Doc. Name: NMC-PRO ׀ User Guide Ver 3.05.03 Revision: 2.2 Page: 30
Crop Management Technologies
Manual Calibration
To ensure that vents perform accurately, manually calibrate the system at regular intervals.
There are two calibration methods which differ in how the vent movement is measured:
•
TIME: Calibrate the vent according to the Running Time (time that elapses from fully
open to fully closed).
•
MEASURED: Calibrate the vent according to its position. This calibration method is
used when a Vent Position sensor is installed.
Table 1: Vents System Calibration Course of Action
TIME MEASURED
1. Make sure all manual switches of the
electrical switch board are set to the
AUTO position
1. Make sure all manual switches of the
electrical switch board are set to the
AUTO position
2. Set the Drive vent % 0% 2. Set the Drive vent % 0%
3. Verify visually that the vent is completely
closed
3. Verify visually that the vent is completely
closed
4. Change Calibrate now
YES 4. Change Calibrate now
YES
5. Wait until the Calibrate now changes
back to NO
5. Wait until the Calibrate now changes
back to NO
6. Set the Drive vent % 100%
6. Set the Drive vent % 100%
7. Verify visually that the vent is completely
opened
7. Verify visually that the vent is completely
open
8. Change Calibrate now
YES 8. Change Calibrate now
YES
9. Wait until the Calibrate now changes back
to NO
9. Wait until the Calibrate now changes
back to NO
Calibration is complete!
Calibration is complete!
Go to 9. Curve mV-% to view readings
1.
Vent # – Vent number corresponding with the Digital Outputs – System Installation
menu
2.
Drive vent % (Press Enter to display drop-down menu)
None - Operates as defined in the Vent Program
0% - Drives vent to be completely closed (0%)
100% - Drives vent to be completely open (100%)
3.
Calibrate position % - Define the current position of the vent once the Drive vent % is
in the desired position
4.
Calibrate now (Press Enter to display drop-down menu) – Select YES once the desired
position has been achieved, the controller then will record the new measured values
(time/mV)
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