4.6.2. MEASURING THE EQUIVALENT CONTINUOUS SOUND LEVEL (LEQ)
(1) Change from the SPL (Sound Pressure Level) mode to the Leq mode by pressing the
key for 2 seconds.
(2) Press the
measurement time.
(3) When the time set has elapsed, the measurement automatically terminates and the symbol
is displayed.
(4) During these measurements, the
The pause intervals are not included in the measurement.
(5) During a pause, the pause symbol is displayed.
(6) To end the measurement early, press the
(7) If an input signal is outside the range during the measurement, the
check light appears to indicate that the recorded data include values above or below the
measurement range.
(8) When the Leq measurement is over, the data are stored automatically.
(9) In the Leq mode, press ▲ or ▼ to display the previous Leq measurement results, or up to
99 items of data numbered in the form
During this procedure, all of the keys are inactive except for
still be used.
4.7. SETTING THE DATE AND TIME
The instrument has a clock to time-stamp the data.
(1) Press the
displays the date and time in the form Year-month-day Hour:minute:second.
(2) Press the or key to change the first item, then
The order in which they are set is: Year → Month → Day → Hour → Minute → Second. Press the
key to confirm. If you want to abort the setting in progress, press the
Remark: An internal reserve backs up the clock when the instrument is off. This reserve is recharged
by the batteries. The clock can run for several days on the backup reserve alone. If the instrument is
unused for an extended period, the batteries should be removed so that they will not leak and damage
it. After reinserting the batteries, remember to set the date and time.
key to start the measurement. The symbol is displayed with the elapsed
key to go to the settings mode, then or to make the setting; the screen
key can be used to pause and resume the acquisition.
key for 2 seconds.
no. XX (XX= 00 ~ 99).
27
or
,
or
to set the next item.
key to cancel.
, which can