Cirrus Optimus Green Series, Instrument Hanbook

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Optimus sound level meter - instrument handbook
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4.5.4 Status bar
When the Optimus is not measuring, the status bar shows the date and time. When it
is measuring, it shows the elapsed time and in review mode it shows the measurement
number and the total number of measurements stored.
4.5.5 Overload and under-range indication
Overload is indicated by a red arrow ( ) shown in the information bar.
Overload is also indicated by the word ‘overload’ and under-range is indicated by the
word ‘under range’ (in the chosen language) on the display.
On the sound level view and Leq view, the indicators are situated beneath and to the
left of the large number.
When a measurement is not in progress, the indicator is shown for at least one second,
so that very short transient overload or under-range conditions are visible to the
operator.
When a measurement is in progress, the overload indicator stays on until the
measurement is stopped or reset.
In some circumstances the overload and under range indicators will be shown
simultaneously. In this case the text will be abbreviated to save space.
Note that if any displayed decibel value on the sound level view or Leq view is below
14.0 dB, the value will be replaced by dashes (‘---’). These levels are typically below
the noise floor of the microphone capsule and so will only be encountered during
electrical testing.
4.5.6 ‘Bluescreen’
Under rare circumstances when the Optimus encounters a condition it cannot recover
from, a ‘bluescreen’ error message will show with an error code. If this should happen
to your Optimus, please make a note of the code so the engineers at Cirrus Research
can diagnose your problem accurately. After writing down the code, pressing the right
key will clear the screen and the instrument can be used as normal.
4.5.7 Battery indicator
The status of the batteries is shown in the battery level indicator. When the batteries
need replacing, the indicator will turn red.
4.5.8 Low battery indication while switching on
If the start-up screen flashes quickly when you press the ‘on’ button, the batteries have
insufficient power to start, and need replacing.