Series S Solid-State Staging Controller Instruction Manual
8
Series S Solid-State Staging Controller Instruction Manual
9
2.3 Operation
The operation of a typical staging controller on a
heating process is as follows:
When power is applied, all steps at first will be off.
Then each step will turn on at the set time interval
until all steps are turned-on. When the process
reaches operating temperature (or as the process is
approaching setpoint depending on the proportional
band setting of the temperature controller), the
staging controller will cut back the number of steps
on, until the process requirements are satisfied.
After stabilization and if the time proportioning
adjustment is set at minimum, no steps will turn on
and off unless the process temperature changes
enough to require more or less steps if the time
proportioning adjustment is turned clockwise on an
‘Up-Down’ stepper, the last step ‘on’ will cycle on
and off to provide closer temperature control. On the
circular stepper, the next ‘off’ step will be turned on,
the first ‘on’ step will be turned off, and this action
will continue around as in a circle. The fastest rate
occurs with the adjustment full clockwise. Note:
The step interval is set by the timing module. Time
proportioning is only on the last step – and the fastest
rate is 5 seconds.
2.4 Adjustments
The following adjustments are found under the cover
plate on the yellow (step delay) module.
If a touch-up is desired, turn gently and wait at least
1 minute to observe results.
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