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

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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
Fax: (033) 394 6449
Email: mkt@nortech.co.za
Int. Tel: +27 33 345 3456
Int. Fax: +27 33 394 6449
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.
Table of Contents
1.
INTRODUCTION........................................................................................................................................5
2.
TECHNICAL DATA ...................................................................................................................................6
2.1
2.2
2.3
2.4
2.5
3.
Functional Data ......................................................................................................................................6
Electrical Data ........................................................................................................................................7
Environmental Data ................................................................................................................................7
Mechanical Data.....................................................................................................................................7
Approvals................................................................................................................................................8
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
4.2
4.3
4.4
5.
Detector Tuning ....................................................................................................................................12
Detector Sensitivity...............................................................................................................................12
Modes of Operation ..............................................................................................................................13
Response Times...................................................................................................................................13
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
6.2
6.3
PD131 Enhanced Detector - Order number 301FT0119 .....................................................................18
PD132 Enhanced Detector - Order number 301FT0101 .....................................................................19
PD134 Enhanced Detector - Order number 301FT0122 .....................................................................19
7.
APPLICATIONS ......................................................................................................................................20
8.
CUSTOMER FAULT ANALYSIS ............................................................................................................21
8.1
8.2
8.3
Fault Finding .........................................................................................................................................21
DU100 – Detector Diagnostic Unit ......................................................................................................22
Interpretation of DU100 Readings ........................................................................................................22
8.3.1
8.3.2
8.3.3
8.3.4
8.3.5
8.4
Frequency ......................................................................................................................................................22
Frequency drift ..............................................................................................................................................23
Sensitivity ......................................................................................................................................................23
Time ..............................................................................................................................................................23
Crosstalk .......................................................................................................................................................24
Functional Test .....................................................................................................................................24
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APPENDIX A - FCC ADVISORY STATEMENT ................................................................................................25
APPENDIX B – INSTALLATION OUTDOORS..................................................................................................26
Appendix B.1
Appendix B.2
Appendix B.3
IEC 60950-22:2005 – Outdoor cabinet..................................................................................26
IEC 60950-22:2005 - Northern Europe .................................................................................26
IEC 60950-1:2005 – Overvoltage Category ..........................................................................26
APPENDIX C –REQUEST FOR TECHNICAL SUPPORT FORM.....................................................................27
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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.
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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
Installation Leaflet
Diagnostic Unit DU100 User Manual
301UM0030_01
Document No. 301DS0010
Document No. 300LF0006
Document No. 895UM0001
PD130 Enhanced Vehicle Detector User Manual
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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.
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2.2
2.3
2.4
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
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
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)
301UM0030_01
40.6 mm
75.9 mm
77.7 mm
80 mm
PD130 Enhanced Vehicle Detector User Manual
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2.5
Approvals
CE Regulations:
Safety:
301UM0030_01
EN 301 489-3
Equipment Type: III
Class of Equipment: 2
EN 50293
Performance Criteria B
IEC / EN 60950 -1
PD130 Enhanced Vehicle Detector User Manual
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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
Off
On
Off
On
SW1
Off
Off
On
On
High
Medium-High
Medium-Low
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 crosstalk (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.
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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
Off
On
Off
On
SW3
Off
Off
On
On
High
Medium-High
Medium-Low
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
On
Disabled
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 turnon 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
On
Disabled
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
On
Pulse on Detect
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
On
301UM0030_01
Limited Presence
Permanent Presence
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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.
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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.
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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.
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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
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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 mm . 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.
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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.
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300mm
+/- 2 m Depending on Road Width
300mm
1m
SAW CUTS
CURB/ROAD
EDGE
- - 2 m (Road Width = 2 m)
MIN DISTANCE APART
3 m (Road Width = 4 m)
1m
- - No Limit
MAX DISTANCE APART
45° CROSSCUT TO PROVIDE STRESS RELIEF
TRAFFIC DIRECTION
Figure 5.1 Adjacent loops connected to different detector modules
Figure 5.2 Slot Details
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6.
CONFIGURATION
WARNING: 8.
NOTE 1:
The connector PIN assignments vary from model
to model. Refer to the label on the side of the unit
for connector PIN assignment.
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:
6.1
All relay contact descriptions refer to the tuned and undetected state.
PD131 Enhanced Detector - Order number 301FT0119
11-pin connector wiring for PD131 DETECTOR - Order number 301FT0119
301FT0045
11 PIN
FUNCTION
Wiring
Harness Connector
Wire COLOUR
Pin No.
Red
Live
Power supply
120V 10% 50/60 Hz
Black
Neutral
Grey
Pulse Relay
N/O
Green
Earth
Brown
Presence Relay N/O
Yellow
Presence Relay Common
Blue
Loop
Twist this
Pair
White
Loop
Violet
Pulse Relay Common
Pink
10
Presence Relay N/C
Orange
11
Pulse Relay
N/C
WARNING: 10.
301UM0030_01
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.
PD130 Enhanced Vehicle Detector User Manual
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6.2
PD132 Enhanced Detector - Order number 301FT0101
11-pin connector wiring for PD132 DETECTOR - Order number 301FT0101
301FT0041
11 PIN
FUNCTION
Wiring
Harness Connector
Wire COLOUR
Pin No.
Red
Live
Power supply
230V 10% 50/60 Hz
Black
Neutral
Grey
Violet
Yellow
Brown
Blue
Blue
Green/Yellow
Pink
White
WARNING: 11.
6.3
10
11
Pulse Relay
N/O
Pulse Relay
Common
Presence Relay N/O
Presence Relay Common
Loop
Twist this
Pair
Loop
Earth
Presence Relay N/C
Pulse Relay
N/C
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.
PD134 Enhanced Detector - Order number 301FT0122
11-pin connector wiring for PD134 DETECTOR - Order number 301FT0122
301FT0041 Wiring 11 PIN
FUNCTION
Harness
Wire Connector
COLOUR
Pin No.
Red
Live
Power supply
12V –10% to 24V +10%
Black
Neutral
AC/DC
Grey
Pulse Relay
N/O
Violet
Pulse Relay
Common
Yellow
Presence Relay N/O
Brown
Presence Relay Common
Blue
Loop
Twist this
Pair
Blue
Loop
Green/Yellow
Earth
Pink
10
Presence Relay N/C
White
11
Pulse Relay
N/C
WARNING: 12.
301UM0030_01
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.
PD130 Enhanced Vehicle Detector User Manual
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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.
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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.
Check loop installation and
connections.
Loop may be too small or too
large.
Recut as per installation
instructions.
Faulty detector unit.
Replace unit.
After tuning, the loop output
LED flashes intermittently and
the relay chatters.
301UM0030_01
The loop is getting spurious
detects due to:
a) Crosstalk with adjacent
detector.
a) Change frequency
setting.
b) Faulty loop or feeder
connection.
b) Check that the feeders are
correctly connected and
adequately twisted.
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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.
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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
Motorbike
Articulated Truck
Four Wheel Drive
5 Ton Tip Truck
Motor Car
Forklift
0.04
0.12
0.38
0.40
0.45
> 1.00
> 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.
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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.
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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.
301UM0030_01
Changes or modifications not expressly approved
by the party responsible for compliance could void
the user’s authority to operate the equipment.
PD130 Enhanced Vehicle Detector User Manual
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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.
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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)_______________________________________
__________________________________________________________________________________
__________________________________________________________________________________
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POWER SUPPLY DETAILS:
Nominal Voltage: _______ V
AC or DC ?
Minimum Voltage: _______ V
Maximum Voltage: ________ V
______________ If AC then the Frequency _______ Hz
LOOP DETAILS
Size of loop:
___ m by ___ m
Shape of loop: _________________________________
Number of Turns: _____
Size of wire used (mm 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?
________ m
________ and how close to this loop are they?
FEEDER CABLE DETAILS
Length of feeder cable ______________m
Size of wire used (cross sectional area of copper mm or AWG) _____________ (should be 1.5 mm
larger)
or
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)
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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
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Frequency 2:______________kHz
PD130 Enhanced Vehicle Detector User Manual
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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
Fax: (033) 394 6449
Email: mkt@nortech.co.za
Int. Tel: +27 33 345 3456
Int. Fax: +27 33 394 6449
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.
Table of Contents
1.
INTRODUCTION........................................................................................................................................5
2.
TECHNICAL DATA ...................................................................................................................................6
2.1
2.2
2.3
2.4
2.5
3.
Functional Data ......................................................................................................................................6
Electrical Data ........................................................................................................................................7
Environmental Data ................................................................................................................................7
Mechanical Data.....................................................................................................................................8
Approvals................................................................................................................................................8
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
4.2
4.3
4.4
5.
Detector Tuning ....................................................................................................................................12
Detector Sensitivity...............................................................................................................................13
Modes of Operation ..............................................................................................................................13
Response Times...................................................................................................................................13
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
CONFIGURATION ......................................................................................................................................18
6.1
6.2
6.3
TD136 Enhanced – 120 VAC Vehicle Detector - Order number 305FT0004 ........................................18
TD136 Enhanced – 230 VAC Vehicle Detector - Order number 305FT0001 ........................................19
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
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Appendix B.1
Appendix B.2
Appendix B.3
IEC 60950-22:2005 – Outdoor cabinet..................................................................................26
IEC 60950-22:2005 - Northern Europe .................................................................................26
IEC 60950-1:2005 – Overvoltage Category ..........................................................................26
APPENDIX C –REQUEST FOR TECHNICAL SUPPORT FORM.....................................................................27
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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.
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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
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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
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2.2
2.3
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
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
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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)
2.5
40.6 mm
75.9 mm
77.7 mm
80 mm
Approvals
CE Regulations:
Safety
301UM0031_01
EN 301 489-3
Equipment Type: III Class of Equipment: 2
EN 50293
Performance Criteria B
IEC / EN 60950-1
TD136 Enhanced Vehicle Detector User Manual
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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
Off
On
Off
On
SW1
Off
Off
On
On
High
Medium-High
Medium-Low
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 crosstalk (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.
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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
Off
On
Off
On
SW3
Off
Off
On
On
High
Medium-High
Medium-Low
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
Off
On
Off
On
SW5
Off
Off
On
On
∞ no fixed time
40 min
4 min
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.
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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
Off
On
Off
On
SW7
Off
Off
On
On
Off
10 secs
20 secs
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.
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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.
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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.
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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.
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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.
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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.
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300mm
+/- 2 m Depending on Road
Width
300mm
SAW CUTS
MIN DISTANCE APART
MAX DISTANCE APART
CURB/ROAD
EDGE
2 m (Road Width = 2 m)
3 m (Road Width = 4 m)
No Limit
45° CROSSCUT TO PROVIDE STRESS
RELIEF
TRAFFIC
DIRECTION
Figure 5.1 Adjacent loops connected to different detector modules
Figure 5.2 Slot Details
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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:
6.1
All relay contact descriptions refer to the tuned and undetected state.
TD136 Enhanced – 120 VAC Vehicle Detector - Order number
305FT0004
11-pin connector wiring for TD136 Enhanced Vehicle – 120 VAC Detector - Order number
305FT0004
301FT0045
11 PIN
FUNCTION
Wiring Harness
Connector
Wire COLOUR
Pin No.
Red
Live
Power supply
230V 10% 50/60 Hz
Black
Neutral
Grey
Fault Relay
N/O
Violet
Fault Relay
Common
Yellow
Presence Relay N/O
Brown
Presence Relay Common
Blue
Loop
Twist this
Pair
Blue
Loop
Green/Yellow
Earth
Pink
10
Presence Relay N/C
White
11
Fault Relay
N/C
WARNING: 10.
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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
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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
11 PIN
FUNCTION
Wiring Harness
Connector
Wire COLOUR
Pin No.
Power supply
Red
Live
230V 10% 50/60 Hz
Black
Neutral
Grey
Violet
Yellow
Brown
Blue
Blue
Green/Yellow
Pink
White
WARNING: 11.
6.3
10
11
Fault Relay
N/O
Fault Relay
Common
Presence Relay N/O
Presence Relay Common
Loop
Twist this
Pair
Loop
Earth
Presence Relay N/C
Fault Relay
N/C
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
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
11 PIN
FUNCTION
Harness Wire
Connector
COLOUR
Pin No.
Red
Live
Power supply
12V –10% to 24V +10%
Black
Neutral
AC/DC
Grey
Fault Relay
N/O
Violet
Fault Relay
Common
Yellow
Presence Relay N/O
Brown
Presence Relay Common
Blue
Loop
Twist this
Pair
Blue
Loop
Green/Yellow
Earth
Pink
10
Presence Relay N/C
White
11
Fault Relay
N/C
WARNING: 12.
301UM0031_01
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
TD136 Enhanced Vehicle Detector User Manual
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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.
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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.
Check loop installation and
connections.
Loop may be too small or too
large.
Recut as per installation
instructions.
Faulty detector unit.
Replace unit.
After tuning, the loop output
LED flashes intermittently and
the relay chatters.
301UM0031_01
The loop is getting spurious
detects due to:
a) Crosstalk with adjacent
detector.
a) Change frequency
setting.
b) Faulty loop or feeder
connection.
b) Check that the feeders are
correctly connected and
adequately twisted.
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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
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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
Bicycle
Motorbike
Articulated Truck
Four Wheel Drive
5 Ton Tip Truck
Motor Car
Forklift
0.3 to 2
0.04
0.12
0.38
0.40
0.45
> 1.00
> 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
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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.
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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.
301UM0031_01
Changes or modifications not expressly approved
by the party responsible for compliance could void
the user’s authority to operate the equipment.
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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.
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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)_____________________________________
_________________________________________________________________________________
_________________________________________________________________________________
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POWER SUPPLY DETAILS:
Nominal Voltage: _______ V
AC or DC ?
Minimum Voltage: _______ V
Maximum Voltage: ________ V
______________ If AC then the Frequency _______ Hz
LOOP DETAILS
Size of loop:
___ m by ___ m
Shape of loop: _________________________________
Number of Turns: _____
Size of wire used (mm 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 mm or AWG) _____________ (should be 1.5 mm 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)
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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
301UM0031_01
Frequency 2:______________kHz
TD136 Enhanced Vehicle Detector User Manual
Page: 29 of 29

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