Minilyzer ML1 User Manual

Measurement Functions
start of measurement: The sound pressure level measurement is
re-started every time
• The LEVEL SPL screen is entered
• The filter selection is changed.
• The clock is reset.
• The time weighting selection is changed.
• The bargraph range selection (RNGE) is changed.
Sound Pressure Level: The equivalent continuous sound pressure
level (also time-averaged sound level) is indicated in dBL eq , dBL Aeq ,
dBL Ceq , depending on the selected filter in the filter menu.
Example:
• select in the main menu the filter A-WTD
• the measurement unit is changing to dBL Aeq and the minimum,
maximum and actual sound pressure level readings below are
A-weighted.
Below the time-averaged SPL reading one of the following values
may be displayed (select with the cursor keys):
• ACT: actual sound pressure level (SPL)
• MIN: minimum sound pressure level acquired during the
measuring time indicated by the clock. The minimum value is
stored until a new lower reading has been taken.
• MAX: maximum sound pressure level acquired during the
measuring time indicated by the clock. The maximum value is
stored until a new higher reading has been taken.
pause: The L eq and min./max. measurement may be freezed for a
user defined time.
• Select the pause symbol and press the enter key.
• The pause symbol is flashing.
• The actual SPL reading is continuously displayed and not
freezed.
• Select the pause symbol and press the enter key to continue the
measurement, visible by the continuing counting clock.
Clock: Duration in hours:minutes:seconds of the actual measurement;
select the clock and press the enter key to reset the time and restart
the measurement.
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