Despatch LND 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 LND 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 LND Series Ovens employ higher volume fans than any competitive model.
The chamber can be densely loaded without interfering with the process. The LND
series air delivery temperature is within 1/2° C of the number appearing on the digital
display. Nitrogen intake is regulated by separate purge and maintain panel-mounted
flowmeters. The cooling water flow is controlled by an adjustable valve and monitored
by a flowmeter located on the rear of the oven.
Inert Gas