Nova-Tech Digi-Sense Termperature Controller RS (Standard Models) - Manual (Page 8)

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SET Key
The SET key allows you to change the control setpoint (SP), using the arrow
keys. Pressing the SET key again will exit the setpoint mode.
ALARM Key
The ALARM key enables you to acknowledge temperature control alarm con-
ditions and silence the audible alarm. Pressing the ALARM key will erase
any alarm messages on the display and stop the ALARM from flashing. If the
alarm condition is still present, the ALARM LED will remain on until the PV
(process variable) is out of the alarm condition.
Refer to Setup Procedures for additional information on setting the appro-
priate alarms.
TUNE Key
The TUNE key will start an AUTO tune cycle. Heat (or cooling) is automati-
cally applied to determine PID values. AUTO tuning must be enabled in the
setup mode for this key to function. Refer to the AUTO Tuning section for
additional information on this setting.
NOTE:
When the TUNE key is pressed, the output is turned full on three
times for a period of time and overshoot of the setpoint will occur.
Do not use the AUTO tune feature if this would have an adverse
affect on your process.
RUN/STOP Key
Pressing this key when the Temperature Controller is stopped will start the
control process and activate the load, if required. Pressing this key when the
Temperature Controller is running will cause it to stop.
HEAT, COOL, TUNE LED Annunciators
These three indicators will light to indicate Temperature Controller functions.
The green HEAT light will turn on when power is being applied to the heater
output. The green COOL light will turn on when the Temperature Controller is in
the cooling mode and power is applied to the cooler output. The yellow TUNE
light will turn on when the Temperature Controller is in the AUTO tuning mode.
How to Use this Product
Here is a summary of the steps required to setup and operate the Tempera-
ture Controller.
1. Install the unit.
Setup your process.
Plug the Controller power cord to an AC outlet, turn unit on.
Plug the heater (or cooler) into the Controller rear panel and install in
your process.
Connect a thermocouple sensor to the rear panel and install in your
process.