ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc.
Page 6
countdown timer is being displayed; “P” for Presence, “D” for Delay, “E” for Extend, and “d”
for Disconnect.
2.1.7.2 LOOP FREQUENCY DISPLAY
When in the “Freq” display mode the LCD screen displays the loop frequency in kilohertz
(KHz). Note: the loop frequency is displayed in Hertz when setting the loop frequency
parameter.
2.1.7.3 LOOP INDUCTANCE DISPLAY
When in the “Induct” display mode the LCD screen displays the equivalent system loop
inductance (loop and lead-in inductance) within the range of 20 to 2500 microHenries.
2.1.7.3.1 LOOP INDUCTANCE
∆
L/L DISPLAY
When in the “Induct” display mode, the LCD screen displays the percentage of inductance
change during the CALL state.
2.1.7.4 VEHICLE COUNT DISPLAY (ORACLE EC SERIES )
When in the “Count” display mode the LCD screen displays the current vehicle count. The
count can be reset by pressing the SCROLL switch Up.
2.1.7.5 DEFLECTOMETER
®
PIE GRAPH
For each channel, the LCD screen displays a pie graph which assists in determining the
optimum sensitivity setting by showing the change in inductance caused by traffic moving
over the loop and how this graph is affected by the sensitivity selected. Optimum sensitivity
setting is reached when the DEFLECTOMETER (numeral to the right of the pie graph)
reaches the value of ten (10), based on typical size vehicles (see section 3.2.1). This
results is a 50% filled graph. Selecting the optimum sensitivity level insures detection of all
vehicles, including motorcycles and hi-bed trucks. This helps to eliminate any further
service calls to adjust detector sensitivities.
Note that when operating in the Probe mode (see 2.1.4.1) the 50% optimal pie graph level
is reported as a quantitative value of 8 instead of 10.
2.1.7.6 DEFLECTOMETER
®
STREAMING GRAPH
While the DEFLECTOMETER
®
displays an instantaneous indication of the current Call
strength, the Streaming Graph display graphically shows the Call strength over time. The
horizontal axis represents a six second interval. The vertical axis represents Call strength.
The graph only streams when there is a Call present and displays approximately six
seconds of data.
2.1.8 EVENT LOG
For each channel, the LCD screen can display the last 25 loop fault conditions and power
events via the “Event Log” menu. A channel reset will not clear the Event Log from
memory. To clear the Event Log memory, select either “Clear Log” or “Clear All” from the
“Event Log” menu.
2.1.9 CHANNEL ID
Up to five (5) characters can be selected to identify each channel of detection.
2.1.10 PAIRED CHANNEL FUNCTIONS
2.1.10.1 3
RD
CAR MODE
Each channel’s “3
rd
Car” mode setting can be enabled by selecting the “3
rd
Car” option in
the “Paired Channels” menu. This means that it takes two channels to implement the