Digital Temperature Controller Reference Manual

HIGH ACCURACY
THERMOCOUPLE CONTROL
FAST COOLDOWN
SOFTWARE TEMPERATURE
CONTROL LOOP
TEMPERATURE RAMPING
AUTOMATIC PROFILING
RECIPE STORAGE
TEMPERATURE ALARM
INTRODUCTION
The DTC's Analog to Digital converter gives
temperature resolution to 0.05.
The DTC provides temperature control using spike
thermocouples at the outside of the process tube or
paddle thermocouples inside the tube.
This optional feature provides shorter cooling time
for a higher production capacity.
The temperature control uses a cascading PID loop
of the spike or paddle thermocouple input signals.
Gain control is provided for limiting the maximum
power output.
Temperature ramping is provided on all zones. This
guarantees a long flat zone during and ramping up
or down, by making use of calculated values from a
profile table or continuously controlling the
temperature using the paddle thermocouples
Automatic profiling is continuously possible during
the process or by means of specially programmed
recipes.
DTC and DPC versions 2I and higher provide an
unlimited number of temperature setpoints in a
process recipe.
An alarm is generated when the temperature rise
above or fall below programmable limits. The alarm
limits can be in the range 0.1-25.5 oC.
BROKEN THERMOCOUPLE ALARM An alarm is generated when a thermocouple is
broken. In spike control the affected zone is
maintained at approximate temperature by using the
thermocouple break output table measured during
profiling. If the zone is in paddle control and the
thermocouples fails control is switched to the spike
thermocouple.
DIGITAL TEMPERATURE CONTROLLER REFERENCE MANUAL 1-2