36 • iPro Case Controller I&O Manual FM V1.01 026-1738 Rev 1
11.2. EEV and EEPR Calibration Procedure
When power is cycled to the XEV20D driver and during power-up, the driver will initiate a valve calibration procedure for both valve
positions. The application will calibrate the valves during the first defrost cycle after a set number of hours depending on the value of
parameter ExtraS_Cal_Timer. So if the timer value = 24 hours, the valves will be automatically calibrated during the first defrost for
each 24 hours. Additionally, a calibration can be performed on each valve from the Visograph menu.
11.3. Valve Calibration From the Visograph Display
To calibrate electronic valves from the Visograph, press and hold the T4 key on the display for three (3) seconds to enter the Main Menu.
Note that the keys are labeled T1 - T8 in these graphics only and not on the actual device
.
Enter the Command menu by pressing the key labeled T4 again and use T8 to scroll all the way to the right.
To initiate a calibration on the valve, press the key labeled T5 to scroll down, then T4 (SET) to edit. Change the value from NO to YES
and choose SET to save the selection. The value will remain at YES for a few seconds while the calibration is performed and will
automatically toggle back to NO.
Figure 11-2 - Enter the Main Menu By Holding the T4 Key
Figure 11-3 - Initiate Valve Calibration
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