Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 61)

IM 12J05D02-01E
Parameter setting 5-25
100
50
0
ton toff
50% 50%
% duty cycle control
Duty cycle
ton > 0.1 sec
Duty cycle
toff > 0.1 sec
Duty cycle
Proportional
Range
DO
% of output range Time Setpoint
Figure 1. Duty cycle control
100
50
0
% controller output
Proportional
Range
0.3 s
Maximum pulse frequency
50% pulse frequency
No pulses
0.3 s
DO
% of output range Time
Setpoint
Figure 2. Pulse Frequency control
DO
Wash Recovery
Interval Time
Time
t w t r
Figure 3. Dynamic response during wash