Nortech PD130TD136 Vehicle Detector User Manual 301UM0030 01a PD130 Enhanced Vehicle Detector

Nortech International (PTY) LTD Vehicle Detector 301UM0030 01a PD130 Enhanced Vehicle Detector

User Manual

 Nortech International (Pty) Ltd PO Box 4099  32A Wiganthorpe Road Willowton Hub  Pietermaritzburg Pietermaritzburg  3201 South Africa 3200 South Africa   Reg. No: 98/1095  Tel: (033) 345 3456  Int. Tel: +27 33 345 3456 Fax: (033) 394 6449  Int. Fax: +27 33 394 6449 Email: mkt@nortech.co.za  URL: www.nortech.co.za                                    PD130 Enhanced  Vehicle Detector User Manual         NORTECH INTERNATIONAL (PTY) LTD All rights reserved Copyright © 2009 Document Number: 301UM0030_01 Date of Issue: September 2009 This document is for information only and unless otherwise indicated, is not to form part of any contract.  In accordance with the manufacturer’s policy of continually updating and improving design, specifications contained herein are subject to alteration without notice.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 2 of 29   Table of Contents  1. INTRODUCTION........................................................................................................................................5 2. TECHNICAL DATA ...................................................................................................................................6 2.1 Functional Data ......................................................................................................................................6 2.2 Electrical Data ........................................................................................................................................7 2.3 Environmental Data................................................................................................................................7 2.4 Mechanical Data.....................................................................................................................................7 2.5 Approvals................................................................................................................................................8 3. OPERATING PROCEDURE......................................................................................................................9 3.1 Hardware Set-Up....................................................................................................................................9 3.2 Switch Setting Selections .......................................................................................................................9 3.2.1 Frequency Switch............................................................................................................................9 3.2.2 Sensitivity ......................................................................................................................................10 3.2.3 Automatic Sensitivity Boost...........................................................................................................10 3.2.4 Filter Mode ....................................................................................................................................10 3.2.5 Pulse Relay ...................................................................................................................................10 3.2.6 Presence Time ..............................................................................................................................10 3.2.7 Reset Switch .................................................................................................................................11 3.3 Power Fail (Option)...............................................................................................................................11 3.4 Front Panel Indicator ............................................................................................................................11 4.  PRINCIPAL OF OPERATION .................................................................................................................12 4.1 Detector Tuning....................................................................................................................................12 4.2 Detector Sensitivity...............................................................................................................................12 4.3 Modes of Operation..............................................................................................................................13 4.4 Response Times...................................................................................................................................13 5. INSTALLATION GUIDE ..........................................................................................................................14 5.1 Product Safety Requirements...............................................................................................................14 5.2 Operational Constraints........................................................................................................................14 5.2.1 Environmental Factors to Consider...............................................................................................14 5.2.2 Crosstalk .......................................................................................................................................15 5.2.3 Reinforcing ....................................................................................................................................15 5.3 Loop and Feeder Specification.............................................................................................................15 5.4 Sensing Loop Geometry.......................................................................................................................16 5.5 Loop Installation ...................................................................................................................................16 6. CONFIGURATION...................................................................................................................................18 6.1 PD131 Enhanced Detector - Order number 301FT0119 .....................................................................18 6.2 PD132 Enhanced Detector - Order number 301FT0101 .....................................................................19 6.3 PD134 Enhanced Detector - Order number 301FT0122 .....................................................................19 7. APPLICATIONS ......................................................................................................................................20 8. CUSTOMER FAULT ANALYSIS ............................................................................................................21 8.1 Fault Finding.........................................................................................................................................21 8.2 DU100 – Detector  Diagnostic Unit ......................................................................................................22 8.3 Interpretation of DU100 Readings........................................................................................................22 8.3.1  Frequency ......................................................................................................................................................22 8.3.2   Frequency drift ..............................................................................................................................................23 8.3.3   Sensitivity ......................................................................................................................................................23 8.3.4   Time ..............................................................................................................................................................23 8.3.5   Crosstalk .......................................................................................................................................................24 8.4 Functional Test.....................................................................................................................................24
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 3 of 29    APPENDIX A - FCC ADVISORY STATEMENT ................................................................................................25 APPENDIX B – INSTALLATION OUTDOORS..................................................................................................26 Appendix B.1 IEC 60950-22:2005 – Outdoor cabinet..................................................................................26 Appendix B.2 IEC 60950-22:2005 - Northern Europe .................................................................................26 Appendix B.3 IEC 60950-1:2005 – Overvoltage Category ..........................................................................26 APPENDIX C –REQUEST FOR TECHNICAL SUPPORT FORM.....................................................................27
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 4 of 29   WARNING: 1.  This unit must be earthed!  WARNING: 2.  Disconnect power before working on this unit!  WARNING: 3.  Installation and operation by service personnel only!  WARNING: 4.  No user serviceable parts inside. Only service personnel may open the unit to change internal settings. Warranty void if cover removed!  WARNING: 5.  Always  suspend  traffic  through  the  barrier  area  during installation  and  testing  that  may  result  in  unexpected operation of the barrier.  WARNING: 6.  USA FCC  Advisory  Statement  –  Refer  to  Appendix  A  at  the end of this document.  WARNING: 7.  Europe Disposing of the product:  This electronic product is subject to the  EU  Directive  2002/96/EC  for Waste  Electrical  and  Electronic Equipment  (WEEE).  As  such,  this product must not be disposed of at a  local  municipal  waste  collection point.  Please  refer  to  local regulations for directions on how to dispose  of  this  product  in  an environmental friendly manner.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 5 of 29   1.  INTRODUCTION   The PD130 Enhanced Vehicle Detector is a single channel microprocessor based detector designed specifically  for  parking  and  vehicle  access  control  applications.  The  PD130  Enhanced  Vehicle Detector has been designed using the most up-to-date technology in order to meet the requirements of a vast number of parking applications (in terms of operating conditions and options available to the user.)  The primary function of the detector is to detect vehicle presence by means of an inductance change, caused by the vehicle passing over a wire loop buried under the road surface.  The  detector  has  been  designed  for  ease  of  installation  and  convenience.  The  various  modes  are selected by changing the positions of the switch on the front of the unit.  The switches allow for different loop frequency settings, sensitivity settings and mode settings.  The PD130 Enhanced Vehicle Detector provides visual output (LED) on the front of the enclosure and relay change-over contacts are taken on the 11 pin connector at the rear of the enclosure. The LED indicates the power has been applied to the unit, that a vehicle is present over the loop and if there is a fault on the loop. The Presence relay is fail-safe and will close on a vehicle detect or in the event of power failure or a loop fault.  Related Documents:  Data Sheet           Document No. 301DS0010 Installation Leaflet        Document No. 300LF0006 Diagnostic Unit DU100 User Manual     Document No. 895UM0001
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 6 of 29   2.  TECHNICAL DATA  2.1  Functional Data   Tuning          Fully Automatic   Self-tuning range      20 µH to 1500 µH   Sensitivity        Four step switch selectable            High     0.02 %∆L/L            Medium High   0.05 %∆L/L            Medium Low   0.10 %∆L/L            Low     0.50 %∆L/L   Frequency        Four step switch selectable            Frequency dependent on loop size   Automatic Sensitivity Boost    Switch selectable   Filter          Switch selectable 2 second filter   Presence Relay       Fail-safe  Presence Time        Switch selectable:  Limited presence                  Permanent presence  Pulse Relay        Switch selectable:  Pulse on detect                  Pulse on undetect   Pulse Output Duration      150 milliseconds   Response Times      100 milliseconds   Detect Outputs        Relays rated – 5 A @ 230 VAC            Optional – Opto Isolated 50mA @ 30 VDC            Drift Compensation Rate    Approx. 1 %∆L/L per minute   Visual Indications      1 x Power LED - Red            1 x Channel Status LED - Green   Reset          Push button on front of enclosure    Surge protection      Loop isolation transformer, gas discharge tubes and Zener             diode clamping on loop input  Power Fail (Option)      10 minutes memory retention of detector state on power             failure.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 7 of 29   2.2  Electrical Data   Power requirements      12 V -10% to 24 V +10% (PD134)            120 VAC ± 10% (48 to 62Hz)            230 VAC ± 10% (48 to 62Hz)            Requirement: 1.5 VA Maximum @ 230 V  Relay Contact Rating      Relays rated – 5 A @ 230 VAC            Optional – Opto Isolated 50mA @ 30VDC       For ambient temperatures above 60°C De-rate the rel ay             Maximum current as per graph below             2.3  Environmental Data   Storage Temperature      -40°C to +80°C   Operating Temperature     -40°C to +70°C   Humidity        Up to 95% relative humidity without condensation   Circuit protection      Conformal coating over the PCB and all components  IP Rating        IP30  2.4  Mechanical Data   Housing Material      ABS blend   Mounting Position      Shelf or DIN rail mounting   Connections        11-pin Submagnal (JEDEC No. B11-88)   Size of Housing       78mm (H) X 41mm (W) X 80mm (D)            80 mm75.9 mm77.7 mm40.6 mm
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 8 of 29  2.5  Approvals  CE Regulations:   EN 301 489-3    Equipment Type: III              Class of Equipment: 2         EN 50293    Performance Criteria B  Safety:      IEC / EN 60950 -1
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 9 of 29   3.  OPERATING PROCEDURE  3.1  Hardware Set-Up  The  PD130  Enhanced  Vehicle  single  channel  parking  detector  is  designed  to  be  shelf  or  DIN  rail mounted, with the controls and visual indicators at the front, and wiring at the rear of the enclosure.  The power, loop and relay outputs are all connected to the single 11-pin plug, which is mounted at the rear of the enclosure.   3.2  Switch Setting Selections    3.2.1  Frequency Switch  The frequency switches are the lower two switches, switches No. 1 and 2. There are four frequency selections:  SW2  SW1   Off  Off  High On  Off  Medium-High Off  On  Medium-Low On  On  Low  The  frequency  switches  allows  the  operating  frequency  of  the  loop  to  be  shifted  higher  or  lower depending on the switch position. The frequency of the loop is determined by the loop size, and the frequency of the switch simply causes a frequency shift on the loop.  Where more than one detector is used the detectors must be set-up to ensure that there is no cross-talk (interference) between the detectors. This can be achieved by ensuring that the loops of the two detectors  are  spaced  sufficiently  apart  (approximately  2  metres  between  adjacent  edges)  and  also ensuring that the detectors are set to different frequencies. As a general rule, the detector connected to the inductive loop with the greatest inductance should be set to operate at the lowest frequency. Loop inductance increases as loop size, number of turns in the loop and feeder length increases.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 10 of 29   3.2.2  Sensitivity  The  sensitivity  of  the  detector  allows  the  detector  to  be  selective  as  to  the  change  of  inductance necessary to produce a detect. There are four sensitivity selections:  SW4  SW3   Off  Off  High On  Off  Medium-High Off  On  Medium-Low On  On  Low  3.2.3  Automatic Sensitivity Boost  Automatic sensitivity boost is a mode which alters the un-detect level of the detector. This mode is selected by Switch No. 5 on the front of the enclosure:  SW5   Off  Disabled On  Enabled  Automatic sensitivity boost causes the sensitivity level to be boosted to a maximum on detection of a vehicle, irrespective of current sensitivity level and maintained at this level during the entire presence of the vehicle over the loop. When the vehicle leaves the loop and the detection is lost, the sensitivity level reverts to the pre-selected level.  3.2.4  Filter Mode  The filter mode is selected with the mode Switch No. 6 shown below. The filter produces a delay turn-on time of two seconds when a vehicle occupies the loop. This is to enable small, unwanted objects to pass over the loop without being detected. The filter option may be used on any sensitivity setting.   SW6   Off  Disabled On  Enabled  3.2.5  Pulse Relay  The pulse relay may be made to operate on detect (entry) or on undetect (exit) of a vehicle. This option is selected with Switch No. 7:   SW7   Off  Pulse on Detect On  Pulse on Undetect  3.2.6  Presence Time  The presence time may be set to permanent presence or to limited presence.  In permanent presence mode the detector will continuously compensate for all environmental changes whilst there is a vehicle present over the loop. The presence mode is set with Switch No. 8:  SW8   Off  Limited Presence On  Permanent Presence
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 11 of 29   3.2.7  Reset Switch  The  detector  automatically  tunes  to  the  inductive  loop  connected  to  it  when  the  power  is  applied, whether on initial installation or after any break in power supply. Should it be necessary to retune the detector, as may be required after changing any of the switches or after moving the detector from one installation  to  another,  momentary  operation  of  the  RESET  switch  will  initiate  the  automatic  tuning cycle.  3.3  Power Fail (Option)  The detector is able to retain the output state for a power failure of not greater than 10 minutes. Thus, when  the power  is  restored,  the  detector  will  not  re-tune  but  return to  the  detect  state  prior  to the power failure. If a vehicle was on the loop during power failure, it will remain detected when power is restored.  3.4  Front Panel Indicator  While the detector is tuning, the ON (Red) LED will glow .The OUTPUT LED (Green) will extinguish when the system is tuned. The green LED will flash at a rate of 1 Hz during tuning. This is used to indicate the frequency of the loop to the user. Every flash of the LED is equivalent to 10 kHz. It will stop when the operating frequency is reached.  This operation is also performed whenever the reset button is depressed.  The  ON  (Red)  LED  will  glow  permanently  to  indicate  that  the  unit  is  functional.  The  red  LED  also serves as an optical interface to the DU100 Diagnostic Unit.  If faults exist with the loop the green LED will come on and flash off at the rate of 2Hz indicating the fault.  If  the  fault  is  self-healing  the  detector  will  continue  to  operate  but  the  LED  will  remain  on, indicating to the user that a fault has occurred.  The LED will go off for a moment during an undetect indicating this, thereafter returning on. This condition can be restored by removing the power or by depressing the reset button.  The green LED will also glow whenever a vehicle is detected passing over the inductive loop.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 12 of 29   4.   PRINCIPAL OF OPERATION  The inductive loop vehicle detector senses the presence of a vehicle over an area defined by a loop of two or more turns of wire, laid under the road or pavement surface. This loop of wire is connected to the detector by a twisted pair of wires called a loop feeder.  A vehicle passing over a sensing loop causes a small reduction in the inductance of the loop, which is sensed by the detector. The sensitivity of the detector is adjustable to accommodate a wide range of vehicle types, as well as different loop and feeder combinations.  Upon detection of a vehicle passing over the loop the detector operates its output relays, which may be used to indicate controls associated with the installation.   4.1  Detector Tuning  Tuning of the detector is fully automatic. When power is applied to the detector upon installation of the system, or when a reset is initiated, the detector will automatically tune itself to the loop to which it is connected. The detector will tune to any loop with an inductance in the range 20 to 1500 micro-henries (µH).  This  wide range  ensures  that  all  loop  sizes  and  feeder  combinations  will  be  accommodated  in  the tuning range of the detector.  Once tuned, any slow environmental change in loop inductance is fed to a compensating circuit within the detector, which keeps the detector correctly tuned.  4.2  Detector Sensitivity  Sensitivity of the detection system is dependent on factors such as loop size, number of turns in the loop, feeder length and the presence of metal reinforcing beneath the loop.  The nature of the application determines the required sensitivity, which may be adjusted by means of the sensitivity switches on the front of the enclosure.  Sensitivity levels of the PD130 Enhanced Vehicle Detector have been carefully optimised for parking and vehicle access control applications. The detection of small unwanted objects such as bicycles and trolleys  can  be  eliminated  by  selecting  lower  sensitivity  levels  whilst  high-bed  vehicles  and vehicle/trailer combinations will not lose detection by using Automatic Sensitivity Boost (ASB) option.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 13 of 29    ASB operates as follows: When ASB is disabled, the un-detect level is dependent on the sensitivity setting of the detector. Hence as the detector is made less sensitive, the un-detect level will  reduce  accordingly.  When  the  ASB  is  enabled  the  un-detect  level  is  fixed  irrespective  of  the sensitivity  setting  and  will  be  equivalent  to  the  un-detect  level  when  the  sensitivity  is  on  maximum setting.   4.3  Modes of Operation  In the presence mode the detector will give a continuous output during the presence of a vehicle over the inductive loop. As the detector is designed with the permanent presence feature, the detector will indicate vehicle presence for an unlimited period of time. If the permanent presence is not selected, then the detect time will be dependent on the change of inductance. The presence time on the limited presence setting will be approximately 1 hour for 3% ∆ L/L.  The  pulse  relay  outputs  a  pulse  of  150  milliseconds  duration.  When  set  to  “pulse  on  detect”  the detector will give a pulse on detection of a vehicle. When set to “pulse on un-detect” the detector will give a pulse output when the vehicle leaves the loop.  The presence output is known as a fail-safe output. This implies that in the event of a power failure the detector will give a detect output. The pulse outputs are not fail safe and will not operate if a failure occurs.  4.4  Response Times  The response time of the detector is the time taken from when a vehicle moves over the loop to when the detector gives an output.  The  response  times  of  the  PD130  Enhanced  Vehicle  Detector  has  been  adjusted  to  prevent  false operation in electrically noisy environments, but retain adequate response to vehicles in parking and vehicle access control applications.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 14 of 29   5.  INSTALLATION GUIDE  Optimum  functioning  of  the  detector  module  is  largely  dependent  on  factors  associated  with  the inductive sensor loop connected to it. These factors include choice of material, loop configuration and correct  installation  practice.  A  successful  inductive  loop  vehicle  detection  system  can  be  achieved bearing the following constraints in mind, and strictly following the installation instructions. The detector must be installed in a convenient weatherproof location as close as possible to the loop.   5.1  Product Safety Requirements  • WARNING:   The unit must be EARTHED.  • WARNING:   Disconnect the power before working on the unit.  • WARNING:   On 120 VAC and 230 VAC models a readily accessible disconnect device  must be incorporated into the mains wiring (as per EN60950 Section 1.7.2).  • WARNING:   On all models the power supply to the unit MUST have short circuit protection and over current protection installed at the power supply source (As per EN 60950 section 1.7.11). Typically this will be a 5 Amp Magnetic Circuit Breaker for AC models and a fuse for DC models.  • WARNING:   This product must be installed in an enclosure as the IP rating of the detector  is IP 30.  • WARNING:   No user serviceable parts inside. Warranty void if cover removed. ONLY  SERVICE PERSONNEL  MAY OPEN  THE  UNIT TO  CHANGE  THE INTERNAL SETTINGS.  • WARNING:   Only use CE approved 11 pin relay bases such as Nortech Part No.  CTR119090 or equivalent.  As  an  alternative  to  the  11  pin  relay  base,  Nortech  has  a  11  pin  wiring harness,  Nortech  Part  No.  301FT0041,  which  can  only  be  used  in  SELV voltage (less than 60 VDC or less than 42 VAC) applications.   5.2  Operational Constraints  5.2.1  Environmental Factors to Consider  Even though the PD130 Enhanced Vehicle parking detectors are housed, the system integrator MUST ensure that the detector is installed in a housing/fire enclosure to protect it from the environment.  The PD130 Enhanced Vehicle parking detectors are rated to operate over the industrial temperature range but the rate of temperature change MUST not exceed 1°C per minute. This system integrator MUST ensure that the housing used complies with this rate of temperature change requirement.  For installation Outdoors refer to Appendix B.  For additional information on Environmental Factors refer to the section “Environmental Influences to Design Parameters” in the “Loops and Loop Installations” Manual, Nortech Document No. MKT05.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 15 of 29  5.2.2  Crosstalk  When two loop configurations are in close proximity, the magnetic fields of one can overlap and disturb the field  of  the  other.  This  phenomenon, known  as  crosstalk, can  cause  false detects  and  detector lock-up.  Crosstalk between adjacent loops operating from different detector modules can be eliminated by:  1.  Careful choice of operating frequency. The closer together the two loops, the further apart the frequencies of operation must be.  2.  Separation between adjacent loops. Where possible a minimum spacing of 2 metres between loops should be adhered to.  3.  Careful screening of feeder cables if they are routed together with other electric cables. The screen must be earthed at the detector end only.  4.  Running feeder cables in their own slots, separated by at least 300mm  For  additional  information  on  Crosstalk  refer  to  the  section  “Crosstalk  Prevention”  in  the DU100 Diagnostic Unit User Manual Nortech Document No. 895UM0001.  5.2.3  Reinforcing  The existence of reinforced steel below  the road surface has the effect of reducing the inductance, and  therefore  the sensitivity,  of  the  loop  detection  system.  Hence,  where  reinforcing  exists  2  turns should be added to the normal loop, as referred to in section 5.4.  The spacing between the loop and steel reinforcing should be greater than 150 mm, although this is not always practically possible. The slot depth should be kept as shallow as possible, taking care that the feeder remains exposed after the sealing compound has been applied.  5.3  Loop and Feeder Specification  Extensive studies have been undertaken over the years by various agencies around the world in order to ascertain the optimum loop installation materials.  As an insulated conductor is a prerequisite, PVC covered cable has been used for many years as a first choice, but tests have shown, in fact, that this is unsuitable for long term installations. The PVC tends  to  become  porous  with  the  result  that  adjacent  loops  become  electrically  coupled  to  one another, with resultant crosstalk implications. Instability and susceptibility to electrical interference can also result.  The  insulation  must  withstand  wear  and  abrasion  from the shifting streets, moisture, and attack by solvents and oils, as well as withstand the heat of high temperature sealants.  Silicone  insulated cable  has  emerged  as  one of the preferred  insulation  materials.  Other  insulation materials are rubber, thermoplastic, synthetic polymer and cross linked polyethylene.  Stranded loop wire is preferred over solid wire. Because of its mechanical characteristics, a stranded wire is more likely to survive bending and stretching than a solid.  A heavy gauge conductor is definitely desirous in order to maintain the loop Q-factor. The loop and feeder should preferably constitute a single length of insulated multi-stranded copper conductor, with no  joints  and  with  the  copper  having  a  minimum  cross  section  1.5  mm2.  The  feeder  is  twisted  to minimise the effect of electrical noise.  Joints in the loop or feeder are not recommended. Where this is not possible, joints are to be soldered and  terminated  in  a  waterproof  junction  box.  This  is  extremely  important  for  reliable  detector performance. Other forms of joins such as those available in kits, where the joint is properly sealed against moisture, are also permitted.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 16 of 29   5.4  Sensing Loop Geometry  NOTE:  1) The circumference of the loop must not exceed 30 m.    2) The area of the loop must not exceed 30 m² and must not be less than 1 m².    3) The loop must be constructed as detailed below.  Sensing loops should, unless site conditions prohibit, be rectangular in shape and should normally be installed with the longest sides at right angle to the direction of traffic movement. These sides should ideally be 1 metre apart.  The length of the loop will be determined by the width of the roadway to be monitored. The loop should reach to within 300mm of each edge of the roadway.  In general,  loops having  a  circumference measurement  in  excess  of  10 metres  should be  installed using two turns of wire, while loops of less than 10 metres in circumference, should have three turns or more. Loops having a circumference measurement less than 6 metres should have four turns. It is good  practice  at  time  of  installation  to  construct  adjacent  loops  with  alternate  three  and  four  turn windings.  For additional Information on loop geometry refer to the following documents: •  “INDUCTIVE LOOP VEHICLE DETECTION” - Nortech Doc. No. MKT01. •  “TRAFFIC DETECTION CONCEPTS” - Nortech Doc. No. MKT02. •  “PARKING APPLICATION MANUAL” – Nortech Doc. No. MKT03  5.5  Loop Installation  All permanent  loop  installations  should  be  installed  in  the  roadway  by  cutting  slots  with  a  masonry cutting disc or similar device. A 45° crosscut shou ld be made across the loop corners to reduce the chance of damage that can be caused to the loop at right angle corners.  NOMINAL SLOT WIDTH: 4 mm NOMINAL SLOT DEPTH : 30 mm TO 50 mm  A slot must also be cut from the loop circumference at one corner of the loop, leading to the roadway edge to accommodate the feeder.  A continuous loop and feeder is obtained by leaving a tail long enough to reach the detector before inserting the cable into the loop slot. Once the required number of turns of wire are wound into the slot around the loop circumference,  the  wire  is  routed again  via the feeder slot to  the roadway edge.  A similar length is allowed to reach the detector and these two free ends are twisted together to ensure they remain in close proximity to one another. (Minimum 20 turns per metre) Maximum recommended feeder length is 100 metres. It should be noted that the loop sensitivity decreases as the feeder length increases, so ideally the feeder cable should be kept as short as possible.  The loops are sealed using a “quick-set” black epoxy compound or hot bitumen mastic to blend with the roadway surface.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 17 of 29   Figure 5.1 Adjacent loops connected to different detector modules   Figure 5.2 Slot Details 45° CROSSCUT TO PROVIDE STRESS RELIEFTRAFFIC DIRECTIONMIN DISTANCE APART -MAX DISTANCE APART - 2 m  (Road Width  = 2 m)3 m (Road Width = 4 m)No Limit--SAW CUTS+/- 2 m Depending on Road WidthCURB/ROAD     EDGE300mm 300mm1 m1 m
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 18 of 29    6.  CONFIGURATION  WARNING: 8.  The connector PIN assignments vary from model to model. Refer to the label on the side of the unit for connector PIN assignment.   NOTE 1:  The tables below show the PIN assignments for Nortech’s standard PD130 Enhanced models. On other models the pin assignments may change.  WARNING: 9.  The  wiring  harness  is  only  rated  for  SELV voltages (less than 60Vdc or less than 42Vac).   If the relays are to switch higher voltages use  CE LVD approved 11 pin sockets  NOTE 2:  All relay contact descriptions refer to the tuned and undetected state.  6.1  PD131 Enhanced Detector - Order number 301FT0119  11-pin connector wiring for PD131 DETECTOR - Order number 301FT0119 301FT0045 Wiring  Harness Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral  Power supply 120V 10% 50/60 Hz Grey  3  Pulse Relay        N/O Green  4  Earth Brown  5  Presence Relay  N/O Yellow  6  Presence Relay  Common Blue  7  Loop White  8  Loop  Twist this Pair Violet  9  Pulse Relay Common Pink  10  Presence Relay   N/C Orange  11  Pulse Relay         N/C    WARNING: 10.  The  wiring  harness  wire  colour  to  PIN  No. assignment  only  applies  to  wiring  harness  Part No. 301FT0045. Other wiring harnesses will have different wire colour to PIN No. assignments.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 19 of 29   6.2  PD132 Enhanced Detector - Order number 301FT0101  11-pin connector wiring for PD132 DETECTOR - Order number 301FT0101 301FT0041 Wiring  Harness Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral Power supply 230V 10% 50/60 Hz Grey  3  Pulse Relay        N/O Violet  4  Pulse Relay        Common Yellow  5  Presence Relay  N/O Brown  6  Presence Relay  Common Blue  7  Loop Blue  8  Loop  Twist this Pair Green/Yellow  9  Earth Pink  10  Presence Relay   N/C White  11  Pulse Relay         N/C  WARNING: 11.   The  wiring  harness  wire  colour  to  PIN  No. assignment  only  applies  to  wiring  harness  Part No. 301FT0041. Other wiring harnesses will have different wire colour to PIN No. assignments.    6.3  PD134 Enhanced Detector - Order number 301FT0122  11-pin connector wiring for PD134 DETECTOR - Order number 301FT0122 301FT0041  Wiring Harness  Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral  Power supply 12V  –10%  to  24V  +10% AC/DC Grey  3  Pulse Relay        N/O Violet  4  Pulse Relay        Common Yellow  5  Presence Relay  N/O Brown  6  Presence Relay  Common Blue  7  Loop Blue  8  Loop  Twist this Pair Green/Yellow  9  Earth Pink  10  Presence Relay   N/C White  11  Pulse Relay         N/C   WARNING: 12.  The  wiring  harness  wire  colour  to  PIN  No. assignment  only  applies  to  wiring  harness  Part No. 301FT0041. Other wiring harnesses will have different wire colour to PIN No. assignments.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 20 of 29   7.  APPLICATIONS  The PD130 Enhanced single channel detectors can be used in a variety of applications in the parking and door / gate environments:  •  To arm card readers and ticket dispensers.  •  As a barrier/gate/door closing detector.  •  As a barrier/gate/door opening detector (Free exit).  •  To generate pulses for counting vehicles.  Some of the features that make the PD130 Enhanced Detector ideal for these purposes have been described in the preceding paragraphs.  For  more  details  on  parking  applications,  refer  to  “Parking  Applications  Manual”,  Document  No. MKT0003.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 21 of 29   8.  CUSTOMER FAULT ANALYSIS  8.1  Fault Finding    FAULT  CAUSED BY  REMEDY  Red LED does not glow on power up.  If the indicator is off then there is a fault on the power connection to the unit.   Check power feed to the unit.  After the initial tune period the Green LED flashes (ON for 1 second and OFF for ½ second).    Unit cannot tune to the loop due to faulty loop or feeder connection.  Loop may be too small or too large.  Faulty detector unit.   Check loop installation and connections.   Recut as per installation instructions.  Replace unit.  After tuning, the loop output LED flashes intermittently and the relay chatters.    The loop is getting spurious detects due to:  a) Crosstalk with adjacent     detector.  b) Faulty loop or feeder      connection.      a) Change frequency        setting.  b) Check that the feeders are      correctly connected and      adequately twisted.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 22 of 29   8.2  DU100 – Detector  Diagnostic Unit  The DU100 Diagnostic unit is a hand-held test instrument that has been designed to operate with the PD130 Enhanced detector to provide installation  / service personnel with positive verification of the correct installation and operation of the vehicle detector.  The following parameters may be verified using this instrument:  1.  Detector type and version    2.    Loop status   Display of loop frequency and magnitude of current change of loop  inductance  %∆L/L.    3.   Frequency    Readout of the actual loop operating frequency and the magnitude of           the frequency drift since the last re-tune.    4.   Sensitivity   Displays the Minimum and Maximum changes of Inductance %∆L/L  that caused a detect since the last re-tune.    5.   Status    Displays the current status of the detector i.e. Undetect, Detect, Open           circuit, Short circuit or Indeterminate.    6.   Time    The time in days and hours since the last re-tune and the reason for           the last re-tune i.e. Reset: manual or power failure, Loop short circuit,           Loop open circuit,  Indeterminate or an Inductance change of greater           than 15 %∆L/L (typical)  This  historical  information  is  invaluable  for  providing  information about intermittent faults.    7.   Crosstalk    Allows for the comparison of the operating frequencies of detector           loops in close proximity to each other. If the operating frequencies are           too close the DU100 test will indicate a failure.  For further information refer to the Diagnostic Unit DU100 User Manual Document No. 895UM0001.  It is highly recommended that after installation of a detector (or if the loop has been changed in any way) that the DU100 Diagnostics Unit is used to verify the correct operation of the detector. A record of the readings should be kept so that if there is a problem in the future a comparison can be made to identify what has changed. The form in Appendix A could be used to record these readings.  8.3  Interpretation of DU100 Readings    8.3.1  Frequency  For  the  PD130  Enhanced  Detector  the  Minimum  frequency  is  12  kHz  and  the  Maximum frequency is 85 kHz.  If  a  20  µH  loop  is  connected  directly  (no  feeder  cable)  to  the  Detector  and  the  Frequency switches are set to “High Frequency” the typical frequency would be 84 kHz.  If  a  1500  µH  loop  is  connected  directly  (no  feeder  cable)  to  the  Detector  and  the  Frequency switches are set to “Low Frequency” the typical frequency would be 13 kHz.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 23 of 29     If the Frequency reading from the DU100 is close to the Maximum Frequency the inductance of the LOOP is too small – you need to add turns to the loop.  If the Frequency reading from the DU100 is close to the Minimum Frequency the inductance of the LOOP is too high and you need to remove turns from the loop.  If the detector is operating close to either limit it is possible that either the frequency drift caused by environmental changes or the shift in frequency caused by a large ∆L/L detect will cause the frequency to go outside the limits and cause a retune.   8.3.2   Frequency drift  The PD130 Enhanced Detector can handle environmental conditions that cause the frequency to drift up to at a rate of approximating 1 %∆L/L per minute.  If  the  Drift  reading  approaches  this  value  the  detector  will  have  problems  tracking  the environmental change.  If the drift is higher than say 0.5 %∆L/L per minute this will indicate a possible fault with the loop or feeder cable. Possibly the wire insulation has deteriorated and moisture is causing a short to earth or that wires of the loop are no longer encapsulated and are moving.  For  more  information  about  Frequency  drift  refer  to  the  “Theory  of  Application”  section  in Diagnostic Unit DU100 User Manual Document No. 895UM0001.  8.3.3   Sensitivity  For a standard loop of 1.0 metres by 2.0 metres with 2 turns (circumference less than 10 m) and a ten meter feeder cable the following table shows typical sensitivity values for different vehicle types:  VEHICLE TYPE  %∆∆∆∆L/L Metal Supermarket Trolley   Bicycle  0.04 Motorbike  0.12 Articulated Truck  0.38 Four Wheel Drive  0.40 5 Ton Tip Truck  0.45 Motor Car  > 1.00 Forklift  > 1.00  For more information about Sensitivity refer to the “Theory of Application” section in Diagnostic Unit DU100 User Manual Document No. 895UM0001.  8.3.4   Time  This is a powerful tool in identifying problems with an installation. The time since the last retune of the detector  will let  you know  when  the  event occurred  and the reason  will inform  you of  what caused the event.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 24 of 29    8.3.5   Crosstalk  For information about resolving crosstalk refer to the “Theory of Application” section in Diagnostic Unit DU100 User Manual Document No. 895UM0001.   8.4  Functional Test  To test a detector, connect it to an inductive loop with a total inductance in order of 300 microhenries. (This  may  be  achieved  in  the  workshop  by  winding  (x)  turns  of  wire  on  a  non-metallic  former  of diameter (y)).  X = 19 turns 0,25mm wire  Y = 238mm (9.4 inches)  Bring a small metal object approximately the size of a matchbox close to the loop coil. The following will happen on detection:  The OUTPUT LED will light up.  The PRESENCE output relay will operate.  The PULSE relay will operate momentarily (approximately 150ms duration).  To  check  the  sensitivity,  presence  time  etc.,  use  should  be  made  a  calibrated  tester,  which compromises of a calibrated loop similar to the one described above with a moveable vane, which can be moved over the loop at pre-determined heights.  This device together with the DU100 hand-held test instrument will allow comprehensive analysis of the operating characteristics of the detector.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 25 of 29    APPENDIX A - FCC ADVISORY STATEMENT   NOTE: This equipment has been tested and found to comply with the limits of PART 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.   Operation is subject to the following two conditions:   1  This device may not cause harmful interference, and  2  This device must accept any interference received, including interference that may cause undesired operation  This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.   However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:   Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver.  Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  Consult the dealer or an experienced radio/TV technician for help.  The following booklets prepared by the Federal Communications Commission (FCC) may also prove helpful:  • How to Identify and Resolve Radio-TV Interference Problems (Stock No. 004-000-000345-4) • Interface Handbook (Stock No. 004-000-004505-7)  These booklets may be purchased from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.   WARNING: 13.  Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 26 of 29   APPENDIX B – INSTALLATION OUTDOORS   Appendix B.1  IEC 60950-22:2005 – Outdoor cabinet  If the PD130 Enhanced Detector is to be installed outdoors it must be installed in a cabinet  /  housing  that  complies  with  the  requirements  of  IEC  60950-22:2005  for  a minimum of pollution degree 2.  Appendix B.2  IEC 60950-22:2005 - Northern Europe  To achieve outdoor operation down to -50 °C as requ ired by IEC 60950-22:2005 for Northern Europe (Finland, Norway and Sweden) a heater with a thermostat must be included in the cabinet that houses the PD130 Enhanced Detector.    Appendix B.3  IEC 60950-1:2005 – Overvoltage Category  If  the  unit  is  likely to  be exposed  to  transient overvoltage  greater  that IEC  60950-1 Overvoltage Category II additional protection must be provided external to the unit on the supply lines.
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 27 of 29   APPENDIX C –REQUEST FOR TECHNICAL SUPPORT FORM  For Technical support please fill in the form below and send it to your supplier. Its is recommended that at installation you complete this form as a record of the Installation. If there is a problem later on you can identify what has changed.  For locating faults in “Inductive Loop Vehicle Detector” installations it is highly recommended that you use the DU100 DIAGNOSTICS UNIT. Please refer to the DU100 user manual Doc. No. 895UM0001 for details of how to operate the DU100.   Contact Details:-  Your Name: __________________________________  Your company: ____________________________  Telephone No. _______________________   Mobile/Cellphone No. _________________  FAX No. ____________________________  E-mail: ____________________________  Postal address: ____________________________________                            _____________________________________        _____________________________________   Product Model (i.e. PD134) _____________               Product FT No.   301FT_____________  Product Serial Number: ___________________________   Site Name: __________________________________ Detector No. (at the site): ______________  What are the settings of the switches on the front of the unit    ON or OFF      Switch  1   ___________  (FREQ  Frequency)      Switch  2   ___________  (FREQ  Frequency)      Switch  3   ___________  (SENS  Sensitivity)      Switch  4   ___________  (SENS  Sensitivity)      Switch  5   ___________  (ASB    Automatic Sensitivity Boost)      Switch  6   ___________  (FILT    Filter)      Switch  7   ___________  (PULSE  Pulse on detect or un-detect)      Switch  8   ___________  (PRES  Presence Limited or Permanent)  What application is this unit used in (short description)_______________________________________    __________________________________________________________________________________  __________________________________________________________________________________
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 28 of 29     POWER SUPPLY DETAILS:   Nominal Voltage: _______ V     Minimum Voltage: _______ V    Maximum Voltage: ________ V  AC or DC ?    ______________   If AC then the Frequency _______  Hz   LOOP DETAILS  Size of loop:    ___ m by ___ m               Shape of loop: _________________________________  Number of Turns: _____  Size of wire used (mm2 or AWG) _____________  Type of wire insulation and thickness of insulation:_____________  How far below the surface is the loop: __________ mm  Are there any metal objects below the loop such as concrete reinforcing, water pipes etc if yes please give details:  _____________________________________________________________________________   ____________________________________________________________________________  _____________________________________________________________________________  Are there any power cables below the loop if yes please give details:  _____________________________________________________________________________   _____________________________________________________________________________   _____________________________________________________________________________   Are there  any other  loops  in  the  area if  so  how many?     ________   and how  close to this loop  are  they? ________ m  FEEDER CABLE DETAILS  Length of feeder cable ______________m  Size of wire used (cross sectional area of copper mm2 or AWG) _____________  (should  be  1.5 mm2     or larger)  Type of wire insulation and thickness of insulation:_____________ (should be  __________ )  Type of feeder cable used (screened, armoured, multicore, etc.)  ____________________________________________________________________________________  ____________________________________________________________________________________  In the feeder cable how many twists per meter are there?____________ (should be more than 20 per metre)
 301UM0030_01  PD130 Enhanced Vehicle Detector User Manual  Page: 29 of 29   Are there any other cables close to this feeder cable? If so please give details:   _____________________________________________________________________________   _____________________________________________________________________________   _____________________________________________________________________________   FEEDER CABLE AND LOOP DETAILS  DC resistance of Feeder plus Loop: __________  ohms  Inductance of Feeder plus Loop: __________ Micro Henries  Loop  and  feeder  resistance  to  earth (with detector  unplugged)  using  a  500V Megger:  ___________  Ohms (should be greater than 10 Mega Ohms)   READINGS FROM DU100 DIAGNOSTICS UNIT   Frequency: ______________ kHz    Loop Frequency Drift: __________ % If you do not have a DU100 when the detector tunes how many times does the green LED flash____________  Inductance Change for each type of vehicle that is encountered on this site. (Use the maximum sensitivity reading from the DU100 and reset the detector between each reading):  Bicycle:  __________  %∆L/L  Motorbike:  __________  %∆L/L  Car:  __________  %∆L/L  Articulated truck:  __________  %∆L/L  Four wheel drive:  __________  %∆L/L  5 Ton Tip Truck:  __________  %∆L/L  Forklift:  __________  %∆L/L  Other specify: type _________________________  Change  __________  %∆L/L  Sensitivity     Min: _________ %∆L/L              Max: ___________  %∆L/L  Status (Undetect, Detect, Open circuit, Short circuit or Indeterminate ):________________________________  Time since last retune: ___________ days    _____________ hours   Reason for Retune (Reset: manual or power failure, Short circuit, Open circuit, Indeterminate, Inductance change of greater than 15 %∆L/L (typical): _______________________________________________  Crosstalk (Pass / Fail): _______________ If fail actual frequencies of the two problem detector loops  Frequency 1:___________kHz    Frequency 2:______________kHz
 Nortech International (Pty) Ltd PO Box 4099  32A Wiganthorpe Road Willowton Hub  Pietermaritzburg Pietermaritzburg  3201 South Africa 3200 South Africa   Reg. No: 98/1095  Tel: (033) 345 3456  Int. Tel: +27 33 345 3456 Fax: (033) 394 6449  Int. Fax: +27 33 394 6449 Email: mkt@nortech.co.za  URL: www.nortech.co.za                                        TD136 Enhanced  Vehicle Detector User Manual     Nortech International (Pty) Ltd All rights reserved Copyright © 2009 Document Number: 301UM0031_01 Date of Issue: September 2009 This document is for information only and unless otherwise indicated, is not to form part of any contract.  In accordance with the manufacturer’s policy of continually updating and improving design, specifications contained herein are subject to alteration without notice.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 2 of 29   Table of Contents  1. INTRODUCTION........................................................................................................................................5 2. TECHNICAL DATA ...................................................................................................................................6 2.1 Functional Data ......................................................................................................................................6 2.2 Electrical Data ........................................................................................................................................7 2.3 Environmental Data................................................................................................................................7 2.4 Mechanical Data.....................................................................................................................................8 2.5 Approvals................................................................................................................................................8 3. OPERATING INSTRUCTIONS..................................................................................................................9 3.1 Hardware Set-up ....................................................................................................................................9 3.2 Switch Setting Selections .......................................................................................................................9 3.2.1 Frequency Switch............................................................................................................................9 3.2.2 Sensitivity ......................................................................................................................................10 3.2.3 Presence Time ..............................................................................................................................10 3.2.4 Delay Time ....................................................................................................................................11 3.2.5 Reset Switch .................................................................................................................................11 3.3 Front Panel Indicator ............................................................................................................................11 4. PRINCIPAL OF OPERATION .................................................................................................................12 4.1 Detector Tuning....................................................................................................................................12 4.2 Detector Sensitivity...............................................................................................................................13 4.3 Modes of Operation..............................................................................................................................13 4.4 Response Times...................................................................................................................................13 5. INSTALLATION GUIDE ..........................................................................................................................14 5.1 Product Safety Requirements...............................................................................................................14 5.2 Operational Constraints........................................................................................................................14 5.2.1 Environmental Factors to Consider...............................................................................................14 5.2.2 Crosstalk .......................................................................................................................................15 5.2.3 Reinforcing ....................................................................................................................................15 5.3 Loop and Feeder Specification.............................................................................................................15 5.4 Sensing Loop Geometry.......................................................................................................................16 5.5 Loop Installation ...................................................................................................................................16 6 CONFIGURATION ......................................................................................................................................18 6.1 TD136 Enhanced – 120 VAC Vehicle Detector - Order number 305FT0004........................................18 6.2 TD136 Enhanced – 230 VAC Vehicle Detector - Order number 305FT0001........................................19 6.3 TD136 Enhanced – 12 to 24 VAC/DC Vehicle Detector - Order number 305FT0010.............................19 7. APPLICATIONS ......................................................................................................................................20 8. CUSTOMER FAULT ANALYSIS ............................................................................................................21 8.1 Fault Finding.........................................................................................................................................21 8.2 DU100 – DETECTOR DIAGNOSTIC UNIT..........................................................................................22 8.2.1 Interpretation of DU100 readings..................................................................................................22 8.2.1.1 Frequency ....................................................................................................................................................22 8.2.1.2   Frequency drift ...........................................................................................................................................23 8.2.1.3   Sensitivity...................................................................................................................................................23 8.2.1.4   Time ...........................................................................................................................................................23 8.2.1.5   Crosstalk ....................................................................................................................................................24 8.3 Functional Test.....................................................................................................................................24 APPENDIX A - FCC ADVISORY STATEMENT ................................................................................................25 APPENDIX B – INSTALLATION OUTDOORS..................................................................................................26
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 3 of 29    Appendix B.1 IEC 60950-22:2005 – Outdoor cabinet..................................................................................26 Appendix B.2 IEC 60950-22:2005 - Northern Europe .................................................................................26 Appendix B.3 IEC 60950-1:2005 – Overvoltage Category ..........................................................................26 APPENDIX C –REQUEST FOR TECHNICAL SUPPORT FORM.....................................................................27
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 4 of 29    WARNING: 1.  This unit must be earthed!  WARNING: 2.  Disconnect power before working on this unit!  WARNING: 3.  Installation and operation by service personnel only!  WARNING: 4.  No user serviceable parts inside. Only service personnel may open the unit to change internal settings. Warranty void if cover removed !  WARNING: 5.  Always  suspend  traffic  through  the  barrier  area  during installation  and  testing  that  may  result  in  unexpected operation of the barrier.  WARNING: 6.  USA FCC  Advisory  Statement  –  Refer  to  Appendix  A  at  the end of this document.  WARNING: 7.  Europe Disposing of the product:  This electronic product is subject to the  EU  Directive  2002/96/EC  for Waste  Electrical  and  Electronic Equipment  (WEEE).  As  such,  this product must not be disposed of at a  local  municipal  waste  collection point.  Please  refer  to  local regulations for directions on how to dispose  of  this  product  in  an environmental friendly manner.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 5 of 29   1.  INTRODUCTION  The  TD136  Enhanced  Vehicle  Detector  is  a  single  channel  microprocessor  based  detector  designed specifically for traffic control applications. The TD136 Enhanced Vehicle Detector has been designed using the most up-to-date technology in order to meet the requirements of a vast number of traffic applications in terms of operating conditions and functional options available to the user.   The primary function of the detector is to detect vehicle presence by means of an inductance change caused by the vehicle passing over a wire loop buried under the road surface. The detector has been designed for ease of installation and convenience.       The detector has been designed for ease of installation and convenience. The various modes are selected by changing the positions of the switch on the front of the unit.  The switches allow for different loop frequency settings, sensitivity settings and mode settings.  The TD136 Enhanced Vehicle Detector provides visual output (LED) on the front of the enclosure and relay change-over contacts are taken on the 11 pin connector at the rear of the enclosure. The LED indicates the power has been applied to the unit, that a vehicle is present over the loop and if there is a fault on the loop.   The Presence relay is fail-safe and will close on a vehicle detect or in the event of power failure. The TD136 Enhanced  Vehicle Detector  is  also  provided  with  an  integral  fault relay, which  will provide  an  output  in the event of a loop fault condition.  Related Documents:  TD136 Enhanced Vehicle Detector Data Sheet Document No. 305DS0002  Installation Leaflet Document No. 300LF0006   Diagnostic Unit DU100 User Manual Document No. 895UM0001
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 6 of 29  2.  TECHNICAL DATA  2.1  Functional Data   Tuning          Fully Automatic    Self-tuning range      20 to 1500 µH    Sensitivity        Four step switch selectable             High 0.02 %∆L/L             Medium High 0.05 %∆L/L             Medium Low 0.10 %∆L/L             Low 0.50 %∆L/L    Frequency        Four step switch selectable             Frequency dependent on loop size  Relay Outputs                   Presence Relay       Fault Relay    Presence Relay       Fail-safe  Presence Time        Switch selectable:           1 Second             4 Minutes             40 Minutes             No fixed time-out (dependant on inductance change) Approx.              1 hour for 3 %∆L/L    Delay Time        Switch selectable:             0 Seconds             10 Seconds             20 Seconds             30 Seconds    Fault Output        Separate fault monitor output relay             Operates under the following conditions: 1.  Loop open/short circuit 2.  Detector/power fault    Response Times      Turn – on 60 milliseconds             Turn – off 60 milliseconds    Drift Compensation Rate    Approx. 1 %∆L/L per minute    Visual Indications      1 X  Power LED - Red             1 x Channel Status LED - Green    Reset          Reset by push button on front of enclosure    Surge protection      Loop isolation transformer, gas discharge tubes, and Zener  Diode clamping on loop input
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 7 of 29  2.2  Electrical Data   Power requirements      12 V -10% to 24 V +10% DC/AC 48 to 62 Hz            120 VAC  ±10% (48 to 62 Hz)            230 VAC  ±10 % (48 to 62 Hz)            Requirement: 1.5 VA Maximum @  230 V  Relay Contact Rating                               Relays rated – 5 A @ 230 VAC                                                                                                     Optional – Opto Isolated 50mA @ 30VDC For ambient temperatures above 60°C De-rate the rel ay             Maximum current as per graph below               2.3  Environmental Data    Storage Temperature      -40°C to +80°C    Operating Temperature     -40°C to +70°C    Humidity        Up to 95% relative humidity without condensation    Circuit protection      Conformal coating over the PCB and all components    IP Rating        IP30
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 8 of 29  2.4  Mechanical Data   Housing Material      ABS blend   Mounting Position      Shelf or DIN rail mounting   Connections        11-pin Submagnal (JEDEC No. B11-88)   Size of Housing       78mm (H) X 41mm (W) X 78mm (D)  80 mm75.9 mm77.7 mm40.6 mm   2.5  Approvals  CE Regulations:   EN 301 489-3    Equipment Type: III Class of Equipment: 2         EN 50293    Performance Criteria B  Safety                            IEC / EN 60950-1
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 9 of 29          3.  OPERATING INSTRUCTIONS  3.1  Hardware Set-up  The TD136 Enhanced Vehicle Detector is a single channel traffic detector designed to be shelf or DIN rail mounted with the controls and visual indicators at the front and wiring at the rear of the enclosure.  The power, loop and relay outputs are all connected to the single 11-pin plug, which is mounted at the rear of the enclosure.  3.2  Switch Setting Selections   3.2.1  Frequency Switch  The  frequency  switches  are  the  lower  two  switches,  numbered  1  and  2.  There  are  four  frequency selections and are set out as follows:  SW2 SW1  Off Off High On Off Medium-High Off On Medium-Low On On Low  The frequency switches allows the loop to be shifted higher or lower depending on the switch position. The  frequency  of  the  loop  is  determined  by  the  loop  size,  and  the  frequency  of  the  switch  simply causes a frequency shift on the loop.  Where more than one detector is used the detectors must be set-up to ensure that there is no cross-talk (interference) between the detectors. This can be achieved by ensuring that the loops of the two detectors  are  spaced  sufficiently  apart  (approximately  2  metres  between  adjacent  edges)  and  also ensuring that the detectors are set to different frequencies. As a general rule, the detector connected to the inductive loop with the greatest inductance should be set to operate at the lowest frequency. Loop inductance increases as loop size, number of turns in the loop and feeder length increases.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 10 of 29   3.2.2  Sensitivity  The  sensitivity  of  the  detector  allows  the  detector  to  be  selective  as  to  the  change  of  inductance necessary to produce a detect. There are four sensitivity selections and are set as follows: -  SW4 SW3  Off Off High On Off Medium-High Off On Medium-Low On On Low  3.2.3  Presence Time  The presence time is a mode, which allows the detector to have a presence time of no longer than the time set. The mode is selected by switches No.5 and 6 on the front of the enclosure and is as follows: -  SW6 SW5  Off Off ∞ no fixed time On Off 40 min Off On 4 min On On 1 sec  The presence time as shown above may be altered according to the requirements.  The  1  second  setting  will  give  a  pulse  on  detection  of  a  vehicle  with  a  duration  of  1  second.  The detector  will immediately re-adjust  to  the  normal operating  point and  will give another  detect  in  the event of a further change in the loop inductance, i.e. the detector may be used as a passage detector in this mode.  The  4  minute and  40  minute  settings  work  in  the  same  way as  the 1  second  setting;  however  the detector will now give outputs of 4 minutes or 40 minutes. If the vehicle which caused the inductance change moves off the loop then the detector will go out of detect and this time will be reset to zero for the  next  detect  cycle.  The  detector  may  undetect  before  the  expired  time  period  if  the  change  in inductance for the vehicle is small.  The “no fixed time-out” setting does not have a fixed time period and the presence time is dependant on the magnitude of the inductance change caused by the vehicle over the loop.  On times longer than 1 second there will be a “paralysis time” of approximately 2 seconds between actuations.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 11 of 29  3.2.4  Delay Time  Delay time is a mode in which the output of the detector is delayed by the time specified. If the vehicle leaves the loop before the time has expired, no output will result. The mode is selected by switches No.7 and 8 on the front of the enclosure and is as follows:  SW8 SW7  Off Off Off On Off 10 secs Off On 20 secs On On 30 secs   3.2.5  Reset Switch  The detector automatically tunes to the inductive loops connected to it when power is applied, whether on initial installation or after any break in the power supply. Should it be necessary to retune the detector, as may be required after the changing of any switch selections or after moving the detector from one installation to another, momentary operation of the RESET switch will initiate to the automatic tuning cycle.   3.3  Front Panel Indicator  While the detector is tuning, the ON (Red) LED will glow .The OUTPUT LED (Green) will extinguish when the system is tuned. The green LED will flash at a rate of 1 Hz during tuning. This is used to indicate the frequency of the loop to the user. Every flash of the LED is equivalent to 10 kHz. It will stop when the operating frequency is reached.  This operation is also performed whenever the reset button is depressed.  The  ON  (Red)  LED  will  glow  permanently  to  indicate  that  the  unit  is  functional.  The  red  LED  also serves as an optical interface to the DU100 Diagnostic Unit.  If faults exist with the loop the green LED will come on and flash off at the rate of 2Hz indicating the fault. If the fault is self-healing the detector will continue to operate but the LED will remain on indicating to the user that a fault has occurred.  The LED will go off for a moment during an undetect indicating this, thereafter returning on. This condition can be restored by removing the power or by depressing the reset button.  The green LED will also glow whenever a vehicle is detected passing over the inductive loop.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 12 of 29   4.  PRINCIPAL OF OPERATION  The inductive loop vehicle detector senses the presence of a vehicle over an area defined by a loop of two or more turns of wire laid under the road or pavement surface. This loop of wire is connected to the detector by a twisted pair of wires called a loop feeder.  A vehicle passing over a sensing loop causes a small reduction in the inductance of the loop, which is sensed by the detector. The sensitivity of the detector is adjustable to accommodate a wide range of vehicle types as well as different loop and feeder combinations.  Upon detection of a vehicle passing over the loop the detector operates its output relays which may be used to indicate controls associated with the installation.    4.1  Detector Tuning  Tuning of the detector is fully automatic. When power is applied to the detector upon installation of the system, or when a reset is initiated, the detector will automatically tune itself to the loop to which it is connected. The detector will tune to any loop to inductance range 20 to 1500 microhenries.  This  wide range  ensures  that  all  loop  sizes  and  feeder  combinations  will  be  accommodated  in  the tuning range of the detector.  Once tuned, any slow environmental change in loop inductance is fed to a compensating circuit within the detector, which keeps the detector correctly tuned.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 13 of 29   4.2  Detector Sensitivity  Sensitivity of the detection system is dependent on factors such as loop size, number of turns in the loop, feeder length and the presence of metal reinforcing beneath the loop.  Sensitivity levels  of  the  TD136  Enhanced  Vehicle Detector  have been  carefully  optimized  for  traffic control applications.  The nature of the application determines the required sensitivity, which may be adjusted by means of the sensitivity, switches on the front of the enclosure.    4.3  Modes of Operation  In the presence mode the detector will give a continuous output during the presence of a vehicle over the inductive loop providing that the preset time has not expired. Upon expiry the detector will undetect and tune out the vehicle over the loop.  The presence output is known as a fail-safe output. This implies that in the event of a power failure the detector will give a detect output. The fault relay is also failsafe and will generate an output whenever a loop is faulty or the unit is unable to tune to the loop.    4.4  Response Times  The response time of the detector is the time taken from when a vehicle moves over the loop to when the detector gives an output.  The  response  times  of  the  TD136  Enhanced  Vehicle  Detectors  have  been  adjusted  to  provide adequate response to vehicles in traffic control applications.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 14 of 29  5.  INSTALLATION GUIDE  Optimum  functioning  of  the  detector  module  is  largely  dependent  on  factors  associated  with  the inductive sensor loop connected to it. These factors include choice of material, loop configuration and correct  installation  practice.  A  successful  inductive  loop  vehicle  detection  system  can  be  achieved bearing the following constraints in mind, and strictly following the installation instructions. The detector must be installed in a convenient weatherproof location as close as possible to the loop.    5.1  Product Safety Requirements  •  WARNING:   The unit must be EARTHED.  •  WARNING:   Disconnect the power before working on the unit.  •  WARNING:   On 120 VAC and 230 VAC models a readily accessible disconnect device     MUST be incorporated into the Mains wiring (As per EN 60950 section 1.7.2)  •  WARNING:   All models the power supply to the unit MUST have short circuit protection  and over current protection installed at the power supply source (As per EN  60950 section 1.7.11) typically this will be a 5 Amp Magnetic Circuit Breaker  for AC models and a fuse for DC models.  •  WARNING:  This product must be installed in an enclosure.  •  WARNING:  No user serviceable parts inside. Warranty void if cover removed. ONLY  SERVICE PERSONNEL  MAY OPEN  THE  UNIT TO  CHANGE  THE INTERNAL SETTINGS.  •  WARNING:   Only use CE approved 11 pin relay bases such as Nortech Part No.  CTR119090 or equivalent.  As an alternative to the 11 pin realy base, Nortech has a 11 pin wiring harness, Nortech Part No. 301FT0041, which can only be used in SELV voltage (less than 60 VDC or less than 42 VAC) applications.   5.2  Operational Constraints  5.2.1  Environmental Factors to Consider  Even though the TD136 Enhanced Vehicle parking detectors are housed, the system integrator MUST ensure that the detector is installed in a housing/fire enclosure to protect it from the environment.  The TD136 Enhanced Vehicle parking detectors are rated to operate over the industrial temperature range but the rate of temperature change MUST not exceed 1°C per minute. This system integrator MUST ensure that the housing used complies with this rate of temperature change requirement.  For installation Outdoors refer to Appendix B.  For additional information on Environmental Factors refer to the section “Environmental Influences to Design Parameters” in the “Loops and Loop Installations” Manual, Nortech Document No. MKT05.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 15 of 29   5.2.2  Crosstalk  When two loop configurations are in close proximity, the magnetic fields of one can overlap and disturb the field  of  the  other.  This  phenomenon, known  as  crosstalk, can  cause  false detects  and  detector lock-up.  Crosstalk between adjacent loops operating from different detector modules can be eliminated by:  1.  Careful choice of operating frequency. The closer together the two loops, the further apart the frequencies of operation must be.  2.  Separation between adjacent loops. Where possible a minimum spacing of 2 metres between loops should be adhered to.  3.  Careful screening of feeder cables if they are routed together with other electric cables. The screen must be earthed at the detector end only.  4.  Running feeder cables in their own slots, separated by at least 300mm  For  additional  information  on  Crosstalk  refer  to  the  section  “Crosstalk  Prevention”  in  the DU100 Diagnostic Unit User Manual Nortech Document No. 895UM0001.   5.2.3  Reinforcing  The existence of reinforced steel below  the road surface has the effect of reducing the inductance, and  therefore  the sensitivity,  of  the  loop  detection  system.  Hence,  where  reinforcing  exists  2  turns should be added to the normal loop, as referred to in section 5.4.  The spacing between the loop and steel reinforcing should be greater than 150 mm, although this is not always practically possible. The slot depth should be kept as shallow as possible, taking care that the feeder remains exposed after the sealing compound has been applied.   5.3  Loop and Feeder Specification  Extensive studies have been undertaken over the years by various agencies around the world in order to ascertain the optimum loop installation materials.  As an insulated conductor is a prerequisite, PVC covered cable has been used for many years as a first choice, but tests have shown, in fact, that this is unsuitable for long term installations. The PVC tends  to  become  porous  with  the  result  that  adjacent  loops  become  electrically  coupled  to  one another, with resultant crosstalk implications. Instability and susceptibility to electrical interference can also result.  The  insulation  must  withstand  wear  and  abrasion  from the shifting streets, moisture, and attack by solvents and oils, as well as withstand the heat of high temperature sealants.  Silicone  insulated cable  has  emerged  as  one of the preferred  insulation  materials.  Other  insulation materials are rubber, thermoplastic, synthetic polymer and cross linked polyethylene.  Stranded loop wire is preferred over solid wire. Because of its mechanical characteristics, a stranded wire is more likely to survive bending and stretching than a solid.  A heavy gauge conductor is definitely desirous in order to maintain the loop Q-factor. The loop and feeder should preferably constitute a single length of insulated multi-stranded copper conductor, with no  joints  and  with  the  copper  having  a  minimum  cross  section  1.5  mm2.  The  feeder  is  twisted  to minimize the effect of electrical noise.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 16 of 29   Joints in the loop or feeder are not recommended. Where this is not possible, joints are to be soldered and terminated in a waterproof junction box. This is extremely important for reliable detector performance. Other forms of joins such as those available in kits, where the joint is properly sealed against moisture, are also permitted.   5.4  Sensing Loop Geometry  NOTE:  1) The circumference of the loop must not exceed 30 m.    2) The area of the loop must not exceed 30 m² and must be not less than 1 m².    3) The loop must be constructed as detailed below.  Sensing loops should, unless site conditions prohibit, be rectangular in shape and should normally be installed with the longest sides at right angle to the direction of traffic movement. These sides should ideally be 1 metre apart.  The length of the loop will be determined by the width of the roadway to be monitored. The loop should reach to within 300mm of each edge of the roadway.  In general, loops having a circumference measurement in excess of 10 metres should be installed using two turns of wire, while loops of less than 10 metres in circumference, should have three turns or more. Loops having a circumference measurement less than 6 metres should have four turns. It is good practice at time of installation to construct adjacent loops with alternate three and four turn windings.  For additional Information on loop geometry refer to the following documents: “INDUCTIVE LOOP VEHICLE DETECTION” – Nortech Doc. No. MKT01. “TRAFFIC DETECTION CONCEPTS” – Nortech Doc. No. MKT02. “TRAFFIC APPLICATION MANUAL” – Nortech Doc. No. MKT04   5.5  Loop Installation  All permanent loop installations should be installed in the roadway by cutting slots with a masonary cutting disc or similar devise. A 45° crosscut shou ld be made across the loop corners to reduce the chance of damage that can be caused to the loop at right angle corners.  NOMINAL SLOT WIDTH: 4 mm NOMINAL SLOT DEPTH : 30 mm TO 50 mm  A slot must also be cut from the loop circumference at one corner of the loop to the roadway edge to accommodate the feeder.  A continuous loop and feeder is obtained by leaving a tail long enough to reach the detector before inserting the cable into the loop slot. Once the required number of turns of wire are wound into the slot around the loop circumference,  the  wire  is  routed again  via the feeder slot to  the roadway edge.  A similar length is allowed to reach the detector and these two free ends are twisted together to ensure they remain in close proximity to one another. (Minimum 20 turns per metre) Maximum recommended feeder length is 100 metres. It should be noted that the loop sensitivity decreases as the feeder length increases, so ideally the feeder cable should be kept as short as possible.  The loops are sealed using a “quick-set” black epoxy compound or hot bitumen mastic to blend with the roadway surface.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 17 of 29          Figure 5.2 Slot Details Figure 5.1 Adjacent loops connected to different detector modules 45° CROSSCUT TO PROVIDE STRESSRELIEFTRAFFICDIRECTIONMIN DISTANCE APART-MAX DISTANCE APART-2 m  (Road Width  = 2 m)3 m (Road Width = 4 m)No LimitSAW CUTS+/- 2 m Depending on RoadWidthCURB/ROAD     EDGE300mm 300mm1m1m
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 18 of 29   6  CONFIGURATION  WARNING: 8.  The connector PIN assignments vary from model to model  Refer to the label on the side of the unit for connector PIN assignment.   NOTE 1:  The tables below show the PIN assignments for Nortech’s standard TD136 Enhanced models on other models the pin assignments may change.  WARNING: 9.  The  wiring  harness  is  only  rated  for  SELV voltages (less than 60Vdc or less than 42Vac).   If the relays are to switch higher voltages use  CE LVD approved 11 pin sockets  NOTE 2:  All relay contact descriptions refer to the tuned and undetected state.   6.1  TD136 Enhanced – 120 VAC Vehicle Detector - Order number 305FT0004  11-pin connector wiring for TD136 Enhanced Vehicle – 120 VAC Detector - Order number   305FT0004 301FT0045 Wiring Harness Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral  Power supply 230V 10% 50/60 Hz Grey  3  Fault Relay        N/O Violet  4  Fault Relay        Common Yellow  5  Presence Relay  N/O Brown  6  Presence Relay  Common Blue  7  Loop Blue  8  Loop  Twist this Pair Green/Yellow  9  Earth Pink  10  Presence Relay   N/C White  11  Fault Relay         N/C   WARNING: 10.  The wiring harness wire colour to PIN No. assignment only applies to wiring harness Part No. 301FT0045. Other wiring harnesses will have different wire colour to PIN No. assignments
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 19 of 29  6.2  TD136 Enhanced – 230 VAC Vehicle Detector - Order number 305FT0001  11-pin connector wiring for TD136 Enhanced Vehicle – 230 VAC Detector - Order number 305FT0001 301FT0041 Wiring Harness Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral Power supply 230V 10% 50/60 Hz Grey  3  Fault Relay        N/O Violet  4  Fault Relay        Common Yellow  5  Presence Relay  N/O Brown  6  Presence Relay  Common Blue  7  Loop Blue  8  Loop  Twist this Pair Green/Yellow  9  Earth Pink  10  Presence Relay   N/C White  11  Fault Relay         N/C  WARNING: 11.  The wiring harness wire colour to PIN No. assignment only applies to wiring harness Part No. 301FT0041. Other wiring harnesses will have different wire colour to PIN No. assignments    6.3  TD136 Enhanced – 12 to 24 VAC/DC Vehicle Detector - Order number 305FT0010  11-pin connector wiring for TD136 Enhanced Vehicle  – 12 to 24 VAC/DC Detector – Order number 305FT0010 301FT0041 Wiring Harness Wire COLOUR 11 PIN Connector Pin No. FUNCTION Red  1  Live Black  2  Neutral  Power supply 12V –10% to 24V +10% AC/DC Grey  3  Fault Relay        N/O Violet  4  Fault Relay        Common Yellow  5  Presence Relay  N/O Brown  6  Presence Relay  Common Blue  7  Loop Blue  8  Loop  Twist this Pair Green/Yellow  9  Earth Pink  10  Presence Relay   N/C White  11  Fault Relay         N/C   WARNING: 12.  The wiring harness wire colour to PIN No. assignment only applies to wiring harness Part No. 301FT0041. Other wiring harnesses will have different wire colour to PIN No. assignments
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 20 of 29   7.  APPLICATIONS  The TD136 Enhanced Vehicle single channel Detector can be used in a variety of applications in the traffic and vehicle control environments.  For VA (Vehicle Actuated) or SVA (Semi Vehicle Actuated) traffic intersection control  Some of the features that make the TD136 Enhanced Vehicle Detector ideal for these purposes have been described in the preceding paragraphs.  For more details on traffic applications, refer to “Traffic Applications Manual”, Document No. MKT0004.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 21 of 29   8.  CUSTOMER FAULT ANALYSIS   8.1  Fault Finding     FAULT  CAUSED BY  REMEDY  Red LED does not glow on power up.  If the indicator is off then there is a fault on the power connection to the unit.   Check power feed to the unit.  After the initial tune period the Green LED flashes (ON for 1 second and OFF for ½ second)    Unit cannot tune to the loop due to faulty loop or feeder connection.  Loop may be too small or too large.  Faulty detector unit.   Check loop installation and connections.   Recut as per installation instructions.  Replace unit.  After tuning, the loop output LED flashes intermittently and the relay chatters.    The loop is getting spurious detects due to:  a) Crosstalk with adjacent     detector.  b) Faulty loop or feeder      connection.      a) Change frequency        setting.  b) Check that the feeders are      correctly connected and      adequately twisted.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 22 of 29   8.2  DU100 – DETECTOR DIAGNOSTIC UNIT  The DU100 Diagnostic unit is a hand-held test instrument that has been designed to operate with the TD136 Enhanced Vehicle Detector to provide installation / service personnel with positive verification of the correct installation and operation of the vehicle detector.  The following parameters may be verified using this instrument:  1.  Detector type and version    2.  Loop status    Display of loop frequency and magnitude of current change of loop  inductance  %∆L/L.  3.  Frequency    Readout of the actual loop operating frequency and the magnitude of         the frequency drift since the last re-tune.  4.   Sensitivity  Displays the Minimum and Maximum changes of Inductance %∆L/L  that caused a detect since the last re-tune.    5.   Status    Displays the current status of the detector i.e. Undetect, Detect, Open          circuit, Short circuit or Indeterminate.    6.   Time    The time in days and hours since the last re-tune and the reason for          the last re-tune i.e. Reset: manual or power failure, Loop short circuit,          Loop open circuit,  Indeterminate or an Inductance change of greater          than 15 % ∆ L/L (typical)  This historical information is invaluable in providing information about intermittent faults.    7.   Crosstalk    Allows for the comparison of the operating frequencies of detector          loops in close proximity to each other. If the operating frequencies are          to close the DU100 test will indicate a failure.  For further information refer to the Diagnostic Unit DU100 User Manual Document No. 895UM0001.  It is highly recommended that after installation of a detector (or if the loop has been changed in any way) that the DU100 Diagnostics Unit is used to verify the correct operation of the detector. A record of the readings should be kept so that if there is a problem in the future a comparison can be made to identify what has changed. The form in Appendix A could be used to record these readings.   8.2.1 Interpretation of DU100 readings    8.2.1.1 Frequency For the TD136 Enhanced Vehicle Detector the Minimum frequency is 12 kHz and the Maximum frequency is 85 kHz  If  a  20  µH  loop  is  connected  directly  (no  feeder  cable)  to  the  Detector  and  the  Frequency switches are set to “High Frequency” the typical frequency would be 84 kHz  If  a  1500  µH  loop  is  connected  directly  (no  feeder  cable)  to  the  Detector  and  the  Frequency switches are set to “Low Frequency” the typical frequency would be 13 kHz  If the Frequency reading from the DU100 is close to the Maximum Frequency the inductance of the LOOP is too small – you need to add turns to the loop
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 23 of 29   If the Frequency reading from the DU100 is close to the Minimum Frequency the inductance of the LOOP is too high and you need to remove turns from the loop  If the detector is operating close to either limit it is possible that either the frequency drift caused by environmental changes or the shift in frequency caused by a large ∆L/L detect will cause the frequency to go outside the limits and cause a retune.   8.2.1.2   Frequency drift The  TD136  Enhanced  Vehicle  Detector  can  handle  environmental  conditions  that  cause  the frequency to drift up to at a rate of approximating 1%∆L/L per minute.  If  the  Drift  reading  approaches  this  value  the  detector  will  have  problems  tracking  the environmental change  If the drift is higher than say 0.5 %∆L/L per minute this will indicate a possible fault with the loop or feeder cable. Possibly the wire insulation has deteriorated and moisture is causing a short to earth or that wires of the loop are no longer encapsulated and are moving.  For  more  information  about  Frequency  drift  refer  to  the  “Theory  of  Application”  section  in Diagnostic Unit DU100 User Manual Document No. 895UM0001   8.2.1.3   Sensitivity For a standard loop of 1.0 metres by 2.0 metres with 2 turns (circumference less than 10 m) and a ten meter feeder cable the following table shows typical sensitivity values for different vehicle types  VEHICLE TYPE  %∆∆∆∆L/L Metal Supermarket Trolley  0.3 to 2 Bicycle  0.04 Motorbike  0.12 Articulated Truck  0.38 Four Wheel Drive  0.40 5 Ton Tip Truck  0.45 Motor Car  > 1.00 Forklift  > 1.00  For more information about Sensitivity refer to the “Theory of Application” section in Diagnostic Unit DU100 User Manual Document No. 895UM0001   8.2.1.4   Time This is a powerful tool in identifying problems with an installation. The time since the last retune of the detector  will let  you know  when  the  event occurred  and the reason  will inform  you of  what caused the event
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 24 of 29  8.2.1.5   Crosstalk For information about resolving crosstalk refer to the “Theory of Application” section in Diagnostic Unit DU100 User Manual Document No. 895UM0001  8.3  Functional Test  To test a detector, connect it to an inductive loop with a total inductance in order of 300 microhenries. (This may be achieved in the workshop by winding (x) turns of wire on non-metal former of diameter (y)).  X = 19 turns 0,25 mm wire  Y = 238 mm ( 9.4 inches )  Bring a small metal object approximately the size of a matchbox close to the loop  coil. The following will happen on detection:  The OUTPUT LED will light up  The PRESENCE output relay will operate  The PULSE relay will operate momentarily (approximately 150ms duration)  To check the sensitivity, presence time etc., a calibrated tester should be used, which compromises, of a calibrated loop similar to the one described above with a moveable vane, which can be moved over the loop at pre-determined heights.  This device together with the DU100 hand-held test instrument will allow comprehensive analysis of the operating characteristics of the detector.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 25 of 29  APPENDIX A - FCC ADVISORY STATEMENT  NOTE: This equipment has been tested and found to comply with the limits of PART 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.   Operation is subject to the following two conditions:   1  This device may not cause harmful interference, and  2  This device must accept any interference received, including interference that may cause undesired operation  This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.   However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:   Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver.  Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  Consult the dealer or an experienced radio/TV technician for help.  The following booklets prepared by the Federal Communications Commission (FCC) may also prove helpful:  • How to Identify and Resolve Radio-TV Interference Problems (Stock No. 004-000-000345-4) • Interface Handbook (Stock No. 004-000-004505-7)  These booklets may be purchased from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.   WARNING: 13.  Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 26 of 29   APPENDIX B – INSTALLATION OUTDOORS   Appendix B.1  IEC 60950-22:2005 – Outdoor cabinet  If the PD136 Enhanced Detector is to be installed outdoors it must be installed in a cabinet  /  housing  that  complies  with  the  requirements  of  IEC  60950-22:2005  for  a minimum of pollution degree 2.  Appendix B.2  IEC 60950-22:2005 - Northern Europe  To achieve outdoor operation down to -50 °C as requ ired by IEC 60950-22:2005 for Northern Europe (Finland, Norway and Sweden) a heater with a thermostat must be included in the cabinet that houses the PD130 Enhanced Detector.    Appendix B.3  IEC 60950-1:2005 – Overvoltage Category  If  the  unit  is  likely to  be exposed  to  transient overvoltage  greater  that IEC  60950-1 Overvoltage Category II additional protection must be provided external to the unit on the supply lines.
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 27 of 29    APPENDIX C – REQUEST FOR TECHNICAL SUPPORT FORM  For Technical support please fill in the form below and send it to your supplier. It is recommended that at installation you complete this form as a record of the Installation. If there is a problem later on you can identify what has changed.  For locating faults in “Nortech Inductive Loop Vehicle Detector” installations it is highly recommended that you use the DU100 DIAGNOSTICS UNIT. Please refer to the DU100 user manual Doc. No. 895UM0001 for details of how to operate the DU100.   Contact Details:-  Your Name: __________________________________________  Your company: ____________________________  Telephone No. _______________________   Mobile/Cellphone No. ________________________  FAX No. ____________________________  E-mail: ______________________________  Postal address: ____________________________________                            _____________________________________        _____________________________________   Product Model (i.e. TD136 Enhanced Vehicle Detector) _____________________________________   Product FT No.   305FT_____________   Product Serial Number: _______________________   Site Name: __________________________________ Detector No. (at the site): ________________  What are the settings of the switches on the front of the unit    ON or OFF      Switch  1   ___________  (FREQ    Frequency)      Switch  2   ___________  (FREQ    Frequency)      Switch  3   ___________  (SENS    Sensitivity)      Switch  4   ___________  (SENS    Sensitivity)      Switch  5   ___________  (PRES    Presence Time)      Switch  6   ___________  (PRES    Presence Time)      Switch  7   ___________  (DELAY    Delay Time)      Switch  8   ___________  (DELAY    Delay Time)   What application is this unit used in (short description)_____________________________________    _________________________________________________________________________________  _________________________________________________________________________________
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 28 of 29   POWER SUPPLY DETAILS:   Nominal Voltage: _______ V     Minimum Voltage: _______ V    Maximum Voltage: ________ V  AC or DC ?    ______________   If AC then the Frequency _______  Hz   LOOP DETAILS  Size of loop:    ___ m by ___ m               Shape of loop: _________________________________  Number of Turns: _____  Size of wire used (mm2 or AWG) _____________  Type of wire insulation and thickness of insulation:_____________  How far below the surface is the loop: __________ mm  Are there any metal objects below the loop such as concrete reinforcing, water pipes etc if yes please give details:  _____________________________________________________________________________   ____________________________________________________________________________  _____________________________________________________________________________  Are there any power cables below the loop if yes please give details:  _____________________________________________________________________________   _____________________________________________________________________________   _____________________________________________________________________________   Are there any other loops in the area if so how many?   ________  and how close to this loop are they? ________ m  FEEDER CABLE DETAILS  Length of feeder cable______________m  Size of wire used (cross sectional area of copper mm2 or AWG) _____________  (should be 1.5 mm2   or larger)  Type of wire insulation and thickness of insulation:_____________ (should be  __________ )   Type of feeder cable used (screened, armoured, multicore, etc.)  ____________________________________________________________________________________  ____________________________________________________________________________________  In the feeder cable how many twists per meter are there?____________ (should be more than 20 per metre)
 301UM0031_01  TD136 Enhanced Vehicle Detector User Manual  Page: 29 of 29  Are there any other cables close to this feeder cable? If so please give details:   _________________________________________________________________________    _______________________________________________________________________  _________________________________________________________________________  FEEDER CABLE AND LOOP DETAILS  DC resistance of Feeder plus Loop: __________  ohms  Inductance of Feeder plus Loop: __________ Micro Henries  Loop and feeder resistance to earth (with detector unplugged) using a 500V Megger: ___________ Ohms (should be greater than 10 Mega Ohms)   READINGS FROM DU100 DIAGNOSTICS UNIT   Frequency: ______________ kHz    Loop Frequency Drift: __________ % If you do not have a DU100 when the detector tunes how many times does the green LED flash____________  Inductance Change for each type of vehicle that is encountered on this site. (Use the maximum sensitivity reading from the DU100 and reset the detector between each reading):  Bicycle:  __________ %∆L/L  Motorbike:  __________ %∆L/L  Car:  __________ %∆L/L  Articulated truck:  __________ %∆L/L  Four wheel drive:  __________ %∆L/L  5 Ton Tip Truck:  __________ %∆L/L  Forklift:  __________ %∆L/L  Other specify: type _________________________ Change __________ %∆L/L  Sensitivity     Min: _________ %∆L/L              Max: ___________ %∆L/L  Status (Undetect, Detect, Open circuit, Short circuit or Indeterminate):________________________________  Time since last retune: ___________ days    _____________ hours   Reason for Retune (Reset: manual or power failure, Short circuit, Open circuit, Indeterminate, Inductance change of greater than 15 %∆L/L (typical):  _________________________________________________________________  Crosstalk (Pass / Fail): _______________ If fail actual frequencies of the two problem detector loops  Frequency 1:___________kHz    Frequency 2:______________kHz

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