EDI ORACLE E Series User manual

THIS MANUAL CONTAINS TECHNICAL INFORMATION FOR THE ORACLE 2E, 2EC,
2ECX, 4E, 4ECX, 4H and 4HX, PCB Issue K, Firmware 3.5
REVISION: APRIL 2017
pn 888-0652-001
ORACLE E SERIES
Rack Mount
2E, 2EC, 2ECX, 4E, 4ECX, 4H, 4HX
Enhanced Loop Monitor
Operations Manual

THE ORACLE LOOP MONITORS ARE DESIGNED AND MANUFACTURED IN THE USA
BY EBERLE DESIGN INC.
PHOENIX, ARIZONA.
AN ISO 9001:2008 REGISTERED COMPANY
INFORMATION CONTAINED HEREIN IS PROPRIETARY TECHNICAL INFORMATION
OF EBERLE DESIGN INC. PUBLICATION, REPRODUCTION OR USE IN WHOLE OR
PART IS NOT PERMITTED EXCEPT UNDER TERMS AGREED UPON IN WRITING.
DEFLECTOMETER IS A TRADEMARK OF EBERLE DESIGN INC.
©COPYRIGHT 2016 EDI.

Table of Contents
Section 1 General ............................................................................................................. 1
1.1 Description ............................................................................................................. 1
Section 2 Functions ......................................................................................................... 2
2.1 General Functions .................................................................................................. 2
2.1.1 Front Panel Controls ..................................................................................... 2
2.1.1.1 Oracle 4H Display Select Control......................................................... 2
2.1.2 Sensitivity...................................................................................................... 3
2.1.3 Loop Frequency ............................................................................................ 3
2.1.3.1 Frequency Stability Graph.................................................................... 3
2.1.3.2 Noise Filter .......................................................................................... 3
2.1.4 Sensor Modes (Oracle EC Series) ................................................................ 3
2.1.4.1 Probe Mode (Oracle EC Series)........................................................... 4
2.1.4.2 Rail Mode (Oracle EC Series) .............................................................. 4
2.1.5 Presence / Pulse Modes ............................................................................... 4
2.1.6 Delay and Extend Function ........................................................................... 4
2.1.6.1 Call Delay Timer .................................................................................. 4
2.1.6.2 Call Extension Timer............................................................................ 4
2.1.6.3 Timer Control Inputs ............................................................................ 5
2.1.7 Channel Display............................................................................................ 5
2.1.7.1 Count down timers............................................................................... 5
2.1.7.2 Loop frequency Display ....................................................................... 6
2.1.7.3 Loop Inductance Display...................................................................... 6
2.1.7.4 Vehicle Count Display (Oracle EC Series ) .......................................... 6
2.1.7.5 DEFLECTOMETER®Pie Graph........................................................... 6
2.1.7.6 DEFLECTOMETER®Streaming Graph................................................ 6
2.1.8 Event Log...................................................................................................... 6
2.1.9 Channel ID.................................................................................................... 6
2.1.10 Paired Channel Functions ........................................................................... 6
2.1.10.1 3rd Car Mode...................................................................................... 6
2.1.10.2 Directional Logic ................................................................................ 7
2.1.11 Set Factory Default Settings........................................................................ 7
2.2 Operational ............................................................................................................ 7
2.2.1 Channel Output Control ................................................................................ 7
2.2.2 LCD Display.................................................................................................. 8
2.2.3 High Intensity Color-Coded LED Indicators ................................................... 8
2.2.4 Loop Fault Monitor ........................................................................................ 8
2.3 Vehicle Counting (Oracle EC Series)...................................................................... 9
2.3.1 Vehicle Counting (AccurateCount) Display.................................................... 9
2.3.2 Vehicle Counting (AccurateCount) Mode....................................................... 9
2.3.3 Vehicle Counting (AccurateCount) Loop Configurations................................ 9
Section 3 Programming ..................................................................................................10
3.1 Installation.............................................................................................................10
3.1.1 Main Menu ...................................................................................................10
3.1.2 Oracle 4H Display Select Control .................................................................10
3.2 SET UP Menu .......................................................................................................10
3.2.1 Sensitivity.....................................................................................................10
3.2.1.1 Adjusting sensitivity using the DEFLECTOMETER®............................11
3.2.1.2 Adjusting sensitivity without using the DEFLECTOMETER®................11
3.2.2 Frequency....................................................................................................11
3.2.3 Paired Channel Modes.................................................................................12
3.2.3.1 3rd Car mode.......................................................................................12
3.2.3.2 Directional Logic mode .......................................................................12
3.2.4 Operational Modes.......................................................................................12

3.2.4.1 Presence Mode...................................................................................12
3.2.4.2 Timing.................................................................................................13
3.2.5 Channel ID...................................................................................................14
3.3 Vehicle Counting (Oracle EC Series).....................................................................14
3.3.1 Counting Type (AccurateCount) ...................................................................14
3.3.2 Vehicle Counting Output (AccurateCount)....................................................14
3.4 Display Modes.......................................................................................................14
3.5 Loop Fault Monitor ................................................................................................15
3.6 Event Log..............................................................................................................15
3.7 System Menu ........................................................................................................15
3.7.1 Run Menu Item ............................................................................................15
3.7.2 System Info Menu Item ................................................................................15
3.7.3 Temperature and Voltage Menu Item...........................................................15
3.7.4 LCD Display Heater Menu Item....................................................................15
3.7.5 Options Menu Item (Oracle EC Series) ........................................................16
3.7.5.1 Probe Gap Menu Item.........................................................................16
3.7.5.2 Stream Menu Item (Oracle ECX Series) .............................................16
Section 4 Theory of Operation........................................................................................17
4.1 General .................................................................................................................17
4.2 Trouble Analysis....................................................................................................17
4.2.1 LCD or LED not lit - detector does not operate or have power......................17
4.2.2 Fault and Detect LEDs flashing ....................................................................17
4.2.3 Detector does not detect all vehicles ............................................................18
4.2.4 Detector is noisy/chatters/gives false detect CALLs .....................................18
4.2.5 Poor Loop connections ................................................................................18
4.2.6 Poor Loops ..................................................................................................18
4.3 Communications Port Error Display (X series only) ...............................................18
4.3.1 Receive........................................................................................................18
4.3.2 Transmit.......................................................................................................18
4.3.3 Serial Port Errors .........................................................................................18
4.3.3.1 Framing ..............................................................................................19
4.3.3.2 Overrun ..............................................................................................19
4.3.3.3 Noise ..................................................................................................19
4.3.4 Protocol Errors .............................................................................................19
4.3.4.1 CB - Control Byte Error .......................................................................19
4.3.4.2 CE - Checksum Error..........................................................................19
4.3.4.3 CR - CRC Error...................................................................................19
4.3.4.4 FE - Frame Error.................................................................................19
4.3.4.5 ME - Missing End................................................................................19
4.3.4.6 MS - Missing Start ..............................................................................19
4.3.4.7 PP - Invalid Protocol ...........................................................................19
4.3.4.8 TO - Timeout ......................................................................................19
Section 5 Loop Installation .............................................................................................20
5.1 Loop Design..........................................................................................................20
Section 6 Specifications .................................................................................................22
6.1 Mechanical............................................................................................................22
6.2 Environmental .......................................................................................................22
6.3 Electrical ...............................................................................................................22
6.4 Tuning...................................................................................................................22
6.4.1 Loop Inductance (Tuning) Range .................................................................22
6.4.2 Environmental Tracking ...............................................................................22
6.4.3 Grounded Loop Operation............................................................................22
6.4.4 Lead-in Length.............................................................................................22
6.4.5 Loop Input (Lightning Protection) .................................................................22
6.4.6 ORACLE 2E, 2EC Response Timing............................................................23

6.4.7 ORACLE 4E, 4EC, 4H Response Timing .....................................................23
6.5 Connector Pin Assignments ..................................................................................23
6.5.1 ORACLE 2E, 2EC Pin Assignment...............................................................23
6.5.2 ORACLE 4E, 4EC, 4H Pin Assignment ........................................................24
6.5.3 Polarization Keys .........................................................................................25

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 1
Section 1
General
1.1 DESCRIPTION
The ORACLE 2E (2EC) and 4E (4EC) Enhanced Loop Monitor series is a full featured two
channel and four channel inductive loop vehicle detector conforming to TS1-1989 (R2005),
170/2070 requirements, and TS2-2016. For Nema TS2, the ORACLE 2E (2EC) and 4E
(4EC) meet the requirements for a Type C and D configuration respectively. The ORACLE
2ECX and 4ECX meet the requirements for a Type CC and DD configuration respectively.
The Oracle 4H is a four channel unit with a half width front panel, providing a compact
method for increasing the number of detection channels in a given rack space.
The ORACLE features a front panel mounted multi-line graphic Liquid Crystal Display
(LCD) which assists the user in setting up the unit and can display operational parameters
and diagnostic information for all channels simultaneously (Oracle 4H only displays two
channels simultaneously). A built-in heater is provided to enhance the LCD performance for
cold temperature operation. An easy to use natural language menu structure guides the
operator through the set up process and features plain English prompts on the LCD to
describe functions and parameters. Two toggle switches per channel are used to navigate
through the menus and make data entries as required. All programmed settings are stored
in non-volatile memory. If power is disrupted or a detector reset occurs the programmed
settings will not be altered.
Loop diagnostic capabilities incorporated within the ORACLE enables the diagnosis of
shorted or open circuit loops and sudden inductance changes exceeding 25 percent of the
nominal value. For each channel, the type of fault is displayed on the LCD and signified by
the fault indicator emitting a different flash sequence. The last 25 loop faults are stored in
an event buffer and can be reviewed in the Event Log. This information can greatly assist
the user in the diagnosis of loop related problems.
The front panel LCD provides the Frequency, Inductance, and Count (2EC, 4EC only)
display views. The Loop Frequency, ∆L/L%, Loop Inductance, DEFLECTOMETER®Pie
Graph, DEFLECTOMETER®Numeric Value, DEFLECTOMETER®Streaming Graph,
Frequency Stability Graph, Sensitivity Level, Mode of Operation, and Vehicle Counting
Accumulator can be viewed on the front panel LCD.
The ORACLE offers a unique and very useful feature called the DEFLECTOMETER®. The
DEFLECTOMETER®display allows you to use visual and numeric aids to assist in
determining the optimum sensitivity setting by showing the change in inductance caused by
traffic moving over the loop. The DEFLECTOMETER®aids in setting the detector channels
quickly and easily to the most optimum sensitivity level to ensure trouble-free detection of
all vehicles, including motorcycles and high bed vehicles (see section 3.2.1). Sensitivity can
be adjusted in real-time with a vehicle continuously occupying the detection zone.
The CALL outputs are fail-safe and conform to TS2-2016 standards. Call outputs are
optically isolated. The ORACLE detectors will tune to any loop and lead-in inductance
between 20 and 2500 microHenries and will provide satisfactory operation with lead-ins as
long as 5000 feet. Delay, Extend and User-Defined timing functions are included.
The ORACLE 2EC and 4EC models add the AccurateCount (Vehicle Counting) feature that
enables vehicles to be counted with vehicle totals displayed on the LCD panel. The
AccurateCount output (ORACLE 2EC only) also provides a secondary output for each
channel for every vehicle in the loop zone at the same time. The unit can be programmed
on each channel for one loop to eight loops connected together in series.
The ORACLE 2ECX, 4ECX, and 4HX provide a front panel mounted EIA-232
communications port. The Oracle X series support the EDI Oracle Serial Protocol. Consult
the factory for details and specifications.

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 2
Section 2
Functions
2.1 GENERAL FUNCTIONS
2.1.1 FRONT PANEL CONTROLS
Two high-reliability sealed front panel toggle switches for each channel are used to select
operational and display settings. One switch is designated “MENU (Back/Select)” and is
used to accept the setting displayed and to move to the next menu item or go back to the
previously displayed screen. The second switch is designated “SCROLL (Up/Down)” and
allows you to move through each selected menu.
2.1.1.1 ORACLE 4H DISPLAY SELECT CONTROL
The ORACLE 4H half width model provides four channel operation, but the LCD will display
information for only two selected channels simultaneously. The top half of the display can
be programmed to display information for either Channel 1 or Channel 3. The bottom half of
the display can be programmed to display information for either Channel 2 or Channel 4.
The selected physical channel number is always displayed in the upper right corner of the
display in white text on a black field.
To change the channel selected for display, press the MENU switch up to the Back / CH
position while in the main display mode (top level of the menu). This will toggle the
selected channel from 1 to 3 on the top display, and from 2 to 4 on the bottom display. For
all other menu levels the up position of the MENU switch provides the Back function.
The LEDs for the Detect (DET) and Fault (FLT) indicators are provided for all four channels
and are always enabled regardless of the channel selected for the LCD display. See
section 2.2.3.

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Operations Manual
Eberle Design Inc. Page 3
2.1.2 SENSITIVITY
There are twenty selectable sensitivity levels per channel. The DEFLECTOMETER® Pie
Graph, DEFLECTOMETER® Numeric Value and a DEFLECTOMETER® Streaming Graph,
make it easy to set-up and optimize sensitivity for each channel. Sensitivity can be selected
from the “SET UP” or “QUIK SET” menus, to optimize vehicle detection on varying loop and
lead-in configurations. Sensitivity is stated in terms of ∆L/L [i.e. as the minimum percentage
change in the total inductance (loop plus lead-in) to which the unit will respond at the given
level.] See section 3.2.1.
Sensitivity
∆L/L
Sensitivity
∆L/L
20
0.0035 %
10
0.113 %
19
0.005 %
9
0.160 %
18
0.007 %
8
0.226 %
17
0.010 %
7
0.320 %
16
0.014 %
6
0.453 %
15
0.020 %
5
0.640 %
14
0.028 %
4
0.905 %
13
0.040 %
3
1.280 %
12
0.057 %
2
1.810 %
11
0.080 %
1
2.560 %
2.1.3 LOOP FREQUENCY
The LCD screen displays the actual loop frequency to help avoid interference which may
occur when loops connected to different detectors are located adjacent to one another.
One of eight (8) settings (normally in the range of 20 to 60 kilohertz) may be selected via
the “SET UP” or the “QUIK SET” menu options. It is recommended that adjacent loops
have a frequency separation of at least 5 KHz.
2.1.3.1 FREQUENCY STABILITY GRAPH
In the Frequency display mode the LCD screen also displays a frequency stability graph
and Q∆f value that allows you to analyze each frequency level to ensure proper selection of
frequency levels. The XY graph displays detector frequency samples with respect to the
reference. The channel reference is in the center of the graph. A variation from the center
of the graph depicts frequency instability on the channel.
Basically a thin smooth graph offers a more optimum frequency selection over a thick or
uneven line. For optimal operation, select the frequency level with the lowest value of Q∆f.
For values of Q∆f higher than 15-20, the Noise Filter option (see Section 2.1.3.2) should be
considered.
2.1.3.2 NOISE FILTER
For installations where the effects of cross-talk or resulting frequency instability are higher
than normal, additional noise filtering can be applied. Three levels of filtering are provided;
Normal, Maximum, and Off. The Maximum level is intended for installations with a high
level of cross-talk between loops where the frequency separation between adjacent loops
is not adequate for reliable operation. Setting the filter mode to Off is intended only for high
speed applications where minimum response time delay is required.
2.1.4 SENSOR MODES (ORACLE EC SERIES)
The Oracle EC series support three different inductive loop types; normal loop, point probe,
and rail mode. The Normal sensor mode is used with conventional inductive loops. The
Probe mode and Rail mode are for special applications.

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 4
2.1.4.1 PROBE MODE (ORACLE EC SERIES)
This mode is intended to support the use of point probe type micro sensors. A probe type
micro sensor is a transducer that converts changes in the vertical component of the earth’s
magnetic field to changes in inductance. The resulting change in inductance can then be
sensed by the Oracle EC series detector. Note that when operating in the Probe mode, the
50% pie graph level is reported as a value of 8 instead of 10 (see 2.1.7.5). A gap setting is
also provided for optimizing the distinction between closely spaced cars and large trucks,
see 3.7.5.1.
2.1.4.1.1 PROBE MODE THRESHOLD
The Probe Mode Threshold allows the user to adjust the hysterisis value for the call to no-
call threshold. The default value is 20% of the call strength which is suitable for most probe
applications.
2.1.4.2 RAIL MODE (ORACLE EC SERIES)
This mode is intended to support the use of inductive loops in a light rail application. Rail
applications often produce residual effects on a train car exit from the detection zone that
can cause the detector to remain in the call state. In this case the loop inductance does not
immediately return to the tuned reference value for a short time period.
2.1.4.2.1 RAIL MODE THRESHOLD
The Rail mode allows the user to adjust the hysterisis value for the call to no-call threshold.
The default value is 20% of the call strength which is suitable for most rail applications.
2.1.5 PRESENCE / PULSE MODES
For each channel, a Presence or Pulse output mode may be selected via the “SET UP”
menu. If Presence mode is selected then a choice of Short, Long, or User defined presence
can be selected (see 3.2.4.1). Short Presence is defined as 30 minutes and Long Presence
is defined as 120 minutes. In User Defined mode, a user setting can be applied. On the
expiration of short or long presence time a detect CALL will be reset. In User defined mode,
the detect CALL can be selected to reset on timer expiration or at the next End-Of-Green
(EOG) signal after the expiration of the timer. The green signal is applied to the Timer
Control input via the edge card connector.
In Pulse mode, a 125 ms ± 25 ms width pulse will be output for each vehicle entering the
loop. The pulse length can be programmed from 125 ms to 60 minutes.
2.1.6 DELAY AND EXTEND FUNCTION
2.1.6.1 CALL DELAY TIMER
For each channel, a delay time of 0.1 seconds to 5 minutes can be set via the “SET UP”
menu. Call Delay time starts counting down when a vehicle enters the loop detection area.
Delay time can be overridden by a green signal at the Timer Control input.
2.1.6.2 CALL EXTENSION TIMER
For each channel, an extension time of 0.1 seconds to 1 minute can be set via the “SET
UP” menu. Call Extension time starts counting down when the last vehicle clears the loop
detection zone. Any vehicle entering the loop detection zone during the Extension time
period causes the channel to return to the DETECT state. The Extension timer can be
enabled upon the following options:
2.1.6.2.1 EXTEND ALWAYS MODE (ALWAYS)
When a vehicle leaves the loop zone and the loop zone becomes vacant, then the extend
timer will be enabled and CALL output will be maintained until the timer times out.

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 5
2.1.6.2.2 EXTEND ON-GREEN MODE (ONGREEN)
If the Timer Control input is inactive and the loop becomes vacant after a vehicle exits, then
the Extend timer will not be enabled and the CALL output will be cleared. When the Timer
Control input is active and the loop becomes vacant after a vehicle exits, then the Extend
timer will be enabled and the CALL output will be maintained until the timer times out. While
the timer is running, the DETECT LED will flash 4 times a second. If the timer is running
and the Timer Control input becomes inactive, the timer will be disabled and the CALL will
be cleared. If the timer is running and a vehicle is detected, the timer will be disabled and
the CALL maintained until the loop again becomes vacant, at which point the extend
process repeats.
2.1.6.2.3 EXTEND DISCONNECT (DISCNNCT)
While the Timer Control input is inactive, the Extend/Disconnect timer is not used and a
CALL is output whenever a vehicle is detected. If the Timer Control input is active and the
loop becomes empty after a vehicle exits, then the Extend Disconnect timer will be
enabled. While the Extend Disconnect is running, the detect LED will flash 4 times a
second. If a vehicle is detected while the Extend Disconnect is running the Extend
Disconnect timer will be disabled. If the Extend Disconnect timer times out while the Timer
Control input is active, then the CALL output will be disabled and future detects ignored.
When the Timer Control input becomes active, the CALL output will be enabled again.
2.1.6.2.4 EXTENSION PLUS DISCONNECT (EXT+DIS)
While the Timer Control input is inactive, the Extend/Disconnect timer is not used and a
CALL is output whenever a vehicle is detected. When the Timer Control input becomes
active the Extend/Disconnect timer is enabled. While the Extend/Disconnect timer is
running, the detect LED will flash 4 times a second. If a vehicle is detected while the
Extend/Disconnect timer is running the Extend/Disconnect timer will be disabled. If the
Extend/Disconnect timer times out while the Timer Control input is active, then the CALL
output will be disabled and future detects ignored. When the Timer Control input becomes
active, the CALL output will be enabled again.
2.1.6.3 TIMER CONTROL INPUTS
Timer Control inputs are provided for each channel to modify the operation of the Delay
and Extension functions. The application of a True (low) state voltage will inhibit the Delay
timing function and/or enable the Extend timing function as described in sections 2.1.6.1
and 2.1.6.2. When the Timer Control input for a channel is active (True) a “G” character is
displayed on the main display screen.
Timer Control inputs are primarily provided for downward compatibility. For the ORACLE
4E, 4EC, and 4H models, a Timer Control input is provided for all four channels. For
channels 3 and 4, the Timer Control inputs use pins that are defined in Nema TS2 as
Detector Unit Address inputs (see 6.6.2). When operating an ORACLE 4E, 4EC, or 4H in a
Nema TS2 detector rack, the Delay and Extend functions may not be available for channels
3 and 4 depending on the wiring of the rack.
2.1.7 CHANNEL DISPLAY
During normal operation each channel displays the Channel ID, Sensitivity setting,
Countdown timers, the Deflectometer, and the option of Frequency, Inductance, or Count
which can be selected by pressing the SCROLL switch Down. When the Timer Control
input for a channel is active (True) a “G” character is displayed.
2.1.7.1 COUNT DOWN TIMERS
The countdown timers are automatically displayed when a vehicle is detected, or in the
case of the Disconnect timer, when the Timer Control input becomes active. The time
remaining is displayed in minutes and seconds. A character is displayed to indicate which

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 3RD CAR MODE
Each channel’s “3rd Car” mode setting can be enabled by selecting the “3rd Car” option in
the “Paired Channels” menu. This means that it takes two channels to implement the

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 7
feature. Therefore, when this feature is enabled in one channel, its paired channel is also
set to the same state.
For the ORACLE 2E and 2EC model, 3rd Car mode links channels 1 and 2 together. For the
ORACLE 4E, 4EC, and 4H models, 3rd Car mode links channels 1 and 2 together, and links
channels 3 and 4 together. When a vehicle is detected on only one of the two linked
channels, the DETECT LED will flash 10 times a second. The “3rd Car” mode is intended to
be used in Protected / Permissive left turn situations. The likely installation is a stop bar
loop for the left turn lane connected to one channel, a queue detection loop (with a small
amount of delay time programmed) for the left turn lane connected to the other channel,
and the output of either channel connected to the Vehicle Call input for the protected
movement of the traffic controller.
As the first vehicle enters the left turn lane it will drive over the queue detection loop. Since
there is no vehicle over the stop bar loop, there is no call output generated. When the
vehicle advances to the stop bar loop, still no output is generated because there is now no
vehicle over the queue detection loop. When traffic in the left turn lane backs up and
occupies both the queue detection loop and the stop bar loop this will cause the detector to
generate a CALL to the traffic controller to service the protected movement for the left turn.
The spacing between the stop bar loop and the queue detection loop controls the size of
the queue needed to generate a call to the protected movement of the controller. The delay
time on the queue detection loop should be sufficient that a vehicle physically overlapping
this loop and the stop bar loop do not generate a CALL.
2.1.10.2 DIRECTIONAL LOGIC
Each channel’s Directional Logic setting can be enabled by selecting the “Direction” option
in the “Paired Channels” menu. This means that it takes two channels to implement the
feature. Therefore, when this feature is enabled in one channel, its paired channel is also
set to the same mode. Channel 1 is paired with Channel 2. In the ORACLE 4E, 4EC, and
4H models Channel 3 is also paired with Channel 4.
Directional logic starts with a CALL on one channel. This channel will go into a pending
state, DETECT LED flashing 10 times a second and NO output call. When both of the
paired channels have detection, the last channel to have detection will output a CALL until
the detection for the last channel ends, even if the detection ends for the first channel.
This feature is intended to be used in freeway ramps for wrong way detection and left turn
lanes where other movements in the intersection tend to clip the detection zone of the left
turn lane. The likely installation is two loops, one after the other in the same lane, spaced
anywhere from slightly overlapping to 5 or 6 feet apart. Under normal conditions both
outputs can never be on at the same time. However, if one of the loops faults, the output for
the faulted loop will come on and stay on until the failure is corrected, and the loop without
the fault will output a call whenever it is occupied. The channel which received the loop
failure will indicate the type of loop fault on the FAULT LED (See section 2.2.4).
2.1.11 SET FACTORY DEFAULT SETTINGS
Simultaneously pressing the Channel 1 “UP/DOWN” switch Down and the Channel 2
“UP/DOWN” switch Up while cycling power will reset the detector to factory default
positions.
2.2 OPERATIONAL
2.2.1 CHANNEL OUTPUT CONTROL
Each channel has one of four output modes to choose from in the SET UP menu; Off, On,
Call, or Disabled.
Off: When set to the “Off” 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

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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 3rd 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

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(Red) LED will return to normal operation. The FAULT (Yellow) LED will continue to flash
with the sequence signifying the type of fault that was last detected. In the case of the
excessive inductance change fault (possible loss of a loop within a series of loops), the unit
will log the fault and retune to the new inductance after a period of two seconds. The
logged fault will be stored in the Event Log memory.
2.3 VEHICLE COUNTING (ORACLE EC SERIES)
2.3.1 VEHICLE COUNTING (ACCURATECOUNT) DISPLAY
If AccurateCount (Enable Vehicle Counting) mode is enabled, the LCD will reflect actual
counts from the secondary “Count” outputs. For each channel, when a vehicle occupies the
loop zone, the LCD counter accumulates one vehicle count per output. The counter is
capable of accumulating 999,999 vehicle counts per channel before rolling over to zero.
2.3.2 VEHICLE COUNTING (ACCURATECOUNT) MODE
For each channel of the Oracle 2EC model only, the AccurateCount (Enable Vehicle
Counting) output feature can be enabled via the “SET UP” menu to produce a secondary
output in addition to the primary CALL output for every vehicle entering the loop zone. Each
vehicle entering the loop will cause an output pulse of 125ms ± 25ms from the secondary
“Count” output on pin S (Channel 1) and pin Y (Channel 2), irrespective of the size of the
loop. See section 3.3.2.
When the Secondary outputs are enabled for counting, the Secondary Status outputs on
pin 16 (Channel 1) and pin 22 (Channel 2) will be set to the True state (TS2 state #1).
2.3.3 VEHICLE COUNTING (ACCURATECOUNT) LOOP CONFIGURATIONS
For each channel, when the AccurateCount (Enable Vehicle Counting) feature is enabled, a
loop configuration must be selected, via the “Set up Counting Type” menu for either a
single loop or up to eight loops connected together in series. For the single loop case, a
Short or Long configuration is also provided. See section 3.3.

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Section 3
Programming
3.1 INSTALLATION
Make connections to power and the loop. The input power supply level should be between
10.8 and 28.8 VDC. The detector has no DIP switches or jumpers to set. If the installation
is of a unit previously installed in another location, it may be advisable to reset the detector
to the factory defaults (see section 2.1.11).
3.1.1 MAIN MENU
The ORACLE has two bidirectional toggle switches per channel marked “MENU” (Back /
Select) and “SCROLL” (Up / Down). The “MENU” (Back / Select) switch is used to move to
the next parameter in the menu and select the values that have been chosen. The
“SCROLL” (Up / Down) switch is used to change the chosen parameter to the desired
value. Pressing the “MENU” (Back / Select) switch while the ORACLE is in normal
operation will cause the LCD to display the MAIN MENU. The dark navigation bar may be
moved to the desired function using the “SCROLL” (Up / Down) switch. When the desired
function is high-lighted by the navigation bar the “MENU” (Back / Select) switch may be
pressed to select the function.
The following functions are available for each channel:
RUN: Returns to the operating screen and resumes operation as before.
RESET: Returns to the operating screen, resets the detector, retunes to the loop.
SET UP: Enters the set-up sequence.
QUIK SET: Enters selected Set-up options that are used most frequently.
EVENT LOGS: Displays the event log screen.
3.1.2 ORACLE 4H DISPLAY SELECT CONTROL
The ORACLE 4H half width model provides four channel operation, but the LCD will display
information for only two selected channels simultaneously. The top half of the display can
be programmed to display information for either Channel 1 or Channel 3. The bottom half of
the display can be programmed to display information for either Channel 2 or Channel 4.
The selected physical channel number is always displayed in the upper right corner of the
display in white text on a black field.
To change the channel selected for display, press the MENU switch Up to the Back / CH
position while in the main display mode (top level of the menu). This will toggle the
selected channel from 1 to 3 on the top display, and from 2 to 4 on the bottom display. For
all other menu levels the Up position of the MENU switch provides the Back function.
3.2 SET UP MENU
Moving the navigation bar to “SET UP” and pressing the “MENU” (Back / Select) switch
down will begin the set-up sequence. The set-up sequence is context sensitive, i.e. the
value of a parameter that is selected may affect which parameter is next in sequence. For
example, if the “Channel Output” is set to “Off” which turns off call and status outputs, then
all other operational parameters are skipped and only the “Channel ID”, and “Display Mode”
can be set-up. This eliminates the need to set parameters that are not relevant to the
desired configuration of the detector.
3.2.1 SENSITIVITY
Sensitivity may be set to any value between 1 and 20. Sensitivity 1 is the least sensitive
and 20 the most sensitive. A DEFLECTOMETER®pie graph and numeric value are located

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in the middle of the screen showing both graphically and numerically the change in
inductance strength as vehicles pass over the loop.
3.2.1.1 ADJUSTING SENSITIVITY USING THE DEFLECTOMETER®
The DEFLECTOMETER®Pie Graph and Numeric Indicator should be blank with no vehicle
over the roadway loop. When a typical vehicle is completely in the detection zone
(DETECT indicator On), the sensitivity should be adjusted up or down until the
DEFLECTOMETER®Pie Graph is shaded to the halfway position and the
DEFLECTOMETER®Numeric Indicator (right side of the Pie Graph) is displaying the value
Ten (10). The detector is now set to the most optimum sensitivity level for the existing loop
network.
NOTE: The DEFLECTOMETER®Streaming Graph is another visual aid when setting
sensitivity to the most optimum position. This is located below the DEFLECTOMETER®Pie
Graph and Numeric Indicator. Whether the Pie Graph or Numeric Indicator was used to
reach the optimum sensitivity value, the Streaming Graph is now equal to the dotted
reference line.
If a typical vehicle located over the roadway loop causes the value of “12” to be displayed
on the DEFLECTOMETER®, the sensitivity should be decreased two levels. This can be
done by pressing the front panel “SCROLL (Up/Down) toggle switch DOWN two times. The
DEFLECTOMETER®Pie Graph and Streaming Graph are visually showing that the
detector is now set to the most optimum sensitivity level.
If a typical vehicle located over the roadway loop causes the value “5” to be displayed on
the DEFLECTOMETER®, the sensitivity should be increased five levels. This can be done
by pressing the front “SCROLL (Up/Down)” toggle switch UP button five times. The
DEFLECTOMETER®Pie Graph and Streaming Graph are visually showing that the
detector is now set to the most optimum sensitivity level.
Note that when operating in the Probe mode (see 2.1.4.1) the 50% pie graph level is
reported as a value of 8 instead of 10.
3.2.1.2 ADJUSTING SENSITIVITY WITHOUT USING THE DEFLECTOMETER®
The ORACLE offers 20 levels of sensitivity (1 to 20). Level 20 is the highest sensitivity.
From the “SET UP” or “QUIK SET” menu options, sensitivity can be selected and manually
set to any desired level by pressing the front panel “SCROLL (Up/Down) toggle up or down.
The new sensitivity value will be displayed on the LCD. The factory default Sensitivity
setting is level 10.
3.2.2 FREQUENCY
The LCD screen displays the actual loop frequency to help avoid interference which may
occur when loops connected to different detectors are located adjacent to one another.
One of eight (8) settings (normally in the range of 20 to 60 kilohertz) may be selected via
the “SET UP” or the “QUIK SET” menu options. The LCD screen also displays a frequency
stability meter (XY Graph) that allows you to analyze each frequency level to ensure proper
selection of frequency levels. The XY graph displays samples with respect to the reference.
The channels reference is in the center of the graph. A variation from the center of the
- NOTE -
THE DEFLECTOMETER®DYNAMICALLY UPDATES AFTER EACH SENSITIVITY
LEVEL CHANGE, ALLOWING CHANGES TO THE SENSITIVITY SETTINGS WHILE
A VEHICLE REMAINS IN THE LOOP DETECTION ZONE.

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graph depicts frequency instability on the channel. Basically a thin smooth graph offers a
more optimum frequency selection over a thick uneven line.
3.2.3 PAIRED CHANNEL MODES
3.2.3.1 3RD CAR MODE
This setting can be enabled by selecting the “3rd Car” option in the “Paired Channels”
menu. When this feature is enabled in one channel, its paired channel is also set to the
same state. In the ORACLE 2E and 2EC models, 3rd Car mode links Channels 1 and 2
together. In the ORACLE 4E, 4EC, and 4H models, 3rd Car mode also links Channels 3 and
4 together When a vehicle is detected on only one of the two linked channels, the channel
with the detected vehicle will enter a pending call state with the DETECT LED flashing 10
times a second and NO call output.
3.2.3.2 DIRECTIONAL LOGIC MODE
This setting can be enabled by selecting the “Direction” option in the “Paired Channels”
menu. When this feature is enabled in one channel, its paired channel is also set to the
same state. In the ORACLE 2E and 2EC models, Channel 1 is paired with Channel 2. In
the ORACLE 4E, 4EC, and 4H models, Channel 3 is also paired with Channel 4.
Directional logic starts with a CALL on one channel. This channel will go into a pending
state with the DETECT LED flashing 10 times a second and NO call output. When both of
the paired channels have detection, the last channel to have detection will output a CALL
until the detection for the last channel ends, even if the detection ends for the first channel
3.2.4 OPERATIONAL MODES
Two operational modes are available, Presence and Pulse. In Presence mode the channel
will produce a call as long as the vehicle is within the detection zone. In Pulse mode, the
channel output will produce a 125 ms pulse for each vehicle that enters the detection zone.
3.2.4.1 PRESENCE MODE
Presence is defined as the maximum period for which the channel will detect a vehicle
within the zone of detection before retuning to the loop and dropping any CALL that may
exist on the channel. Presence mode may be set to Short, Long, or User Defined. If User
Defined is selected, the User Defined Presence time is the next parameter to set, followed
by the time-out mode. If Short or Long is set then the next parameter is Timing. Short
Presence is 30 minutes, Long Presence is 120 minutes.
When the unit is in the Call state, the display will show the value of the Presence timer in
the following format:
Seconds only (ex: 59”) for timer values less than 1 minute
Minutes and Seconds (ex: 99’59”) for timer values of 1 minute to 100 minutes
Hours and Minutes (ex: 17:59”) for timer values of 100 minutes to 18 hours
3.2.4.1.1 USER DEFINED PRESENCE
Each channel may be set to a value between 5 seconds and 96 hours.
3.2.4.1.2 USER DEFINED PRESENCE TIME-OUT MODES
Each channel may be set to either End-of-Green (Grn Ends) or Immediate (Immed). In the
“Grn Ends” mode a detection that remains after the presence time has expired will be reset
at the next end of green (i.e. the next time the Timer Control input goes from ON to OFF. In
the “Immed” time-out mode, a detection that remains after the presence time has expired
will be reset immediately.

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3.2.4.2 TIMING
Each channel may be set to either YES or NO. If YES is selected, then DELAY or EXTEND
times may be entered.
3.2.4.2.1 DELAY
Delay time from 0.1 seconds to 5 minutes may be entered. If a delay time is set then the
output CALL in response to a vehicle entry is delayed for the specified time. If the vehicle
leaves before expiration of the delay, NO CALL is produced. A Timer Control signal input
will inhibit the delay function.
3.2.4.2.2 EXTEND
Extend time from 0.1 seconds to 1 minute may be entered. If an extension time greater
than zero is entered, the output CALL will be extended for the specified time after the
vehicle has left the detection zone. If the extension time is zero the next item to set will be
Vehicle Counting. Note: when pulse mode is enabled, the extension time extends the
length of the pulse being output.
3.2.4.2.2.1 EXTEND TIMING MODE
Extend Always Mode (Always): When a vehicle exits the loop zone and the zone remains
vacant, the extend timer will be enabled and CALL output will be maintained until the timer
times out.
Extend On-Green Mode (OnGreen): The Extend on Green mode extends a call only when
the timer input is active. If this feature is enabled and the Timer Control input is active when
the loop becomes empty after a vehicle exits, then the extend timer will be enabled and the
CALL output will be maintained until the timer times out. If the Timer Control input is
inactive when the loop becomes empty after a vehicle exits, then the extend timer will not
be enabled and the CALL output will be cleared. While the timer is running, the DETECT
LED will flash 4 times a second. If the timer is running and the Timer Control input becomes
inactive, the timer will be disabled and the CALL will be cleared. If the timer is running and
a vehicle is detected, the timer will be disabled and the CALL maintained until the loop
again becomes empty, at which point the extend process repeats its self.
Extend Disconnect (Discnnct): The Disconnect mode disables the output of calls if the loop
is empty for the specified period of time. Disconnect only occurs when the Timer control
input is active. While the Timer Control input is inactive, the Extend/Disconnect timer is not
used and a CALL is output whenever a vehicle is detected. If the Timer Control input is
active and the loop becomes empty after a vehicle exits, then the disconnect timer will be
enabled. While the timer is running, the detect LED will flash 4 times a second. If a vehicle
is detected while the timer is running the disconnect timer will be disabled. If the disconnect
timer times out while the Timer Control input is active, then the CALL output will be
disabled and future detects ignored. When the Timer Control input becomes active, the
CALL output will be enabled again.
Extension plus Disconnect (Ext+Dis):
The Extend plus Disconnect mode generates a call whenever the Timer Control input
becomes active and then disables the call output if the loop is empty for the specified
period of time. While the Timer Control input is inactive, the Extend/Disconnect timer is not
used and a CALL is output whenever a vehicle is detected. When the Timer Control input
becomes active the Extend/Disconnect timer is enabled. While the Extend/Disconnect is
running, the detect LED will flash 4 times a second. If a vehicle is detected while the
Extend/Disconnect is running the Extend/Disconnect timer will be disabled. If the
Extend/Disconnect timer times out while the Timer Control input is active, then the CALL
output will be disabled and future detects ignored. When the Timer Control input becomes
active, the CALL output will be enabled again.

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3.2.5 CHANNEL ID
A five characters ID name can be set to any alphanumeric character A through Z, 0 through
9 or space to custom label each channel of detection. Using the “MENU (Back/Select)”
switch, pressing “Select” causes the cursor to move to the next digit to the right and
pressing “Back” causes the cursor to move to the next digit to the left. To edit each digit,
use the “SCROLL (Up/Down)” switch and press DOWN or UP keys accordingly. Continue
until all of the digits are set and then press the “MENU (Back/Select)” switch down until the
screen highlights OK to confirm and save.
3.3 VEHICLE COUNTING (ORACLE EC SERIES)
Each channel Count Mode may be set to YES or NO. If YES is selected then the “SET UP
Counting Type” and “Enable Count Output” can be set.
3.3.1 COUNTING TYPE (ACCURATECOUNT)
The “Counting type” can be selected to be either on one loop or up to eight loops
connected in series. The “one loop” setting includes all loop configurations, square or
rectangle, where a single loop is connected to the loop inputs. The “Loop Length” setting
should be selected to optimize counting accuracy. A “Short” length is typically considered
as a 6’ long loop. The “Long” length is typically considered as a loop 10’ or greater in
length.
On the two to eight loop setting the Count must be derived from a configuration of individual
loops (6’ x 6’ square or round loops on 12’ to 15’ centers) connected in series within a
single lane. Each vehicle that enters the detection zone will be counted irrespective of
whether vehicles are already present. Accuracy is dependent on the type and volume of
traffic and loop configurations, high long term accuracies are possible.
3.3.2 VEHICLE COUNTING OUTPUT (ACCURATECOUNT)
For the ORACLE 2EC, 4EC models only, the Vehicle Counting output may be set to NO or
YES. If Count Outputs are set to NO then the secondary outputs on the edge card
connector are disabled, Count information will then only be available on the front panel
LCD. If YES is selected, then a secondary output will be produced in addition to the primary
CALL output for every vehicle entering the loop zone. Each vehicle entering the loop will
cause an output pulse of 125ms ± 25ms from the respective secondary “Count” output on
pin S (Channel 1) and pin Y (Channel 2). These pins are typically assigned to Channel 3
and 4 in the rack.
3.4 DISPLAY MODES
Each channel display (view) can be set to either Frequency (Freq), Inductance (Induct), or
Count (2EC, 4EC). This sets the screen that is displayed when the detector starts up or
when RUN is selected.
The Frequency (Freq) view displays the channel ID, sensitivity level, and loop frequency
when there is no vehicle in the loop zone. When a vehicle enters the loop zone, the
channel ID, count down timer (Presence mode only), loop frequency, DEFLECTOMETER®
Pie Graph, Numeric Indicator, and Streaming Graph are displayed and active.
The Inductance (Induct) view displays the channel ID, sensitivity level, and loop inductance
when there is no vehicle in the loop zone. When a vehicle enters the loop zone, the
channel ID, count down timer (Presence mode only), ∆L/L% value, DEFLECTOMETER®
Pie Graph, Numeric Indicator, and Streaming Graph are displayed and active.
The Count view (2EC, 4EC) displays the channel ID and current count accumulated since
the channel was last reset along with the loop frequency. To reset the count accumulator
use the SCROLL (Up) switch.

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NOTE: You can toggle between each of the three (3) views using the SCROLL (Down)
switch at any time during detector operation.
3.5 LOOP FAULT MONITOR
The ORACLE constantly monitors each channel loop(s) and responds to faults in several
ways to allow the operator to pinpoint loop related problems. Three types of loop related
faults can be detected: Open Circuit Loop or loop inductance above rated range, Short
Circuit Loop or loop inductance below rated range, and 25% change from nominal (tuned)
inductance.
When a fault is detected on either channel the ORACLE responds by outputting a detection
CALL. It flashes both DETECT and FAULT LEDs with a flash sequence denoting the type
of fault and also displays the type of fault on the LCD screen. The LED flash sequence is
common with all EDI Loop Monitor products. A single flash for open circuit loops, double
flash for short circuit and a triple flash for a 25% change of inductance.
3.6 EVENT LOG
The ORACLE features a fault log which retains the last twenty-five (25) faults that have
occurred on each channel. From the main menu select “EventLog” to view the Event Logs
menu options. Select “View Log” to view and scroll through the last 25 Events. To review
details of an individual Event, select (highlight) an event and press the “MENU (Select)”
switch. Details including the elapsed time since the Event are displayed. Each time a new
fault is logged the previous logs are moved down one. To clear an individual log or all logs,
go to the Event Log menu and select either “Clear Log” or “Clear All” and respond
appropriately to the next screen.
3.7 SYSTEM MENU
Some global settings are applied in the System menu. To access the System menu press
the Channel 1 MENU and SCROLL switches to the Up position (Back, Up) simultaneously.
3.7.1 RUN MENU ITEM
Selecting the Run item exits the System menu level and returns to the main display.
3.7.2 SYSTEM INFO MENU ITEM
Selecting the SysInfo item displays the firmware revision level, HDLC slot address, and
channel configuration.
3.7.3 TEMPERATURE AND VOLTAGE MENU ITEM
Selecting the Temp,VDC item displays the current temperature and the voltage applied to
the Detector Unit DC Supply (pin B).
3.7.4 LCD DISPLAY HEATER MENU ITEM
Selecting the Heater item displays the state of the front panel LCD display heater. Selecting
Off disables the heater function under all conditions (default). Selecting On will enable the
heater function under the following conditions; the temperature is less than 32 degrees F (0
degrees C), AND any of the front panel switches has been activated. The heater and LCD
backlight will then remain On for 60 minutes following a switch activation.
A “H” character will be displayed next to the DEFLECTOMETER when the LCD heater is
activated.