HARRICK ATC-024-2 - Double Loop Control; Setting the Thermocouple Types

DOUBLE LOOP CONTROL
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When using the ATC with accessories equipped with two thermocouples, the temperature
controller needs to be programmed in the following way:
•
Turn on the power to the controller (Figure 1),
leaving the power to the heaters turned off.
SETTING THE
THERMOCOUPLE TYPES
•
Simultaneously press both the Up-arrow S and
the Down-arrow T keys for approximately 3
seconds until the Input Menu prompt InPt
appears in the upper display and the Setup Menu
prompt SEt appears in the lower display:
InPt / SEt
NOTE:
The controller has four Setup Menus: Input, Output,
Global and Communications. Use the Up-arrow S and
the Down-arrow T keys to select a menu and the MODE
key to step through the menu prompts.
Pressing the DSPY key (Figure 3) returns the controller to
the display Loop from any prompt in the menu.
•
Press the MODE key. In1 will appear in the
lower display.
• If the upper display does not show an H, the
symbol for the K-type thermocouple used in most
Harrick accessories, press the Up-arrow S key
until it does. If the item to be heated does not
use a K-type thermocouple, please see the
Watlow manual for the correct setting.
• Press the MODE key five times. In2 will appear
in the lower display.
• If the upper display does not show an H, the
symbol for the K-type thermocouple used in most
Harrick accessories, press the Up-arrow S key
until it does. If the item to be heated does not
use a K-type thermocouple, please see the
Watlow manual for the correct setting.
• Press the DSPY key to return to the main display
format.
CAUTION:
Changing the value of ln1 changes most other prompts to the factory default values.
Document all settings before changing sensor type. Verify the correct sensor type before
making a change.