Gossen MetraWatt R2600, Руководство по эксплуатации, Страница: 33 / 42

GOSSEN-METRAWATT GMBH 33
Evaluation of the trial run
– Apply a tangent to the curve at intersection P of actual value and set point and/or switch-off point of the output.
– Measure out time
∆
t .
– Measure out oscillation width x
ss
, for step controller overshoot
∆
x .
If a limitation was set for the set point, it is required to correct the proportional band
Y H positive: Multiply Pb I by 100 % / Y H
Y H negative: Multiply Pb II by –100 % / Y H
Parameter values
tu 1.5
•
∆
t
∆
t – ( tY / 4)
tc tu / 12 tY / 100
Pb I (x
ss
/ MBU)
•
100 % (x
ss
/ MBU)
•
200 % (
∆
x / MBU)
•
50 %
Pb II – Pb I
•
(T
I
/ T
II
) – Pb I
•
(T
I
/ T
II
) –
Parameter Two-state controller 3-state controller Contin. controller Split range controller Step controller
P
∆
t
∆
x
x
ss
T
I
T
II
dbnd = 0 dbnd = MBU (only for three-state/split range controller)