Marathon Monitors Inc.
configuration list. ‘func’ should be set to ‘Vpos’, ‘VAL.L’ must be set to ‘0’ and ‘VAL.H’ to ‘100’.
Exit from configuration and you are now ready to calibrate the position feedback potentiometer. Proceed as follows.
1.In Operator level, press the AUTO/MAN button to put the controller in Manual mode.
2.Drive the valve to its fully open position using 
.
3.Press 
until you get to
4.Press 
to get to
5.Press 
or 
to turn ‘PCAL’ to ‘on’.
6.Press 
and the upper readout indicates ‘Pot’.
7.Press 
or 
to get to
8.Press 
to go to
9.Press 
or 
to see
10.Calibration is complete when the display returns to
11.Press 
and 
together to return directly to the Operator level.
12.The controller should still be in Manual mode.
13.Drive the valve to its fully closed position using 
.
14.Press 
until you get to
15.Press 
to get to
16.Press 
or 
to turn ‘PCAL’ to ‘on’.
17.Press 
and the upper readout indicates ‘Pot’.
18.Press 
or 
to get to
19.Press 
to go to
20.Press 
or 
to see
21.Calibration is complete when the display returns to
22.Press 
and 
together to return directly to the Operator level.
23.Press the AUTO/MAN button to place the controller in AUTO and the calibration of the position feedback potentiometer is now complete.
AACC 2000 Carbon | 61 | Nov. 1, 1997 |