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CPB Programming : The cooling proportional band is measured by a % of PB with range 1~255. Initially set set the
CPB to 100% and examine the cooling effect. If cooling action should be enhanced then
, if cooling
action is too strong then
. The value of CPB remains unchanged throughout the self-tuning and auto-
tuning procedures.
decrease CPB
increase CPB
CPB Programming : The cooling proportional band is measured by a % of PB with range 1~255. Initially set set the
CPB to 100% and examine the cooling effect. If cooling action should be enhanced then
, if cooling
action is too strong then
. The value of CPB remains unchanged throughout the self-tuning and auto-
tuning procedures.
decrease CPB
increase CPB
Adjustment of CPB is related to the cooling media used. When air is used as cooling media, adjust the CPB to
100(%). For oil adjust CPB to 125%. For water, adjust the CPB to 250%.
DB Programming: Adjustment of the DB is dependent on the system requirements. If a more positive value of
DB(greater dead band) is used, an unwanted cooling action can be avoided but an excessive overshoot over the
set point will occur. If a more negative value of DB(greater overlap) is used, an excessive overshoot over the set
point can be minimized but an unwanted cooling action will occur. A negative DB value shows an overlap area over
which both outputs are active. A positive DB value shows a dead band area over which neither output is active.
DB Programming: