and one for audio (Audio Note and audio recordings). The space
allocated to each can be configured in AnalyzerPlus.
The free space in the memory is shown in the General View as days or hours available
for both time history and audio. When either partition is full, the Nova® will overwrite
the oldest data in that partition.
To clear the memory and permanently delete all stored data, choose the ‘Clear Memory’
Menu page and follow the instructions on screen. Before permanently erasing the data,
you will be asked to press ‘OK’ to confirm.
Restore Factory Settings
This is in the Advanced Options Menu, and restores the Nova® to the default options for
all user-definable settings in the Menus, and clears the calibration offset. For settings
such as ‘language’ where there is no default, the Nova® will return to the option it was
shipped with.
Follow the instructions on the screen, and press ‘OK’ to confirm. This does not delete any
stored measurements.
Windshield
The Nova® can be used with a WS90 90mm foam windshield which will reduce the noise
levels generated by air turbulence over the microphone capsule.
It can also help protect the microphone capsule from dust and fluids which can affect the
performance of the instrument.
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