Filter
Top Products
OTC25 P
Operation
Proportional Band
Proportional Band is a PID parameter that represents the amount of
deviation of the controlled variable required to move through the full
range, expressed in % of span or degrees of temperature. This para-
meter can also be expressed as “Gain” (the wider the band, the lower
the gain).
Rate
Rate is a PID parameter (Derivative Action) that produces a corrective
signal proportional to the rate at which the controlled variable is
changing. It is used to correct for overshoot and undershoot.
Reset
Reset is a PID parameter (Integral Action) that produces a corrective
signal proportional to the length of time and magnitude that the con-
trolled variable has been off setpoint. It is used to accommodate load
changes.
Heat Cycle Time
Heat Cycle Time is displayed in seconds, and can be set from 0 to 120
seconds. A setting of zero represents a heat cycle time of 300 mil-
liseconds.
Cool Cycle Time
Cool Cycle Time is displayed in seconds, and can be set from 0 to 120
seconds. A setting of zero represents a cool cycle time of 300 mil-
liseconds. This menu parameter will only be displayed if output 2 is
configured to be a cool output.
Deviation Band Alarm
A Deviation Band is a pre-set number of degrees, plus and minus,
around the Setpoint Value, ex.
+
10° F. A Deviation Band Alarm provides
an indication to the operator that the actual temperature has either
exceeded or dropped below the chosen deviation. This parameter can
be turned off or adjusted from 1 to 252° F (1 to 140° C). When
the process variable is outside the deviation band, the alarm is indicat-
ed by flashing the display (regardless of whether setpoint or actual
temperature is displayed and activating an output, if configured as
such).
Output 2 Configuration
Output 2 may be configured as either a control output or as an alarm
output for the deviation band alarm. When configured for control, out-
put 2 acts as a cool PID output. When configured for an alarm, output
2 is activated when the deviation alarm is active and deactivated when
the deviation alarm is inactive.
Display Units
This allows the operator to have the display indicate either degrees
Fahrenheit or degrees Celsius.
Input Type
Sensor input type may be either a Type J or Type K thermocouple.
9