pH 170/
pH 296
Parameterization
148
Example 1:
Rel 1 was configured as a PI controller with the function of LL. A value of
LL = pH 5.0 results in the possible proportional band of 0.1 pH to 5.00 pH.
In a proportional band of 1.0 pH, the PI
controller controls a range of pH 4.0 to pH
5.0 in proportion to the measured value.
Example 2:
Rel 2 was configured as a PI controller with the function of UL. A value of
UL = pH 9.0 results in the possible proportional band of 0.1 pH to 5.00 pH.
In a proportional band of 3.0 pH, the PI
controller controls a band of pH 9.0 to pH
12.0 in proportion to the measured value.
10%
pH4 pH5
90%
rel. switching duration
Measured
value
10%
pH9
pH12
90%
Measured
value
rel. switching duration
