Rotisseries; Variable Axis Rotisseries - Thermo Scientific Shake n Stack 6240 Operating And Maintenance Manual

Rotisseries

Section 5
There are two kinds of rotisseries available; variable axis and tube
rotisseries. Information follows.
Variable Axis
The Shake 'n Stack is equipped with a variable axis rotisserie. This allows
the user to alter the angle at which bottles can be held in the rotisserie. A
Rotisseries
small offset from horizontal of between 1-15° causes fluid to flow from end
to end within the bottles during rotation (see Figure 5-1). This "wave"
motion provides a more vigorous and active hybridisation, or washing
stage, and can allow probe volumes to be reduced to as low as 0.07-0.17 fl.
oz. (2-5 ml). To achieve the optimum active wave conditions requires
adjustment of the rotisserie angle. Note that a large angle offset from
horizontal (15°) combined with a low probe volume (<0.03-0.07 fl. oz.
[1-2 ml]) can produce dry areas on the membrane and so should be
avoided.
To alter the bottle angle:
1. Release the two securing screws visible on the front rotisserie wheel
using a Phillips screwdriver.
2. Put the rotisserie into the oven and place a bottle in the rotisserie.
3. Rotate the free wheel to the desired angle.
Figure 5-1. Variable Axis Rotation
Thermo Scientific Shake 'n Stack 5-1