BKI GO-36 Manuel de service Page 65

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BKI 09 ATEX 0003X
htk4014a0600p_01.doc
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5.4.1 GAUGE OPERATING LOGIC WHEN THE REFLECTION IS LOST
The product reflection pulse is usually lost when the level is in the top dead zone or near the bottom of the tank.
The diagram below shows the action taken by the gauge depending on where the last reflection was lost.
Use PCSTAR 2 - F8-Marker display function to follow the measurement status of the gauge.
Zone 1 : Dead and detection delay zones
Marker “Tank full” and “Level lost” is displayed when
the product enters the dead zone and no reflection is found.
This will also occur once the level reflection is within the detection delay zone.
The gauge assumes the tank is full and displays the maximum level value.
The gauge searches for a reflection along the entire length of the probe.
Zone 2 : Full zone (and dead zone)
Marker “Tank full” is displayed in this zone.
If the gauge loses the signal in this zone,
it reacts as in zone 1: the tank is assumed to be full.
The gauge searches for a reflection along the length of the probe.
Zone 3 : Central measurement zone
The gauge searches along the length of the probe for
the largest pulse reflection.
If the pulse is lost the reading freezes at the last value.
Marker “Level lost” will be displayed.
Zone 4 : Empty zone
If the reflection is lost here then the gauge assumes the tank is empty and marker “tank empty” is
displayed.
The gauge searches for a reflection in this zone but makes a search along the entire length of the
probe once every minute.
The reading will remain frozen during this time.
The short circuit reflection will become larger than product reflection at this time.
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