36
SVANTEK 977W User Manual
The
Rolling Time(1 & 2)
parameters define „time frame” for "Rolling Leq"
calculation. The Rolling Leq are presented as LR+<time frame>. For example, if
the
Rolling Time
is equal to 30 minutes, the appropriate result will be named as
LR30
and will be calculated each second as Leq of last 30 minutes. If the
Rolling
Time
is in seconds, for example is equal to 50s, the result name will have letter
"s" in the end (
LR50s
), to make it different from 50 minutes LR result (
LR50
).
The
user
can
easily
get
into
the
General Settings
screen
during
the
measurement performance from the result
view. It is necessary to enter some result field
(for example,
RMS
) with the use of
▲ / ▼ or
◄ / ► push-buttons and press
<ENTER>
.
<ENT>
5.2
Setting the measurement trigger
– Measurement Trigger
The
Measurement Trigger
sub-list enables
the user to set the parameters for the
measure trigger. The
Measurement Trigger
is a context sub-list in which the triggering can
be switched off or on (
Trigger
), when on the
source of the triggering signal (
Source
) can
be determined, its level (
Level
) and
sometimes also the speed of changes
(
Gradient
). Triggering of the measurement
(
Trigger
) can be switched off using the
◄
push-buttons.
<ENT>
Triggering is switched on if one of its six available modes is selected:
Slope +
,
Slope
–
,
Level +
,
Level
–
,
Grad +
or
External
. If the instrument works with the triggering switched on, the appropriate icon appears on the display
when the triggering condition is not fulfilled.
The triggering condition is checked every 0.5 millisecond.
Slope type trigger
In case when
Slope +
is selected, the measurement starts when the rising result
value (
Source
) passes above the level determined by the selected
Level
value.
When
Slope
–
is selected, the measurement starts when the falling result value
(
Source
) passes below the level determined by the selected
Level
value. The
measurement is stopped when the conditions set in the
General Settings
sub-
list are fulfilled or after pressing the
<Start/Stop>
push-button or after receiving
the proper control code remotely.
Note:
When measurement is waiting for the slope trigger the “trigger
slope” icon appears alternatively with the „play” icon.
or
Level type trigger
When
Level +
or
Level
–
is selected for the measurement the triggering condition
is checked every 0.5 millisecond. The measurement is recorded only when the
result value (
Source
) has the greater / lower level than that determined in the
Level
position otherwise the measurement result is skipped.
