Reno A & E S-1200 Operations Manual

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Model S-1200 Series

Operations Manual

Two Channel Menu Driven Programmable Inductive Loop

Detector

Built-in Loop Analyzer for Each Channel

This manual contains technical in formation for the

Model S-1200 Series Loop Detector

pn 889-1903-01 Revision: April 2020

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THE FOLLOWING PRODUCT WAS DESIGNED, INSPECTED , TESTED AND

MANUFACTURED IN THE USA BY EBERLE DESIGN, INC. IN PHOENIX, ARIZONA.

INFORMATION CONTAINED HEREIN IS PROPR IETARY TECHNICAL INFORMATION OF EBERLE DESIGN, INC. PUBLICATION, REPRODUCTION OR USE IN WHOLE OR PART IS

NOT PERMITTED EXCEPT UNDER TERMS AGREED UPON IN WRITING. ALL

REGISTERED TRADEMARKS OF EBERLE DESIGN INC. ARE UNDER

IT IS AN EBERLE DESIGN, INC. RECOMMENDATION THAT EACH UNIT BE TESTED

AT LEAST ANNUALLY TO ENSURE COMPLIANCE WITH FACTO RY

SPECIFICATIONS AND MEETS PROPER OPERATIONAL STANDARDS. THE

RESULTS OF THIS TESTING WILL BE DOCU M EN T ED .

MAINTENANCE NOTE

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Model S-1200 Operations Manual

Table of Contents

Section 1 General Description .......................................................................................................... 1

Section 2 General Characteristics .................................................................................................... 3

2.1 Loop Frequency ..................................................................................................................... 3

2.2 Sensitivity .............................................................................................................................. 3

2.3 Presence / Pulse ..................................................................................................................... 3

2.4 Call Delay .............................................................................................................................. 3

2.5 Call Exte ns ion ........................................................................................................................ 3

2.6 Max Presence Timer .............................................................................................................. 3

2.7 End-Of-Green (EOG) ............................................................................................................. 4

2.8 Option 1: Loop Inductance Display ....................................................................................... 4

2.9 Option 2: Loop Inducatnce -∆L/ L Display ............................................................................. 4

2.10 Option 3: Call Ext ension Control ......................................................................................... 4

2.11 Option 4: Noise Filter .......................................................................................................... 4

2.12 Option 5: Phase Green Loop Compensation ........................................................................ 5

2.13 Option 6: Vehicle Counting Display .................................................................................... 5

2.14 Option 7: Vehicle Counting Loop Configuration ................................................................. 5

2.15 Option 9: Third Card Passage .............................................................................................. 6

2.16 Option 10: Direc tional Logic ............................................................................................... 7

2.17 Option 11: Audible Detect Signal ........................................................................................ 7

2.18 Option 12: Detector Disconnect .......................................... Error! Bookmark not defined.

Section 3 Specifications ..................................................................................................................... 9

3.1 Physical .................................................................................................................................. 9

3.2 Electrical ................................................................................................................................ 9

3.3 Operational ............................................................................................................................ 9

3.4 Table: Sensitivity, -∆L/L, and Response Time ..................................................................... 10

3.5 Table: Default Settings ......................................................................................................... 10

3.6 Table: Pin Assignments ....................................................................................................... 11

Section 4 User Interface ....................................................................... Error! Bookmark not defined.

Section 5 Installation and Set-Up ................................................................................................... 12

5.1 Program Mode Display Screens ........................................................................................... 13

5.2 Normal Mode Display Screens ............................................................................................ 17

5.3 Loop Fail Indications ........................................................................................................... 21

5.4 Setting Sensitiviy using the Bargraph .................................................................................. 22

5.5 Setting Sensitivity for Motorcycle Detection using the Bargraph ........................................ 23

5.6 Full Restore to Factory Default Settings .............................................................................. 23

5.7 Display Test ......................................................................................................................... 23

Section 6 Block Diagram ................................................................................................................ 24

Section 7 The o ry of Operation ....................................................................................................... 26

Section 8 Maintenance and Troubleshooting ................................................................................ 27

8.1 Troubles hooting Power Problems ........................................................................................ 27

8.2 Troubleshooting Initialization Problems .............................................................................. 27

8.3 Troubleshooting Loop Fail Problems ................................................................................... 28

8.4 Troubleshooting Intermittent Loop Fail Problems ............................................................... 29

8.5 Troubleshooting Intermittent Detector Lock-Ups ................................................................ 29

8.6 TroubleshootingDelay Problems .......................................................................................... 30

8.7 Things to Know About loops ............................................................................................... 30

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Section 1 General Description

This Operation Manual was written for peop le installing, operating, and maintaining Reno A & E Model S1200 Series inductive loop vehicle detectors. The Model S-1200 is a two channel, shelf mount type, inductive loop vehicle detector designed to meet or exceed NEMA Standards TS 1-1989.

The Model S-1200 incorporates a microco ntroller tha t monito rs and proce sses signals from two sepa rate loop / lead-in circuits and two Phase Green Inputs. The microcontroller uses these inputs to d ete rmine how to control the detector outputs. A Liquid C rysta l Display (LCD), t wo light e mitting diodes ( LEDs), and four front pa nel pushbu tto ns a re us ed t o dis pla y and pr ogra m a ll det ect or funct io ns. Several diagnostic modes are available to aid technicians and service personnel in troubleshooting detectio n proble ms.

The use of a LCD is what distinguishes this detector from that of other manufacturers. It allows more information, never before available, to be displayed to the user d uring normal operation of t he detector. The LCD makes it easy to view and adjust all programmable detector options and settings. It is no longer necessary to check or change detector settings with DIP switches. An eight-segment bargraph at the top of the LCD can be used to provide a graphical represe ntation o f the relative c hange of inducta nce as seen by the detector at the current sensitivity level. The bargraph automatically takes into account loop size, loop inducta nce, number of loops, number of turns, loop geometry, lead-in length, etc. The bargraph functions as a sliding scale that relates 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 indic ate more segments. Each addit ional segment indicates that the ne xt sensitivity level has also been met or exceeded. When used in this manner, the bargraph provides an indication of whether the sensitivity is set too high or too low, fac ilita ting the ideal setting of the sensitivity level.

All programmed settings a re stored in non-volatile memory and ca n only be changed by programming new settings. Loss of power or a detector reset will not change any of the progra mmed settings. If a loop failure occurs, the LCD w i l l displa y t he type of loop fa i l ur e a s L lo (for -25% change or shorted loop conditio ns) or L hi (for +25% change or open loop condit ions). Each loop failure is counted and accumulated in the Loop Failure Memory. The number of loop failures since the last detector reset or power interruption is very useful information to have available during analysis of intermittent loop operation.

The Model S-1200 Series detector is a scanning detector. T he scanning operation sequentially activates the ON and OFF cycle of each channel’s oscillator. Since only one channel’s loop(s) is (are) active at a given time, crosstalk between adjacent loops connected to the same scanning detector is minimized. The Model S-1200 Series’ unique scanning process also disconnects the capacitors and dampens the oscillator during the OFF cycle. This eliminates oscillation past the OFF point (ringing or deca y) every time the loop circ uit is scanned, which can result in crosstalk. When operating in the Program Mode, t he Model S-1200 Series displays the r eal time loop frequency reading for each cha nnel. The eight frequency settings can be incremented or decremented to provide precise frequency readings, removing any guessw ork when cha nging frequ ency settings to eli minate crosstalk. NOTE: Adjacent loops conne cted to different channels of a non-scanning detector or different scanning detectors should be set to different frequencies with maximum separat ion.

The Reno A & E Model S-1200 Serie s uti lizes the fi rst ma jor in nova tion i n induc tive loop detectors since the introduction of digital detecto rs. The pr ogra mming of a ll of t he detect or’s para meters with four nor mally ope n pushbutton switches not only simplifies setup b y removing binary coded DIP switche s, but also increases the reliability of the detector by eliminating the dependence on switch contacts d uring normal operation. The detailed descriptions displayed on the LCD eliminate the interpretation of numerous LED flash rates to determine the detector status. In add ition, the Model S-1200 offers the versatility of software control. Special functions are possible with a simple change of the socket-mounted microprocessor. Special functions are defined as unique options (e.g. Option 6, Option 12, etc.). Special option functions are activated t hrough the use of the LCD menu option programming.

The Model S-1200 Series is comprised of the following detectors:

S-1200-R For NEMA TS 1-1989 app lications calling for a two channel, 120 volt

S-1200-R-12D For NEMA TS 1-1989 applications calling for a two channel, 12 volt

S-1200-R-240A For NEMA TS 1-1989 app lications calling for a two channel, 240 volt

S-1200-SS For NEMA TS 1-1989 app lications calling for a two channel, 120 volt

AC, she lf mo unt d et ec to r w it h re la y out p ut s a nd a n audible detect signal (buzzer).

DC, she lf mo unt d et ec to r w it h re la y out p ut s a nd a n aud ib le d et ec t s ig na l (buzzer).

AC, she lf mo unt d et ec to r w it h re la y out p ut s a nd a n a udib le det ec t s ig na l (buzzer).

AC, shelf mount detector wit h solid state outputs and an a udible detect signal (buzzer).

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S-1200-SS-12D For NEMA TS 1-1989 applications calling for a two channel, 12 volt

S-1201-R For NEMA TS 1-1989 app lications calling for a two channel, 120 volt

S-1201-SS For NEMA TS 1-1989 app lications calling for a two channel, 120 volt

DC, shelf mount detector wit h solid state outputs and an a udible detect signal (buzzer).

AC, shelf mount detector wit h True Count

outp uts , re la y outp uts , a nd

an audible detect signal (buzzer).

AC, shelf mount detector wit h True Co unt

outputs, solid state outputs,

and an audible detect signal (buzzer ).

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Section 2 General Characteristics

2.1 LOOP FREQUENCY

There are eight (8) selectable loop frequency settings (normally in the range of 20 to 100 kilohertz) per channel. The actual loop operating freq ue ncy is a function of the loop / lead-in network and the components of the loop oscillator circuit. The digita l display of the actual loop operating frequency for each setting makes it easy to quickly identify a nd eli minate cross talk in the most diffic ult to co nfigure intersecti ons . T he fr eq ue nc y display is typically very stable when the loop is vacant and vehicles are not passing nearby the loops. If the readi ng is vary i ng by more than ±1 in the last digit, this is an indicatio n of poss ible cros s talk betwee n loops.

2.2 SENSITIVITY

There are nine (9) selectable sensitivity levels per channel, plus Continuous-Call and Channel-Off. The sensitivity levels are designed so that a one level increase actually d oubles the sensitivity and a one level decrease halves the sensitivity. A unique bargraph displayed on the LCD makes it easy to quickly set sensitivity at the ideal level for any loop / lead-in network configuration. (See Section 3.4 for actual detection levels at eac h sensitivity level. )

ONTINUOUS-CALL: When set to t he Continuous-Call state, t he channel output is continuous ly in the Call

state regardless of the presence or absence of vehicles over the loop. The loop oscillator is disabled when in the Cont inuous -Call state. This state is indicated b y CALL flashing on the LCD. Th is optio n is se lecte d from the Sensitivity menu in Program Mode and is useful for checking controller response and other troubleshooting activities.

HANNEL-OFF: When s et to the C han nel-O ff state, the channel outp ut is continuously in t he No Call state

regardless of the presence or absence of vehicles over the loop. The loop oscillator is disabled when in the Channel-Off State. This state is indicated by OFF flashing o n the LCD. This opt ion is selected fro m the Sensitivity menu in Program Mode a nd is useful for checking co ntroller respo nse and other tro ubleshootin g activities.

2.3 PRESENCE / PULSE

One of two mutually exclusive modes of operation for each channel is available. Presence or Pulse mode is toggled by momentarily pressing e ither the  (UP) or  (DOWN) button.

RESENCE MODE: Provides a call hold time of at least four minutes (regardless of vehicle size) and typically

one to three hours for an automobile or truck. P

ULSE MODE: An output Pulse of 125 ±10 milliseconds duration is generated for each vehicle entering the

loop detection zone. Each detected vehicle is instantly tuned out if it remains in the loop detection zone longer than two seconds. This enables de tection of subsequent vehicles entering the loop dete ction zone. After each vehicle leaves the loop detection zone, the channel resumes full sensitivity within 0.5 seconds.

2.4 CALL DELAY

Each channel’s Call Delay is adjustable from 0 to 255 seco nds in one-second steps. Call Delay time s tarts counting down when a vehicle enters the loop dete ctio n zone. The remaining C all D elay time is continuo usly displayed on the LCD. Whene ver a Pha se Green Input (Call Delay Ove rride) signal (pin J o f the MS c onnector of channel 1 or 2) is active, the Call Delay function for the channel is aborted and the Call De lay time is fo r ce d to zero.

2.5 CALL EXTENSION

Each channel’s Call Extension is adjustable from 0 to 25.5 seconds in 0.1-second ste ps. Extension time starts count ing down when the last ve hicle c lears t he loop detecti on zone. The re mainin g Call E xtensio n time is continuously displayed on the LCD. Any vehicle e ntering the loop detection zo ne during the Call E xtension time period causes the channel to return to the Detect state, and later, when the last vehicle clears the loop detection zone, the full Call Extension ti me starts count ing down again. (See Option 3, Call Extension C ontrol, for an a lternate mode of operation for C all Exte nsion.)

2.6 MAX PRESENCE TIMER

When activated, each channel’s Max Presence time r is adjustable from 1 to 999 seconds in one-second steps. A setting of OFF turns the Max Presence timer off. The Max Presence function is used to limit presence time, by automatically resetting the channel. If this function is enabled (ON), the Max Presence timer begins

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counting down when a call is initiated and the remaining ti me is continuously displayed on the LCD. If the loop becomes vacant before the Max Presence timer reaches zero, the call is dropped and no automatic reset occurs. If the End-Of-Green (EOG) function is not enabled (OFF) and the call is s til l pres ent w hen the M ax Presence timer reaches zero, the channel then is automatically reset. If the EOG function is enabled (ON) and the call is still present when the Max Presence time r reaches zero, the channel enters a Wait state. The Wait state continues until either the loop becomes vacant or the Phase Green Input signal for a channel (pin J of the MS connector) transitions fro m green to not green with the call still prese nt. If the loop becomes vaca nt first, the call is dropped and no auto matic reset occurs. If the Phase G ree n Input trans itions from green to not green while a channel is in a Wait state, the channel is automatically reset. The signals on pin J of the MS connectors of channels 1 and 2 are also called Call Delay Overrides. (See Section 3.2, Phase Green Input specification for volta ge le ve ls . )

2.7 END-OF-GREEN (EOG)

Each c hannel’s EOG setti ng can be to ggled O N or OFF by momentar ily press ing eithe r the  (U P) or  (DOWN) button. The EOG function is used to synchro nize resetting of a detector with the termination of the associated phase green. The assumption is that this is the safest point in time to reset the channel. This assumption is based on the premise that at the termination of the associated phase green, traffic should be moving, and therefore, a reset would not result in the loss of a call when traffic comes to rest ove r the loop(s). The EOG function is only available when the Max Presence function is set between 1 and 999 seconds. It is not ava ila ble w he n the Ma x Pre se nce func tio n is OFF. Whe n t he EO G fu nct ion is e nab led (ON ), t he c hanne l will automatically be reset at the same time the Phase Green Input signal (pin J of the MS connector) transitions from the ON state to the OFF state, if the Max Presence Time has counted down to zero and is resting in the wait state. The signals on pin J of the MS connectors of channels 1 and 2 are also called Ca ll Delay Override. (See Section 3.2, Phase G reen Input specifications for voltage levels.)

2.8 OPTION 1: LOOP INDUCTANCE DISPLAY

Each channel’s Loo p I nductanc e D is p la y s e t t i ng c a n b e t o g g led O N o r OFF by mo mentari l y pr es sing eit her the  (UP) or  (DOWN) button. When this opt ion is e nabled (ON ), the LCD displays the tota l loop ind uctance (actual loop inductance plus actual lead-in inducta nce) i n mic ro henr ies f or lo op ind uc tanc e va lues in the ran ge of 20 to 2500 microhenries. By recording the inductance of the loop / lead-in circuit when it is first insta lled, the actual inductance can be compared to the expected inductance to help identify defective loop / lead-in circuits. Loop / lead-in inductance can be easily estimated using the simple formulas included in Section 8.7 of this manual. NOTE: Enabling t his option activates it for bot h channe ls. This optio n is auto matically disabled 15 minutes after activation or on loss of power.

2.9 OPTION 2: LOOP INDUCTANCE -∆L/L DISPLAY

Each cha nnel’ s Loop I nducta nce -∆L/L Display setting can be toggled ON or OFF by momentarily pressing either the  (UP) or  ( D O W N) button. W he n t h is o pt ion is enab led (ON), t he LCD d isplays t he perce ntage of induc t a nc e c hange (-∆ L/L value) during the Call state. To fac ilitate t he view ing of the maximu m amo unt of change in the -∆L/L value while traffic is in motion over the detection zone, the channel holds the peak -∆L/L value for a period of two seconds. NOTE: Enabling this option activates it for both channels. This option is automatically disabled 15 minutes after activation or on loss of power.

2.10 OPTION 3: CA L L EXTENSION CONTROL

Each channel’s Call Extens ion Co ntro l set ting ca n be t oggl ed ON or OF F by mo me ntar ily pr essi ng ei ther t he  (UP) or  (DOWN) button. Whe n this optio n is enable d (ON), the c hannel wi ll extend ca lls for the progra mmed ext ensio n time only when the Phase Gre en Inp ut signa l (pin J of the MS connector) is active. When th is opt ion is OF F, the channe l ex tend s ALL cal ls for t he pr ogra mmed exte nsio n time . The s igna ls o n pin J of the MS connectors of channels 1 and 2 are also called Call Delay Overrides. (See Sect ion 3.2, Phase Green Input specifications for voltage levels.)

2.11 OPTION 4: NOISE FILTER DISABLE

The detector’s Noise Filter Disab le setting can be toggled O N or OFF by mo mentarily pressing either the  (UP) or  (DOWN) button. When Option 4 is enable d (ON), internal noise filtering is disabled thus providing a faster response time. When this option is OFF, internal noise filtering is utilized. When the detector is used in speed and/or occupancy applicatio ns, the noise filter should be disabled ( i.e. Option 4 ON) to provide the most accurate data possible. It is recomme nded that this option not be activated. The factory default setting of OFF provides stable operation in high cross talk environments. NOTE: Enabling this option activates it for both channels. Changing the setting of this feature will reset both detector channels.

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The Loop Fail Count is not reset w he n t he setting of Option 4 is changed. Also, changing the setting of Option 4 will not cause the prior Loop Fail indication to cease (see Section 5.3, Loop Fail Indications).

2.12 OPTION 5: PHASE GREEN LOOP COMPENSATION

Each channel’s Phase Green Loop Co mpensation setting ca n be toggled ON or O FF by momentarily p ressing either the  (UP) or  (D O WN ) b ut to n. Whe n O pt io n 5 is e nab le d (O N ), no rma l loo p c o mpe ns at io n is us ed until the Phase Green Input signal (pin J of the MS connector) becomes active. Once the Phase Green Input signal is active, the channel desensitizes the loop. Maximum desensitization is 0.05% (-∆L/L). This desens it iza t io n tu nes o ut s ma ll cha n ges , s uc h as adjacent lane pickup, therefore minimizing the chance of max timing an empty lane. Note: A small motorcycle may also be tuned out in a short period of time following the start of Phase Green. This option is useful in minimizing false detect ion resulting from adjacent lane pickup when a c ha nne l mu st be ru n w ith a h igh s ens it iv it y se tt in g. W he n Op t ion 5 is no t ena b led ( O FF ), no r ma l lo op compensation is use d.

2.13 OPTION 6: VEHICLE COUNTING DISPLAY

Option 6 has two parameters, Option 6.0 and Option 6.1.

When Option 6.0 is enabled (ON) for a c hannel, the normal operating display for that channel is replaced with the accumulated vehicle count. The unit is capable of accumulating 65,535 vehicle counts before rolling over to zero. T he display will s how the hundreds, tens, and ones d igits until the accumulated co unt exceeds 999. At this point t he disp lay will a lternate betwee n the ten tho usands a nd thousa nds d igits a nd the remaining three digits for hundreds, tens, and ones.

When the detector is first powered up, the detector enters a training mode. Operation in the training mode is indicated by the accumulated vehicle co unt flashing on the LCD. Training mode enables the detector to identify what degree of inductance change a typical vehicle causes as it is detected. When the training period is complete, the flashing display of the accumulated vehicle count on the LCD will cease and the LCD will show the actual accumulated vehicle count. The most accurate vehicle counts are obtained once the detector is operating in this mode, i.e. after the training period is complete.

Option 6.1 is used to reset the accumulated vehicle co unt for the selected channel. When Option 6.1 is changed from the OFF state to the ON state, the accumulated vehicle count for the selected channel is reset to zero. Option 6.1 will always be in the OFF state when first viewed. The accumulated vehicle count is also cleared by loss of power.

2.14 OPTION 7: VEHICLE COUNTING LOOP CONFIGURATION

This feature is only available on the True CountTM version of the Mod el S-1200 detector (S-1201). The detector’s Vehicle Counting Loop Configuration se tt ing ca n be set fro m 01 to 04 for each channel. This setting should indicate the number of loops installed in a single lane. The setting 01 would indicate a single loop.

This could be a single 6 ΄ x 6΄ or a long loop such as a 6΄ x 50΄ Quadrupole indicate the number of 6΄ x 6΄ loops installed in a single lane of traffic.

Several factors can influence the accuracy achieved with this detector:

1. Lanes per Detector - The detector was designed to be used in applications where each channel is used to

count vehicles in a single lane o f traffic. It is not intended to be used in applications where it is necessary to count cars across multiple lanes of traffic.

2. Loop Geometry - In t he mu l t iple loo p s e t t i n gs (02-04), all l oops must be of the same configuration, i.e.

the same number of turns a nd t he same size. Also, all loops must be equally spaced. The idea l spac ing for 6 ft. by 6 ft. loops is 15 ft. center to center or 9 ft. spacing between loop edges. Further, multiple loops should always be wired in a ser ies network. This is important to e nsure that a vehicle passing over the group of loops causes the sa me amount of ind uctance change in e ach loop. I n the single loop setting (01), square or rectangular co nfigurations will give slightly better results than Quadrupo le configurations.

3. Loop Placement - Loops should always be placed in the center of the traveled lane. Loops should

extend out in front o f the stop bar. For t urning move ments, loops should not e xtend so far out in front of the s to p bar that exitin g vehicles w o u ld e x it mo re out of t he side of t he lo o p t ha n out the f ro nt o f t he loop. If the detector is operating in the multiple loop mode and other move ments of traffic c lipping the front edge of the loop are a concern, the detector will only count vehicles that cross more than one loop. It will ignore all vehicles that clip a single loop.

4. Sensitivity Setting - The se nsitivit y should be set so that a single pass enger vehicle in the detection

zone creates a seven dot deflection on the bargraph on the LCD.

. The remaining three settings

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Loop B

Loop A

Whenever the detector is powered up, the sensitivity is changed, or the loop configuration is changed, the detector will enter the tra ining mode. While in this mode, the detector is evaluating individual vehicles passing through the detection zone. T his means that no other vehicle can occupy any part of the detection zone while a vehicle passes through. The detector will accumulate counts during the training period. Optimal count accuracy will occur after the tra ining period is complete. Depending on traffic density a nd the length of detection zone, this training period could take many hours. We recommend installing the detector the day before actual vehicle cou nts are to be co llected. This w ill allow s ufficient time for the detecto r to train itse lf. The training period is necessary to ensure that the detector can adjust itself to the exact particulars of a given loop installation.

The vehicle counting feature cannot be turned off and is active regardless of any other features that have been enabled. Even if other features (Delay, Third Car Passage, Directio nal Logic, or Detector Disconnect) would cause the normal detector output to be in the No Call state, the vehicle counting feature will still operate correctly.

2.15 OPTION 9: THIRD CAR PASSAGE

Each channel’s Third Car Passage setting can be toggled ON or OFF by momentarily pressing either the  (UP) or  (DOWN) button. Option 9 is a paired channel option. This means that it takes two channels to implement the feature. Therefore, when this option is toggled ON or OFF in one channel, its paired channel is also set to the same state. In the Model S-1200, Channel 1 is paired with C hanne l 2. NO TE: Opt ion 9 is mutua lly exclusive with Option 10. Turning ON one option will automatically turn OFF the other option.

When Op tion 9 is enab led (ON ), the o utput o f the tw o paire d chan nels ar e logica lly AN Ded to gether . This means t hat while the loops for both o f the paired c hanne ls are occ upied, a ca ll will be outp ut on both c hannels. While only one channel is occupied, or neither channe l is occupied, a call will not be outp ut for either channe l. The firs t channel w ith detecti on will e nter a pending state while waiting for detection on the other paired channel. While in the pending state, the LCD w ill s how Pnd on the display.

This feature is intended to be used in Protected / Permissive left tur n situations. The expected insta llation is a stop bar loop for the left turn lane connect ed to one channel, a queue detect ion loop (with a small amount o f delay t ime pro gra mmed ) fo r the lef t tur n la ne c onne cte d to t he o the r cha nne l, a nd t he o utpu t o f eit her c han ne l connected to the Vehicle Call input for the protected movement of the traffic controller.

Basic Insta llatio n - Loop A is the Queue Detection loop and Loop B is the Stop Bar loop.

Car enters Loop A - No ca ll is o utp ut.

Car proceeds to Loop B - No call is output.

Additional cars enter the left turn lane - When the back of the queue reaches Loop A while a car is s till over Loop B, a call will be output.

When T hird C ar Pa ssage is t urned o n, a s the first vehic le e nters the le ft tu rn la ne it will d rive o ver the q ueue detection loop. Since there is no vehicle over the stop bar loop, there is no call output gene rated. The vehicle advances to the stop bar loop. Still, no output is generated because there is no vehicle over t he queue detection loop. If the vehic le tra ffi c in t he left t urn lane backs up to the que ue detect ion loop, then t he stop bar loop a nd the queue detection loop will both be occupied at the same time. This will cause the detector to generate a call to the traffic controller to service the protected movement for the le ft t u r n. T his should help clea r t he q ueue of vehicles in the left turn lane. 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 de la y t ime o n the Queue Detection loop should be sufficiently long that vehic les driving over this loop t o enter the queue do not generate a call.

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Loop B

Loop A

Basic Ins tallat ion

Car enters Loop A - No call is output

Car proceeds to Loop B

Car proceeds to Loop A

2.16 OPTION 10: DIRECTIONAL LOGIC

Each channel’s Directional Logic setting can be toggled ON or OFF by moment arily pr essing e ither t he  (UP) or  (DOWN) button. Option 10 is a paired c hannel option. This mea ns that it takes two channels to implement the feature. Therefore, when this option is toggled ON or OFF in one channel, its paired channel is also set to the same state. In the Model S-1200, Channel 1 is paired with Channel 2. NO TE: Option 10 is mutua lly exclusive with Option 9. Tur ning ON one option will automatically turn OFF the other option.

When Op t io n 10 is e nab le d ( ON ), d ire ct io na l l o gic is enabled. Directional logic starts with a detection on one channel. This channel will go into the pending state, display Pnd on the LCD, and N OT outp ut a call. Whe n both of the paired cha nnels have de tection, the last c hannel to ha ve detection will output a call until the detection for the last channel ends, even if the detection ends for the first channel. None of the timing functions of the first channel with a detection will time (Delay, Extension, Max Presence, and Detector Disconnect) and the first channel will always operate in the Presence Mode regardless of the programming of the channel.

This feature is intended to be used in parking lot applicat ions where vehicles can enter or exit from the sa me lane, freeway r amps f or wron g way det ection, and le ft turn lanes whe re ot her move ments i n the inte rsec tion tend to clip the detection zone of the left turn lane. The expected installation is two loops, one after the other in the same lane, spaced anywhere from slightly overlapping to 6 feet apart. NOTE: Contact a Field Engineer at Reno A & E regarding proper loop configurations and spacing for specific app licati ons.

When D irect iona l Det ect ion is tur ned o n, a ve hic le e nteri ng the firs t lo op wi ll ca use that c han nel t o ente r the pending state. As the vehicle enters the se cond loop while still occupying the first loop, the second channel will enter the Call state w hile the first cha nnel rema ins in the pe nding state. A call is neve r output on t he first channel with a detection. Under normal conditions both outputs can never be on at the s ame time. However, if one of the loops fail, both outputs will come on and stay on until the failure is corrected.

Call is output o n C hannel B

2.17 OPTION 11, AUDIBLE DETECT SIGNA L

Each channel’s, Audible Detect Signal setting can be toggled ON or OFF by momentarily pressing either the  (UP) or  (DOWN) button. Only one channel can be t urned ON at a time. Turning this opt ion ON for one channe l a ut oma t ica ll y t urns i t O FF f or t he ot he r c ha nne l. Whe n t his op t io n is ena bl e d (O N), a n a ud ible s ig nal will be activated whenever the detection zone for the selected channel is occupied. The audible signal indicates actual o ccupa ncy o f the lo op det ectio n zone. Timin g and d isco nnect functi ons ha ve no e ffect o n the a udible signal. This feature allows a technic ian to watch the detection zone on the street and confirm correct detector operation without having to look at the det ector d isplay as w ell. NOTE: This o ption is auto matically disab led 15 minutes after activation or on loss of power.

2.18 OPTION 12: DETECTOR DISCONNECT

Each channel’s Detector Disconnect setting can be toggled ON or OFF and the Extension timer toggled betwee n ON and OFF by moment arily press ing either the  (UP) or  (DOWN) button. The Detector Disconnect feature requires that the P hase Green Input for the channel be connected to the proper controller phase. Whe n the Phas e G ree n Inp ut is not ac tive, the c ha nne l sha ll op era te no rma ll y. W hen t he Pha se G ree n Input is active, the extens ion timer will start to c ount down at the end of each de tection. If this timer reaches zero be fore the ne xt detectio n, this cha nnel will no l onger outp ut a call unt il the Phase Green Inp ut is not active. Since the extension timer is used as a disconnect timer while in this mode, two diffe rent disconnect types are available:

889-1903-01 Model S-1200 Operations Manual Page 7 of 28

Car enters Loop B - No cal l

Call is output o n C hannel A

Page 14

ion Zone

Phase Green

Output w/ 12.1 Off

Output w/ 12.1 On

This example assumes an extension time of 2 seconds. The dott ed lines show where disconnect would occur.

Seconds 0 5 10 15 20 25 30 35 40 45 50 55

Option 12.1 OFF: Extension timing still oc curs and the extension timer is a lso the disconnect ti mer during phase green. This w ill cause the ca ll output to re main in the Ca ll state until disco nnect occurs. This may allow t he us e r to us e ga p t imes appropriate for the advance loops witho ut consider ing the e ffects on t he stop bar loops.

Optio n 12.1 ON: Exte nsion t i mi n g is disa b le d and the e xt ension t i me r is us e d a s t he disconne c t t i mer. Th is will cause the call output to follow the occupation of the loop detection zone until disconnect occurs.

This feature is intended to be used in applications where a loop at the stop bar is not needed after any waiting queue in the associated traffic lane is moving during the green phase. The expected insta llation is a stop bar

loop (typically a 20΄ to 30΄ long detection zone) and an advance detection loop (typically a 6΄ long detection

Detect

Phase Green is the state of the light (actual Phase Green Input is i nv er ted).

zone) for a single traffic lane. This feature pro vides a means for keeping the stop bar loop from placing ca lls to the traffic controller a fter the stop bar loop has served its intended purpose d uring the beginning period of the associated green phase. The channel connected to the stop bar loop would have the Detector Disconnect feature turned ON and have a programmed extension time tha t functions as the disconnect time. The channel connected to the advance detection loop would be programmed as normal.

When the D e t e c to r Discon nec t fe a t ure is t u r ned O N a nd t he s i g na l is no t gre e n, the cha nnel outp ut s calls to t he traffic contro ller as usual. When the signal turns green, vehicles begin to move and eventually the stop bar detection zone is cleared. At the time that the stop bar detection zone is cleared the disconnect timer begins to count down. If another vehicle e nters the s top bar detection zone before the disconnect timer reaches zero, the channel outputs the new call to the traffic controller and the disconnect timer is reset to its initial value. Once the stop bar detection zone remains clear for a time equal to the programmed disconnect time, the detector channel is disabled a nd will not generate any further ca lls to the traffic controller until after the green has terminated. When the stop bar detect ion loop is disabled, the green p hase can only be extended by ve hicles detected by the advance detection loop. NOTE: The disconnect timer will always time an initial gap each time that the phase turns green. If Opt ion 12.1 is OFF, the channel will generate a n output for the specified extension time at the start of each green phase.

889-1903-01 Model S-1200 Operations Manual Page 8 of 28

Page 15

Section 3 Specifications

3.1 PHYSICAL

WEIGHT: 34 oz. (963.9 gm). S

IZE: 6.45 inches (16.38 c m) high x 2.50 inches (6.35 c m) wide x 6.35 inches (16.13 c m) deep (excluding

connectors). Connectors add .675 inch (1.71 cm) to depth measurement. O

PERATING TEMPERATURE: -40° F to +180° F (-40° C to +82° C).

IRCUIT BOARD: Printed circuit boards a re 0.062 inch t hick FR4 material w ith 2 oz. c opper on both s ides and

plated through holes. Circuit board and components are conformal coated with polyure thane. C

ONNECTOR: Two (2) MS3102A-18-1P. See Section 3.6 for pin assignments.

3.2 ELECTRICAL

POWER: 89 to 135 VAC, 50/60 Hz, 6 Wat ts maximum (120 volt AC models). 180 to 270 V AC, 50/60 Hz, 6 Watts maximum (240 volt AC models). 9.6 to 14.4 VDC, 250 mA maximum, 3.8 Watts maximum (12 volt DC models).

OOP INDUCTANCE RANGE: 20 to 2500 micro henries w ith a Q factor of 5 or greater.

OOP INPUTS: Transformer isolated. The minimum capacitance added is 0.068 microfarad.

IGHTNING PROTECTION: Meets and/or exceeds all applicable NEMA TS 1-1989 specifica tions for transient

voltage protection. R

ESET: Meets and/or exceeds NEMA TS 1-1989 detector specifications. The detector can be reset by

removing and reapplying power or by changing the setting o f Option 4 (Noise Filter Disable). Each detector channel can be independently reset by pressing the CHAN butto n until the desired channel is se lected, then pressing and holding the CHAN button for three seconds. Also, changing either the sensitivity or loop frequency of a channe l will reset that channel.

HASE GREEN INPUTS: Also known as Call De lay Overrides. Meets and/or exceeds all NEMA TS 1-1989

requirements. Application of a high state voltage (89 to 135 VAC) to pin J of the MS connector of channel 1 or 2 causes the delay timer for the channel to abort the delay timing functio n and also pro vides control for Pha se Green Loop Compensation, Max Presence Timing (End-of-Green), Extension Timing, and Detector Disconnect, if the features are progra mmed .

ELAY RATING: The relay contacts are rated for 6 Amps maximu m, 150 VDC maximum, and 180 Watts

maximum switched power. S

OLID STATE OUTPUT RATING: Optically isolated. 30 VDC maximum collector (drain) to emitter (source).

100 mA ma xi mu m s at ur at io n c urr e nt. 2 V D C max imu m tra ns is to r s a tur at io n v o lta ge. The output is protected with a 3 3-volt Zener diode connected between the collector (drain) and emitter (s o urc e).

3.3 OPERATIONAL

DISPLAY: The LCD backlighting illuminates whenever any pushbutton is p ressed. The backlighting will extinguish 15 minutes after the last pushbutton pre ss.

ETECT INDICATOR: Each channel has a super bright, high intens ity, red light emitting diode (LED) to ind icate

a Call Output, Delay Timing, Extens ion Timing, Pending State, or Failed Loop condition. R

ESPONSE TIME: Meets or exceeds NEMA TS 1-1989 response time specifications. (See Sectio n 3.4 for actual

response times.) S

ELF-TUNING: The detector automatically tunes and is operational within two seconds after application of

power or after being reset. Full sensitivity and hold time require 30 seconds of operation. E

NVIRONMENTAL & TRACKING: The detector is fully se lf-compensating for environmental changes and loop

drift o ver the f ull temperature r ange and the ent ir e loop inductance range. G

ROUNDED LOOP OPERATION: The loop isolation transformer allows operation with poor quality loops (w hich

may include one short to ground at a single point). L

OOP FEEDER LENGTH: Up to 5000 feet (1500 m) maximum with proper feeder cable and appropriate loops.

889-1903-01 Model S-1200 Operations Manual Page 9 of 28

Page 16

Respons e Time

(Option 4 O FF)

Respons e Time

(Option 4 ON)

OFF

-------

0.64%

133 ±27 ms

20 ±4 ms

0.32%

133 ±27 ms

20 ±4 ms

0.16%

133 ±27 ms

20 ±4 ms

0.08%

133 ±27 ms

20 ±4 ms

0.04%

133 ±27 ms

20 ±4 ms

0.02%

133 ±27 ms

27 ±5 ms

0.01%

133 ±27 ms

42 ±8 ms

0.005%

133 ±27 ms

72 ±14 ms

0.0025%

133 ±27 ms

CALL

-------

it by two, then add these times together.

Function

Channel 1

Channel 2

Frequency 3 7

Sensitivity 6 6

Delay Time 0 0

Extens ion Time 0 0

Max Presence Time

OFF

Presence / Pulse Mode

Presence

EOG

OFF

Option 1 - Loop Inductance Display

OFF

Option 2 - Loop Inductance -∆L/L Display

OFF

Option 3 - Call Extension Control

OFF

Option 4 - Noise Filt er Disable

OFF

Option 5 - Phase Green Loop Compensation

OFF

Option 6.0 - Display Vehicle Co u nt

OFF

Option 6.1 - Reset Vehicle Count

OFF

Option 7 - Number of Loops

Option 9 - Third Car Passage

OFF

Option 10 - Dire c tional Logic

OFF

Option 11 - Audible Detect Signal

OFF

Option 12.0 - Detector Disconnect

OFF

Option 12.1 - Detector Disconnect Type

OFF

LOOP (FAIL) MONITOR: If the total inductance o f the channe l’s loop inp ut network goes out of t he range specified for the detector, or rapidly change s by more than ±25 %, the channel will immediate ly enter the FailSafe mode and display LOOP FAIL on the LCD. The type of loop failure will a ls o b e d is played a s L lo (for 25% change or shorted loop conditions) or L hi (for +25% change or open loop conditions). This will continue as long as the loop fault exists. However, if the detector is reset, or power is momentarily lost, the detector

will retune if the loop inductance is within the acceptable range. If any type of loop failure occurs in one (or more) loop(s) in a group of two or more loops wired in parallel, the detector will not respond with a Fail-Safe output f ol lowing any type of reset. It is essential that m ultiple loops wired to a common detector channel always be wired in series to ensure Fail-Safe operation under all circumstances. At the

time of a loop failure, the channel’s LED will begin to flash at a rate of three flashes per second. The LED will continue this display pattern unt il t he channel is manually reset or power is removed. If the loop self-heals, the LOOP FAIL message on the LCD will e xtinguis h and the c hannel will res ume operation in a normal manner; except the LED will continue the three flashes per s econd display pattern, thus providing an alert that a prior Loop Fail condition has occurred. Each loop failure for the channel is counted and accumulated into the Loop Fail Memory. The total number of loop failures written into the Loop Fail Memory (since the last power interruption or manual reset) is viewed by stepping through the cha nnel’s functions in Progra m Mode until the LOOP FAIL messa ge is displayed.

3.4 TABLE: SENSITIVITY, -∆L/L, AND RESPONSE TIME

Sensitivity -ΔL/L

NOTE: Entries in this table are based on the assumption that both channels are set to the same sensitivity. To approximate response time for a detector with the channels set to different sensitivities, look up the response time for each channel and divide

Noise Filter Enabled

Noise Filter Disabled

3.5 TABLE: DEFAULT SETTINGS

889-1903-01 Model S-1200 Operations Manual Page 10 of 28

Page 17

Function

Power, Neutral, 120 / 240 VAC (AC Models) 12 VDC Common (DC Models)

Channel 1 Output, Relay Common

B Channel 2 Output, Relay Common

Power, Line, 120 / 240 VAC (AC Models) +12 VDC (DC Models)

Channel 1 Loop Input

D Channel 2 Loop Input

Channel 1 Loop Input

E Channel 2 Loop Input

Channel 1 Output, Relay Normally Open

F Channel 2 Output, Relay Normally Open

Channel 1 Output, Relay Normally Closed

Channel 1 Output, Relay Normally Open

Channel 2 Output, Relay Normally Closed

Channel 2 Output, Relay Normally Open

Chassis Ground

H Chassis Ground

No Connection

Channel 1 Output, Relay Common

No Connection

Channel 2 Output, Relay Common

Channel 1 Phase Green Input (Delay Override)

J Channel 2 Phase Green Input (Delay Override)

NOTE: Relay contact states are shown with power applied, loop(s) connected, and no vehicle(s) present.

Function

Power, Neutral, 120 / 240 VAC (AC Models) 12 VDC Common (DC Models)

Channel 1 Output, Emitter (Source)

B Channel 2 Output, Emitter (Source)

Power, Line, 120 / 240 VAC (AC Models) +12 VDC (DC Models)

Channel 1 Loop Input

D Channel 2 Loop Input

Channel 1 Loop Input

E Channel 2 Loop Input

Channel 1 Output, Collector (Drain)

F Channel 2 Output, Collector (Drain)

No Connection

Channel 1 Output, Collector (Drain)

G No Connection

Channel 2 Output, Collector (Drain)

Chassis Ground

H Chassis Ground

No Connection

Channel 1 Output, Emitter ( Source)

I No Connection

Channel 2 Output, Emitter ( Source)

Channel 1 Phase Green Input (Delay Override)

J Channel 2 Phase Green Input (Delay Override)

3.6 TABLE: PIN ASSIGNMENTS

RELAY OUTPUTS C

HANNEL 1 CONNECTOR CHANNEL 2 CONNECTOR

Model 1201 - True CountTM

A No Connect ion

C No Connection

Model 1201 - True CountTM

SOLID STATE OUTPUTS C

HANNEL 1 CONNECTOR CHANNEL 2 CONNECTOR

Model 1201 - True CountTM

A No Connection

C No Connection

Model 1201 - True CountTM

889-1903-01 Model S-1200 Operations Manual Page 11 of 28

Page 18

FUNC

CHAN

CHANNEL

MODEL S

VEHICLE DETECTOR

CH 1

CH 2

-∆L/L

FREQ

LOOP FAIL

OPTIO

MAX

OFEOSCANNI

EXTENSION

SENSITIVITY

DELA

PULS

SECONDS

Seven Segment Display

Vehicle Count

Parameter Description

Function Select Pushbutton

Channel Select Pushbutton

Press and Hold for Three UP Pushbutton

Bargraph

Numbered Loop Symbols

LED Indicators

DOWN Pushbutton

MODEL S-1200

Section 4 User Interface

• Vehicle Signal Strength

• Frequency Setting

• Parameter Values

• Timer Countdown

• Frequency Reading

• Inductance Value

• -∆L/L Value

• Pending Call State

• Type of Loop Failure

• L hi = Open Loop or L

High

• L lo = Shorted Loop or L Low

•

• Name of Parameter

• Timer in Operation

• Channel Displayed

• Flashing = Program Mode

• Call

• Delay Time in Progress

• Extension Time in Progress

• Pending Call State

• Loop Fault has Occurred

• Change Displayed Channel

Press and Release

• Exit Program Mode Press and Hold for One Second

• RESET Channel

Seconds

• Press Momentarily to Enter Program Mode and to Step Through Parameters

• Increments Values

• Toggles ON and OFF

• Decrements Values

• Toggles ON and OFF

NOTE: There are no internal switches or jumpers to set.

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Page 19

FREQ KHZ

SENSITIVITY

PULSE

Section 5 Installation and Set-Up

The detector has no DIP switches or jumpers to configure. Connect the detector to an appropriately wired harness and apply power. If the detector is not new from the factory, it may be advantageous to reset the detector back to the factory defaults to a void having to check every setting for each channel. To reset the detector to factory de fault, p ress a nd ho ld a ll four p ushb utton s w itches s imulta neous ly for five se co nds. W hen all four buttons are depressed, the display will start counting down from five (5). When the countdown reaches zero (0), releasing the pushbuttons w ill reload the factory defaults and reset both channels.

All operating parameters can be adjus ted from the front panel. The detector continues to operate norma lly while it is in the Program Mode. The value currently displayed is always the actual value being used. Example: If you are changing the delay time, t he t ime d isplayed at the instant that a vehicle entered the detection zone for that channel would be the value used for the delay timer.

Pressi ng the FU NC butto n enters the Prog ram Mode . The FUN C button has an aut o repea t functi on. This allows quick navigation to the desired parameter. The FUNC button only moves forward through all of the parameters. There is no way to move backwards through the parameters.

While viewing any parameter, pressing the CHAN button will display the same parameter for the next channel. The currently selected c hannel is indicated at the b ottom o f the LCD. Press ing and hold ing the C HAN b utton for one second will exit the Program Mode and return to the Normal Mode.

Pressi ng a nd ho ldi ng e it he r t he  (UP) or  (DOWN) button will ca use the value to change rap idly unt il the button is released.

5.1 PROGRAM MODE DISPLAY SCREENS

PARAMETER ...................Frequency.

ETTINGS ........................Eight (8) Selections - 1 to 8.

ETTING DISPLAYED ......Bargraph indicates settings from 1 (left) to 8 (rig ht).

SEGMENT DISPLAY ......Actual Frequency of the loop circuit. Typically 20. 0 to 99. 9

EFAULT SETTING..........Channel 1 = 3, Channel 2 = 7.

XAMPLE ........................Frequency setting 4 is selected for channel 1. The loop

OTES .............................Changi ng the fr eq ue nc y w ill res e t t he c han ne l. A n uns tab le

ARAMETER ...................Sensitivity.

ETTINGS ........................11 Selections - 1 to 9, OFF, or CALL.

ETTING DISPLAYED ......7-segment display will sho w the currently selected setti ng.

SEGMENT DISPLAY ......Currently selected Sensiti vity.

EFAULT SETTING..........6 fo r bot h c hanne ls.

XAMPLE ........................Sensitivity 5 is selected for channel 1.

OTES .............................Changing the sensitivity will reset the channel. If the

ARAMETER ...................Presence / Pulse Mode.

ETTINGS ........................Presence or Pulse.

ETTING DISPLAYED ......The word PRESENCE or PULSE will be displayed.

SEGMENT DISPLAY ......Blank.

EFAULT SETTING..........Presence for both channels.

XAMPLE ........................Pulse Mode is selected for channel 1.

OTES .............................If the channel is in the call state when this parameter is

kilohertz.

frequency is 34.9 kHz.

frequency display varying more than ±0.2 kilohertz may indicate loop crosstalk or other interference.

channel is in the call state when viewing this parameter, the bargra ph wil l show t he stre ngth o f vehic le c alls so that t he correct sensitivity can be verified from this screen.

changed, the change will not take effect until the detection zone is empty or the channel is re set.

889-1903-01 Model S-1200 Operations Manual Page 13 of 28

Page 20

DELAY

SECONDS

EXTENSION

SECONDS

MAX PRESENCE

SECONDS

EOG

ON © OPTION

OFF

ARAMETER ...................Delay.

P S

ETTINGS ........................256 Selections - 0 to 255 Seconds in one-se cond steps.

ETTING DISPLAYED ......7-segment display will sho w the currently selected setti ng.

SEGMENT DISPLAY ......Currently selected Delay time in seconds.

EFAULT SETTING..........0 seconds for both channels.

XAMPLE ........................Delay of 10 seconds selected for channel 1.

OTES .............................If the channel’s detection zone is occupied when this

ARAMETER ...................Extension.

ETTINGS ........................256 Selections - 0 to 25.5 Sec onds in 0.1-second steps.

ETTING DISPLAYED ......7-segment display will show the currently selec ted setting.

SEGMENT DISPLAY ......Currently selected Extension time in seconds.

EFAULT SETTING..........0 seconds for both channels.

XAMPLE ........................Extension of 2.5 seconds s elected for channel 1.

OTES .............................This parameter will hold the Disconnect timer value if

ARAMETER ...................Max Presence.

ETTINGS ........................1000 Selections - 1 second to 999 seco nds or O FF.

ETTING DISPLAYED ......7-segment display will sho w currently selected s ettin g.

SEGMENT DISPLAY ......Currently selected Max Presence time in seconds.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................M ax Prese nce is turned OFF f or chan nel 1.

OTES .............................If the channel’s detection zone is occupied when this

ARAMETER ...................EOG (End Of Green).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......Blank.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................EOG is turned ON for channel 1.

OTES .............................This parameter is only displayed if the Max Presence

ARAMETER ...................Option 1 (Loop / Lead-In Induc tance Display).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channe ls.

XAMPLE ........................Option 1 is turned ON for all channels

OTES .............................This option is a detector wide setting. Ch anging it for one

ARAMETER ...................Option 2 (Perce nt age of Inducta nce change, -∆L/L).

P S

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 2 is turned OFF for all channels.

OTES .............................This option is a detector wide setting. Ch anging it for one

parameter is changed, the change will not take effect until the detection zone is empty or the channel is reset.

Option 12.0 is ON and extension will not be added to a vehicle call if Option 12.0 and 12.1 are ON.

parameter is changed, the change w ill not take effect until the detection zone is empty or the channel is reset.

settin g for t he cha nnel ha s been p rogra mmed w ith a va lue between 1 and 999. Operation of this feature requires that the Phase Green Inputs be correctly connected to the controller phase green circu i try.

channel changes it for both channels. This option will automatically turn off 15 minutes after being activated or on loss of power.

889-1903-01 Model S-1200 Operations Manual Page 14 of 28

Page 21

OPTION

ON © OPTION

OFF

OPTION

ON © OPTION

OPTION

OFF

ARAMETER ...................Option 3 (Call Extension Control).

P S

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 3 is turned ON for channel 1.

OTES .............................Operation of this option requires that the Phase Green

ARAMETER ...................Option 4 ( Noise F ilter D isable).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 4 is turned OFF for all cha nnels.

OTES .............................This option is a detector wide setting. Ch anging it for one

ARAMETER ...................Option 5 (Phase Green Loop Compensation).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for bot h channe ls.

XAMPLE ........................Option 5 is turned ON for channel 1.

OTES .............................Operation of this option requires that the Phase Green

ARAMETER ...................Option 6 .0 (Display Vehicle C ount).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 6.0 is turned ON for channel 1.

OTES .............................This option is only visible on t he S-12 01 ver sion o f the S -

ARAMETER ...................Option 6.1 (Reset Vehicle Count).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 6.1 is turned O FF for channe l 1.

OTES .............................This op tion is onl y vis ible o n the S -1201 ve rsio n of the S-

Inputs be correctly connected to the controller phase green circuitry.

channel changes it for both channe ls. Changing the sett ing of this option will reset both detector channels. It is

recommended that thi s option be set to OFF f or normal operation.

Inputs be correctly connected to the controller phase green circuitry.

1200.

889-1903-01 Model S-1200 Operations Manual Page 15 of 28

Page 22

OPTION

OFF

OPTION

OFF

OPTION

ON © OPTION

OFF

PARAMETER ...................Option 7 (Number of Loops).

ETTINGS ........................7.01 through 7.05.

ETTING DISPLAYED ......7-segment display will show currently se lec te d s e tting.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........7.04 for both channels.

XAMPLE ........................The number of loops is set to 4 for channe l 1.

OTES .............................This op tion is onl y vis ible o n the S -1201 ve rsio n of the S-

ARAMETER ...................Option 9 (Third Car Passage).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 9 is turned OFF for cha nnels 1 and 2.

OTES .............................This is a paired channe l optio n. Channel 1 is paired with

ARAMETER ...................Option 1 0 (Directional Logic ) .

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 10 is turned OFF for cha nnels 1 and 2.

OTES .............................This is a paired channel option. Channel 1 is paired with

ARAMETER ...................Option 11 (Audible Detect).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 11 is turned ON for channel 1.

OTES .............................This op tion is mutua lly exc lusive w ith the same o ption o n

ARAMETER ...................Option 12.0 (Detector Disconnect).

ETTINGS ........................ON or OFF.

ETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 12.0 is turned ON for channel 1.

OTES .............................When this option is turned ON, the value entered in

ARAMETER ...................Option 12.1 (Detector Disconnect Type).

ETTINGS ........................ON or OFF.

SETTING DISPLAYED ......The word ON or OFF will be displayed.

SEGMENT DISPLAY ......The number of this option.

EFAULT SETTING..........OFF for both channels.

XAMPLE ........................Option 12.1 is turned O FF for cha nnel 1.

OTES .............................When this option is turned ON, the value entered in

1200.

channel 2. Changing the setting for one channel also changes the setting for the paired channel. Turning ON Optio n 9 automatically turns OFF Option 10.

channel 2. Changing the setting for one channel also changes the setting for the paired channel. Turning ON Optio n 10 automatica lly turns OFF Opt ion 9.

the other channel. Turning it ON for one channel turns it OFF for the o ther c hanne l. This optio n will a utoma tical ly turn OFF 15 minutes after being activated or on loss of power.

Extension time is used as a Disconnect time. Operation of this option requires that the Phase Green Inputs be correctly connected to the controller phase green circuitry.

Extension time is used as a Disconnect time and no extension of the call is made. When Opt ion 12.1 is t urne d OFF, Extension time is active. Extension time and Disco n nect ti me functi on conc ur rently.

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Page 23

LOOP FAIL

PRESENCE

PULSE

ARAMETER ...................Loop Fail.

ETTINGS ........................Pressing the  (UP) or  (DOWN) button will clear t he

Loop Fail memory.

ETTING DISPLAYED ......View only.

SEGMENT DISPLAY ......Loop Failures since the last time it was cleared manually or

due to power failure.

EFAULT SETTING..........0 fo r bot h c hanne ls.

XAMPLE ........................There are eight (8) Loop Failures in the accumulator for

channel 1.

OTES .............................Count will be reset to zero after loss of power, by pressing

the  (UP) or  (DOWN) button, or by resetting the channel.

ARAMETER .............................Firmwar e Vers ion and R evision.

ETTINGS ..................................View Only.

ETTING DISPLAYED ................View Only.

SEGMENT DISPLAY ................Mode l let ter a nd f ir mware ve rs ion

EFAULT SETTING....................Not Applicable.

XAMPLE ..................................Model S firmware version 34,

5.2 NORMAL MODE DISPLAY SCREENS

STATE .............................Idle.

ARGRAPH DISPLAY .......OFF.

SEGMENT DISPLAY ......Three Dashes.

EXT ...............................PULSE or PRESENCE indicating detection mode of the

HANNEL LED ...............OFF.

HANNEL OUTPUT..........OFF.

XAMPLE ........................Channel 1 is idle and in the presence mode of detection.

OTES .............................This is the normal state for the display when the loop

TATE .............................Presence Call.

ARGRAPH DISPLAY .......Number of sensitivity levels that the inductance change

SEGMENT DISPLAY ......Call.

EXT ...............................PRESENCE, indicating detection mode of the channel.

HANNEL LED ...............Solid ON.

HANNEL OUTPUT..........ON.

XAMPLE ........................Channel 1 detection zone is occupied by a vehicle that

TATE .............................Pulse Cal l.

ARGRAPH DISPLAY .......OFF.

SEGMENT DISPLAY ......-

EXT ...............................PULSE, indicating detection mode of the channel.

HANNEL LED ...............ON for 125 milliseconds.

HANNEL OUTPUT..........ON for 125 milliseconds.

XAMPLE ........................Channel 1 detection zone is occupied and channel 1 is

NOTES .............................This display is only shown for 125 milliseconds (the

channel.

detection zone is unoccupied and the cha nnel does not have any timing options set.

caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sens itivity level, etc.).

exceeds the detection threshold by four (4) sensitivity levels and channel 1 is outputting a call.

outputting a call of 125 milliseconds duration.

duration of the pulse output).

- for 125 milliseconds.

on one screen and firmware revision on the other screen.

revision .00.

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Page 24

PRESENCE

DELAY

SECONDS

PRESENCE

EXTENSION

SECONDS

MAX PRESENCE

SECONDS

MAX PRESENCE

EOG

SECONDS

TATE .............................Ti ming Delay.

S B

ARGRAPH DISPLAY .......Number of sensitivity levels that the inductance change

SEGMENT DISPLAY ......Countdown of remaining Delay time (in seconds).

EXT ...............................SEC O N DS, DELAY, and PULSE or PRESENCE.

HANNEL LED ...............Fo ur Hz flash ra te with 5 0% duty cyc le (125 ms ON, 125

HANNEL OUTPUT..........OFF.

XAMPLE ........................Channel 1 detection zone is occupied by a vehicle that

TATE .............................Timi ng E xt e nsion.

ARGRAPH DISPLAY .......OFF.

SEGMENT DISPLAY ......Countdown of remaining Extension time (in seconds).

EXT ...............................SEC O N DS, EXTENSION, and PULSE or PRESEN CE.

HANNEL LED ...............16.6 Hz flash rate w ith 50% duty cycle (30 ms ON, 30 ms

HANNEL OUTPUT..........ON.

XAMPLE ........................Channel 1 detection zone is vacant, there are two and one-

OTES .............................When Option 12.0 is ON and 12.1 is O FF, the Extension

TATE .............................Ti ming Max Presence.

ARGRAPH DISPLAY .......Number of sensitivity levels that the inductance change

SEGMENT DISPLAY ......Countdown of remaining seconds of Max Presence.

EXT ...............................SEC O N DS and MAX PRESEN CE.

HANNEL LED ...............Solid ON.

HANNEL OUTPUT..........ON.

XAMPLE ........................Channel 1 detection zone is occupied by a vehicle that

TATE .............................Max Presence Timed Out and Waiting for End Of Green.

ARGRAPH DISPLAY .......Number of sensitivity levels that the inductance change

SEGMENT DISPLAY ......000 - Showing that the Max P r esence timer has timed out.

EXT ...............................SECONDS, MAX PRESENCE, and EOG (EOG will be

HANNEL LED ...............Solid ON.

HANNEL OUTPUT..........ON.

XAMPLE ........................Channel 1 detection zone is occupied by a vehicle that

caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sens itivity level, etc.).

ms OFF).

exceeds the detection threshold by two (2) sensitivity levels, there are three (3) seconds of Delay remaining, and channel 1 is not outputting a call.

OFF).

half (2.5) seconds of Extension time rema ining, a nd channel 1 is outputtin g a call.

timer becomes the Disconnect timer.

caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sens itivity level, etc.).

exceeds the detection threshold by five (5) sensitivity levels, there are 30 seconds of Max Presence remaining, and channel 1 is outputting a call.

caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sens itivity level, etc.).

flashing).

exceeds the detection threshold by five (5) sensitivity levels , Max Pr esence has time d out a nd is wait ing for the End Of Green, and channel 1 is outputting a call.

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Page 25

PRESENCE

STATE .............................Pending.

ARGRAPH DISPLAY .......Number of sensitivity levels that the inductance change

SEGMENT DISPLAY ......Pnd.

EXT ...............................PULSE or PRESENCE indicating detection mode of the

HANNEL LED ...............3.3 Hz flash rate w ith 83% duty cycle (250 ms ON, 25 ms

HANNEL OUTPUT..........OFF.

XAMPLE ........................Channel 1 detection zone is occupied by a vehicle that

OTES .............................The Pe nd in g s t at e is us e d w hen the cha n ne l would normall y

caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sens itivity level, etc.).

channel.

OFF).

exceeds the detection threshold by seven (7) sensitivity levels and channel 1 is not outputting a call. Either Option 9 (Third Car Pass age), Option 10 (D irectional Logic), or Option 12 (Detector Disconnect) has been selected.

output a call but is not, due to the operat ional functions of Options 9 (Third Car Passage), Option 10 (Directional Logic), or Option 12 (Detector Disconnect).

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Page 26

L =

-∆L/L =

TATE .............................Loop Inductance Disp lay (Optio n 1 ON).

S B

ARGRAPH DISPLAY .......O FF if no vehicle is detected. Number o f sensitivity le vels

SEGMENT DISPLAY ......Loop / Lead-In circuit inductance in microhenries. If the

EXT ...............................L=.

HANNEL LED ...............The detect LED operates normally indicating call, no call,

HANNEL OUTPUT..........The channel o utput operates normall y.

XAMPLE ........................Channel 1 Loop / Lead-In circuit inductance is 98

OTES .............................If Option 2 (-∆L/L Display) is ON, this display is only

TATE .............................Loop Inductance -∆L/L Display (% Change) (Option 2

ARGRAPH DISPLAY .......OFF.

SEGMENT DISPLAY ......Percentage of change in inductance of the Loop / Lead-In

EXT ...............................-∆L/L.

HANNEL LED ...............The detect LED operates normally indicating call, no call,

HANNEL OUTPUT..........The channel o utput operates normall y.

XAMPLE ........................Pe rce nta ge c han ge o f ind ucta nce o f the ca ll o n cha nne l 1 is

OTES .............................This d isp lay is o nly visible while the channel is detecting a

that t he inducta nce change caused b y the vehic le exceeds the det ect ion t hres hold ( firs t dot = c urre nt se nsit ivit y leve l, second dot = next lower sensitivity level, etc.) if a vehicle is detected.

value exceeds 999, the display will alternate between the thousands place (1 or 2) and the lower three d igits of the inductance value.

delay, extension, and /or pend ing as expected .

microhenries and channel 1 is not detecting a vehicle.

visibl e when the channel is not d etecti ng a vehic le.

ON).

circuit.

delay, extension, and /or pend ing as expected .

0.087%.

vehicle and not timing any functions.

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Page 27

1 © 1

-∆L/L =

LOOP FAIL

OPTION

MAX PRESENCE

OFF

EOG

SCANNING

EXTENSION

SENSITIVITY

DELAY

PULSE

SECONDS

3 2 1

LOOP FAIL

+25% change Or

LOOP FAIL

-25% change Or

STATE .......................................Accumulated Vehicle Count

ARGRAPH DISPLAY .................OFF if no vehicle is detected.

SEGMENT DISPLAY ................Alternates between upper two

EXT .........................................None.

HANNEL LED .........................The detect LED operates normally

HANNEL OUTPUT....................The channel output operates

XAMPLE ..................................The accumulated vehicle count for

OTES .......................................This display w ill flash while the

TATE .............................LCD Tes t .

ARGRAPH DISPLAY .......A ll segme nts on.

SEGMENT DISPLAY ......All segments on.

EXT ...............................All segments on.

HANNEL LED ...............The detect LED operates normally indicating call, no call,

delay, extension, and /or pend ing as expected .

HANNEL OUTPUT..........The channel o utput operates normall y.

XAMPLE ........................All segments on.

OTES .............................This d isplay is vis ible whene ver two or th ree pushbut ton

switches are pressed at the same time.

Display (Option 6.0 ON).

Number of sens itivity levels that the inductance change caused by the vehicle exceeds the detection threshold (first dot = current sensitivity level, second dot = next lower sensitivity level, etc.) if a vehicle is detected.

digits and the lower three digits. If the upper two digits are zero, they are not displayed at all and only the lower three d igits will be displayed.

indicating call, no call, delay, extension, and/or pending as expected.

normally.

channel 1 is 21,187.

detector is in the training mode. This d isp lay is o nl y v isi ble on the S-1201 version of the S-1200.

5.3 LOOP FAIL INDICATIONS

If the to tal induc tanc e of a c han nel’s loop inp ut net work goes out o f the range specified for the detector, o r rapidly changes b y more than ±25%, the channel will enter the Fail-Safe mode and LOOP FAIL will be displayed on the LCD. T he type of loop failure will a lso be displa yed as L l o (for -25% change or shorted loop co nditions) or L hi (for +25% c hange or open loop conditions). This will co ntinue as long as the loop fault exists. Fail-Safe mode generates a continuous call in Presence Mode and in Pulse Mode. At the time of a loop failure, the channel’s LED will begin to flash at a ra te of three flashes per second. The LED will continue this display pattern until the channel is manually reset or power is removed.

If the loop self-heals, the LOO P FAIL message on the LCD will

open loop conditions.

shorted loop

conditions.

exting uish and the channel will resume opera tion in a normal manner; except, the LED will continue the three flashes per second display

pattern, thus, providing an alert that a pr ior Loop Fail condition has occurred. Each loop failure is counted and accumulated into the Loop Fail Me mory. The tota l number of loop failures for the channel is written into the Loop Fail Memory (s ince the last power interruptio n or manual reset) and can be seen by stepping through the channel’s functions in Program Mode to the LOOP FAIL display.

This is a useful tool to identify inter mittent loop pr oblems. If the count is extremely high for t he pe r iod of t i me observed, the problem is very likely a lo ose connection (check for loose connections at the ter minal strip and

889-1903-01 Model S-1200 Operations Manual Page 21 of 28

Page 28

bad splices in the field). The Loop Fail Count is reset when power is removed from the detector. This prevents the Loop Failure Count from moving to another loop, if the detector is moved to a new location.

To view the Loop Fail Count, repeatedly press the FUNC button until the LOOP FAIL display is shown. The Loop Fail Count display is after the OPTION displays. Pressing the  (UP) or  (DOWN) b utton while the Loop Fail Count is displayed will reset the count to zero.

NOTE: The Loop Fail Count is n ot rese t when the setting of Opti on 4 (Noise Filter Dis able) is c hanged or when the channel’s sensitivity or frequency is changed. The prior Loop Fail indication will continue until the L oop Fail Count is reset to zero.

5.4 SETTING SENSITIVITY USING THE BARGRAPH

The bargraph is a graphical representatio n of the relative change of inductance as seen by the channel. It automatically takes into account the channel’s sensitivity setting, loop geometry, configuration, lead-in length, etc. The first bar segment represents the minimum inductance change (set by the sensitivity level) necessary for the c hannel to output a call. Each additional segment to the right represents the inductance change in excess of the next se nsi tiv ity t hre sho ld. Us ual ly, t he lar ger t he ve hicle , t he grea ter the -∆L/L; thus, more and more segments are displayed. The bargraph can be used as a precise indicator to select the proper sensitivity level.

The bargraph below shows the deflection (3 segments) of a vehicle with Sensitivity set to Level 4. The vehicle in the loop zone is causing a change of inductance greater than 0.32% -∆L/L or Sensiti vity Level 2.

The bargraph, below, has the same vehicle in the loop zone causing the same inductance change as above. Since the sensitivity setting was increa se d to Level 7, six segments are now displayed. If the bargraph displays 5 or 6 segments fo r a ve hi c le in t he lo op a nd mot or c ycle s a r e no t a c onc e rn, t he s e ns iti vi ty ha s be e n se t to t he

proper range.

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Page 29

Step 1: Observe a

zone. Note the number of segments displayed on the

Step 2: Go to the

Step 3: Subtract the

actual number of segments displayed from the desired

Increase the

sensitivity three

Step 4: Verify that a

mobile causes the

o move

Step 5: A small

detected causing a one segment

PRESENCE

SENSITIVITY

5.5 SETTING SENSITIVITY FOR MOTORCYCLE DETECTION USING THE

BARGRAPH

The bargraph can also be used to select the proper se ns itivit y level for small motorcycle detection. T he re la tive change of inductance caused by a motorcycle and a single automobile are proportional on any loop configuration. Selecting the sensitivity level that causes the bargraph to display the seventh segment for a single standard auto mobile automatically sets the sensitivity to detect small motorcycles. Follow the steps below:

single standard automobile in the loop

bargraph. (4)

Note: This method applies to convent ional loop configurations only. Other loop configurations, s uch as Quadrupole

Program mode. Note the sensitivity level. (3)

number of 7. (7 - 4 =

levels.

single standard auto-

bargraph t seven segments.

motorcycle should be

deflection.

, will require a different method to correctly set sensitivity for motorcycle detection. Increasing the sensitivity to detect motorcycles in some loop configurations will make the loop sensitive to adjacent lane detection. If adjacent lane traf fic is de tect ed, the phase will max time when n o vehicl es are pr esent in the loop (see Option 5 - Phase Green Loop Compensation for a possible solution).

5.6 FULL RESTORE TO FACTORY DEFAULT SETTINGS

Pressi ng a ll four fro nt p ane l sw it che s si mult ane ous ly a nd co ntin uous ly for five (5 ) se cond s r ese ts t he d etector and restores all the factory default settings. The countdown of the five second period is displayed on the LCD. Releasing any of the switches before the countdown ends aborts the Full Restore operation. (See Section 3.5 for default settings.)

5.7 DISPLAY TEST

Pressing any two or three o f the front panel switches simultaneous ly will turn on all possible symbols and messages on the LCD.

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Page 30

Channel 1

Loop

Isolation

Loop

Oscillator

Loop

Capacitors

Non-volatile

Memory

Channel 2

Loop

Isolation

Loop

Oscillator

Detect LEDs

Ch. 1 Phase Green Input

LCD

Ch. 2 Phase Green Input

Input Voltage

GND

Front Panel

32 MHz

Oscillator

Detect

Loop

Capacitors

Count

Squaring Circuit

Buzzer

+5 VDC

Section 6 Block Diagram

Loop Inputs

889-1903-01 Model S-1200 Operations Manual Page 24 of 28

Power

Supply

Outputs

Micro Controller

Pushbutton

Switches

Outputs

Page 31

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Page 32

Section 7 Theory of Operation

The Reno A & E Model S-1200 detector digitally measures changes in the resonant frequency of two independent loop circuits to determine if a vehicle has entered the dete ction zone. The Mode l S-1200 Series detector applies an exc itation voltage to each loop circuit resulting in the loops oscillating at their res onant frequency. The current flow in the loop wire creates magnetic fields around t he loop wire. When a vehicle passes over the loop area, the conductive metal of the vehicle causes a loading of the loop’s magnetic fields. The loading decreases the loop inductanc e, w hic h c a use s t he re so na nt fr eq ue nc y to i nc re as e. By co nt inu o us ly sampling the loop’s resonant frequency, th e magnitude and rate of cha nge can be dete r mined. If the frequenc y change exceeds a selectable threshold (set by t he sensitivity settings), the chan ne l will activate an output signal. If the rate of change is slow, typical of enviro nmental drift, the channel will continuously track and compensate for the c ha nge . The Mo de l S -1200 detecto r also monito rs the loop freq uency for out of range co ndit io ns s uc h as an open or shorted loop circuit.

The Model S-1200 detector is a sca nning detector. The scanning method sequenti ally turns each channel’s loop oscillators on and off. Each channel’ s oscillator circuit supp lies the excitation volta ge that is coupled to the loop circuit by a loop isolation tra nsformer. The c hannel’s os cillator circuit s upplies t he excitation volta ge that is coupled to the loop circuit by a loop isolation transformer. The transformer provides high common mode is ola tio n be twe en the loop and detec tor electronics, w hich allows t he channe l to operate on poor quality loops including a single short to ground. The tra nsformer also limits the amount of static e nergy (lightning) that can transfer to the detector elect ronics. A spark gap transient suppress ion device is connected across the loop inputs connected to the isolation transformer. This device dissipates static charges before they reach the transformer. A network of four capacitors is connected to the detector side of t he isolatio n tra ns for mer. Thre e of the capacitors can be sw itched in or o ut of the oscillato r circuit to s hift the freque ncy of the loop osc illator circuit thus providing frequency separation between adjacent loops. The three switchable capacitors are electronical ly sw itc hed usi ng FE Ts a nd a re s ele cte d whe n pr ogr amm ing para me ter val ues w ith t he fro nt pa ne l pushbutton switches.

The outputs from the two loop oscillators are tied together and fed into a common squaring circuit. This is possible since the detector is a scanning detector that allows only a single loop oscillator to be operat ing at any given time. The sine wave fro m the loop oscillator c ircuit is squared to provide a precise zero cross ing s ignal for the input to the microcontroller. This signal is calle d the loo p sample. The loop sa mple is a n integra l number of complete oscillations from the loop oscillator circuit. The number of loop oscillations co unted is a function of the selected sens itivit y sett ing for the channel. The required number of loop oscillations needed for a loop sample increases as the sensitivity setting is increased. The microcontroller uses the period of the loop sample for accumulating high-speed (32 MHz) crystal clock pulses generated by the mic rocontro ller’s inter nal high-speed crystal oscillator. The number of crystal clock pulses a cc umulated during consecutive loop samples is compared to the internal reference number of crystal clock pulses s tored in the microcontroller’s memory.

When a vehicle enters the loop zone the loop inductance decreases. This decrease in loop inductance causes an increase in the loop oscillator frequency. In turn, an increase in loop oscillator frequency results in a decrease of the time period for the lo op sample. Hence, when a vehicle enters the loop zone the number of crystal clock pulses accumulated during a loop sample period decreases. By comparing the new count with the reference count, a percentage change can be calc ulated that indirectly relates to the inductance change. If the magnitude of the change exceeds a selectable threshold (sensitivity setting), the channel activates an output device. The rate of change is also monitored. Slow rates of change caused b y environmental fluctuations are tracked a nd automatically compensated for.

The microcontroller uses t he high-speed crysta l clock count to calculate the loop inductance, frequency and percentage of change. If selected, the values are displayed on the seven segment LCD. The microcontroller also processes the pushbut t on switch selections for the LCD and stores the operating parameters in non-volatile memory. Stored parameters are only changed with the front panel switches and are unaffected b y loss of power or channel reset. The microcontroller continuously processes the loop samples and the detector operation is not affected during the operation of the switches or the LCD. (Note: When either channel’s sensitivity or frequency is c hanged, that channel is r eset.)

In addition, the microcontroller conditions the outputs based on Phase G reen Inputs and the pro grammed settin gs of t he vario us time rs (De lay, Ext ensio n, and M ax Pres ence) a nd opt ions (E OG, Opt ion 3, O ption 4, Option 5, Option 9, Option 10, and Option 12).

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Page 33

Symptom

Where To Start

No LCD display and no LEDs lit.

See Troubleshooting Power Problems.

LCD displays garbage and detector does not respond

to button presses.

Detector does not respond to button presses.

See Troubleshooting Initialization Problems.

LCD continually displays

L lo and Loop Fail or L hi and Loop Fail.

The channel detect LED is flashing three times per

second and channel appears to be working correctly.

Detector intermittent ly stays in the Call state.

See Troubleshooting Intermittent channel Lock Ups.

A channe l will not t ime delay.

See Troubleshooting Delay Problems.

A channel does not always time delay.

See Troubleshooting Delay Problems.

LCD disp lays Pnd and a channel does not output a

call.

One of the paired channel options (Option 9 or 10) or detector

disconnect (Option 12.0) has bee n turned o n.

A channel does no t always t ime extension.

Option 3 is on.

EOG is t urned on and the Phase Green Inp ut for the channel is not

transitioning from green to not green.

The sensitivit y for the channel has been set t o Call forcing the channel

to output a constant call.

Section 8 Maintenance and Troubleshooting

The Reno A & E Model S-1200 Detector requires no maintenanc e. If you are hav ing proble ms with your Model S-1200 detector, use the troubleshooting chart below to help deter mine the cause of the problem.

See Troubleshooting Initialization Problems.

See Troubleshooting Loop Fail Problems.

See Troubleshooting Intermittent Loop Fail Problems.

Max Presence never resets the channel.

LCD alwa ys displays a flashing Call.

8.1 TROUBLESHOOTING POWER PROBLEMS

Does the LCD display anything when the detector is powered up?

NO, Do any of the detectors in the cabinet display anything when powered up?

NO, Check the AC or DC Power Supply volta ge. Is it greater than 89 V AC and less than

135 VAC (120 VAC models) or greater than 180 VAC a nd less than 270 VAC (240 VAC models) or greater than 9.6 VDC and less than 14.4 VDC (12 VDC models)?

NO, Determine why AC/DC power is out of tolerance and have it corrected. YES, Wiring from the AC/DC Power Supply to detector is incorrect or

defective.

YES, Swap the detector with a working detector. Did the proble m follow the swapped detector?

NO, Confirm correct wiring of the harness and that the pins in the connector are not damaged.

YES, The swapped unit is defective. Repla ce the unit.

YES, Probably not a power related problem.

8.2 TROUBLESHOOTING I NITIALIZATION PROBLEMS

Does t he LCD dis play the Model and Firmware version when powered up?

NO, Replace the detector with a known good unit. Does the LCD dis pla y t he Mo de l and Fir mwa re version when p o wered up ?

NO, The connector or wiring harness is defective. Confirm correct wiring of the harness and that the connector is not defective or damaged. Check for unexpected voltages on any pin.

YES, Replaced unit was defective.

YES, After two seconds, are three dashes, Call, Off, or a Loop Fail message displaye d on the LCD?

NO, Replace the detector with a known good unit. After two seconds, are three dashes,

Call, Off, or a Loop Fail mes sage dis played on the LCD?

NO, The connector or wiring harness is defective. Confirm correct wiring of the harness and that the connector is not defective or damaged. Check for unexpected voltages on any pin.

YES, Replaced unit was defective.

YES, The unit is initializing correctly.

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Page 34

8.3 TROUBLESHOOTING LOOP FAIL PROBLEMS

Check each c hannel’s status by momentarily press ing the CHAN button to step through the c hannels. Do a ny of the c hannels displa y L hi and Loop Fail?

NO, Do any of the channels display L lo and Loop Fail?

NO, Both channels have tuned up to the existing loop / lead-in circuits and are within

acceptable limits. YES, There is probably a short in the loop / lead-in circuit. Disconnect the loop from the

terminal bloc k in the ca binet. D oes the s t atus of that channel now show L hi Loop Fail?

NO, The pro blem is i n the cabinet. Replace the detector with a known good unit. Does the status of that channel now show L hi Loop Fail?

NO, The detector is not the problem. Measure the resistance from each loop terminal to the pin in the connector. It should read less than

0.5 Ohms for both terminals. Check all wiring fro m termina l block to the connector in the harness. Also, check that t he connector itself is not defective.

YES, The replaced unit was defective.

YES, The pr oblem is in the f ield, e ither a s hort in t he loop / lead-in circuit or

insufficient inductance in the loop / lead-in circuit. Leave the loop disconnected in the cabinet. Connect a MegOhm meter set to 500 volts to one of the loop wires and earth ground. Is the resistance greater than 50 megOhms?

NO, There is leakage to earth ground in the loop / lead-in c irc uit. Disconnect the loop from the lead-in cable as close as possible to where the loop enters the pavement. Measure the resistance between one of the loop wires and earth ground. Is the resistance greater than 50 megOhms?

NO, The loop is damaged. Replace the loop. YES, The lead-in cable is defective. Replace lead-in cable.

YES, The problem is insufficient inductance in the loop / lead-in

circuit. This indicates to o few turns in the loop itself or so me of the turns are shorted to each other. In either case, the loop must be replaced to correct the problem.

YES, If a channel is not being used, yo u will see this disp lay if the channe l has not been tur ned off. Is there a loop connected to this channel?

NO, Chan ge the c hanne l’s s ensit ivity s etti ng to O FF a nd the L oop Fail message will no longer be displayed for the channel.

YES, There is an open or high resistance in the loop / lead-in circ u it. S hort ac ros s the loop inputs o n t he t e r minal blo c k in the ca binet. Do e s the s t a t us o f that cha n nel now s ho w L lo Loop Fail?

NO, The problem is in the cabinet. Replace the detector with a known good unit. D oes t he stat us o f that c hanne l now show L lo Loop Fail with the short still applied at the loop terminals?

NO, The detector is not the problem. Measure the resistance from each loop terminal to the pin in the connector. It should read less than

0.5 Ohms for both terminals. Check all wiring fro m termina l block to the con necto r in the harne ss. Also, check that the connector itself is not defective.

YES, The replaced unit was defective.

YES, The open or high resistance is in the field. With the loop still

disconnected, measure the resistance of the loop / lead-in c irc uit (fr om o ne le ad of the loop to the other). Is the resistance below five Ohms?

NO, Measure the resistance as close as possible to where the loop enters the pavement. Is the resistance below two Ohms?

NO, The loop is probably damaged. Replace the loop. YES, The lead-in cable is defective. Check all splices.

Replace the lead-in cable if necessary.

YES, The problem is probably excessive inductance. Are there several loops connected in series for the loop / lead-in circuit?

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NO, This is typ ica lly c aus ed b y ha vin g too man y tur ns i n a large loop. Replace the loop with one that has an inductance of less than 2000 microhenries.

YES, If possible, connecting each loop to its own c hanne l is preferred. Or try a parallel wiring arrangement for the loops if separate detection channels are not possible.

8.4 TROUBLESHOOTING INTERMITT EN T LOO P FAIL PROBLEMS

Have you been able to see the channel display while the loop failure was occurring?

NO, Loop Fail problems tend to be bad splices in the loop / lead-in circuit, shorts in the loop / lead-in circuit, shorts to earth ground in the loop / lead-in circuit, or loose connections or bad solder joints in the signal cabinet. If you have any splices that are not soldered and sealed with an adhesive heat shrink or epoxy resin, replace the splice with one that is. Using a MegOhm meter, measure the resistance from one of the loop wires to earth ground. It should be greater than 50 megOhms. Inspect the loop. Look for e xposed wires or debris pressed into the saw c ut. Tighten all screw terminals in the signa l cabinet that the loop circuit uses. Check solder jo ints in the loop circuit, especially on the harness itself. Disconnec t and reconnect any connector used in the loop circuit and check for loose pins and sockets in these connectors. If your cabinet has lightning or surge suppression devices on the loop inputs in the cabinet, remove or replace them. Check for places in the field where the loop wire or lead-in cable may be pinched or chaffed. Look for wires pinched under j u nc t io n box cove r s and w here the wire enters a conduit, especially where the loop wire leaves the saw cut and enters a conduit. After checking all of the above items, you could swap out the detector but this type of failure is rarely ever related to the detector.

YES, Did t he display show L hi?

NO, The d isplay must have been L lo then. This indicates a n inte rmittent shorted loop or -

25% inductance change. Using a MegOhm meter, measure the resistance from one of the loop wires to earth ground. It should be greater than 50 megOhms. Inspect the loop. Look for exposed wires or debris pressed into the saw cut. Check for places in the field where the loop wire or lead-in cable may be pinched or chaffed. Look for wires pinched under junction box covers and where t he wire enters a conduit, especially where the loop wire leaves the saw cut and enters a conduit. If your cabinet has lightning or surge

suppression devices on the loop inputs in the cabinet, remove or replace them. YES, This indicates an intermittent open loop or +25% inducta nce chan ge. If yo u have

any splices that are not soldered and sealed with an adhesive heat shrink or epoxy resin, replace the splice with one that is. T ighten all screw terminals in the signal cabinet that the loop circuit uses. C heck solder joints in the loop circuit, especially on the harness its elf. Disconnect and reconnect any connec tor used in the loop circuit and c heck for loose p ins and sockets in these connectors.

8.5 TROUBLESHOOTING INTERMITTENT DETECTOR LOCK-UPS

Have you been able to see the channel display while the loop was locked up?

NO, See Troubleshooting Intermittent Loop Fail Problems and follow the path for unable to see the channel dis play wh i le the lo o p failur e was oc curring.

YES, Were more than t wo segments lit in the ba rgraph on the LCD?

NO, Problems of this type tend to be difficult to isolate due to the many possible causes

and the s hort durat ion of the sy mptom (usua lly less tha n 30 minutes) . If the prob lem occurs more frequently in the morning or when raining, s uspect a s hort to earth gro und in the loop / lead-in circuit. This can usually be verified by testing w it h a Me gO hm meter but not always. Vibration can also be a possible cause. Loop wires may be moving slightly in a conduit due to vibrations fro m truck traffic. Utility lids in the street near the loop ma y also be a source of problems. Ensure that lids near a loop are bolted down so that they cannot move. Check that each set of loop wires is twisted together in each pull box and that le ngths ar e not exce ssive. And also see

Problems and follow the path for a loop failure that displays L lo on the LCD. YES, See Troubleshooti ng Intermitte nt Loop Fail Problems and follow the pat h for a

loop failure that displays L lo on the LCD.

Troubleshooting Intermittent Loop Fail

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8.6 TROUBLESHOOTING DELAY PROBLEMS

Does the channel ever time the Delay function?

NO, Is the Phase Green Input, for the channel having a problem, connected to a point that will be at 89 VAC to 135 VAC when the green associated with this channel of detection is on?

NO, Conne ct the Phase Green Input t o an app r opriate point. YES, Disconnect the Phase Green Input from the phase green and leave it disconnected.

Does t he Delay f unction now time?

NO, Replace the detector and ensure that there is delay time programmed. Does the new channel time the Delay f unction correctly?

NO, The pro ble m is in t he wir ing f rom t he phas e gree n to t he wir ing harness or the connector itself. The Phase Green Input lead is shorted to ground somewhere.

YES, The channel has a bad Phase Green Input circuit.

YES, The po int you a re usi ng to get phase green is always at a hig h potent ial

(greater than 89 VAC) or the phas e act ually is green all of the time.

YES, Reme mber t hat the delay funct ion is o nly ava ilabl e when t he P hase Gr een Inp ut is b elow 89 VAC. I f yo u wa nt t he de la y fu nc tio n a va il ab le a ll o f t he ti me, d isc on nec t t he P ha se Gre e n Inp ut . I f you are aware of this and the delay function still does not function at the correct times then the Phase Green Input, is connected to the wrong phase green. Connect the Phase Green Input to an appropriate point.

8.7 THINGS TO KNOW ABOUT LOOPS

Always use a wire with cross-linked Polyet hylene insu lation (insulation type XLPE) for loo p wire. Typical sensing height is ⅔ of the shortest leg of a loop. Therefore, a 6΄ x 6΄ loop will have a detection height of 4΄. The inductance of a conventional four-sided loop can be estimated using the formula: L = P x (T2 + T) / 4 Where: L = Loop Inductance in microhenries

P = Loop Perimeter in feet T = Number of Turns of Wire.

Therefore, a 6΄ by 6΄ loop with 3 turns would have an inductance of:

L = (6 + 6 + 6 + 6) x (32 + 3) / 4 L = 24 x (9 + 3) / 4 L = 24 x 12 / 4 L = 24 x 3

L = 72 microhenries. The inductance of a QuadrupoleTM loop can be estimated using the formula: L = [P x (T2 + T) / 4] + [CL x (T2 + T) / 4] Where: L = Loop Inductance in microhenries

P = Loop Perimeter in feet T = Number of Turns of Wire CL = Length of Center Leg in feet.

Therefore, a 6΄ by 50΄ loop with a 2-4-2 config uration w ould have an induct ance of:

L = [(6 + 50 + 6 + 50) x (22 + 2) / 4] + [50 x (42 + 4) / 4]

L = [112 x (4 + 2) / 4] + [50 x (16 + 4) / 4]

L = (112 x 6 / 4) + (50 x 20 / 4)

L = (112 x 1.5) + (50 x 5)

L = 168 + 250

L = 418 micr ohenries. Loop Feeder cable typically adds 0.22 microhenrie s of inductance per foot of cable. Total inductance of loops connected in series: L Total inductance of loops connected in parallel: L

= L1 + L2 + L3 + . . . + LN.

TOTAL

= 1 / [ (1 / L1) + (1 / L2) + (1 / L3) + . . . + (1 / LN) ].

TOTAL

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