VOLTCRAFT VC940 - V06-09 Provozní pokyny stáhnout pdf (Strana 34)

MultiSystem 4010

Operating Instructions

Rev. 1.5 / 120816 english

Page 34 of 45

recording with a single key pressure from the measured value display; select the

desired channel or the option “Key”

Condition select one of four conditions:

greater the condition if fulfilled when the trigger value is exceeded

smaller the condition if fulfilled when the trigger value is fallen below

rising the condition is fulfilled when the trigger value is fallen below by more than 5 % and

then exceeded (rising edge)

falling the condition is fulfilled when the trigger value is exceeded by more than 5 % and

then fallen below (falling edge)

Value enter the trigger value here

Pretrigger the recording may start before the trigger event happens; the defined percentage

of the recording time will be used to save values before the trigger event

Press

to confirm the settings in the memory menu.

Example for a Trigger Recording

You supervise a pressure system and want to record data as soon as the pressure p1 falls below the

value 120 bar. But you also want to record the last 30 seconds before this event (pretrigger, see

below) and record data for a total time of 100 seconds. This is the correct configuration:

How the Pretrigger works

If a recording has been configured with a pretrigger, the instrument will start to fill a buffer memory

(trigger memory) with measuring data immediately after leaving the menu “Start memory”. This is

indicated by a bar chart.

As long as the trigger buffer is not full, the bar is colored red (

). The recording can be

started, but there are not enough measuring data for the desired pretrigger. The recording time will be

reduced accordingly (example: programmed recording time 100 sec., pretrigger 50 %, trigger event

after 30 sec., total recording time 80 sec.).

If the trigger buffer is full, the bar is colored green (

). If the trigger event does not happen

yet, the measuring values in the trigger buffer will be overwritten, so that the most topical values are in

the memory. If the recording is started, the values from the trigger buffer are recorded and completed

to the programmed recording time. The recording bar will be displayed blue on white (

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VOLTCRAFT VC940 - V06-09 Provozní pokyny Strana 34