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Tonghui TH2840 Series - Trigger

Tonghui TH2840 Series
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The current monitoring value is displayed in the Im monitoring field on the <Meas Disp> page.
Settable state: ON/OFF, respectively means to turn on/off the level monitoring function.
Note: The calibration function of the instrument has an influence on the level monitoring function.
Therefore, when the correction data changes, the level monitoring value also changes. The ON/OFF
status change of open circuit/short circuit/load correction function will also affect the level
monitoring value.
3.4.8 Trigger
It mainly involves the trigger mode, trigger delay, and step delay settings.
Schematic diagram of trigger delay time and step delay time:
(Note: The set time in the figure is the preparation time for the signal source control of the
instrument measurement, range switching, etc.)
3.4.8.1 Trigger mode
Parameter setting attributes: enumerated type.
The choice of trigger mode determines the trigger condition of the instrument test. This series
provides 2 trigger modes to be set:
1) Continuous trigger: continuous repeat test
2) Single trigger: Each time you press the [Trigger] key on the front panel, and each time the
HANDLER interface receives a positive pulse trigger signal or remote command, a trigger
command is given, and a test is performed.
Note: When testing, a trigger signal is received, the trigger signal will be ignored. Therefore, the
trigger signal needs to be sent after the test is completed.
When you need to trigger from the optional HANDLER interface, set the trigger mode to single
trigger mode.
3.4.8.2 Trigger delay
Parameter setting attribute: numeric input.
Trigger delay refers to the delay time from when the instrument is triggered to the start of
measurement.
The trigger delay time setting range is: 0 s to 60 s, and the minimum resolution is 1 ms.
When the instrument is used in an automatic test system, the trigger delay function is very useful.

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