© Thermo Hybaid. Issue 1.0, January 2002
36
Simulated Tube Control (SIM TUBE)
This temperature control method uses an algorithm similar to tube control. However, with simulated
tube control, the block temperature overheat characteristic which is used to eliminate the sample
temperature lag is based on calculated values, rather than the temperature monitored by the tube
thermistor.
Similar considerations apply when transferring protocols from a block control machine as discussed
above, and the extension lead can again be used.
Reactions using Simulated Tube Control do not require the tube thermistor to be connected, but
sample loading and volume details must be entered when prompted by the run screen. For all tube
reactions in a 0.2ml or a 0.5ml thin walled tube, the volume factor is the
total reaction volume in
µ
l
in one well, including any oil overlay.
Simulated Plate Control (SIM PLATE)
This mode of control operates on a similar principle to simulated tube control (
see Figure 6.1
).
However, in this case, the control algorithm has been adjusted so that the programmed temperature is
achieved in the volume inside a plate well. The system is optimised for the 0.2ml block with thin
walled polypropylene plate.
Figure 6.1 Modes of Control used with the Px2
a.
Active Tube Control
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