Thermo Scientific ALPS 3000, Руководство пользователя

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8
Operational Procedure
8. Operational Procedure
The ALPS 3000 has been designed to reliably seal plates of different heights and different plastics, using a
variety of films. These components will require different sealing conditions.
The quality and strength of the seal created between the sealing film will vary with different conditions. In
general, increasing either the sealing temperature or duration of seal, gives a stronger, more complete seal;
however over-sealing on a regular basis can cause damage to the plate being sealed. This in turn, reduces
the number of times a particular plate can be resealed. Therefore a balance has to be achieved that gives
an acceptable seal with the minimal plate damage or distortion.
Another optimization factor to be taken into account is the surface area of the plate.
Plate with thin raised rims around each tube, have a reduced surface area compared to a plate with wide
raised rims. Therefore less heat is needed to seal the thin rim plate in comparison to the wide rim.
The pressure that the heater plate exerts during sealing is pre-set and cannot be adjusted. Plates without
raised seals are not considered suitable for heat sealing.
8.1 - Temperature and Time Setting:
The following table gives a guide as to the sealing time and temperature for different materials.
Plate Material Temperature Setting Time Setting
Polystyrene 145° C - 165° C 3 Seconds - 5 Seconds
Polypropylene 150° C - 175° C 3 Seconds - 5 Seconds
Polyethylene 150° C - 170° C 3 Seconds - 5 Seconds
8.2 - Commands, Indications and warnings:
The ALPS 3000 is software controlled, employing micro-controllers. All commands, indications and
warnings are effected via the touch sensitive LCD display panel located on the front of the unit.
The sequence of events is as follows:
8.3 - Setting the sealing operation:
With a plate in position on the Shuttle, the SEAL segment is pressed to start the sealing operation.
If the sealing plate is not up to temperature, the display will indicate it is heating, and the actual
temperature compared to the set temperature. The display flashes ‘Sealing’ during the operation and then
returns to the seal screen, ready for another operation.