Hioki LR8400-20, Instruction Manual

Page: 113 / 300

101
3
5
Chapter 5 S
p
ecif
y
ing Crite
ria
for M
easurement
s
You can set recording to start and stop under specific criteria (start/stop triggers),
and to output alarm signals. You can also set specific times to start and stop
recording, using the Timer function.
Triggering is the process of controlling the start and stop of
recording by specific signals or conditions (criteria). When record-
ing is started or stopped by a specific signal, we say the trigger is
"applied" or "triggering occurs".
In this manual,
indicates a "trigger point", as the time at which
a trigger is applied.
Criteria can be specified for the following event trigger types.
Set trigger criteria for individual channels on the Channel [CH] screen, and set trig-
ger and alarm settings for all channels on the [Trig & Alm] screen (p. 116).
Specifying Criteria for
Measurements
Chapter 5
About Triggering
Trigger criteria met
T
T
Trigger Type Description Setting Screen Ref.
Start Trigger
Recording starts when the specified Start Trigger
criteria are satisfied.
[CH] /
[Trig & Alm]
(p. 102)
Stop Trigger
Recording stops when the specified Stop Trigger
criteria are satisfied. When
[Repeat] is enabled
(set to [On] ), recording restarts automatically.
[CH] /
[Trig & Alm]
(p. 102)
Trigger
Source Various trigger criteria can be combined with logi-
cal AND/OR operations for each channel.
[Trig & Alm]
(p. 107)
External
Trigger
Triggering can be applied by an external signal at
the EXT.TRIG input terminal.
[Trig & Alm] (p. 108)
Pre-trigger
Records data acquired during a specified period
prior to each trigger event.
[Trig & Alm]
(p. 110)
Alarm
An alarm signal can be output when any specified
criteria are met.
[CH] /
[Trig & Alm]
(p. 111)
Timer Records at a specified date and time. [Setting] (p. 117)
Pre-trigger (p. 110)
Start (Start trigger)
Stop (Stop trigger)
Alarm
Timer
T T