Grain Systems PNEG-1851 - Manual (Page 46)

Chapter 5: The Drying Modes
• The metering roll speed’s outer offset
• The grain moisture’s inner offset
• The grain moisture’s outer offset
As shown in the following figure, the 5-speed moisture control scheme uses five speed settings to obtain
the target moisture content, and the speed that is selected is dependant on the measured grain moisture.
If the grain’s moisture content exceeds the measured moisture, lower speeds are automatically selected.
Conversely, if the grain’s moisture content is below its setpoint, higher speeds are automatically selected.
See
Setting the 5-Speed Moisture Scheme in Continuous Flow, page 61 for details on how to set up this
control scheme.
Figure 5-5 Speed versus moisture relationship for the 5-speed moisture control scheme
Staged Batch Mode
The staged batch (SB) drying process is a grain drying method comprised of three distinct phases, where
only a portion of the grain is loaded and unloaded at a single time.
As with any drying mode, the main objective is to obtain the appropriate outgoing moisture content for the
type of grain that you are drying. This is accomplished by passing heated air through the grain, thus lower-
ing the moisture level. In staged batch, every phase of the drying process is performed separately: the wet
grain is first loaded into the dryer, dried in the grain columns, and then either cooled and unloaded (in dry
and cool operation), or simply unloaded and then cooled in external cooling bins (in full-heat operation
only). For details on the full-heat and dry and cool operations, see
Grain Drying: Full-Heat or Dry and
Cool, page 80 .
46 PNEG-1851 Vision N2