Control Dynamics - Models 105A and 107 Comparison
Model 105A has partial Bi-Directional Heat/Cool Control. This means the cooling
can be modulated between full on and partial cooling. Control at set point
involves "bucking" heat against partial cooling.
Model 107 has full Bi-Directional Heat/Cool Control. This means the heating
and cooling can be modulated full on or off. This provides more responsive
temperature control - particularly at moderate temperatures - as shown in the
chart below.
This chart shows the control dynamics when cooling down to a 23.0°C
set point. The 105A undershoots to 21.9°C and takes nearly 10 minutes
to stabilize after crossing 24°C. The 107 stabilizes to within 0.3°C of set point in approximately
1 minute. The resolution on this chart is expanded - minor perturbations
represent 0.1°C. |
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