ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc.
Page 8
disabled. TS-2 Channel Status is reported as state #2 (detector not installed). This mode is
indicated by “*OFF*”
on the LCD.
On
: When set to the “On” mode, the channel output is enabled and menu set-up navigation
is enabled.
Call
: When set to the “Call” mode, the channel output is continuously in the Call state
regardless of the presence or absence of vehicles over the loop. The loop oscillator is
disabled. This mode is indicated by “*CALL*” on the LCD. This option is can be useful for
checking controller response and other troubleshooting activities.
Disabled
: When set to the “Disabled” mode, the channel output is set continuously in the
No Call state regardless of the presence or absence of vehicles over the loop. The loop
oscillator is disabled. TS-2 Channel Status is reported as state #1 (Normal). This mode is
indicated by “Channel Disabled”
on the LCD.
2.2.2 LCD DISPLAY
The Liquid Crystal Display (LCD) incorporates a white LED backlight. The backlight is
energized when any switch is actuated and remains On for one hour after the last switch
actuation. The backlight improves visibility in poor lighting conditions. A built-in heater is
provided to enhance the LCD performance for cold temperature operation. See Section
3.7.4 for heater operation details.
2.2.3 HIGH INTENSITY COLOR-CODED LED INDICATORS
Red DETECT Indicator
:
•
Vehicle Detection = Solid ON
•
Delay Timing = 2 Hz flash rate.
•
Extension Timing = 4 Hz flash rate.
•
Pending Call in 3
rd
Car Mode = 10 flashes per second.
•
Pending Call in Directional Logic Mode = 10 flashes per second.
•
Open Circuit = 1 single flash followed by a pause.
•
Shorted Circuit = 2 flashes followed by a pause.
•
25% Change in Inductance = 3 flashes followed by a pause.
Yellow FAULT Indicator
:
•
Open Circuit = 1 single flash followed by a pause.
•
Shorted Circuit = 2 flashes followed by a pause.
•
25% Change in Inductance = 3 flashes followed by a pause.
2.2.4 LOOP FAULT MONITOR
The detector continuously checks the integrity of the loop. The system is able to detect
open circuit loops, shorted loops, or sudden changes in inductance exceeding 25% of the
nominal inductance. If a fault is detected, both the DETECT (Red) and FAULT (Yellow)
LEDs continuously emit a sequence of flashes. Each type of fault is identified by a different
flash sequence:
Flash Sequence
Fault
1 flash (per second)
Open Circuit Loop (or Inductance too high)
2 flashes (per second) Shorted Circuit Loop (or inductance too low)
3 flashes (per second)
25% Change in Inductance
In addition to the LED flash sequence, the LCD will display the type of fault condition during
the fault state. If the fault condition is removed, the LCD “Fault” indication and the DETECT