7-26 824 Reference Manual 11/8/00
Example:
To measure 2 samples per second, set Hist Period to 16 and Period
Units to 1/32s (16/32=1/2).
This setting provides the following four options:
When German functionality is
enabled, the history period will be
rounded to the nearest 5 second
interval, and a warning, “Setting
Conflict”, will appear. If the “Period
Units” equal 1/32nd of a second,
then the period will be forced to a
count of 160 (5 seconds).
1/32s -
This sets the History Period Unit to 1/32 sec-
ond intervals. Since the instrument samples the detec-
tor 32 times per second, this is the smallest resolution
time period that you can use. If you set the time his-
tory period to 1/32 second (i.e. period setting = 1 and
unit setting = Sample = 1/32s), the instrument will
store every sample it takes.
In the SSA instrument, the shortest
time history period is 1/8th of a sec-
ond. If the period is set to [1/32] of a
second the history period will be
forced to multiples of 4 to support
the maximum data rate of 8 samples
per second and the warning “Setting
Conflict” is displayed.
1.0s -
This sets the history period unit to one second.
10.0s -
This sets the history period unit to ten sec-
onds.
60.0s -
This sets the history period unit to sixty sec-
onds.
Other Level - (LOG only)
Use the
Other Level
setting to select the second measure-
ment level stored in each time history record along with the
L
eq
. This setting provides the following options:
None -
The instrument stores the L
eq
but does not
store a second level.
Pk-I -
The second level the instrument stores is the
greatest instantaneous level (L
pk
) detected by the pri-
mary peak detector that occurred during the time his-
tory period. The primary peak level is weighted
according to the state of the
Pk Weighting
setting.
Pk - II -
The second level the instrument stores is the
greatest instantaneous level (L
pk
) detected by the sec-
ondary peak detector that has occurred during the
time history period. The secondary peak level is
weighted according to the state of the
Weighting
set-
ting.
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