Hioki LR8400-20, Instruction Manual

Page: 122 / 300

5.1 Triggering Measurement Start and Stop
110
When trigger timing is set to [Start] or to [Start/Stop], not only the
waveform following the trigger can be measured, but a specified
span of the waveform before triggering as well.
However, when trigger timing is set to
[Stop] , pre-trigger settings are
disabled.
Make these settings on the
[Trig & Alm] screen.
See: "Key Setting Procedure" (p .103)
Setting Criteria for Pre-Trigger Measuring (Pre-Trig)
T
[Pre-Trig]
Set the amount of time to record before each trigger
event.
To also measure the waveform after triggering, the recording
time must be set longer than the pre-trigger time.
(See "Pre-Trigger and Recording Times" below.)
The maximum settable
time is displayed.
Increment/decrement by 1
(when the recording interval is longer than 2 seconds,
increment/decrement by one recording interval)
Increment/decrement by 10
(when the recording interval is longer than 10 seconds,
increment/decrement by one recording interval)
HiLogger pre-trigger time can be set up to 99 days. Logger Utility settings
of 100 days or more are reduced to 99 days when transferred to the
HiLogger.
Difference between [
Waiting for pre-trigger
] and [
Waiting for trigger
]
When measurement is started, the specified pre-trigger length is recorded. This period is indicat-
ed as the
[Waiting for pre-trigger] .
After the specified pre-trigger length has been recorded, the period indicated as [Waiting for trig-
ger] continues until a trigger occurs.
During the
[
Waiting for pre-trigger
]
interval, trigger criteria are ignored.
T
Pre-Trigger (15 min)
Recording
(10 min)
Measurement ends
with the trigger event
When the recording time is shorter
than pre-trigger time When the recording time is longer than
pre-trigger time
T
Pre-Trigger (5 min)
Recording
(15 min)
Measuring before
and after triggering Ends when the record-
ing time has elapsed
Pre-Trigger and Recording Times