Grain Systems PNEG-1702 - Manual (Page 69)

9. Vision/Dri-Tek Dryer Operation
PNEG-1702 ETL Listed GSI/FFI Portable Dryer Manual 69
Figure 9M
19. Once the discharged grain has reached the desired moisture content, turn the Unload switch
to AUTO.
20. With Unload Auger switch is in the AUTO position, the Moisture Control is active. Touch the
M/C button at the bottom right of the Default Operation Screen. When the Moisture Setpoint window
appears, set the moisture setpoint to the output moisture desired. Let the dryer run on these settings
before trying to adjust moisture or meter roll settings.
21. The dryer will immediately switch to the 5 Speed moisture control. If you press the meter roll knob,
you will now notice that there is one meter roll speed to adjust.
How the Moisture Control Works
The controller continuously monitors the moisture coming in and out of the dryer, as well as the column
grain temperature at the end of the drying section. However, the control action is based on the sensor at
the outlet of the dryer. If the moisture coming out of the dryer is not at the target, the controller will speed
up or slow down the unload accordingly. How the meter rolls react depends on the setpoint and the actual
moisture coming out of the dryer. As long as the outgoing moisture is three-tenths above or below the
setpoint, the meter rolls run on the middle speed. Once the moisture begins to drift from the setpoint by
over three-tenths either above or below the setpoint, the speed will automatically switch between middle
and low, or middle and high speed. This is a very fast response and will bring grain back towards the
setpoint quickly.
The manual speed setting is responsible for the first pass of drying because the controller does not yet have
enough information about the grain in the dryer. Set the manual unloading speed as close as it should be
for the grain currently in the dryer before switching to moisture control mode. The manual speed setting
does not need to be adjusted after the moisture control is activated.
Calibrate sensors by touching
the arrow buttons.