TD80™ Level Gauging and Overfill Prevention System Product Manual
Page 120 TD80 Operation/ Rev. 2, August 4, 2015
5.4 MODES OF OPERATION
5.4.1 Alarm Disable Mode
The Finch display has a feature that allows the user to disable all of the alarms on the
unit, while still displaying the level of liquid in the tank. While in this mode the display will
show “oFF”, notifying the operator that the alarm functions are disabled. To view the
current level of liquid while in this mode, the operator can press either button on the front
panel to enter display mode.
5.4.2 Display Mode
In this mode the Finch display shows the current tank level, as well as any errors
received from the TD80 transmitter. The unit remains in Display Mode for 30 seconds
before returning to Off Mode.
If the Finch Display does not receive any information from the TD80 transmitter for 6
seconds, the unit displays four dashes (----) to indicate a communications failure.
5.4.3 Monitor Mode
In this mode the Finch Display shows the current level, error messages, and alarm
information sent by the TD80 transmitter. The unit responds to all alarms and errors. To
enter Monitor Mode, the PTO signal must be active or the Gauge Enable switch, if
installed, is ON. From Monitor Mode the Fill/Fall Alarm is set by momentarily pressing
either front panel button.
The Finch Display shows the current level and when the level is below 5 ½” the unit will
display “2 LO”. (If the display does not receive any information from the TD80 transmitter
for 6 seconds, the display will show four dashes (----) and triggers the Fail Alarm).
The Spill Alarm, Fill/Fall Alarm and the HH Alarm are all active in this mode and will
respond if the conditions are reached. For more information on the alarms, please see
the Alarms section of this manual.
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