FC Series w/ EDC Control
Thermal
MNL-047-A
Division Rev.
004
FTS
12
Stone Ridge, NY USA
845.687.0071
PROPORTIONAL CONTROL MENU
rr
Ramp Rate
CPb
Cooling Band
It
Integral Time
dt
Derivative Time
Cct
Cool Cycle Time
Programmed transition rate from old setpoint to new setpoint, in degrees per minute. Ramp
Rate is more of a slew limiter, because the available ramp rate is obviously limited by the
thermal load and the pulldown capacities of the refrigeration system.
Width of the temperature span across which cooling is proportionately applied to the
process, in degrees. Note: this is band centered on the setpoint, so a CPb of 5 degrees defines
a window that’s +/- 2.5 degrees from the setpoint.
Integral (Automatic Reset) time, in seconds. Time constant for adjustment of proportioning
action that serves to correct deviations from setpoint.
Derivative (Rate of Change adjustment) time, in seconds. Time constant for adjustment of
proportioning action in order to reduce the slew rate of the process as it approaches the
setpoint. Derivative time is automatically limited to 1/4 of the Integral Time (It).
Period of operation of the cool/bypass refrigeration valves, in seconds. In order to reduce
wear on the solenoids and valves, the period (total time on and off) may never be less than
two seconds. Additionally, the duration of either On or Off is never less than 0.25 seconds.
Summary of Contents for FLEXI-COOL FC100
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