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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
Deadband:
If the control temperature is above the setpoint temperature plus deadband, the relay
output is turned off. If the control temperature is below the setpoint temperature, the output is
turned on.
Range:
1°F (1°C)–10°F (6°C)
Default:
5ºF (3°C)
Fail Safe:
The Fail Safe control button turns the power on or off to the heating cable if the circuit
loses all valid RTDs. When the last remaining sensor for control fails (or communication with the
sensor is lost), the ACS-UIT2:
•
Signals an alarm for the failure of the sensor
•
Changes control of the circuit to the fail safe control selected
•
Changes the control status display to indicate that control of the circuit is in the fail safe state
•
Records the events
When the sensor for control is returned to service, the ACS-30 controller signals the alarm has been
cleared, returns the circuit to its normal control mode, and records both of these events.
Options: Power On or Power Off
Default:
Power On
Schedule:
Tapping on this button will bring up the Scheduler. See Appendix 5.2 24/7 Scheduler on
page 127 for more information.
ASSIGNING RTDS
Tap Setup|RTDs window to assign RTDs after the control mode and parameters have been set.
In this mode you have the option of setting up to four RTDs for pipe temperature sensing. For
detailed information on the RTD window refer to 2.2.3 Assigning and Sharing RTD Control and
Monitoring on page 30.
Fig. 3.67
Setup|RTDs window (Grease/TM Waste)
