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Rev.5 (EC 02.293.435)
5. When tuning is complete, the lower display indicates setpoint only and Aut reverts to OFF. The control installs
appropriate PID tuning parameters and retains them in the non-volatile memory.
*To abort auto-tuning, the operator must reset Aut to OFF. Auto-tuning may also be aborted by cycling power off and on.
In all cases, aborting auto-tuning restores all original factory default values.
Temperature overshoot
In most cases this is due to a small sample size being heated with a high wattage heater. The control is set at the factory
with the Power Scale High Output 1 (o.hi1) setting with a value of 100. This value can be adjusted in the setup menu,
reference page 5 for instructions on how to access and navigate through the setup menu. If excessive temperature
overshoot is occurring, adjust the value to 50 and start the heating process from ambient room temperature. If more than
desired temperature overshoot is still occurring, decrease to a lower value and repeat heating process from ambient room
temperature. If the proce
ss temperature doesn’t achieve the set point temperature or takes more than desired amount of
time to reach set point temperature, increase the power scale high output 1 value. This process can take several value
changes to obtain proper temperature control with your particular application setup. It is recommended to initiate the Auto-
Tune process again after the proper power scale high output 1 value has been determined for your application.
Error Code Definitions and Actions
Indication
Description
Possible Causes
Corrective Action
Sensor does not provide
a valid signal to controller
Sensor improperly wired or open,
Incorrect setting or sensor type, or
Calibration corrupt
Correct wiring or replace
sensor, Match setting to
sensor , or Check
calibration of controller
Controller is auto-tuning
the control loop
User started the auto-tune function
Wait until auto-tune
completes or disable
auto-tune feature
Controller is ramping to
new set point
Ramping feature is activated
Disable ramping feature if
not required
Sensor input above high
alarm set point
Temperature is greater than alarm set
point
Over temperature, or Set
alarm source to proper
setting
GLOSSARY
Automatic prompts: Data entry points where a microprocessor-based control "prompts" or asks the operator for
information input.