Grain Systems PNEG-1743 - Manual (Page 26)

5. Operations
26 PNEG-1743 Vision for Tower Dryers
Calibrating moisture: Take several moisture samples of the grain over an extended period of
time, average these values and calibrate the sensors accordingly.
Example: If the dryer’s exiting moisture (dry) is reported at 15.5% on the Vision screen and the
averaged samples yielded a value of 15%, then the calibration screen would be used to enter
-0.5% as the “Dry Moist Offset”.
Calibrating temperature: Take several temperature samples of the grain over an extended
period of time, average these values and calibrate the sensor accordingly.
Example: If the dryer’s incoming temperature (wet) is reported to be 105°F on the Vision screen
and the average samples yield a value of 100°F, adjust the “Dry Temp” to -5.
6. Extended Setup Screen
The following list can be modified here:
1. Diagnostics:
Figure 5L
Check Light Outputs: Allow the user to verify the controller is attempting to illuminate each
individual switch. If there is a check mark present on the Vision screen, the corresponding
switch should be lit. If not, there is a wiring issue.
Check Switch Wiring: Allows user to verify the controller is recognizing switch positions
correctly. If the “Fan 1” switch is in the “AUTO” position, the “FAN 1 AUTO” box should be
checked. If not, there is a wiring issue.
Setup Metering Rolls: This option can be used to calibrate the SCR board.
Set MR Speed Via Screen: Normally, the meter roll adjustment knob on the control panel
is used to set the metering roll setpoint. In the event of a knob malfunction, the metering roll
setpoint can be adjusted by this screen.
Calibrate Moisture Sensors: Previously mentioned in the preceding “Setup Screen”
section
on Page 23 . This is just another way to access those settings.