Swann AMU-II Oxytrace Operator's Manual page 60

AMU-II Oxytrace
Program List and Explanations
5.2.1.43
5.2.1.43.10
5.2.1.43.20
5.2.1.43
5.2.1.43.11
5.2.1.43.21
60
Ziegler-Nichols method for the optimization of a PID controller:
Parameters: Setpoint, P-Band, Reset time, Derivative time
Y
a
L
A
Response to maximum control output
B Tangent on the inflection point
X Time
The point of intersection of the tangent with the respective axis will
result in the parameters a and L.
Consult the manual of the control unit for connecting and program-
ming details. Choose control upwards or downwards.
Setpoint: User defined precess value for the selected parameter.
P-Band: Range below (upwards control) or above (downwards con-
trol) the set-point, within which the dosing intensity is reduced from
100% to 0% to reach the set-point without overshooting.
Control Parameters: if Parameter = Oxygen
Setopint:
Range: 0.00 ppb –20.00 ppm
P-Band:
Range: 0.00 ppb –20.00 ppm
Control Parameters: if Parameter = Temperature
Setopint:
Range: -30 to + 130 °C
P-Band:
Range: 0 to + 100 °C
B
A
X
Xp
Tn
Tv
= 1.2/a
= 2L
= L/2
A-96.150.541 / 111223