A useful feature that has been incorporated into the latest versions of the Super Seal™ is the Adjustable LSI function. It provides the operator with the ability to establish a level or threshold for the LSI circuit to operate an alarm.
If the output as displayed on the digital meter falls below the operator determined set point, the LSI relay contacts will change state. These contacts are provided to warn the operator that the induction sealing power level has dropped below the alarm threshold set point. The alarm contacts may be used to switch power to a warning light or activate an audible alarm.
To accomplish an induction seal, the power supply power level must be set to a sufficient level to melt the polymer layer on the foil, developing a bond between the container and the foil seal. The LSI threshold should be set below this minimum output power level. In the event the power supply operating power level is either adjusted, or falls below the LSI threshold level, the LSI circuitry will activate the LSI relay, effectively functioning as an on/off switch for the alarm.
During normal operation, if the output level falls below this set point the RUN indicator light will extinguish and the LSI relay contacts will change state. It is important to note that the LSI Alarm by itself will not interrupt operation of the power supply, even though there may be insufficient power to develop an adequate seal.
When the output is adjusted fully downward the power supply will operate at a minimum level necessary to develop the magnetic field. This level is dependent on the cap sealer model. For the Super Seal™ 50 it is 55%, the Super Seal™ 75 is 40%, and the Super Seal™ 100 is 35% of maximum power level. The LSI threshold level must be set above the minimum power level to be effective.
Enercon’s Super Seal induction cap
sealer features an adjustable loss of