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3.2. LISTENING
While LISTENING, the display will remain blank but the 3x LEDs above and below the display
will flash every 5 seconds to indicate that the unit is active.
While LISTENING the unit uses the algorithm described in 3.4 DETECTION ALGORITHM to
detect a pig passage.
If a pig is detected then the unit will start signalling detection as per 3.3 DETECTION.
If the CONTROL BUTTON is pressed then the unit will enter the menu system as per 3.5
SINGLE BUTTON MENU INTERFACE.
3.3. DETECTION
While signalling detection the display will illuminate to show a PIG DETECTED message along
with the time and date of the event, the 3x LEDs above and below with display will flash every
1 second and the relay and current loop outputs will change state.
The unit will remain in this state for the length of time defined by the OUTPUT DELAY before
re-entering LISTENING mode. The OUTPUT DELAY can be bypassed by pressing the CONTROL
BUTTON.
The OUTPUT DELAY controls how long the unit will signal an event for. Usually it will be
configured to give the pig enough time to get out of range of the sensor after it has been
detected to avoid re-trigger. When dealing with pig trains, the expected pig speed and
separation should be used to configure a suitable value for the OUTPUT DELAY such that the
unit will not detect the same pig twice but will enter LISTENING mode in time to detect the
next pig.
ID5002P MANUAL RevA01
Page 7 of 21
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