Reno A&E U-1000 User manual

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Model U-1000

Loop Detector

Operations Manual

Four Channe l Menu Drive Programmable Inductive Loop Vehicle

Detector

Built-in Loop Analyzer for Each Channel

This manual contains technical in formation for the

Model U-1000 Loop Detector

Pn 889-2103-01 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 U-1000 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 Extension ........................................................................................................ 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 Inductance -∆L/L Display ................................................................ 4

2.10 Option 3: Call Extension Control ........................................................................... 4

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

2.12 Option 5: Phase Green Loop Compensation ........................................................ 4

2.13 Option 9: Third Car Passage ................................................................................ 5

2.14 Option 10: Directional Logic.................................................................................. 5

2.15 Option 11: Audible Detect Signal .......................................................................... 6

2.16 Option 12: Detector Disconnect ............................................................................ 6

Section 3 Specifications .................................................................................................. 8

3.1 Physical.................................................................................................................. 8

3.2 Electrical ................................................................................................................ 8

3.3 Operational ............................................................................................................ 8

3.4 Table: Sensitivity, -∆L/L, and Response Time......................................................... 9

3.5 Table: Default Settings .......................................................................................... 9

3.6 Table: Pin Assignments .........................................................................................10

Section 4 User Interface ..................................................................................................11

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

5.1 Program Mode Display Screens ............................................................................12

5.2 Normal Mode Display Screens ..............................................................................16

5.3 Loop Fail Indications .............................................................................................19

5.4 Setting Sensitivity Using the Bargraph ...................................................................19

5.5 Setting Sensitivity for Motorcycle Detection Using the Bargraph ............................20

5.6 Full Restore to Factory Default Settings ................................................................20

5.7 Display Test ..........................................................................................................20

Section 6 Block Diagram .................................................................................................21

Section 7 Theory of Operation ........................................................................................22

Section 8 Maintenance and Troubleshooting ................................................................23

8.1 Troubleshooting Power Problems ..........................................................................23

8.2 Troubleshooting Initialization Problems .................................................................23

8.3 Troubleshooting Loop Fail Problems .....................................................................24

8.4 Troubleshooting Intermittent Loop Fail Problems ...................................................25

8.5 Troubleshooting Intermittent Detector Lock-Ups ....................................................25

8.6 Troubleshooting Delay Problems ...........................................................................26

8.7 Things to Know About Loops .................................................................................26

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Section 1 General Description

This product manual was written for people installing, operating, a nd maintaining the R eno A & E Model U-1000 Series inductive loop vehicle detector. The Model U-1000 Series consists of two versions. The Model U-1200 is a four c ha n ne l, shelf mount t ype inductive lo op vehic le detector des igned to meet or excee d NEMA Standards T S 1-

1989. The Model U-1100 is a four channel, s helf mount t ype ind uctive loop vehic le dete ctor des igned specifica lly to conform to the specifications s et forth in paragraph 86-5.01A (3b) of the 1981 version o f the Caltrans Standard Specifications.

A front panel mounted, 4 pin, circular pla stic connector and 10 foot wiring harness have bee n included with the Model U-1000 detector to support Phase Green Inputs (Delay ove rr ides) for each channel. These inputs are used to control delay timing, phase green loop compensation, end-of-green, third car passage or detector disconnects. If these functions are required and cannot be accomplished satisfactorily through the controller, appropriate connection of the wiring harness will allow the detector to perform them.

The Model U-1000 uses a microcontroller to monitor and process signals from the loop / lead-in circ uits, Phase Green I nputs, and t he reset inp ut. It uses these input s to determine how to control the four detector channel outputs. A Liquid Crystal Display (LCD ), four light e mitting diodes ( LEDs), and four fro nt panel pushb uttons are used to display and program all detector functions. Several diagnost ic modes are available to aid technicians and service personnel in troubleshooting detection problems.

The use of a LCD is what distinguishes this detector from that of other manufacturers. It allows more informat ion, never before available, to be displayed to the user during normal operation of the detector. The LCD makes it easy to view and adjust all programmable detector opt ions and settings. It is no longer necessary to check o r change detector settings with DIP sw itches. An eight-segment bargraph at the top of the L CD can be used to provide a graphical representation of the relative change of inductance as seen by the detector at the current sensitivity level. The bargraph automatically takes into account loop size, loop inductance, nu mber 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 indicate more segments. Each additional segment indicates that the next sensitivity level has also been met or exceeded. When used in t his manne r, the bar graph prov ides an ind ication of whether the sensitivity is set too high or too low, facilitating the ideal setting of the se ns itivity level.

All programmed settings are stored in non-volatile memory and can only be changed by programming new settings. Loss of power or a detector reset will not change any of t he programmed settings. If a loop failure occurs, the LCD will display the type of lo op failure as L lo (for -25% change or s horted loop conditions) or L hi (for +25% change or open loop c onditions). Each loop failure is co unted and accumulated in the Loop Failure Memory. The number of failures since the las t detector reset or power interruption is very useful information during analysis of intermittent loop operation.

The Model U-1000 Series detector is a scanning detector. The 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 U-1000 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 circuit is scanned which can result in crosstalk.

When operating in the Program Mode, the Model U-1 000 Series d isplays the rea l time loop frequency reading for each channel. The eight frequency settings can be incremented or decremented to provide precise frequency readings, removing any guesswork w hen changing frequency settings to eliminate cros stalk. NOTE: Adjacent loops connected to different channels of a non-sc anning detector or different scanning dete ctors should be set to different frequencies with maximum separation.

The Re no A & E M odel U-1000 Series utilizes the first major innovat ion in inductive loop detectors since the introduction of digital detecto rs. The programming of all of the detector’s para meters with four normally open pushbutton switches not o nly simplifies setup by removing binary coded DIP switches, but also increases the reliability of the detector by eliminating the dependence on switch contacts during normal operation. The detailed descriptions displayed on the LCD eliminate the interpretation of numerous LED flash rates to determine the detector status. In addition, the Mode l U-1000 offers the ve rsatility of softwa re control. Spec ial functions are possible with a simple change of the socket-mounted microprocessor. Special functions are de fined as unique options (e.g. Option 5, Opt ion 12, etc.). Spe cial option functio ns are activated thro ugh the use of t he LCD menu option programming.

The Model U-1000 Series is comprised of the following detectors:

U-1100-R For retrofit applications ca lling for a four channel, shelf mount detecto r with

relay outputs and an audible detect signal (buzzer) conforming to the specifications set forth in paragraph 86-5.01A (3b) of the Caltrans Standard Specifications.

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U-1100-SS For retrofit applications ca lling for a four channel, shelf mount detecto r with

U-1200-R For NEMA TS 1-1989 applications calling for a four channel, shelf mount

U-1200-SS For NEMA TS 1-1989 applications calling for a four channel, shelf mount

solid state outputs and an audible detect signal (buzzer) conforming to the specifications set forth in paragraph 86-5.01A (3b) of the Caltrans Standard Specifications.

detector with relay outputs and an audible detect signal (buzzer).

detector with 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 (nor mally in the range of 20 to 100 kilohertz) per c hannel. The actual loop operating frequency is a function of the loop / lead-in network and the components of the loop oscillator circuit. The d igital display of the actual loop operating frequency for each setting makes it easy to quickly identify and eliminate crossta lk in the most difficult to configure intersections. The frequency display is typica lly very stab le when the loop is vacant and veh icles are not passing nearby the loops. If the reading is varyin g by more than ±1 in the last digit, this is an indication of possible crossta lk betwee n loops.

2.2 SENSITIVITY

There are nine (9) selectable sensitivity levels per channel, plus Continuous-Call and Cha nne l-O f f. T he s ensitiv i t y levels are designed so that a one level increase actually doubles the sensitivity and a one level decrease halves the sensitivity. A unique bargraph d isplayed on t he LCD makes it eas y to quickly set sensitivity at t he ideal leve l for any loop / lead-in network configuration. (See Section 3.4 fo r actual detection levels at each sensitivity level.)

ONTINUOUS-CALL: Whe n se t t o t he Co nt in uo us -Call state , the c hannel ou tput is co ntinuous ly in t he Call state

regardless of t he presence or absence of vehicles o ver the loop. The loop oscillator is d isabled when in the Continuous-Call state. T his state is indicated b y CALL flashing on the LCD. This option is selected from the Sensitivity menu in Program Mode and is useful for checking co ntroller response and other troubleshooting activities.

HANNEL-OFF: When s et to the Channel-O ff state, the channel output is cont inuously in the 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 sta te is indicated by OFF flashing on t he LCD. This option is selected from the Sensitivity menu in Program Mode and is useful for checking co ntroller response and other troubleshooting 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 min utes (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 detection of subsequent vehicles entering the loop detection 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 ad justab le from 0 t o 255 seconds in one-second steps. Call Delay time starts counting down when a vehicle enters the loop detection zo ne. The remaining Ca ll Delay time i s continuous ly displayed on the LCD . W he ne ver a Pha se Gr ee n I npu t ( Ca ll D e la y Ove r rid e ) s ig nal ( p in 1 , 2 , 3 , o r 4 o f t he 4-pin connector) is active, the Call Delay function for the channel is aborted and the Call Delay time is forced to zero.

2.5 CALL EXTENSION

Each c hannel’ s Call Ext ension is adjustable from 0 to 25.5 seconds in 0.1-second steps . Extension time starts counting down when the last vehicle clears the loop detection zone. The remaining Call Extension time is contin uous ly d isp la yed o n the LCD. Any veh icle ente r ing t he lo op de tec tio n zo ne d uri ng t he Ca ll E xtens io n ti me period causes the channel to return to the Detect state, and later, when the last vehicle clears the loop detection zone, the full Call Exte nsion time starts counting down again. (See Option 3, Call Extension Control, for an alternate mode of operation for Call Extension.)

2.6 MAX PRESENCE TIMER

When activated, each channel’s Max Presence timer 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 prese nce time, by automatically resetting the channel. If this function is enabled (ON), the Max Pre sence timer begins counting down when a call is initiated and t he remaining ti me is continuously displaye d on the LCD. If t he loop becomes vacant before the Max Presence timer reaches zero, the call is dropped and no automatic reset occurs. If the EndOf-Green (EOG) function is not enabled (OFF) and the call is still present when the Max Presence timer reaches zero, the cha nnel then is aut omatically reset. If the EOG function is enabled (ON) and the call is s till present when the Max Presence timer 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 1, 2, 3, or 4 of the 4-pin con nec tor ) tra ns itio ns from green to not green with t he call still present. If the loop be comes vacant first, the call is dro pped and no

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automatic reset occurs. If the Phase Green Input transitions from green to not green while a channel is in a Wait state, the channel is automatically reset. The signals on pins 1, 2, 3, and 4 of the 4-pin connector are also called Call Delay Overrides. (See Section 3.2, Phase Green Input specification for voltage levels.)

2.7 END-OF-GREEN (EOG)

Each channel’s EOG setting can be toggled O N or OFF b y moment arily pr essing either the  (UP) or  (DOWN) button. The EOG function is used to synchronize resetting of a detector with the termination of the associated phase green. The assumption is that this is t he safest point in t ime to reset t he channel. T his assumpt ion 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 w hen traffic comes to rest over the loop(s). The EOG function is only available when the Max Presence function is set between 1 and 999 seconds. It is not available when the Max Prese nce fun ct io n is O FF. W he n t he E OG func t io n is ena b led (ON ), t he channel will automatica lly be reset at the same time the Phase Green Input s ignal (pin 1, 2, 3, o r 4 of the 4-p in 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 s ig nals o n pins 1, 2, 3, and 4 of the 4-pin connector are also called Call Delay Overrides. (See Section 3.2, Phase Green Input specifications for voltage levels.)

2.8 OPTION 1: LOOP INDUCTANCE DISPLAY

Each channel’s Loop Inductance Display setting can be toggled ON or OFF by momentarily pressing either the  (UP) or  (DO W N ) b u t to n. W hen this option is e na b le d (ON), t he LCD d is p lays the to t al lo o p i nd uc t a nc e (a c t ua l loop inductance plus actual lead-in inductanc e) in micro henrie s for loop in ductanc e values in the ra nge 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 this option act ivates it for all c hannels. This option is auto matically disabled 15 minutes after activation or on loss of power.

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

Each cha n ne l’s Loo p I nd uct a nce -∆L/L Display sett ing can be toggled ON or OFF by momentarily press ing either the  (U P) or  (DOWN ) button. Wh en this option is enab led (ON), the LCD dis plays the pe rcentage of inductanc e change ( -∆L/L value) during the Call state. To facilitate t he viewing of the maximum amount 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. NOT E: Enabling this option activates it for all channels. This option is automatically disabled 15 minutes after activation or on loss of power.

2.10 OPTION 3: CALL EXTENSION CONTROL

Each cha nnel’ s Cal l Exte nsion C ontro l set ting ca n be to ggled O N or OF F by mo mentar ily pre ssin g eithe r the  (UP) or  (DO WN ) b ut to n. W he n t h is o pt io n is e nab led (O N) , t he c ha n nel w ill e x tend ca l ls f or t he pr o gra mme d extens ion ti me only when t he P hase Gr ee n Inp ut s ign al ( pi n 1, 2 , 3, or 4 of the 4 -pin connector ) is active. When this o pt ion is OF F, t he channe l extends A L L c alls for t he p r o grammed e xt e nsion t ime . The si g na ls o n pins 1, 2 , 3, and 4 of the 4-pin connector are also called Call Delay Overrides. (See Section 3.2, Phase Green Input specifications for voltage levels.)

2.11 OPTION 4: NOISE FILTER DISABLE

The detector’s Noise Filter Disable setting can be toggled ON or OFF by momentarily pressing either the  (UP) or  ( DO WN ) b utt o n. W he n Op t io n 4 is e nab le d ( ON ), inte r na l no is e f ilt er in g is d isa ble d t hus p ro vid in g a fas te r response time. When this option is O FF, internal noise filtering is utilized. W hen the detector is used in speed and/or occ upa ncy a pp lica tio ns, the noise filter should be disabled (i.e. Option 4 ON ) to provide the most acc urate data possible. It is recommended t hat this option not be activated. The factory default setting o f OFF provides stable operation in high crosstalk environments. NOTE: Enabling this option activates it for all channels. Changing the setting of this feature will reset all detector channels.

The Loop Fail Count is not reset when the 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 can be toggled ON or OFF by mo mentarily pressing either the  (UP) o r  (DOWN) button. W hen Option 5 is enabled (ON), normal loop compensation is used until the Phase Green Input signal (p in 1, 2, 3, or 4 of the 4-pin connector) becomes active. Once the Phase Green Input signal is active, the channel desensitizes the loop. Maximum desensitization is 0.05% (-∆L/L). This desensitization tunes out small changes, such 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 follow ing the start of Phase Green. This option is useful in minimizing false detectio n resulting from adjace nt lane pickup when

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Loop B

Loop A

a channel must be run with a high sensitivity setting. When Option 5 is not enabled (OFF), normal loop compensation is use d.

2.13 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  (DO WN ) b ut to n. O p tio n 9 is a p a ire d cha nne l opt io n. Th is me ans t hat it ta ke s t w o c ha nne ls to imp le me nt 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 U-1000, Channel 1 is paired with Channel 2 and Channel 3 is paired with Cha nnel 4. NOTE: Optio n 9 is mut ually e xclusive with Op tion 10 . Turning ON one option will auto matically turn OFF the other option.

When Op t ion 9 is e nab led (ON ) , t he o utp u t o f the tw o pa ir ed c ha n ne ls a re log ic a lly AND ed t o get he r. Th is mea ns that while the loops for both of the paired channels are occupied, a call will be output on both channels. While only one channel is occupied, or neither channel is occupied, a call will not be output for either cha nnel. The first channel with detection will enter a pending state while waiting for detection on the other paired channel. While in the pending state, the LCD will show Pnd on the d isplay.

This feature is intended to be used in Protected / Permissive left turn situations. The expected installation is a stop bar loop for the left turn lane connected to one channel, a queue detection loop (with a small amount of delay time programmed) for the left turn lane connected to the other channel, and the output of eithe r channel conne cted to the Vehicle Call input for the protected movement of the traffic controller.

Basic Installation - Loop A is the Queue Detection loop and Loop B is the Stop Bar loop.

Car enters Loop A - No call is output.

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 still over Loop B, a call will be output.

When T hird Car P assage is turned o n, as the fi rst vehi cle enter s the left turn lane it will d rive ove r the queue detection loop. Since there is no vehic le over the stop bar loop, there is no call ou tput ge nerate d. The vehic le advances to the stop bar loop. Still, no output is generated because there is no vehicle over the queue detection loop. If the vehicle traffic in the left turn lane backs up to the queue detection loop, then the stop bar loop and t he 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 left turn. This should help clear the queue of vehicles in the le ft turn lane. The spacing between the stop bar loop and the queue detectio n loop controls the size of the queue needed to generate a call to the protected movement of the controller. The delay time on the Queue Detection loop should be sufficiently long that vehic les driving over this loop to enter the queue do not ge nerate a call.

2.14 OPTION 10: DIRECTIONAL LOGIC

Each channel’s Directional Logic setting can be toggled ON or OFF by momentarily pressing either t he  (UP) or  (DOWN) button. Option 10 is a paired c hannel option. This means that it takes two channe ls to implement t he

feature. Therefore, when this option is toggled ON or OFF in one channel, its paired channe l is a lso set to the sa me state. In the Model U-1000, Channel 1 is paired with Channel 2 and C hannel 3 is paired with Channe l 4. NOTE: Option 10 is mutually exclusive with Opt ion 9. Turning ON one option will automatically tur n OFF the other option.

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Loop B

Loop A

When Option 10 is enabled (ON), directional logic is enabled. Directional logic starts with a detect ion on one channel. This channel will go into the pending state, display Pnd on the LC D , a nd N O T output a c a l l. W hen both of the paired channels have detection, the last c ha nne l to have detection will output a call until the detection for the last cha n ne l ends, even if th e de t ec t ion end s for the f ir s t channe l. N o ne o f t he t i mi n g f u nc t io ns of the f ir s t channe l with a detection will ti me (Delay, Extens ion, Max Presence, a nd Detector Disconnect) a nd the first channel w ill always operate in the Presence Mode regardless of the programming of the channel.

This feature is intended to be used in parking lot applications where vehicles can enter or exit from the same lane, freewa y ra mp s for wro ng w a y de tec t ion, a nd le ft t urn lane s whe re ot her mo ve men ts in the intersec tion te nd 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 applic ati ons.

When Directional Detect ion is turned on, a vehicle entering the first loop will cause that channel to enter t he pending state. As the vehicle enters the second loop w hile still occupying the first loop, the second channel will enter the Call state while the firs t channe l remains in t he pending s tate. A ca ll is never outp ut on the first c hannel with a detection. Under normal conditions both outputs can never be on at the same time. However, if one of the loops fail, both outputs will come on and stay on until the failure is corrected.

Basic Installation

Car enters Loop A - No call is output Car enters Loop B - No call is output

Car proceeds to Loop B Car proceeds to Loop A

Call is output on Chan nel B Call is output on Channel A

2.15 OPTION 11: AUDIBLE DETECT SIGNAL

Each c hanne l’s, A udible Detec t Sig nal set ting c an be t oggled ON or OFF b y mome ntar ily pre ssing e ither the  (UP) or  (DOWN) butto n. Only one channel can be turned ON at a time. Turning this option ON for one channel auto matically turns it OFF for the other channels. W hen this o ption is enable d (ON), a n audible signal will be activated whenever the detection zone for the selected channel is occupied. The audible signal indicates actual occupancy of the loop detection zone. Timing a nd disconnect functio ns have no e ffect on t he audible s ignal. This feature allows a technician to watch the detection zone on the street and confirm correct detector operation without having to look at the detector display as well. NOTE: This option is auto matically disabled 15 minutes after activation or on loss of power.

2.16 OPTION 12: DETECTOR DISCONNECT

Each channel’s Detector Disconnect setting can be toggled ON or O FF and the Extension ti mer toggled between ON and OFF by momenta r il y pr es sing ei t h er t he  (UP) or  (DOWN) button. The Detector Disconnect feature requires that the Phase Green Input for the channel be connected to the proper controller phase. When the Phase Green I nput is no t a c t i ve , t he c hannel s hall ope ra te no r mally. W hen the P ha s e Gr e e n I np ut is a c t iv e , t he e xt e nsion

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Detection 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

timer will start to count down at the end of each detection. If this timer reaches zero before the next detection, this channel will no longer output a call until the Phase Green Input is not active. Since the extension timer is used as a disconnect timer while in this mode, two different disconnect types are available:

Option 12.1 OFF: Extension timing still occurs and the extens ion timer is also the disc onnect timer du ring phase green. This will cause the call output to re main in the Call state until disconnect oc curs. This may allow the user to use gap times appropriate for the advance loops without considering the effects on the stop bar loops.

Option 12.1 ON: E xte ns ion timing is disabled and the extension timer is used as the disconnect timer. T his 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 ba r is not needed after any waiting queue in the associated traffic lane is movi ng during t he green p hase. The e xpected insta llation is a sto p bar loop

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

single traffic lane. This feature provides a means for keeping the stop bar loop from placing ca lls to the traffic controller after the stop bar loop has served its intended purpose during 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 that functions as the disconnect time. The channel connected to the advance detection loop would be programmed as normal.

When the Detector Disconnect feature is turned ON and the signal is not green, the channel outputs calls to the traffic controller as usual. W hen the signa l turns gree n, vehicles begin to move and eventually the stop ba r detection zone is cleared. At the time that the stop bar detection zone is cleared the disconnect timer begins to

Phase Green is the state of the light (actual Phase Green Input is inverted).

count down. If another vehicle enters the stop 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 and will not generate any further calls to the traffic controller until after the green has terminated. When the stop bar detection loop is disabled, the green phase can only be extended by vehicles detected by the advance detection loop. NOTE: The disconnect timer will always time an initial gap each time that the phase turns green. If Option 12.1 is OFF, the cha nnel will generate an o utput fo r the specified extension time at the start of each green phase.

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Section 3 Specifications

3.1 PHYSICAL

WEIGHT: 34 oz. (964 gm). S

IZE: 6.40 inches (16.25 c m) high x 2.48 inches (6.30 cm) wide x 6.38 inches (16.19 cm) long (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 are 0.062 inch thick FR4 material with 2 oz. copper on both sides and

plated through holes. Circuit board and components are conformal coated with polyuretha ne. C

ONNECTORS: MS3102A-22-14P, 19 pin male. See section 3.6 for pin assignments.

AMP 206061-1, 4 pin male. 10 foot Harness with mating connector included.

3.2 ELECTRICAL

POWER: 89 to 135 VAC, 50/60 Hz, 6 Watts maximum. L

OOP INDUCTANCE RANGE: 20 to 2500 microhenries with 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 specifications for transient

voltage protection. Each channel can tolera te, without damage, a 10 microfarad c apacitor charged to 2,000 volts being discharged directly into the loop input terminals, or a 10 microfarad capacitor charged to 2,000 volts bein g discharged between either loop terminal and earth ground.

ESET: Meets and/or exceeds NEMA TS 1-1989 detector specificat ions. The detector can be reset by re moving

and reapplying power or by changing the setting of Option 4 (Noise Filter Disab le). Each detector channel can be independently reset by pressing the CHAN button until the desired c hannel is selected, then pressing and ho lding the CHA N b ut t o n fo r t hr e e se c o nd s . A ls o, c ha n gi n g either the sensitivit y or loop fr e q uency o f a channe l will res e t that channel.

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

requirements. Application of a high state volta ge (89 to 135 V AC) to p in 1 (C h. 1) and/or pin 2 (C h. 2) a nd/or pin 3 (Ch. 3) and/or pin 4 (Ch. 4) of the 4-p in connector causes the delay timer for the channel to abort the delay timing function and also pro vides control for Phase Green Loop C ompensation, Max Presence Ti ming (End-ofGreen), Extension timing, and Detector Disconnect, if the features are programmed.

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

switched power. S

OLID STATE OUTPUT RATING: Optically isolated. 30 VD C maximum collector (drain) to e mitter (source). 100

mA maximum saturation current. 2 VDC maxi mum t rans istor sat urat ion vo lta ge. The o utp ut is p rote cted w it h a 33-volt Zener diode connected between the collector (drain) and emitter (source).

3.3 OPERATIONAL

DISPLAY: The LCD backlighting illuminates whenever any pushbutton is pressed. The backlighting will extinguish 15 minutes after the last pushbutton press.

ETECT INDICATOR: Each channel has a super bright, high intensity, red light e mitting diode (LE D) to indicate a

Call Output, Delay Timing, Extension Timing, Pending State, or Failed Loop co ndition. R

ESPONSE TIME: Meets or exceeds NEMA TS 1-1989 response time specifications. (See Section 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 self-compensating for environmental changes a nd loop drift

over t he full te mperature range and the entire loop inductance r ange. G

ROUNDED LOOP OPERATION: The loop isolatio n transformer allows operation with poor quality loops (which 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.

OOP (FAIL) MONITOR: If the to ta l in d ucta nc e o f t he c han ne l’s lo op in put ne tw or k goe s out o f t he ra n ge s pec i fied

for the detector, or rapidly changes by more than ±25 %, the channel will immediate ly e nte r t he Fail-Safe mode and

889-2103-01 Model U-1000 Operations Manual Page 8 of 26

Page 15

Respons e Time

(Option 4 O FF)

Respons e Time

(Option 4 ON)

OFF

-------

0.64%

160 ±50 ms

35 ±7 ms

0.32%

160 ±50 ms

35 ±7 ms

0.16%

160 ±50 ms

35 ±7 ms

0.08%

160 ±50 ms

35 ±7 ms

0.04%

160 ±50 ms

35 ±7 ms

0.02%

160 ±50 ms

48 ±10 ms

0.01%

160 ±50 ms

79 ±17 ms

0.005%

160 ±50 ms

138 ±28 ms

0.0025%

160 ±50 ms

261 ±51 ms

CALL

-------

NOTE: Entries in this table are based on the assumption that both channels are set to the same sensitivity. To approximate response

add these times together.

Sensitivity 6 6 6 6

Delay Time 0 0 0 0

Extens ion Time

0 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 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

display LOOP FAIL o n the L CD. The type of loop failure will a lso be displayed as L lo (for -25 % chan ge 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 following any type of reset. It is essential that multiple 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 until the channel is manually reset or power is removed. If the loop self-he als, the LOO P FAIL mess age on the LCD will extinguish and the channel will re sume operation in a normal manner; exce pt the LED w ill continue the three flashes per second display pattern, thus pro viding an alert that a prior Loop Fail condition has occurred. Each loop failure for the channel is counted a nd accumulated into the Loop Fail Me mory. 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 channel’s functions in Program Mode until the LO OP FAIL message is displayed.

3.4 TABLE: SENSITIVITY, -∆L/L, AND RESPO NSE TIME

Sensitivity -ΔL/L

time for a detector with the channels set to different sensitivities, look up the response time for each channel and divide it by two, then

Noise Filter Enabled

Noise Filter Disabled

3.5 TABLE: DEFAULT SETTINGS

Function Channel 1 Channel 2 Channel 3 Channel 4

Frequency 2 4 6 8

889-2103-01 Model U-1000 Operations Manual Page 9 of 26

Page 16

Function

Power, Neutral, 120 VAC

A Power, Neutral, 120 VAC

Channel 4 Outp ut, Relay Common

B Channel 4 Outp ut, Emit ter (Source)

Power, Line, 120 VAC

C Power, Line, 120 VAC

Channel 1 Loop Input

D Channel 1 Loop Input

Channel 1 Loop Input

E Channel 1 Loop Input

Channel 2 Loop Input

F Channel 2 Loop Input

Channel 2 Loop Input

G Channel 2 Loop Input

Chassis Grou nd

H Chassis Grou nd

Channel 3 Loop Input

J Channel 3 Loop Input

Channel 3 Loop Input

K Channel 3 Loop Input

Channel 4 Loop Input

L Channel 4 Loop Input

Channel 4 Loop Input

M Channel 4 Loop Input

Channel 1 Outp ut, Relay Normally Open

N Channel 1 Output, Collector (Drain)

Channel 1 Outp ut, Relay Common

P Channel 1 Outp ut, Emit ter (Source)

Channel 2 Outp ut, Relay Common

R Channel 2 Outp ut, Emit ter (Source)

Channel 2 Outp ut, Relay Normally Open

S Channel 2 Output, Collector (Drain)

Channel 3 Outp ut, Relay Common

T Channel 3 Outp ut, Emit ter (Source)

Channel 3 Outp ut, Relay Normally Open

U Channel 3 Outp ut, Collector (D rain)

Channel 4 Outp ut, Relay Normally Open

V Channel 4 Output, Collector (Drain)

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

Function

Power, Neutral, 120 VAC

A Power, Neutral, 120 VAC

Channel 4 Output, Relay Common

B Channel 4 Output, Emitter (Source)

Power, Line, 120 VAC

C Power, Line, 120 VAC

Channel 1 Loop Input

D Channel 1 Loop Input

Channel 1 Loop Input

E Channel 1 Loop Input

Channel 2 Loop Input

F Channel 2 Loop Input

Channel 2 Loop Input

G Channel 2 Loop Input

Chassis Ground

H Chassis Ground

Channel 3 Loop Input

K Channel 3 Loop Input

Channel 4 Loop Input

L Channel 4 Loop Input

Channel 4 Loop Input

M Channel 4 Loop Input

Channel 1 Output, Relay Normally Open

N Channel 1 Output, Collector (Drain)

Channel 1 Output, Relay Common

P Channel 1 Output, Emitter (Source)

Channel 2 Output, Relay Normally Open

R Channel 2 Output, Collector (Drain)

Channel 2 Output, Relay Common

S Channel 2 Output, Emitter (Source)

Channel 3 Output, Relay Normally Open

T Channel 3 Output, Collector (Drain)

Channel 3 Output, Relay Common

U Channel 3 Output, Emitter (Source)

Channel 4 Output, Relay Normally Open

V Channel 4 Output, Collector (Drain)

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

Wire Color

Function

Brown

Channel 1 Phase Green Input [Delay Override (120 VAC) Line]

Red

Channel 2 Phase Green Input [Delay Override (120 VAC) Line]

Orange

Channel 3 Phase Green Input [Delay Override (120 VAC) Line]

Yellow

Channel 4 Phase Green Input [Delay Override (120 VAC) Line]

connector is engaged.

3.6 TABLE: PIN ASSIGNMENTS

1200 SERIES R

ELAY OUTPUTS SOLID STATE OUTPUTS

1100 SERIES R

ELAY OUTPUTS SOLID STATE OUTPUTS

J Channel 3 Loop Input J Channel 3 Loop Input

4-PIN PHASE GREEN CONNECTOR (Mat ing harness P/N 4 15-2104-10 is included with the detector.)

NOTE: To eliminate any possibility of electric shock, this connector should only be engaged or removed when the primary MS

889-2103-01 Model U-1000 Operations Manual Page 10 of 26

Page 17

MODEL U

VEHICLE DETECTOR

FUN

CHA1 4

CHAN

FREQ

LOOP FAIL

OPTI

MAX

OFEOSCANNI

EXTENSION

SENSITIVIT

DEL

PUL

SECONDS

Phase Green Inputs DOWN Pushbutton

Toggles ON and OFF

Function Select Pushbutton

through parameters

Channel Select Pushbutton

Seven Segment Display

Parameter Description

• Timer in Operation

Bargraph

• Frequency Setting

Numbered Loop Symbols

Flashing = Program Mode

-∆L/L =

LED Indicators

Section 4 User Interface

• Vehicle Signal Strength

• 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

• Channel Displayed

•

• Call

• Delay Time in Progress

• Extend Time in Progress

• Pending Call State

• Loop Fault has Occurred

•

Press and Release

• Exit Program Mode

Press and Hold for One Second

• RESET Channel

• Press momentarily to enter

Program Mode and to step

• Decrements Values

•

4-Pin Connector to Provide Phase Green Inputs for Each Channel

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

889-2103-01 Model U-1000 Operations Manual Page 11 of 26

Page 18

FREQ KHZ

SENSITIVITY

PULSE

Section 5 Installation and Set-Up

The detector has no DIP switches or jumpers to configure. Connect an appropriately wired harness to the detector 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 avoid having t o check every setting for each channel. To reset the detector to factory defaul t, pres s and ho ld all fo ur pus hbutto n switc hes simu ltaneo usly fo r five s econds . When a ll four b uttons are depressed, the display will start count ing d own fro m five (5). Whe n the countdow n reaches zero (0), releasing the pushbuttons will reload the factor y de fau lts and reset all channels.

All operating parameters can be adjusted from the front panel. The detector continues to operate normally while it is in t he Program Mode . The value cur r ently displayed is alw ays the actua l value being use d. Exa mple: If you are changing the delay time, the time displayed at the instant that a vehicle entered the detection zone for that channel would be the value used for the delay timer.

Pressing the FUNC but to n e nt ers t he P ro g ra m M ode . The FU NC b utt o n ha s a n a ut o rep ea t f unc t io n. Th is a ll ows quick navigation to the desired parameter. T he 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 t he CHAN button will display the same para meter for the next channel. The currently selected channel is indicated at the bottom of the LCD. Pressing and holding the CHAN button for one second will exit the Program Mode and return to the Normal Mode.

Pressi ng and ho lding e ither the  (UP) or  (D OWN) b utton wi ll cause the val ue to cha nge 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 = 2, Channel 2 = 4, Channel 3 = 6, Channel 4 = 8.

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

OTES .............................Changing the frequency will reset the channe l. An unstable

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 for all channels.

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

OTES .............................Chang ing the s ensiti vity wil l reset the channel. If the chan nel is

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 all 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.

in the call state when viewing this parameter, the bargraph will show t he s tre ngt h of veh icle ca lls s o tha t t he c orre ct s ens it ivit y can be verified from this screen.

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

889-2103-01 Model U-1000 Operations Manual Page 12 of 26

Page 19

DELAY

SECONDS

EXTENSION

SECONDS

MAX PRESENCE

SECONDS

EOG 1 ON

OPTION

ON © OPTION

OFF

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

P S

ETTINGS ........................256 Selections - 0 to 255 Seconds in one-second 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 all channels.

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

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

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

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

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

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

EFAULT SETTING..........0 seconds for all channels.

XAMPLE ........................Extension of 2.5 seconds selected for channel 1.

OTES .............................This p aramet er wi ll hold the Dis conne ct ti mer va lue if O ption

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

ETTINGS ........................1000 Selections - 1 second to 999 seconds or OFF.

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

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

EFAULT SETTING..........OFF for all channels.

XAMPLE ........................Max Pres ence is t urned O F F for channel 1.

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

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 all channels.

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

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

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 all channels.

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

OTES .............................This option is a detector wide setting. Changing 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 al l channels.

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

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

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

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

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

the cha nnel ha s bee n prog ramme d with a value betw een 1 a nd

999. Operation of this feature requires that the Phase Green Inputs be correctly connected to the controller phase green circuitry.

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

889-2103-01 Model U-1000 Operations Manual Page 13 of 26

Page 20

OPTION

OFF

OPTION

ON © OPTION

OFF

OPTION

OFF

ARAMETER ...................Option 3 ( Call Ex tension 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 all channels.

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

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

ARAMETER ...................Option 4 (Noise Filter Disable).

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 all channels.

XAMPLE ........................Option 4 is turned OFF for all channels.

OTES .............................This option is a detector wide setting. Changing 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 all channels.

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

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

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 all channels.

XAMPLE ........................Option 9 is turned OFF for channels 1 and 2.

OTES .............................This is a paired channel option. 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 all channels.

XAMPLE ........................Option 10 is turned OFF for channels 1 and 2.

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

correctly connected to the controller phase green circuitry.

channel changes it for all channels. C ha nging t he sett ing of this option will reset all detector channels. It is recommended that this option be set to OFF for normal operation.

correctly connected to the controller phase green circuitry.

channel 2 and Channel 3 is paired with c hannel 4. Changing the setting for one channel also changes the setting for the paired channel. Turning ON Option 9 a utomatically turns OFF Option 10.

channel 2 and Channel 3 is paired with channel 4. Changing the setting for one channel also changes the setting for the paired channel. Turning ON Option 10 automatically turns OFF Option 9.

889-2103-01 Model U-1000 Operations Manual Page 14 of 26

Page 21

OPTION

ON © OPTION

OFF

LOOP FAIL

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 all channels.

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

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

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 all channels.

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

OTES .............................When this option is turned ON, t he value entered in Exte nsion

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

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 all channels.

XAMPLE ........................Option 12.1 is turned OFF for channel 1.

OTES .............................When this option is turned ON, t he value entered in Exte nsion

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

ETTINGS ........................Pressing the  (UP) or  (DOWN) button will c lear the Loop

ETTING DISPLAYED ......View only.

SEGMENT DISPLAY ......Loop Failures since the last time it was cle ared manually or due

EFAULT SETTING..........0 for all channels.

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

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

ARAMETER .............................Firmwar e Vers ion and Revision.

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

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

SEGMENT DISPLAY ................Model letter and fir mware version on

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

XAMPLE ..................................Model U firmware version 34,

other c ha nne ls . T ur nin g it O N for one cha n ne l tu rns it O FF fo r all other channels. T his option w ill automatically t urn OFF 15 minutes after being activated or on loss of power.

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

time is used as a Disconnect time and no extension of the call is made. When Option 12.1 is turned OFF, Extension time is active. Extension time and Disconnect time function concurrently.

Fail memo r y.

to power failure.

channel 1.

 (UP) or  (DOWN) butt on, or by resett ing the c hannel.

one screen and firmware revision on the other screen.

revision .00.

889-2103-01 Model U-1000 Operations Manual Page 15 of 26

Page 22

PRESENCE

PULSE

PRESENCE

DELAY

SECONDS

PRESENCE

EXTENSION

SECONDS

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 detection

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

ARGRAPH DISPLAY .......Number of se nsit ivit y leve ls t hat the ind ucta nce c hange cause d

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 exceeds

TATE .............................P ulse Call.

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

OTES .............................This display is only shown for 125 milliseconds (t he duration of

TATE .............................T iming De lay.

ARGRAPH DISPLAY .......Number of se nsit ivit y leve ls t hat the ind ucta nce c hange cause d

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

EXT ...............................SECONDS, DE LA Y , and PULSE or PRESEN C E.

HANNEL LED ...............Four Hz flas h rate with 50% duty cycle (125 ms ON, 125 ms

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

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

TATE .............................T imi n g E xt e nsion.

ARGRAPH DISPLAY .......OFF.

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

EXT ...............................SECONDS, EXT ENSION, and PULSE or PRESENCE.

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

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

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

NOTES .............................When Option 12.0 is ON a nd 12. 1 is O FF, the Ext ens io n ti mer

channel.

zone is unoccup ied and t he channe l does not have a ny timin g options set.

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

the detection threshold by four (4) s ensitiv ity levels and channel 1 is outputtin g a call.

outputting a call of 125 milliseconds duration.

the pulse output).

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

OFF).

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).

(2.5) seconds of Extension time remaining, and channel 1 is outputting a call.

becomes the Disconnect timer.

- for 125 milliseconds.

889-2103-01 Model U-1000 Operations Manual Page 16 of 26

Page 23

MAX PRESENCE

SECONDS

MAX PRESENCE

EOG

SECONDS

PRESENCE

L =

TATE .............................Timing Max Presence.

S B

ARGRAPH DISPLAY .......Numbe r of s ens itiv ity le vels that the inductance change caused

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

EXT ...............................SECONDS and MAX PRES EN CE.

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

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

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

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

ARGRAPH DISPLAY .......Number of se nsit ivit y leve ls t hat the ind ucta nce c hange caused

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 exceeds

TATE .............................Pending.

ARGRAPH DISPLAY .......Number of se nsit ivit y leve ls t hat the ind ucta nce c hange cause d

SEGMENT DISPLAY ......Pnd.

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

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

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

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

OTES .............................The Pe nding state is used when the channel woul d normally

TATE .............................Loop Inducta nce D ispla y (Optio n 1 ON).

ARGRAPH DISPLAY .......OFF if no vehicle is detected. Number of sensitivity levels that

SEGMENT DISPLAY ......Loop / Lead-In ci rc uit in duc ta nc e i n mic ro he nr ies . I f t he va l ue

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

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

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

XAMPLE ........................Channel 1 Loop / Lead-In circ uit i nd uct a nc e is 98 mic ro he n rie s

OTES .............................If Option 2 (-∆L/L D ispla y) is O N, th is di splay is onl y vis ible

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

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

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

flashing).

the detection threshold by five (5) sensitivity levels, Max Presence has timed out and is waiting for the End Of Green, and channel 1 is outputting a call.

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

channel.

OFF).

the detection threshold by seven (7) sensitivity levels and channel 1 is not outputting a ca ll. Either Option 9 (Third Car Passage), Option 10 (Directional Logic), or Option 12 (Detector Disconnect) has been selected.

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

the inductance change caused by the vehicle exceeds the detection threshold (firs t dot = current se nsitivity level, seco nd dot = next lower sensitivity level, etc.) if a vehicle is detected.

exceeds 999, the display will alte rnate be tween the thousand s place (1 or 2) and the lower three digits of the inductance value.

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

and channel 1 is not detecting a vehicle.

when the channel is not detect i ng a vehicle.

889-2103-01 Model U-1000 Operations Manual Page 17 of 26

Page 24

-∆L/L =

LOOP FAIL

OPTION

MAX PRESENCE

OFF

EOG

SCANNING

EXTENSION

SENSITIVITY

DELAY

PULSE

SECONDS

3 2 1

TATE .............................Loop Inducta nce -∆L/L Display (% Change) (Opt io n 2 ON).

S B

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 ........................Percentage change of ind uctance of the call on c hannel 1 is

OTES .............................This display is only visible while the channel is detecting a

TATE .............................LCD Te s t .

ARGRAPH DISPLAY .......All segments on.

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

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

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

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

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

OTES .............................This display is visible whenever two or three pushbutton

circuit.

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

0.087%.

vehicle and not timing any functions.

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

switches are pressed at the same time.

889-2103-01 Model U-1000 Operations Manual Page 18 of 26

Page 25

+25% change

-25% change

LOOP FAIL

SENSITIVITY 10 9 8 7 6 5 4 3 2 1

% of Inductanc e 0.01 0.02 0.04 0.08 0.16 0.32 0.64 1.28 2.56 5.12

The Bargraph is a window that adjusts to the sensitivity setting.

5.3 LOOP FAIL INDICATIONS

If the tota l in ducta nce of a c hanne l’s l oop input netwo rk goes o ut of t he range specified for the detector, or rapidly c hanges by more than ±25%, the channel will enter the Fail-Safe mode and LOOP FAIL will be displayed on the LCD. The type of loop failure will a ls o b e d is pla ye d a s L lo (for -25% change or shorted loop cond itions) or L hi (for +25% change or open loop conditions). This will cont inue 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 rate of three flashes per second. The LED will continue this disp lay pattern until the channel is manually reset or power is removed.

If the loop self-heals, the LOOP FAIL message on the LCD will exting uish and t he channel w ill resume operatio n in a norma l manner;

or open loop

condition.

or shorted loop

condition.

except, the LED will continue the three flashes per second display pattern, thus, providing an alert that a prior Loop Fail condition has occurred. Each loop failure is counted and accumulated into the Loop

Fail Memory. The total number of loop failures for the channel is written into the Loop Fail Memory (since the last power interruption or manua l reset) and can be seen by stepp ing thro ugh the channel’s f unctions in Program Mod e to the LOOP FAIL display.

This is a useful tool to identify intermittent loop prob lems. If the count is extremely high for the pe riod of time observed, the problem is very likely a loose connection (check for loose connections at the terminal strip and 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 t he FUNC bu tton unt il the LOOP FAIL display is shown. The Loop Fail Co un t d is p lay is aft er the OP TI ON d is pla ys . P re ss in g th e  (UP) or  (DOWN) button while the Loop Fail Count is displayed will reset the count to zero.

NOTE: The Loop Fail Count is not reset when the setting of Option 4 (Noise Filter Disable) is changed or when the channel’s sensitivity or frequency is ch anged. The prior Loop Fail indic ation will continue u ntil the Lo op Fail Count is reset to zero.

5.4 SETTING SENSITIVITY USING THE BARGRAPH

The bargraph is a graphical representation 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 segme nt rep resent s the minimu m induct ance c hange ( set b y the se nsiti vity le vel) ne cessa ry for t he channe l to o utput a cal l. Eac h addi tiona l se gment t o the r ight repre sents the induct ance c hange in exc ess o f the next se nsitivit y thresho l d . Us ually, the la r ger the vehicle, the greater 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 bar gr ap h be lo w s how s t he de fle ct io n ( 3 s egme nt s ) o f a ve h ic le w it h Se ns it iv it y se t to Le ve l 4. T he ve hic le i n the loop zone is causing a change of inductance greater than 0.32% -ΔL/Lor Sensitivity Leve l 2.

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Page 26

Step 1: Observe a

of segments displayed

Step 2: Go to the Program mode. Note

Step 3: Subtract the actual number of segments displayed

Increase the

Step 4: Verify that a

mobile causes the bargraph to move

Step 5: A small motorcycle should be

SENSITIVITY 10 9 8 7 6 5 4 3 2 1

% of Inductanc e 0.01 0.02 0.04 0.08 0.16 0.32 0.64 1.28 2.56 5.12

The Bargraph is a window that adjusts to the sensitivity setting.

PRESENCE

SENSITIVITY

The bargraph below has the same vehicle in the loop zone causing the same inductance change as above. Since the sensitivity setting was increased to Level 7, six segments are now dis played. If the bargraph displays 5 or 6 segments for a vehicle in the loop and motorcycles are not a concern, the sensitivity has been set to the proper range.

5.5 SETTING SENSITIVITY FOR MOTORCYCLE DETECTION USING THE

BARGRAPH

The bargraph can also be used to select the proper sensitivity level for small motorcycle detection. The relative 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 automobile automatically sets the sensitivity to detect small motorcyc les. Follow the steps below:

single standard automobile in the loop zone. Note the number

on the bargraph. (4)

Note: This method applies to conventional loop configurations only. Other loop configurations, such as Quadrupole

the sensitivity level. (3)

from the desired number of 7. (7 - 4 =

sensitivity thr ee levels.

, will require a different method to cor rectly set sensitiv ity for motorcycle detec tion. Increasing the sensitivity to detect motorcycles in some loop configurations will make the loop sensitive to adjacent lane detection. If adjacent lane traffic is detecte d, the phas e will max time when no vehicles are present in the loop (see Option 5 - Phase Green Loop Compensation for a possible solution).

5.6 FULL RESTORE TO FACTORY DEFAULT SETTINGS

Pressing all four front pane l switches s imultaneo usly and c ontinuo usly for five (5 ) seconds resets t he detecto r 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 of the front panel switches simultaneously will turn on all possible symbols and messages on the LCD.

889-2103-01 Model U-1000 Operations Manual Page 20 of 26

single standard auto-

seven segments.

detected causing a one segment deflection.

Page 27

Channel 1

Loop

Non-volatile

Channel 2

Loop

Isolation

Loop

Oscillator

Channel 3

Loop

Isolation

Loop

Oscillator

Channel 4

Loop

Squaring Circuit

DETECT

Ch. 1 Phase Green Input

LCD

Ch. 2 Phase Green Input

Ch. 3 Phase Green Input

Ch. 4 Phase Green Input

120 VAC

+5 VDC

GND

Front Panel

32 MHz

Oscillator

Detect

Loop

Capacitors

Loop

Capacitors

Loop

Section 6 Block Diagram

Loop Inputs

Input

Power

Isolation

Power

Supply

Oscillator

Capacitors

Micro Controller

Memory

LEDs

Push Button

Switches

Outputs

889-2103-01 Model U-1000 Operations Manual Page 21 of 26

Page 28

Section 7 Theory of Operation

The Reno A & E Model U-1000 d e te c t or d i gi tally mea s ur es changes in the reso nant fre quency of fo u r i n de p e nd e nt loop circuits to determine if a vehicle has entered the detection zone. The Model U -1000 Series detector applies an excitat ion vo ltage t o each lo op circ uit re sultin g in the loops os cillat ing at t heir re sonant freque ncy. The curre nt flow in the loop wire creates ma gnetic fields a round the loop w ire. When a vehicle pa sses over the loop area, the conductive metal of the vehicle causes a loading of the loop’s magnetic fields. The loading decreases the loop inductance, which causes the resonant frequency to increase. By continuously sampling the loop’s resonant freque ncy, the magnitude and rate of change can be determined. If the frequency change exceeds a selectable thres hold (se t b y the s ens it ivit y se tt ings) , t he c han nel w il l act iva te a n out pu t sig na l. I f the r ate of c ha nge is s low, typical of environme ntal drift, t he cha nne l wi ll co nt in uous l y t ra ck and c o mpe nsa te fo r t he c ha nge . The Mo d el U 1000 detector also monitors the loop frequency for out of range conditions such as an open or shorted loop circuit.

The Model U-1000 detector is a sca nning detector. The sca nning metho d se quent ial ly tu rns e ach c hanne l’s loop oscillators on and off. Each channel’s os cillator circuit supplies the e xcitation voltage that is coup led to the loop circuit by a loop isolation transformer. The channel’s oscillator circuit supplies the excitation voltage that is coupled to the loop circuit by a loop isolation transformer. The tra nsformer pro vides high co mmon mode iso lation between the loop and detector electronics , which allows the channel to o perate on poor quality loops including a single short to gro und. The transformer also limits the a mount of static energy (lightning) that ca n transfer to the detector electronics. A spark gap transient suppression device is connected across the loop inputs connected to the isolat ion trans for mer . This device dissipates static charges before they reach the transformer. A network of four capacitors is connected to the detector side of the isolation transformer. Three of the capacitors can be switched in or out of the oscillator circuit to shift the frequency of the loop oscillator circuit thus providing frequency separation between adjacent loops. The three switchable capacitors are electronically switched using FETs and are select ed when p rogram ming parameter values with the front panel pushbutto n switches.

The outputs from the four loop oscillators are tied together and fed into a co mmon 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 t ime. The sine wave fro m the loop oscillator circuit is squared to provide a precise zero cross ing signal for the input to the microcontroller. This s ignal is called the loop sa mple. The loop sample is an integral number o f complete oscillations from the loop oscillator circuit. The number of loop oscillations c ounted is a function of the selected sensitivity setting for the channel. The required nu mber 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) cr ystal clock pulses generated by the microc ontroller’s internal high-speed crystal oscillator. The number of crystal clock pulses accumulated during consecutive loop samples is compared to the internal reference number of crystal clock pulses stored in the microcontroller’s memory.

When a vehicle enters the loop zone the loop inductance decreases. This decrease in loop inductance causes an increa se in t he loop osc illat or fre que ncy. In turn, an increase in loop oscillator frequency results in a decrease of the time period for the loop sample. Hence, when a vehicle enters the loop zone the number of crystal clock pulses accumulated during a loop sample period decreases. By comparing t he new count with the reference count, a percentage change can be calculated 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 by environmental fluctuations are tracked and automatically compensated for.

The microcontroller uses the high-speed crystal 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 pushbutton switch selections for the LCD and stores the operating parameters in non-volatile memory. Stored parameters are only changed wit h the front pa nel switches a nd are unaffected by los s o f power or channel reset. The microcontroller continuo usly processes the loop samples and the detect or operation is not affected during the operation of the switches or the LCD. (Note: When e ither channel’s sensitivity o r frequ ency is change d, that channel is reset .)

In add ition, the microc ont rolle r co nditi ons the out puts base d on P hase G ree n Inpu ts and the pr ogra mme d sett ings of the various t imers (De lay, Ext ension, and Max Presence ) and opt ions (EOG, Option 3, Option 4, Opt ion 5, Option 9, Option 10, and Option 12).

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Page 29

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 L oop Fail.

The channel detect LED is flashing three times per

second and channel appears to be working correctly.

Detector intermittently 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.

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

(Option 12.0) has been tu rned on.

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 sensitivity for the c hannel has been set to Call for cing the c hannel to

output a constant call.

Section 8 Maintenance and Troubleshooting

The Reno A & E Model U-1000 Detector requires no mainte nance. If you are having problems w ith your Model U-1000 detector, use the troubleshooting chart below to help determine the cause of the problem.

See Troubleshooting Initialization Problems.

See Troubleshooting Loop Fail Problems.

See Troubleshooting Intermittent Loop Fail Problems.

LCD disp lays Pnd and a ch annel doe s not output a call.

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 Po wer Supp ly voltage. Is it greater than 89 VAC and less than 135 VAC ?

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

YES, Swap the detector with a working detector. Did the problem 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. Replace the unit.

YES, Probably not a power related problem.

8.2 TROUBLESHOOTING INITIALIZATION 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 display the Model and Firmware 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 displayed on the LC D?

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

Off, or a Loop Fail message displayed on the LCD?

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

YES, Replaced unit was defective.

YES, The unit is initializing correctly.

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Page 30

8.3 TROUBLESHOOTING LOOP FAIL PROBLEMS

Check e ach c hanne l’s s tat us by mo ment ar ily pre ssi ng the C HAN butt on to s tep t hro ugh the cha nnels . Do a ny of the channels d isplay L hi and Loop Fail?

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

NO, All 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 block in the cabinet. Does the status of that channel now show L hi Loop Fail?

NO, The problem is in the cabinet. Replace the detector with a known good unit. Does t he 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 t he connec tor. It s hould read less than 0 .5 Ohms for both terminals. Check all wiring from terminal block to the connector in the harness. Also, check that the connector itself is not defective.

YES, The replaced unit was defective.

YES, The problem is in the field, either a short 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 grou nd. Is the r esistance greater than 50 megOhms?

NO, There is leakage to earth ground in the loop / lead-in circuit. 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 insufficie nt inductance in the loop / lead-in circuit.

This ind icates too fe w turns in the loo p itself or some of the turns are shorted to each other. In either case, the loop must be replaced to correct the problem.

YES, If a cha nne l is not be ing us ed, you wil l se e this dis pla y if the cha nne l has not be en tu rne d of f. Is there a loop connected to this channel?

NO, Chan ge the channel’s sensitivity setting to OFF and the Loop Fail message will no longer be displayed for the channel.

YES, There is an open or high resistance in the loop / lead-in circuit. Short across the loop inputs on the t erminal b lock in the cabinet. Does the status of that channel now s how L lo Loop Fail?

NO, The problem is in the cabinet. Replace the detector with a known good unit. Does t he s t atus of t ha t channe l no w show L lo Loo p Fail with the short still ap plied 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 s hould read less than 0.5 Ohms for both terminals. Check all wiring from terminal block to the connector in the harness. 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 cir c uit ( fro m o ne lead 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 O hms?

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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Page 31

NO, This is typic ally cause d by having too many t urns in 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 hannel is preferred. Or try a parallel wiring arrange ment for the loops if separate detection channels are not possible.

8.4 TROUBLESHOOTING INTERMITTENT LOOP 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 / le ad-in circuit, or loose co nnections or bad s older 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 t han 50 megOhms. I nspect the loop. Look for exposed wires or debris pressed into the saw cut. Tighten all screw terminals in the signal cabinet that the loop circuit uses. Check solder joints in the loop circuit, especially on the harness itself. Disconnect and reconnect any connector used in the loop circuit and check for loose pins and sockets in these c onnect ors. If your ca binet ha s ligh tning or surge s uppres sion de vices on the lo op inp uts in the cabinet, remove or replace them. Check for places in the field where the loop wire or lead-in cable ma y be pinched or chaffed. Look for wires pinched under j unction box covers 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 h i?

NO, The display must have bee n L lo then. This indica tes an intermittent shorted loop or -

25% inductance change. Using a Me gO hm 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 the 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% inductance change. 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. Tighten all screw terminals in the s ignal cabinet that t he loop circuit uses. Check solder joints in the loop circuit, especially on the harness itself. Disconnect and reconnect any connector used in the loop c ircuit and check for loose pins and socke ts 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 display while the loop failure was occurring.

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 pos sible causes and

the short duration of the symptom (usually less than 30 minutes). I f the problem occurs more frequently in the morning or when raining, s uspect a short to ea rth ground in t he loop / lead-in circuit. This can usually be verified by testing with a MegOhm meter but not always. Vibration can also be a possible cause. Loop wires may be moving slightly in a conduit due to vibrations from truck traffic. Utility lids in the street near the loop may 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 lengths are not excessive. And also see loop failure that displays L lo on the LCD.

YES, See Troubleshooting Intermittent Loop Fail Problems and follow the path for a loop failure that displays L lo o n the LCD.

Troubleshooting I ntermittent Loop Fail Pr oblems and follow the path for a

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Page 32

8.6 TROUBLESHOOTING DELAY PROBLEMS

Does the channel ever time the Delay function?

NO, Is the P has e Gr ee n Inp ut, for t he c hanne l ha vin g a prob lem, connected to a po int 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

the Delay function now time?

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

NO, The problem is in the wiring from the phase green to the wiring 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 point you are using to get phase green is always at a high pote ntial

(great er than 89 VAC) or the phase actually is green all of the time.

YES, Reme mber that t he d e lay funct i o n is o n ly availa b le w hen the Pha s e Gr e e n I nput is be lo w 89 V AC . If you want the delay function available all of the time, disconnect the Phase Green Input. If 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-linke d Polyet hylene insu lation (insulation type XLPE) for loo p wire. Typical sensing height is ⅔ of the shortest leg of a loo p. Therefore, a 6΄ x 6΄ loop will have a detection heig ht 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 configuration would have an indu c tance 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

889-2103-01 Model U-1000 Operations Manual Page 26 of 26

Reno A&E U-1000 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Section 1 General Description

Section 2 General Characteristics

2.1 LOOP FREQUENCY

2.2 SENSITIVITY

2.3 PRESENCE / PULSE

2.4 CALL DELAY

2.5 CALL EXTENSION

2.6 MAX PRESENCE TIMER

2.7 END-OF-GREEN (EOG)

2.8 OPTION 1: LOOP INDUCTANCE DISPLAY

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

2.10 OPTION 3: CALL EXTENSION CONTROL

2.11 OPTION 4: NOISE FILTER DISABLE

2.12 OPTION 5: PHASE GREEN LOOP COMPENSATION

2.13 OPTION 9: THIRD CAR PASSAGE

2.14 OPTION 10: DIRECTIONAL LOGIC

2.15 OPTION 11: AUDIBLE DETECT SIGNAL

2.16 OPTION 12: DETECTOR DISCONNECT

Section 3 Specifications

3.1 PHYSICAL

3.2 ELECTRICAL

3.3 OPERATIONAL

3.4 TABLE: SENSITIVITY, -∆L/L, AND RESPO NSE TIME

3.5 TABLE: DEFAULT SETTINGS

3.6 TABLE: PIN ASSIGNMENTS

Section 4 User Interface

Section 5 Installation and Set-Up

5.1 PROGRAM MODE DISPLAY SCREENS

5.2 NORMAL MODE DISPLAY SCREENS

5.3 LOOP FAIL INDICATIONS

5.4 SETTING SENSITIVITY USING THE BARGRAPH

SENSITIVITY

5.6 FULL RESTORE TO FACTORY DEFAULT SETTINGS

5.7 DISPLAY TEST

Section 6 Block Diagram

Section 7 Theory of Operation

Section 8 Maintenance and Troubleshooting

8.1 TROUBLESHOOTING POWER PROBLEMS

8.2 TROUBLESHOOTING INITIALIZATION PROBLEMS

8.3 TROUBLESHOOTING LOOP FAIL PROBLEMS

8.4 TROUBLESHOOTING INTERMITTENT LOOP FAIL PROBLEMS

8.5 TROUBLESHOOTING INTERMITTENT DETECTOR LOCK -UPS

8.6 TROUBLESHOOTING DELAY PROBLEMS

8.7 THINGS TO KNOW ABOUT LOOPS