Maintenance
5-12
Part 1107600_03
2014 Nordson Corporation
Calibrating the Level Sensor
The melter is shipped with the level sensor calibrated for standard adhesive.
If recalibration becomes necessary, follow this procedure.
1. Operate the melter normally until the tank is empty.
2. Remove all debris or charred adhesive from the sensor probe. Refer to
Cleaning the Tank earlier in this section, then return here to continue.
3. Ensure that the melter is switched on.
4. See Figure 5‐6. Remove the base side panel to access the level sensor.
WARNING! Risk of equipment damage, personal injury, or death. This
procedure requires you to perform work with the power on. Follow electrical
safety procedures and observe all high‐voltage indicators.
5. Remove the plug that covers the sensor adjustment screw.
6. Turn the adjustment screw as follows:
clockwise until the LED turns yellow,
counterclockwise until the LED turns green,
counterclockwise again one-half (
1
/
2
) additional turn
NOTE: When an LED turns yellow, the system believes that adhesive is
present. Because we know that adhesive is not present, turning an
adjustment screw counterclockwise until the LED turns green and then
adding an additional one‐half (
1
/
2
) counterclockwise turn calibrates the
sensor.
7. Reinstall the base side panel and restore the system to normal operation.
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