Input Calibration 
294  UDC3500 Universal Digital Controller Product Manual  3/07 
Step  Operation  Press  Result 
 
 
or  
until you change the input selection in the upper display back to the 
proper selection. You will see: 
Upper Display = Original Input Selection that matches your 
type of sensor. 
Lower Display = INn TYPE 
n = 1 to 5 
4 
Return to Normal 
Operation 
Lower 
Display
 
to return to Normal operating mode. 
The factory calibration will be restored. If the problem is not 
corrected, contact the Honeywell Technical Assistance Center at 1-
800-423-9883  USA and Canada