Hopper empty LED
Operation
4-11
Part 1120277_01
E 2012 Nordson Corporation
Monitor the Adhesive Level
The hopper empty LED turns on when it is time to load a new adhesive slug.
Refer to Loading an Adhesive Slug.
The melter is also equipped with two identical capacitive adhesive level
sensors:
S The melt-on-demand sensor keeps the reservoir full of molten
adhesive by telling the melter when to melt adhesive in the hopper for
transfer through the melt plate to the reservoir.
S When the reservoir becomes empty, the reservoir-empty monitor will
stop the pump after it rotates the number of revolutions set in the dLy
(delay after empty) motor control parameter. Refer to Setting Up the
Motor Control in Section 3, Installation, to set this parameter.
NOTE: When dLy is displayed, the pump can be started again by
pressing the Pump enable key. The pump will turn the set number of
rotations again before it stops and the dLy message is shown again.
The melter is shipped with both level sensors calibrated for standard
adhesive. If recalibration becomes necessary, refer to Calibrating the
Hopper-Empty Sensor or Calibrating the Level Sensors in Section 5,
Maintenance.
2
1
Figure 4-2 Location of the level sensors
1. Melt-on-demand sensor 2. Reservoir-empty monitor
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