14
(2) Auto mode operation
An SD memory card should be inserted in the card slot.
The data will automatically be stored on the card.
With the Auto mode,
L
p
store and
L
eq
store are executed simultaneously
(Separate operation is also possible).
・
L
p
store
This is useful when recording the sound level time profile. The sound level of up to 1,000 hours can be
stored continuously and automatically.
Stored data
：
L
p
or
L
eq
,
1s
（
refer to note of next page
）
Store interval
：
Can be selected from 100 ms / 200 ms / 1 s /
L
Aeq
,
1s
（
L
eq
per second
）
, OFF
（
=
L
p
is not
stored
）
・
L
eq
store
All processed data except sound level are considered as a single data set, and up to 100,000 data sets can
be stored continuously and automatically. This is suitable for a measurement over a specified long
period of time.
Stored data
：
L
eq
,
L
E
,
L
max
,
L
min
, Ly (Sub channel),
L
N
(Percentile sound level)
Processing interval
：
can be selected from 10 s / 1 min / 5 min / 10 min / 15 min / 30 mim / 1 h / 8 h / 24
h / manually selected time (up to 24 hours), OFF
（
=
L
eq
is not stored
）
Approximate times and data capacity are listed below.
Measurement parameter
Data capacity, Stored time
Approximate stored data
capacity per a day
When a 24 hours measurement is executed with a
L
p
store interval of
100 ms and a
L
eq
processing interval of 10 min, the data capacity is
approximately 74 Mbytes per day.
Approximate
L
p
stored data
capacity
When a 1 hour measurement is executed with a
L
p
store interval of
100 ms, the data capacity is approximately 3 Mbytes per hour.
Approximate
L
eq
stored
data capacity
When a 24 hour measurement is executed with a
L
eq
processing
interval of 10 min, the data capacity is approximately 20 kbytes.
When a SD memory card
of 2 GByte (effectively 1.9
GByte) is used
When a measurement is executed with a
L
p
store interval of 100 ms
and a
L
eq
processing interval of 10 min, data can be stored for
approximately 25 days.
(calculation
：
1.9 GByte / 74 MByte
＝
25.7
→
approximately 25
days
）
