Burkert Type 8694 - Manual (Page 58)

58
Operationandfunction
13.1.3. CHARACT -
Select the transfer characteristic between input signal
(position set-point value) and stroke
Characteristic (customer-specific characteristic)
This function can be used to activate a transfer characteristic with respect to set-point value (set-point position)
and valve stroke for correction of the flow-rate or operating characteristic.
The transfer characteristic can be changed via the communications software only.
Factory setting: DIP switch 3 set to OFF (linear)
DIP Switches Position Function
3 ON Correction characteristic for adjustment of the operating characteristic
(linearization of the process characteristic
CHARACT) 24)
OFF Linear characteristic
Table 30: DIP switch 3
The switching position of the DIP switches in the positioner has priority over the communications
software, i.e. settings of the correction characteristic (
CHARACT) which are modified via the communica-
tions software are only active if DIP switch 3 in the positioner is set to ON.
Characteristics which can be selected via the communications software:
Characteristic Description
linear Linear characteristic
1 : 25 Equal percentage characteristic 1 : 25
1 : 33 Equal percentage characteristic 1 : 33
1 : 50 Equal percentage characteristic 1 : 50
25 : 1 Inversely equal percentage characteristic 25 : 1
33 : 1 Inversely equal percentage characteristic 33 : 1
55 : 1 Inversely equal percentage characteristic 55 : 1
FREE User-defined characteristic, freely programmable via nodes
Table 31: Selection of characteristics
A detailed description of the characteristics can be found in the operating instructions for the communica-
tions software for positioners.
24)
The characteristic type can be changed via the communications software only.
English
Type 8694