Velocity Scaled; Plunger Hold; Figure 7 - Velocity Scaled Output Mode; Figure 8 - Plunger Hold Output Mode - ETC Sasquatch User Manual

5.2.2 Velocity Scaled

This allows for the velocity information to be transmitted along with the switch closure. The switch will
always close for the Minimum Output Hold Time as above, but will be held closed for an additional time
that is calculated based on the Output Hold Scale parameter. In the example below, the Output Hold
Scale is set to 10 ms per m/min of velocity, which is the default. The plunger arrived at 200 m/min, so
2000 ms or 2 seconds was added.

5.2.3 Plunger Hold

This mode works similar to the Cyclops. When the plunger arrives, the output switch is closed for the
Minimum Output Hold Time (default of 1 s). As long as the plunger continues to move in front of the
sensor, the output switch is held closed as the plunger is considered present. While the plunger is
departing (5 Departure Detection Periods; typically 5 s), the switch will continue to be held. If the
plunger does not appear within this window, the switch is then released.
Open
Output Hold
Time (1 s)
Closed
Open
Minimum
Output Hold
Time (1 s)
Closed

Figure 7 - Velocity Scaled Output Mode

Minimum
Plunger
Present
Plunger
Arrival

Figure 8 - Plunger Hold Output Mode

Extended
Output Hold
Time (2 s)
Plunger
Arrival
Time (s)
Plunger
Departing (5 s)
Time (s)
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