Despatch LAD Series WITH PROTOCOL PLUS - Manual (Page 13)

5
THEORY OF OPERATION
This section details the function and operation of assemblies and subassemblies on the
Despatch LAD Series Ovens. These ovens have the most effective heat distribution
system and the fastest processing time of any lab ovens their size. They are especially
useful for testing, preheating, sterilizing, drying, aging and curing as well as other
production applications. Horizontal airflow with precision digital control delivers uniform,
fast processing. The overall result is efficient productivity under strenuous conditions.
Figure 1. Horizontal Airflow
The unique Despatch computerized design, moves forced convected heat through
perforated stainless steel walls. The air is recirculated with a high volume fan.
Despatch LAD Series Ovens employ higher volume fans than any competitive model.
The chamber can be densely loaded without interfering with the process. The LAD
series air delivery temperature is within 1/2
° C of the number appearing on the digital
display. Also, fresh air intake is regulated by a panel-mounted damper control. The
exhaust rate is regulated by an adjustable control on the exhaust stack (LAD2-11 and
LAD2-24). The exhaust opening is fixed on the LAD1-42. The exhaust port, located on
the back of the LAD1-42, is covered by a hat bracket. For safety reasons, do not
remove the hat bracket.
Fresh
Air