DATREND Systems venTest, Руководство по эксплуатации

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venTest OPERATORS MANUAL
Selection of trigger slope is also a trigger condition.
If a rising edge is selected, the trigger condition is true if the flow / pressure rises above the set
trigger value. If a falling edge is selected, the trigger condition is true if the flow / pressure has
dropped below the trigger value that is set.
Delay values define how long the trigger condition must be true (eg. start-flow above 3.0 l/min)
before the trigger becomes active.
If the measured value falls below this value during the delay time, the measurement is not started.
This is how disturbances of measurement, such as those from fluttering values can be
suppressed.
Start and end triggers for flow and pressure can be set in steps of 0.1 l/min or mbar using the '+'
and '-' buttons. Start and end delay can be modified in steps of 10 ms.
The buttons have an auto repeat function, so that a quick change of values is very convenient. A
click on the value itself opens a numerical keyboard for direct value input.
The actual trigger levels are displayed in the graph. As in the main display, it is possible to stop
the graph. The graph may be paused by touching on the graph and resumed by touching the
graph again.
The numeric values resulting from trigger settings can be observed for up to three parameters. For
average calculation refer to the
'General' page.
Figure 33
Operation/Chapter 4
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