Equivalent continuous sound pressure level (L
Aeq) measurement
＜ Parameter setting ＞
1）The key operation is similar to the measurement of A-weighted sound pressure level (L
A
)
except that it needs
[Start/Stop]
key input for starting the measurement
(automatic calculation).
2）To display the value L
eq
, keep the "LAeq” key ON in advance in the
<View Mode> 3/3
screen.
① Frequency weighting key ：A,C or Z
② Display mode key ：L
eq
③ Time weighting key ：F or S (Imp)
④ Range key ：Select a range where the bar graph indicates
approximately 2/3 of the full scale.
【Method of selecting
[Range]
Key】
Press
[Range]
key, and choose by cursor keys▲▼, and press
[Range]
key
again to register.
⑤ Measuring time key ：1s, 3s, 5s, 10s, 1m, 5m, 10m, 15m, 30m, 1h, 8h, 24h
and ＊＊＊(until the
[Start/Stop]
key pushed again)
3) The measurement starts with
[Start/Stop]
key.
＜ Display ＞
・Measurement starts with
[Start/Stop]
key pushed, and ends up automatically at the Measuring
time. Digital display indicates the halfway result at the current point of time. ( Display “ Rec
“ blinks while the measurement.)
・When Interval is set to Repeat in
<Memory> 2/3
screen, the measurement is repeated in every
Measuring time. (This is used when continuous measurement is needed.)
・By pushing
[Start/Stop]
key in course of the measurement, calculation is done using the data
so far.
・By pushing
[Pause]
key in course of the measurement, the calculation can be done without
using the data in the latest 3 or 5 seconds.
※This function can be set in the Data delete in the
<System> 1/3
screen.
・When ＊＊＊ is selected, the final data is calculated and displayed only when
[Start/Stop]
key
is pushed or 199 hours have gone through.
・All the keys do not respond during the measurement :
[Start/Stop]
,
[Mode]
,
[Light]
1s ０００ｈ００ｍ００ｓ
40
130
Stp A Fast Leq
Time weighting： Any of F, S or Imp (doesn't
influence the measurement.)
Frequency weighting：A,C or Z
Display mode
Leq
Measuring
time
Rec:Blinking during
recording
Stp: Holding state
＜Menu＞
②Display
④
[Range]
key
③Time weighting
key
(
F
:Fast,
S
:Slow)
⑤Measuring
time key
2)
[Menu]
key
①Frequency
weighting key
(A･C, Z)
<View Mode> 3/3
Lp ：INST
(A)view LA05：OFF
LAeq ：ON
LA10：OFF
LAE ：OFF LA50：OFF
LAmin
：OFF LA90：OFF
LAmax ：OFF LA95：OFF
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