P/N 889-1907-00 Rev: June 2020 4 Model S-1211 Operating Instructions
bottom of the LCD will be illuminated and the LCD will display
L lo
for low loop inductance and shorted loop situations
or
L hi
for high loop inductance and open loop situations. In addition, the corresponding channel’s LED will begin to emit
a flashing pattern (three flashes per second). If the loop self-heals, the detector and LCD will resume normal operation.
The LED will continue to flash as a means of indicating a prior loop fail condition and will continue to do so until the loop
fail register is cleared.
FIRMWARE VERSION
The firmware version and revision for the detector is displayed. This is a view only parameter. The display alternates
between the model letter and firmware version (example
S34
) and the firmware revision number (example
.00
).
III. How to Reset the Detector:
•
Momentarily press the CHAN pushbutton until the channel to be reset is selected. Press and hold the CHAN pushbutton
continuously for three (3) seconds. After three seconds the channel is reset maintaining all previous settings.
•
Changing the frequency or sensitivity setting will enter the new setting and reset the channel. Changing any of the other
parameters will take effect immediately or on the next detection, but will not reset the detector channel.
Simply
entering the program mode without changing any parameter will not reset the channel.
•
Pressing and holding all four pushbuttons
simultaneously
and continuously for five (5) seconds resets both channels
and also restores the default settings to both channels.
•
Changing the setting of Option 4 (Noise Filter Disable) will reset both detector channels.
•
The detector can be reset by removing and reapplying power.
•
Loop Fail History
is cleared by all reset procedures described above except changing the setting of Option 4 or
changing frequency or sensitivity. Pressing either the
(UP) or
(DOWN) pushbutton while viewing the Loop Fail
History will also clear the Loop Fail History.
IV. Sensitivity Setting:
Sensitivity is controlled by selecting a Sensitivity Level for a channel. The sensitivity numbers 1 through 9 represent
thresholds from the least sensitive to the most sensitive. Setting the proper sensitivity level for the loop circuit provides
stability to the system. If set too high, the detector may detect adjacent traffic. If set too low, the detector may not detect
small vehicles or high bed vehicles.
The LCD includes an eight (8) segment bargraph that is a representation of the relative change of inductance as seen by the
detector. This automatically takes into account loop size, loop inductance, number of loops, number of turns, loop
geometry, lead-in length, etc. The bargraph is a sliding scale that is relative to the programmed Sensitivity Level. The
first (left-most) bargraph segment represents the minimum inductance change necessary for the detector to output a call at
the currently selected sensitivity level. Larger inductance changes will indicate more segments. Each additional segment
indicates that the next sensitivity level has also been met or exceeded. Therefore the bargraph indicates if the sensitivity is
set too high or too low, easily facilitating the ideal setting of the sensitivity level.
The diagram below shows the bargraph with the channel set to Sensitivity Level 6: 0.02% -
Δ
L/L. The bargraph indicates
that the vehicle in the loop zone has exceeded the minimum sensitivity level by an additional five Sensitivity Levels or
0.64% -
Δ
L/L.
The typical vehicle to be detected should cause five or six segments of the bargraph to become filled.
If the typical vehicle to be detected is not creating a five to six segment display on the bargraph, count how many segments
are being displayed and subtract six. If the number is positive, lower the sensitivity that many levels. If the number is
negative, raise the sensitivity that many levels. Example: The detector channel sensitivity is currently programmed at
three (3). The bargraph shows four (4) segments during a typical vehicle detection. Take four (4) (the number of
segments displayed) and subtract six (6) to get minus two (-2). Since the answer is negative, raise the sensitivity level,
currently at three (3), by two (2) to arrive at the desired sensitivity level of five (5).
The bargraph can also be used to take advantage of a direct relationship between the percent change of inductance caused
by a single standard automobile and a small motorcycle in the same loop / lead-in configuration. Adjusting the sensitivity
level for the channel until seven (7) segments of the bargraph are shaded when a standard automobile is present in the loop
zone ensures that the sensitivity has been set to detect a small motorcycle in the same loop zone. If the left most segments
of the bargraph are flickering when vehicles pass in the adjacent lane, the Phase Green Compensation can be turned on to
minimize the effects of adjacent lane detection (see Option 5). The second method of reducing adjacent lane detection is
to reduce the sensitivity level by the number of segments that are flickering, however this will also eliminate the ability to
reliably detect small motorcycles.
Operating Instructions
Model S-1211 Series
Firmware Version 34
T W O C H A N N E L L O O P D E T E C T O R
I.
Factory Default Settings:
Function
Channel 1
Channel 2
Frequency (8 settings)
3
7
Sensitivity (OFF, 1 to 9, CALL)
6
6
Presence / Pulse
Presence
Presence
CALL Delay Time (0 - 255 seconds)
0
0
CALL Extension Time (0 - 25.5 seconds)
0.0
0.0
Max Presence Time (OFF, 1 - 999 seconds)
OFF
OFF
End Of Green
OFF
OFF
Option 1 (Loop Inductance, L)
*
OFF
Option 2 (% Inductance Change, -
∆
L/L)
*
OFF
Option 3 (CALL Extension Time Control)
OFF
OFF
Option 4 (Noise Filter Disable) *
OFF
Option 5 (Phase Green Loop Compensation)
OFF
OFF
Option 6.0 (Display Vehicle Count)
OFF
OFF
Option 6.1 (Reset Vehicle Count)
OFF
OFF
Option 7 (Number of Loops)
04
04
Option 9 (Third Car Passage) **
OFF
Option 10 (Directional Logic) **
OFF
Option 11 (Audible Detect)
OFF
OFF
Option 12 (Detector Disconnect)
OFF
OFF
Detector ID *
000
Notes: * These settings are per unit, not per channel.
** These settings affect two channels.
II. How to View and Program Detector Functions:
•
Enter the PROGRAM mode by momentarily pressing the FUNC pushbutton. Use the FUNC pushbutton to step through
the functions described below.
•
Press the CHAN pushbutton to select the channel to view or make changes to. The channel that is in PROGRAM mode
is indicated by a flashing numbered-loop symbol at the bottom of the LCD.
•
To change a function’s setting or to toggle a function ON or OFF, press the
(UP) or
(DOWN) pushbutton.
•
To exit the PROGRAM mode and return to the NORMAL
mode, press and hold the CHAN pushbutton continuously for
one second.
LOOP FREQUENCY
Press the
(UP) or
(DOWN) pushbutton to change the programmed loop frequency. The filled segment on the
bargraph indicates the setting. The left-most segment represents setting 1 and the right-most segment represents setting 8.
The LCD will display the actual operating frequency of the loop circuit. A separation of at least 5 KHz for adjacent loops,
not connected to the same detector, is recommended.
NOTE:
Changing the frequency will reset the detector channel.
Care should be taken to ensure that the detector channel is not reset while the detection zone is occupied.
SENSITIVITY
Press the
(UP) or
(DOWN) pushbutton to change the programmed sensitivity. The lowest Sensitivity Level is 1 and
the highest Sensitivity Level is 9. The channel can be configured to place a permanent call by selecting CALL (one setting
after Sensitivity Level 9). The channel can be disabled by selecting OFF (one setting before Sensitivity Level 1). If CALL
or OFF is selected, the LCD flashes the message
CALL
or
OFF
during NORMAL DISPLAY mode. See
Section IV
Sensitivity Setting
for instructions on how to use the bargraph to determine the proper sensitivity setting for the loop / lead-
in network connected to the channel.
NOTE:
Changing the sensitivity will reset the detector channel. Care should be
taken to ensure that the detector channel is not reset while the detection zone is occupied.
PRESENCE / PULSE
Pressing either the
(UP) or
(DOWN) pushbutton toggles between PRESENCE and PULSE modes. PRESENCE
mode outputs a call as long as the detection zone is occupied. CALL EXTENSION, CALL DELAY, and MAX
PRESENCE can all modify the operation of the PRESENCE mode. PULSE mode generates a 125 millisecond pulse when
a vehicle is first detected. Only CALL EXTENSION and CALL DELAY modify PULSE mode operation.
Bargraph will slide with the
programmed sensitivity level
Bargraph shown with
sensitivity set to Level 6
(.02%)
(%)-
∆
∆
∆
∆
L/L
.0025 .005
.01
.02
.04
.08
.16
.32
.64
1.28 2.56 5.12
Sens Level
9
8
7
6
5
4
3
2
1
Highest
Lowest
