56
NRR 2-52, NRR 2-53, URB 55 - Installation & Operating Manual -
850646-00
Confi guring the level controller
Valve calibration in manual mode when a feedback potentiometer is connected
Even with a feedback potentiometer
connected to the controller, the valve
runtime still needs to be established
and entered precisely.
Open the “Valve” menu.
Active parameters when a feedback poten-
tiometer is connected to the NRR 2-52 level
controller.
Tt
Valve runtime (NRR 2-52 only),
see page 59
100 % (OPEN) / 0 % (CLOSED)
Calibrated valve positions.
The calibrated raw data is shown in
both fi elds.
Raw data
Indicates the current digital
valve position.
Auto / Manual
Switch between automatic and manual
mode.
If no feedback potentiometer is
connected to the level controller, the
parameters are not displayed.
1.
Press the Automatic
button and switch to
manual mode.
2.
Enter “0 %” as the manipulated
variable (Yw).
3.
When the valve is in the
(CLOSED) end position,
confirm the valve position.
4.
The raw data from the central
field is automatically
entered in the 0 % (CLOSED)
field.
5.
Next, enter “100 %” as the
manipulated variable (Yw).
6.
When the valve is in the
(OPEN) end position,
confirm the valve position.
7.
The raw data from the central
field is automatically
entered in the 100 % (OPEN)
field.
