© Thermo Hybaid. Issue 1.0, January 2002
5
To close, gently lower the lid. At this point a ‘click’ should be heard as the catches are engaged. This
action lowers the heated lid onto the samples and closes the block, ensuring a tight contact.
The pressure; exerted by the lid can be adjusted for tubes or plates by rotating the knob so that the
relevant icon is aligned to the front of the unit (see Figure 1.1). It is defaulted to the tube pressure, for
the plate pressure turn the knob clockwise until the plate icon is aligned with the front of the unit.
Careful consideration should be taken in selecting which setting should be used. When using a 0.2ml
block, any consumable (including compression pad) whose height exceeds 10mm above the rim of the
block should be used on tube setting whether it is a plate or not. With a 0.5ml blocks, any
consumable (including compression pad) whose height exceeds 5mm above the rim of the block
should be used on tube setting whether it is a plate or not.
Please note that the tube thermistor
must be removed before selecting the plate mode.
Figure 1.1:
Open Lid Icon
Tube Icon
Plate Icon
The temperature of the heating plate is set at 120
°
C (max. surface temperature) with power control
effected by the control chassis.
The heated plate inside the lid is switched on and off from within the program. The lid operates once a
program is activated, with a heating time of typically 2-3 minutes before cycling commences. During
this heating time, the block is automatically cooled to 4°C to maintain sample integrity. The block can
be operated with or without the lid being switched on (the lid is automatically deactivated in units fitted
with flat block modules).
WARNING:
Both the tops of reaction vessels and the surfaces of the heated lid
assembly (in particular the inner surfaces), can become very hot during normal
operation. Touching the surfaces can cause burns. Do not touch the heated plate
without safety gloves.
1.4 Input / Output Sockets
•
The Px2 has a power input socket located on the back of the unit
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