ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 127)

Parameter Settings 8-37
Logic
Pressing the ALT key enables the user to select between normally open and
normally closed. Selecting normally open ensures the relay closes once the
designated threshold is met. Selecting normally close ensures the relay closes
immediately after setting the parameter and opens once the designated threshold is
met.
Trigger Levels
This menu displays only when the trigger level function is selected.
Figure 8-50 Setting the trigger levels
The start and stop point settings determine whether the corresponding trigger serves
as a switching threshold (ON > OFF) or as an in-range alarm (ON < OFF).
Impulse Parameter
This menu displays only when the Impulses function is selected.
Figure 8-51 Setting impulse parameters
Select from the following options:
z
Duration Select an impulse duration between 0.01 and 2.0 seconds. The
ratio between impulse and break is 1:1. It is useful to increase the impulse
duration beyond the 0.5-second default setting for slow PLC inputs or when
mechanical counters are in use.
z
Amount This parameter defines when the impulse occurs. The measured
amount (e.g., gallons flowing) will be integrated internally until the selected
value has been reached. An impulse signal of the duration programmed
previously will be emitted, afterwhich the integrated internal value will be set
to 0 again. This process will recur indefinitely.