ARI Armaturen ES11 EN - Manual (Page 20)

Page 2-20 Rev. 0040601000 1014
Operating and installation instructions 
Electronic positioner ES11
6.6 Slope span setting
ATTENTION !
- Observe the order of the settings:

1. Potentiometer (refer to 6.2) 
2. Effective direction (refer to 6.4) 
3. Zero point (refer to 6.5) 
4. Slope span (refer to 6.6)
- In case of subsequent changes to a setting, the following settings must be
readjusted!
a) Turn the valve stem with the handwheel for the max. control signal in the desired
position, e.g. 20mA or 10V (according to the switch position SW and as shown in 
Fig. 11 : Effective direction). Typically this will be the opened valve.
b) Set the input signal to the maximum required value, e.g. 20 mA or 10 V.
c) Then turn the slope span adjusting screw S until the green and red LEDs are no longer
lit (the slip clutch cuts in after 25 turns). 
If the green LED is lit, turn in clockwise direction. 
If the red LED is lit, turn in anticlockwise direction.
d) If the actuator is at an end position and should it be switched-off by actuating force at this
position, turn the slope span adjusting screw N, so that the red LED lights up just before
it’s release operating point.
e) Switch-off the power supply at ES11, and plug in the series isolating terminal X25 or X28
to the motor again.
f) The electronic positioner ES11 is now ready for operation after connecting the actuating
signal and the voltage supply.
7.0 Care and maintenance
The electronic positioner ES11 requires little maintenance so that specific maintenance
tasks are not specified at set intervals.

Dirt which may build up on the outside should be cleaned from the electronic positioner
ES11 corresponding to operating conditions.
ATTENTION !
Before cleaning electronics the supply line must be disconnected from the mains
(not live). It must be impossible to switch the power on unintentionally while the
mains are disconnected in this way.
Failure to comply may result in death, serious injury or substantial damage to
property.
The electronic positioner ES11 must not be cleaned with watery liquids or with solvents or
detergents which are aggressive, harmful or highly flammable.
Before cleaning, the detergent should preferably be applied to a cleaning cloth. Liquids
must not penetrate into the inside of the electronic positioner.