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Sound Level Meters – User Manual
4.5.4 Status bar
When the instrument 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 instrument encounters a condition it cannot recover from,
a ‘bluescreen’ error message will show with an error code. If this should happen to your
instrument, please make a note of the code so 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.
Summary of Contents for Optimus+
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Page 22: ...Page 22 Optimus Sound Level Meters User Manual A pin identifies the measurement location...
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