This document is for information only and unless otherwise indicated, is not to form part of any contract. In accordance
to alteration without notice.
Nortech International (Pty) Ltd
PO Box 4099 32A Wiganthorpe Road
Willowton Hub Pietermaritzburg
Pietermaritzburg 3201 South Africa
3200 South Africa Reg. No: 98/1095
Tel: (033) 345 3456 Int. Tel: +27 33 345 3456
Fax: (033) 394 6449 Int. Fax: +27 33 394 6449
Email: mkt@nortech.co.za URL: www.nortech.co.za
PD160 Enhanced Series
Inductive Loop Vehicle Detector
USER MANUAL
NORTECH INTERNATIONAL (PTY) LTD
All rights reserved
Copyright © 2011
Document Number: 304UM0001_00
Date of Issue: October 2011
with the manufacturer’s policy of continually updating and improving design, specifications contained herein are subject
Table of Contents
1.
INTRODUCTION ........................................................................................................................................ 5
2.
TECHNICAL DATA ................................................................................................................................... 6
2.1 Functional Data ...................................................................................................................................... 6
2.2 Electrical Data ........................................................................................................................................ 7
2.3 Environmental Data ................................................................................................................................ 7
2.4 Mechanical Data ..................................................................................................................................... 8
2.5 Approvals ................................................................................................................................................ 8
3.
OPERATING PROCEDURE ...................................................................................................................... 9
3.1 Hardware Set-Up .................................................................................................................................... 9
3.2 LCD Menu System ................................................................................................................................. 9
3.2.1 Idle Display .................................................................................................................................... 10
3.2.2 Frequency ..................................................................................................................................... 10
3.2.2.1 Automatic Frequency Selection ................................................................................................. 11
3.2.3 Sensitivity ...................................................................................................................................... 12
3.2.3.1 Automatic Sensitivity Boost ....................................................................................................... 12
3.2.4 Presence ....................................................................................................................................... 13
3.2.5 Relay ............................................................................................................................................. 13
3.2.5.1 Relay Pulse Width ..................................................................................................................... 14
3.2.5.2 Relay Output Delay (Filter) ........................................................................................................ 14
3.2.5.3 Output polarity ........................................................................................................................... 15
3.2.6 Diagnostics .................................................................................................................................... 15
3.2.7 Reset ............................................................................................................................................. 17
3.2.7.1 Power fail ................................................................................................................................... 18
3.3 Front Panel Indicator ............................................................................................................................ 19
4. PRINCIPAL OF OPERATION ................................................................................................................. 20
4.1 Detector Tuning .................................................................................................................................... 20
4.2 Detector Sensitivity ............................................................................................................................... 20
4.3 Types of Output .................................................................................................................................... 21
4.3.1 Presence Output ................................................................................................................................... 21
4.3.2 Pulse Output ......................................................................................................................................... 22
4.4 Response Times ................................................................................................................................... 22
5.
INSTALLATION GUIDE .......................................................................................................................... 23
5.1 Product Safety Requirements............................................................................................................... 23
5.2 Operational Constraints ........................................................................................................................ 23
5.2.1 Environmental Factors to Consider ............................................................................................... 23
5.2.2 Crosstalk ....................................................................................................................................... 24
5.2.3 Reinforcing .................................................................................................................................... 24
5.3 Loop and Feeder Material Specification ............................................................................................... 24
5.4 Sensing Loop Geometry ....................................................................................................................... 25
5.5 Loop Installation ................................................................................................................................... 26
6.
CONFIGURATION ................................................................................................................................... 28
6.1 PD161 Enhanced Series Detector : English......................................................................................... 28
6.2 PD162 Enhanced Series Detector : English......................................................................................... 29
6.3 PD164 Enhanced Series Detector : English......................................................................................... 29
7.
APPLICATIONS ...................................................................................................................................... 30
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 2 of 39
8.
CUSTOMER FAULT ANALYSIS ............................................................................................................ 31
8.1 Fault Finding ......................................................................................................................................... 31
8.2 Detector On Board Diagnostics ............................................................................................................ 32
8.3 Functional Test ..................................................................................................................................... 32
APPENDIX A - FCC ADVISORY STATEMENT ................................................................................................ 33
APPENDIX B – INSTALLATION OUTDOORS .................................................................................................. 34
Appendix B.1 IEC 60950-22:2005 – Outdoor cabinet .................................................................................. 34
Appendix B.2 IEC 60950-22:2005 - Northern Europe ................................................................................. 34
Appendix B.3 IEC 60950-1:2005 – Overvoltage Category .......................................................................... 34
APPENDIX C – REQUEST FOR TECHNICAL SUPPORT FORM .................................................................... 35
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 3 of 39
WARNING: 1. This unit must be grounded (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. No 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.
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 4 of 39
1. INTRODUCTION
The PD160 Enhanced Series Single Channel Inductive Loop Vehicle Detector is a microprocessor
based detector designed specifically for parking and vehicle access control applications. It is suited
primarily to complex multilane access control and counting applications. Using the most up-to-date
technology, the PD160 has been designed 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. With the on-board
diagnostics and automatic frequency selection to assist with installation, as well as customisable
outputs, the product is easily configurable to suit most applications.
With the introduction of the easy to operate LCD menu system, settings can be changed for
frequency, sensitivity, presence modes, as well as configurable and interchangeable output
combinations. The menu also provides access to a host of diagnostic and statistic information.
Over and above the LCD menu system, the PD160 provides additional visual outputs (LED’s) on the
front of the enclosure to provide an indication of the state of the channel as well as the detector itself.
The channel LED indicates whether a vehicle is present over the loop or there is a fault on the loop
while the power LED indicates that the unit has been powered and is operational or whether the
channel has recovered from a fault.
The unit has relay change-over contacts on the 11 pin connector at the rear of the enclosure, for
providing outputs as selected through the menu system.
Related Documents:
Data Sheet Document No. 304DS0001
Installation Leaflet Document No. 304LF0001
1 Channel Vehicle Detector Installation Guide Document No. 300LF0006
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2. TECHNICAL DATA
2.1 Functional Data
Tuning Fully Automatic
Self-tuning range 20 µH to 1500 µH
Sensitivity Fifteen step adjustable on the LCD menu
Ranging from 0.01% L/L to 5% L/L
ASB (Automatic Sensitivity Boost) selectable
Frequency Eight step adjustable on LCD menu
12 – 80 kHz (Frequency determined by loop geometry)
AFS (Automatic Frequency Selection) selectable
Output Configuration 2 output relays (3rd output optional)
User configurable for: Presence on detect or fault
Pulse on detect, un-detect, or fault
Normally Open (N/O) contacts
(Opto-Isolated outputs are available on request. MOQ applies)
Pulse Output Duration Eight step selectable on the LCD menu
Ranging from 50ms to 2seconds (Default set to 150ms)
Filter (Delay) Eight step selectable output filter
Ranging from 100ms to 10seconds (Default is OFF)
Presence Method Permanent or Limited to approximately 1 hour for a 1% L/L
Presence Time Eight step selectable on LCD menu
Drift Compensation Rate Approx. 1 %∆L/L per minute
Response Times 100-200 milliseconds (subject to sensitivity level and level of detect,
Visual Indications 1 x Power / Status LED – Red
1 x Channel Status LED – Green
LCD diagnostics displays
Reset Selectable through the menu structure for:
Resetting Channel Statistics
Retuning Channel
Resetting settings to factory default
Surge protection Loop isolation transformer, gas discharge tubes,
Power Fail Selectable to have infinite memory retention of detector state on
Ranging from 30seconds to 60minutes (Default is OFF)
as well as speed of vehicle over the loop)
and Zener diode clamping on loop input
power failure (provided certain criteria are met. Refer to section
3.2.7.1.
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2.2 Electrical Data
Power requirements 120 V
230 VAC ± 10% (48 to 62Hz) (PD162)
Requirement: 1.5 VA Maximum @ 230 V
Requirement: 1 VA Maximum @ 12 V
Relay Contact Rating Relays rated – 1 A @ 230 V
Optional – Opto Isolated 50mA @ 30V
maximum current as per graph below:
2.3 Environmental Data
± 10% (48 to 62Hz) (PD161)
AC
12 V -10% to 24 V +10% DC/AC (48 to 62Hz) (PD164)
AC
DC
For ambient temperatures above 60°C De-rate the rel ay
Storage Temperature -40°C to +80°C
Operating Temperature -30°C to +70°C (as a funct ion of the LCD)
(below -20°C the LCD response time is affecte d)
Humidity Up to 95% relative humidity without condensation
Circuit protection Conformal coating over the PCB and all components
IP Rating IP30 – This product MUST be installed in an enclosure
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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 ( High ) X 41mm ( Wide ) X 80mm ( Deep )
77.7 mm
2.5 Approvals
80 mm
40.6 mm
75.9 mm
CE Regulations: EN 301 489-3 Equipment Type: III
Class of Equipment: 2
EN 50293 Performance Criteria B
Safety: IEC / EN 60950-1
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3. OPERATING PROCEDURE
3.1 Hardware Set-Up
The PD160 Enhanced Series 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 LCD Menu System
Normal Display
Frequency
Settings
Sensitivity
Settings
Presence
Settings
Relay Settings
Diagnostics
Reset Settings
Go back…
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3.2.1 Idle Display
The menu system does NOT interfere with the operation of the unit; it merely provides the ability to
change settings and to view diagnostics. The unit is fully operational while menu settings are changed
and most settings have immediate effect.
3.2.2 Frequency
The loops connected to multichannel detectors are not susceptible to crosstalk due to the design of the
loop interface. For more information about crosstalk refer to section 5.2.2.
The frequency setting allows the operating frequency of the loop to be shifted higher or lower
depending on the selection. However, the operating frequency of the detector channel is determined
by a combination of:
Inductance of the loop and feeder cable
Detector frequency settings
The operating frequency of the detector channel increases as the loop inductance decreases and vice
versa. The inductance of the loop and feeder cable is determined by:
Size of the loop
Number of turns in the loop
Length of feeder cable
As a general rule, the detector connected to the inductive loop with the greatest inductance should be
set to operate at the lowest frequency.
If the frequency reading from the on-board diagnostics is close to the maximum frequency, the
inductance of the loop is too low and more turns need to be added to the loop. However if the reading
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.
The idle display is the normal display shown when not in the menu
system. It displays the model of the unit. Any button pressed will
enter the menu system. The up () and down () arrows are used to
navigate the system, while the enter button is used to select items,
e.g. changing settings, going deeper into the menu, or going back.
Under normal operating conditions, if a button is inadvertently
pressed, or during the use of the menu system, the menu will go back
one display every 25 seconds. This is not the case in the diagnostics
thus keeping certain desired information on display.
The frequency settings menu is the first menu and is used to shift the
operating frequency of the detector. This is primarily used to handle
situations in which more than one detector is used at the same site.
The detectors must be set-up to ensure no crosstalk (interference)
occurs between adjacent loops connected to different detectors. This
is 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.
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Setting Offset
8 Highest 8%
7 6%
6 4%
5 2.5%
4 2%
3 1.5%
2 1%
1 Lowest 0%
AFS Automatic
End1
Selecting any one of these manual settings will put the detector into manual frequency selection and
retune the channel to that setting. At each extreme of high frequency and low frequency, there will be
some settings which don’t allow the channel to tune as the frequency shift could push the frequency
out of the acceptable operational range. It is possible for the operational frequency to be sufficiently
high or low that none of the selections are tuneable. In this situation, refer to the on-board diagnostics.
There are eight manual frequency shift selections to choose from,
numbered from 1 to 8, with 1 producing the lowest frequency and
8 the highest. The amount the frequency is shifted depends on
the inductance of the loop and feeder cable but is approximately
equivalent to the offset value shown in the table (where the value
shown is the percentage shift up in frequency from the lowest
setting). This amount decreases slightly for smaller inductances.
Due to the non-linear nature of the oscillator, the higher
selections produce more of a shift than the lower ones.
The eight settings allow a shift across the tuneable inductance
range of over 20%.
3.2.2.1 Automatic Frequency Selection
The PD160 Enhanced Series introduces the new Automatic Frequency Selection (AFS) which is
turned on by default. This setting allows the detector to briefly evaluate all eight frequency shifts and
select the best frequency offset available. It weighs up each selection based on where the frequency is
located within the operational range, the signal strength, and the level of detected noise. AFS allows
the detector to evaluate all the frequency selections where-as if it is deactivated, the detector only
evaluates the user selected frequency.
Due to the increased processing required, AFS takes longer to tune
than when it is deactivated. When AFS is activated, under the normal
or idle display, the display will indicate that it is attempting to tune.
The tune time with AFS on can range from 5 to 20 seconds. If after
this period of time, the detector still has not tuned, refer to the onboard diagnostics as it is also possible that none of the frequency
selections are suitable. In this case the detector will indicate a fault
under the diagnostics displays.
Due to the sporadic nature of noise, the channel may seem quiet during the evaluation but still suffer
from cross-talk. There may be some extreme cases where the 20% shift in frequency is insufficient to
handle the amount of cross-talk.
For more information on cross-talk, refer to the installation guide at section 5, specifically section 5.2.2.
For more information about diagnostics, refer to section 3.2.6.
For more information about tuning refer to section 4.1.
AFS can be toggled on or off via the frequency menu. When activated, the channel will be retuned to
find the best frequency of operation. When deactivated, if the channel is tuned, it will not retune but
remain at the previously selected frequency. If deactivated while the detector is tuning, it defaults to
setting 5 of 8. In this situation, it is recommended that the user selects a frequency setting.
While the detector is tuning, it is recommended to allow the previous selection to complete.
On both manual and automatic frequency selection, once a valid frequency offset has been selected,
the detector waits for that setting to settle below the sensitivity setting before allowing normal operation
to continue. If there is sufficient drift from an extreme temperature change in the installation location or
vehicles driving over the loop at the time, it is possible that the tuning will timeout, invalidate that
frequency selection and attempt to tune again. The diagnostic displays will indicate drift in this
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 11 of 39
situation. If the situation is very close to the limit, it is possible that it might tune as the
drift or noise goes back over the threshold and the unit goes into detect just as it
tunes. In a noisy environment, this can be prevented by retuning and if the situation persists to
decrease the channel sensitivity or increase the relay output delay.
The PD160 Detector can handle environmental conditions that cause the frequency to drift up at a rate
of approximately 1 %∆L/L per minute. Above this, false detects can occur.
If the drift is high it could be a possible fault with the loop or feeder cable. Possibly the wire insulation
has deteriorated and moisture is causing a short to earth or 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 the
Diagnostic Unit DU100 User Manual Document No. 895UM0001.
3.2.3 Sensitivity
The sensitivity of the detector determines the change of inductance
necessary to produce a detect. The PD160 provides a much larger
range of sensitivities, with fifteen available settings.
Defined as the percentage change in inductance, the sensitivity
selections range from 0.01% which is the highest sensitivity, to 5.0%
as the lowest sensitivity.
Setting
0.01% Highest
0.02%
0.03%
0.04%
0.05%
0.06%
0.07%
0.08%
0.09%
0.10%
0.20%
0.50%
1.00%
2.00%
5.00% Lowest
ASB Automatic Sensitivity Boost
For a standard loop of 1.0 metres by 2.0 metres with 2 turns (circumference less than 10 m) and a ten
metre feeder cable the above right table shows typical sensitivity values for different vehicle types. For
more information about Sensitivity refer to the “Theory of Application” section in Diagnostic Unit
DU100 User Manual Document No. 895UM0001.
3.2.3.1 Automatic Sensitivity Boost
Automatic sensitivity boost (ASB) is a mode which alters the un-detect level of the detector, and can
be toggled on or off via the sensitivity menu.
ASB 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 preselected level.
VEHICLE TYPE
Metal Supermarket Trolley
Bicycle 0.04
Motorbike 0.12
Articulated Truck 0.38
Four Wheel Drive 0.40
5 Ton Tip Truck 0.45
Motor Car > 1.00
Forklift > 1.00
%∆L/L
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3.2.4 Presence
Limited presence, however, is aimed at limiting the presence of a vehicle over the loop. This is used in
situations where statistics or control is involved and a vehicle parked over the loop should not prevent
continued operation. The presence is limited to approximately one hour for a 1% L/L.
The presence mode can be toggled between permanent and limited presence via the presence menu.
In addition to the mode selected, a time-out may be set which operates in both modes. The time-out
selections range from 0 (off) to 60 minutes. If limited presence is selected and a time-out is defined,
the first time to expire will release the detect, effectively tuning out the vehicle’s presence. In this way,
subsequent vehicles travelling over the loop may be processed.
Setting
0 sec (Off)
30 sec
1 min
4 min
10 min
20 min
40 min
60 min
Presence (Permanent or Limited)
3.2.5 Relay
The PD160 Enhanced Series provides user defineable outputs on each relay. The detector setup
allows for relay outputs to be generated in the event of a vehicle entering, being present on or exiting
the loop.
Whether the relay is activated on presence or a pulse signal is selected, the delay time and fail-safe /
secure settings for the channel can also be adjusted. A detect is classified as the entry of a vehicle
onto the loop, where an un-detect is the exit of the vehicle from the loop.
The presence setting determines how the detector handle detects.
There are two modes to choose from, namely permanent presence
and limited presence.
Permanent presence mode is aimed at maintaining the presence of a
vehicle over the loop by continuously compensating for all
environmental changes. This is used in situations where safety is
involved and the detector is required to maintain the detect.
The relay menu allows for complete customisation of the outputs.
After selecting which relay to adjust, each relay output may be set to
any possible combination of presence event, or pulse event (i.e.
pulse on detect or un-detect), pulse duration and output delay. Only
once a final presence or pulse setting has been selected will the new
setting take effect.
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Setting
Presence
Fault
Pulse
Un-Detect
Fault
150ms
250ms
750ms
900ms
1sec
2sec
Delay Output
100ms
250ms
500ms
1second
2seconds
5seconds
10seconds
Polarity
Detect
Detect
Pulse Width
500ms
0sec (off)
(fail safe / secure)
3.2.5.1 Relay Pulse Width
Under the pulse sub-section of the relay menu, pulse widths range
from 50ms to 2seconds and can be different on each relay.
Short pulses are used in responsive systems where higher speed
outputs can be individually processed, or limited to a shorter period of
time than the time the vehicle remains over the loop. Longer pulses
may be used where the output required is longer than the time the
vehicle remains over the loop.
3.2.5.2 Relay Output Delay (Filter)
From the relay menu, the delay time (filter) setting ranges from zero
(off) to 10 seconds and allows the output to be delayed accordingly.
By setting a non-zero delay, the output delay feature is turned on.
Small unwanted objects may be filtered out as a vehicle has to be
present over the loop for the full duration of the delay in order to
produce an output.
The delay time may be applied on any sensitivity level and may be different on each relay. It may also
be used on either presence or pulse output.
50ms
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3.2.5.3 Output polarity
The relay output polarity may be toggled between fail-safe and fail-secure via the relay menu.
In fail-safe, the output is the same in detect as it is with no power applied to the unit. Related to an
access control situation, this is used in situations where the loss of power must not lock people out.
Either a valid detect situation, or a power failure / fault will provide a signal.
In fail-secure, the output is the same in un-detect as it is with no power applied to the unit. Related to
an access control situation, this is used in situations where the loss of power must not allow people
free entry. Only a valid detect situation will provide a signal.
If installed correctly, the normally open contacts should be open in the event of no vehicle over the
loop and closed for a vehicle present over the loop. Units supplied with relays set to presence by
default are wired as fail-safe relays. Relays set to pulse by default are wired as fail-secure relays.
If the state of the output when the detector is off is not of concern, the polarity function can effectively
be used to flip the output logic on that relay.
3.2.6 Diagnostics
Users familiar with the DU100 from the PD130 range will find similar
features in the on-board diagnostics facility. The PD160 Enhanced
Series detectors are constantly monitoring their operation and
providing diagnostic information. Additionally, statistical information
such as the min and max values and the number of vehicles counted
are provided.
The following parameters may be verified using the diagnostics:
• Loop status – Display the actual loop operating frequency and magnitude of the current change of
loop inductance %∆L/L as well as signal and noise levels.
• Sensitivity – Display the minimum and maximum changes of inductance %∆L/L that caused a
detect since the statistics were last cleared.
• Channel counts – Display the number of vehicles detected.
This historical information is valuable for providing information about intermittent faults. It is highly
recommended that after installation of a detector (or if the loop has been changed in any way) that the
diagnostics 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 C could be used to record these readings.
The sub-menus for diagnostics are as follows:
The frequency sub-menu shows the current frequency in kilohertz as
well as the individual max and min. The frequency is inversely
proportional to the inductance, so low inductances will show high
frequencies while high inductances will show low frequencies.
Depending on the frequency setting, the displayed values could be
from 12 to 80 kilohertz in the 20 to 1500uH range.
The sensitivity sub-menu shows the current percentage change in
inductance. Detects are shown as negative values and anti-detects
are shown as positive values. The max value will show the largest
percentage change noted while the min value will show the smallest
peak value of any one vehicle detected.
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The noise sub-menu shows the instantaneous noise measured over
a short period of time. Due to the sporadic nature of noise, it is
difficult to determine the difference between true noise and faster
moving vehicles which produce large detect levels. As such, the max
value may show a larger number as a function of some vehicle detect
properties. Simply reset the statistics and monitor the max without
vehicles passing over the loop to get a better indication.
The signal sub-menu shows the percentage of the maximum signal
strength able to be processed by the microprocessor. While the
signal should reflect 100% across the inductance range, it is normal
for it to start to drop slightly at very low inductances towards the edge
of the range. If the feeder cable is too long or the series resistance is
too high, the signal level will be seen to drop further. The detector
does not allow a loop to tune if the signal strength is below 35%.
The channel count sub-menu shows the number of vehicle detects as
a function of sensitivity and presence. It should be noted to prevent
confusion that this is NOT necessarily the same as the number of
relay output events, depending on your output settings. For example,
fault outputs would yield a different total output count from the
number of vehicles detected.
Where the current value is shown (as opposed to max and min) and the channel is in fault, the current
fault will be displayed. The possible fault displays are:
Short circuit The loop is showing short circuit properties. These include, but are not limited
to, very low signal level or very high frequency.
Open circuit The loop is showing open circuit properties. This is seen at very low
frequencies and in some cases at low signal level. From frequency shift
setting 5 and upwards, an open circuit does not oscillate and looks like a
short circuit. Manually select frequency 1 to confirm an open circuit condition.
Signal In trying to retune, the loop signal level was found to be too low to measure
reliably. This could be due to, but is not limited to, very low inductance or high
feeder cable resistance.
Noise In trying to retune, the detector found large movements determined to be
noise. This could be due to, but is not limited to, crosstalk from other loops or
vehicles driving over the loop during tuning.
Drift In trying to retune, the detector found unidirectional movements (either up or
down in frequency) which exceed the sensitivity. This could be due to start-up
conditions but is also noted at higher sensitivity levels at the extreme high and
low inductances.
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3.2.7 Reset
The following sub-menu options are available:
The reset menu is used for resetting detector values or functionality.
It also provides access to the way the detector responds to a
recovery from a loss of power in the powerfail setting.
The stats sub-menu is for clearing the statistical information of the
detector used in the diagnostics menu. This is basically the max and
min values as well as the channel counts and the recovered from
fault state. This can also be achieved by power cycling the unit.
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,
the retune sub-menu provides the ability to re-initiate the automatic
tuning cycle. If there is a vehicle on the loop when a retune is
requested, it will be tuned out.
Every setting change done by the user is saved when the unit loses
power. For this reason, this Factory Reset sub-menu restores all the
settings to the factory defaults for the specific model after asking for
confirmation.
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3.2.7.1 Power fail
The memory retention of the vehicle is designed to be infinite, but is subject to the following limitations:
The level of the detect must be sufficiently greater (at least 0.5%) than the sensitivity level or
else the maximum potential temperature drift from one time of day when the power fails to
another when the power returns mustn’t exceed 20°C.
The level of the detect should be no less than 0.15% and a minimum of 0.15% above the
sensitivity level.
If the presence of a vehicle should occur less than a second before power is lost, there is a
chance that the unit won’t retain the detect and the outputs could toggle on restoration of
power.
If these conditions are not met, it is possible for the detect condition to be lost on recovery of power.
If Powerfail is used in conjunction with AFS and there is a concern of a channel going into fault, use
AFS to select the best band and then turn it off to prevent the unit retuning on recovery.
The powerfail setting may be toggled on and off via this selection in
the reset menu. Off by default, this setting is designed to retain the
memory of a vehicle on the loop in the event of a power fail situation.
This is designed specifically for fail-safe situations to retain the output
state and prevent a glitch on the outputs for a power failure. As such,
when the power is restored, the detector will not retune but return to
the detect state prior to the power failure. If a vehicle was on the loop
during the power failure, it will remain detected when the power is
restored. Thus it prevents the tuning out of a vehicle over the loop
during a power failure condition.
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 18 of 39
3.3 Front Panel Indicator
The front panel indicators consist of a Red Power / Status LED and a Green Channel LED.
There are four possible conditions which are indicated by the LED’s.
• Idle condition – no vehicle is detected
• Detect condition – a vehicle is detected passing over the inductive loop
• Tuning condition – the detector is currently tuning to the loop
• Fault condition – the detector is unable to tune to the loop as it is either out of operational
conditions such as low signal strength or frequency out of range, or there exists a fault on the loop
such as a short circuit or an open circuit.
If a loop fault exists, the Green Channel LED will come on and flash at a rate of 2Hz indicating the
fault. If the fault is self-healing the detector will continue to operate but the LED will flash at a slower
rate of 1Hz indicating to the user that a fault has occurred. The detector must be power cycled or have
the statistics cleared in order to clear the historical fault information.
In order to distinguish between a detect condition and a tuning condition, the Channel LED displays
the same in tuning as it does in fault.
Once the channel is tuned, the Green Channel LED will go off. As indicated above, if the unit has
recovered from a fault, the channel LED will flash at 1Hz, otherwise it will remain off.
In the event of a vehicle being detected passing over the inductive loop, the Green Channel LED will
light up indicating the presence of a vehicle and remain on for the duration of the detected vehicle.
It should be noted, however, that the Channel LED does NOT necessarily represent the output state of
the relays. It only represents the detection of a vehicle over the loop. The relay state could for example
be different from the LED state in the case of a pulse output after its pulse duration, a fault output, or a
delayed (filtered) output. The only time the Channel LED will go off while a vehicle is still present is if a
presence time is set and has expired or if the channel is in limited presence mode and has expired.
The Red Power LED indicates that the unit is powered and functional. In the event of a fault recovery,
the Red Power LED will flash at the rate of 1Hz, out of sync with the channel LED, to indicate that the
channel has recovered from a fault. This is to provide visibility if the channel is in detect at the time of
viewing.
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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. The detector will re-tune if any of the following events occur:
- When power is applied to the detector
- A channel reset is initiated via the menu system.
- A detect of greater than 16% ∆ L/L occurs.
- A fault has occurred and is self-healing.
The detector will automatically tune to any loop with an inductance in the range 20 to 1500 microhenries (H).
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.
For more information about tuning, noise and drift refer to section 3.2.2.1.
For more information about diagnostics, refer to section 3.2.6.
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 LCD Menu system on the front of the enclosure.
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Multiple sensitivity levels have been provided in the PD160 Enhanced Series Detector to cater for a
wide range of parking and vehicle access control applications. The detection of small unwanted
objects such as bicycles and trolleys may be eliminated by selecting lower sensitivity levels whilst highbed vehicles and vehicle/trailer combinations will not lose detection by using Automatic Sensitivity
Boost (ASB) option.
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 Types of Output
Each relay output may be configured to be either a presence or pulse output. Refer to section 3.2.5 for
more information on how to set the outputs.
4.3.1 Presence Output
When a relay is configured as a presence output, it will produce a continuous output during the
presence of a vehicle over the inductive loop, or during the presence of a fault, depending on whether
configured as presence on detect or presence on fault from the relay menu. Default is presence on
detect and is used in the paragraphs below.
When the presence method is set to permanent, the relay will indicate vehicle presence for an
unlimited period of time. However on limited presence, the detect time will be dependant on the
change of inductance. The presence time on the limited presence setting will be approximately 1 hour
for a 1% ∆ L/L. Refer to section 3.2.4 for more information on presence methods.
The presence outputs are known as fail-safe outputs. This implies that in the event of a power failure
or loop failure the relays will produce detect outputs. By default on the PD160, relay1 is configured as
a presence output and so is a fail-safe output. (Fail-Secure outputs are available on request. MOQ
applies)
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4.3.2 Pulse Output
When configured as a pulse output, the relay will output a pulse according to the pulse duration setting
(default is 150ms). The output may be set to be any of the following:
• Pulse on detect – the detector will give a pulse output on detection of a vehicle.
• Pulse on un-detect – the detector will give a pulse output when the vehicle leaves the loop.
• Pulse on fault – the detector will give a pulse output when the channel goes into fault.
Pulse outputs are fail-secure outputs and will not operate if a failure occurs. By default on the PD160,
relay2 is configured as a presence output and so is a fail-secure output.
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 PD160 have been adjusted to prevent false operation in electrically noisy
environments, but retain adequate response to vehicles in parking and vehicle access control
applications.
The response time will be proportional to the level of sensitivity, the level of the detect and the speed
of the vehicle. In other words, a fast moving large detect will respond quicker than a slow moving small
detect. Also, if the sensitivity is set very low, the point at which it crosses the threshold will be later
than higher sensitivity settings. At maximum sensitivity however, the response time is slower than
other sensitivity levels to prevent false operation from noisy environments.
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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
• i) WARNING: The unit must be GROUNDED (earthed).
• ii) WARNING: Disconnect the power before working on the unit.
• iii) WARNING: On 120 VAC and 230 VAC models a readily accessible disconnect device
must be incorporated into the mains wiring (as per EN60950-1:2005 Section
1.7.2.2).
• iv) 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
60950-1:2005 section 1.7.2.3). Typically this will be a 5 Amp Magnetic Circuit
Breaker for AC models and a fuse for DC models.
• v) WARNING: This product must be installed in an enclosure as the IP rating of the detector
is IP 30.
• vi) WARNING: No user serviceable parts inside. No internal settings.
Warranty void if cover removed.
• vii) 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 an 11 pin wiring
harness, Nortech Part No. 302FT0041, 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 PD160 Enhanced Series 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 PD160 Enhanced Series parking detectors are rated to operate from -30°C to +70°C 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.
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 23 of 39
5.2.2 Crosstalk
When two loop configurations are in close proximity, the magnetic fields of one can overlap and disturb
the field of another loop. 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 electrical cables. The
screen must be earthed at the detector end only.
4. Running feeder cables in their own slots, separated by at least 300 mm.
For additional information on Crosstalk refer to the section “Crosstalk Prevention” in the DU100
Diagnostic Unit User Manual Nortech Document No. 895UM0001.
For information about resolving Crosstalk refer to the “Theory of Application” section in Diagnostic
Unit DU100 User Manual 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 ideal minimum spacing between the loop and the cable and steel reinforcing is 150mm, although
this is not always practically possible. The slot depth should be kept as shallow as possible, taking
care that no part of the loop or the feeder remains exposed after the sealing compound has been
applied.
5.3 Loop and Feeder Material 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.
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 24 of 39
Stranded loop wire is preferred over solid wire. Because of its mechanical
characteristics, a stranded wire is more likely to survive bending and stretching than a
solid.
A heavy gauge conductor is definitely desirous in order to maintain the loop Q-factor. The loop and
feeder should preferably constitute a single length of insulated multi-stranded copper conductor, with
no joints and with the copper having a minimum cross section 1.5 mm2. The feeder is twisted to
minimise the effect of electrical noise.
Joints in the loop or feeder are not recommended. Where this is not possible, joints are to be soldered
and terminated in a waterproof junction box. This is extremely important for reliable detector
performance. Other forms of joins such as those available in kits, where the joint is properly sealed
against moisture, are also permitted
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 angles to the direction of traffic movement. These sides should
ideally be 1 metre apart.
Loops operating from the same detector module can share a common slot along one of the longer
sides, if so required. This type of configuration could be applied in a direction logic application. The
maximum separation permitted for this application is 1 metre, ensuring that a vehicle can straddle both
loops simultaneously in the required direction of travel.
The only factor which governs maximum separation between loops in all other applications is the
feeder length, with 100 metres being the maximum recommended length.
The length of the loop will be determined by the width of the roadway to be monitored. The loop
should reach to within 300 mm 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.
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. MKT0001.
• “TRAFFIC DETECTION” - Nortech Doc. No. MKT0002.
• “PARKING APPLICATIONS MANUAL” - Nortech Doc. No. MKT0003.
• “LOOPS and LOOP INSTALLATION” – Nortech Doc. No. MKT05
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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.
300 mm 300 mm
+/- 2 m depending on road width
1 m1 m
Min Distance Apart - 2 m (Road width = 2 m)
- 3 m (Road width = 4 m)
Max Distance Apart – No Limit
Figure 5.1 Adjacent loops connected to different detector modules
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 26 of 39
30 – 50 mm
4 mm
Figure 5.2 Slot Details
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301FT0041
11 PIN
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 PD160 models.
On other models the pin assignments may change.
WARNING: 9. The wiring harness is only rated for SELV voltages
(less than 60 V dc or less than 42 V ac).
If the relays are to switch higher voltages use CE
LVD approved 11 pin sockets.
NOTE 2: All relay contact descriptions refer to the tuned and undetected state.
6.1 PD161 Enhanced Series Detector : English
11-pin connector wiring for PD161 DETECTOR - Order number 304FT1001
Wiring Harness
Wire COLOUR
Red 1 Live
Black 2 Neutral
Grey 3 Relay 2 N/O
Violet 4 Earth
Yellow 5 Relay 1 Common
Brown 6 Relay 1 N/O
Blue 7 Loop Twist this
Blue 8 Loop
Green/Yellow 9 Relay 2 Common
Pink 10 Relay 1 N/C
White 11 Relay 2 N/C
Connector
Pin No.
FUNCTION
120 V AC ± 10%
30 mA 60 Hz
Pair
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 28 of 39
301FT0041
11 PIN
301FT0041 Wiring
11 PIN
6.2
PD162 Enhanced Series Detector : English
11-pin connector wiring for PD162 DETECTOR - Order number 304FT1002
Wiring Harness
Wire COLOUR
Red 1 Live
Black 2 Neutral
Grey 3 Relay 2 N/O
Violet 4 Relay 2 Common
Yellow 5 Relay 1 N/O
Brown 6 Relay 1 Common
Blue 7 Loop Twist this
Blue 8 Loop
Green/Yellow 9 Earth
Pink 10 Relay 1N/C
White 11 Relay 2N/C
Connector
Pin No.
FUNCTION
230 V AC ± 10%
20 mA 50 Hz
Pair
6.3 PD164 Enhanced Series Detector : English
11-pin connector wiring for PD164 DETECTOR - Order number 304FT1004
Harness Wire
COLOUR
Red 1
Black 2
Grey 3 Relay 2 N/O
Violet 4 Relay 2 Common
Yellow 5 Relay 1 N/O
Brown 6 Relay 1 Common
Blue 7 Loop Twist this
Blue 8 Loop
Green/Yellow 9 Earth
Pink 10 Relay 1N/C
White 11 Relay 2N/C
Connector
Pin No.
FUNCTION
12 – 24V AC/DC ± 10%
45 – 65 Hz 200 mA max
Pair
WARNING: 10. The wiring harness wire colour to PIN No.
assignment only applies to the stated wiring
harness Part No.
Other wiring harnesses will have different wire
colour to PIN No. assignments.
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7. APPLICATIONS
The PD160 Enhanced Series 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 vehicle counting
Some of the features that make the PD160 Enhanced Series detectors 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
Red LED does not glow on
power up.
After the initial tune period the
CH1 Green Channel LED
remains flashing at 2Hz.
After tuning, the loop output
LED flashes intermittently and
the relay chatters.
CAUSED BY
If the indicator is off then there
is a fault on the power
connection to the unit.
Unit cannot tune to the loop
due to faulty loop or feeder
connection.
Loop may be too small or too
large.
Faulty detector unit.
The loop is getting spurious
detects due to:
a) Crosstalk with adjacent
detector.
b) Faulty loop or feeder
connection.
REMEDY
Check power feed to the unit.
Check on-board diagnostics to
confirm fault. Check loop
installation and connections.
Check on-board diagnostics to
confirm fault. Recut as per
installation instructions.
Replace unit.
a) Change frequency
setting.
b) Check that the feeders are
correctly connected and
adequately twisted.
304UM0001 Rev 00 PD160 Enhanced Series User Manual Page: 31 of 39
8.2 Detector On Board Diagnostics
For more information on the on-board diagnostics refer to section 3.2.6.
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 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.
Output relays set to PRESENCE will operate.
Output relays set to PULSE 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 on-board diagnostics 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: 11. 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 PD160 Enhanced Series 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 PD160 Enhanced Series 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 “Inductive Loop Vehicle Detector” installations it is highly recommended that you use
the on-board diagnostics. Refer to section 3.2.6 for details for more information.
Contact Details:-
Your company: ____________________________
Telephone No. _______________________ Mobile/Cellphone No. _________________
FAX No. ____________________________
Postal address: ____________________________________
_____________________________________
_____________________________________
Product Model (i.e. PD164) _____________ Product FT No. 304FT_____________
Product Serial Number: ___________________________
Site Name: __________________________________ Detector No.
What are the internal settings of the unit as accessed by the LCD Menu
___________ (Frequency Setting)
___________ (AFS Setting)
___________ (Sensitivity Setting)
___________ (ASB Setting)
___________ (Presence Limited or Permanent)
___________ (Relay 1 Setting Presence or Pulse and which (detect or undetect))
___________ (Relay 1 Delay (filter) setting)
___________ (Relay 1 Polarity setting)
___________ (Relay 2 Setting Presence or Pulse and which (detect or undetect))
___________ (Relay 2 Delay (filter) setting)
___________ (Relay 2 Polarity setting)
Your Name:
__________________________________
(at the site)
: ______________
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If a third relay is fitted:
___________ (Relay 3 Setting Presence or Pulse and which (detect or undetect))
___________ (Relay 3 Delay (filter) setting)
___________ (Relay 3 Polarity setting)
What application is this unit used in (short description)_______________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
POWER SUPPLY DETAILS:
Nominal Voltage: _______ V Minimum Voltage: _______ V Maximum Voltage: ________ V
AC or DC ? ______________ If AC then the Frequency _______ Hz
LOOP DETAILS
Size of loop: ____ m by ____ m
Shape of loop: _____________________
Number of Turns: _____
Size of wire used (mm2 or AWG) _____________
Type of wire insulation _____________________
Thickness of insulation:_____________ mm
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:
_____________________________________________________________________________
____________________________________________________________________________
_____________________________________________________________________________
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Are there any power cables below these loops
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Are there any other loops in the area
how close to these loops are they? ________ m
(Yes/No)
(Yes/No)
____ If so how many? ________ and
____ If yes please give details:
FEEDER CABLE DETAILS
Length of feeder cable ________ m
Size of wire used (mm2 or AWG) _____________
(should be 1.5 mm
Type of wire insulation _____________________
Thickness of insulation:_____________ mm
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)
Are there any other cables close to these feeder cables? (Yes/No) _____ If yes please give details:
2
or larger)
____________________________________________________________________
FEEDER CABLE and LOOP DETAILS
Is the loop and feeder cable one continuous
piece of wire or is there a joint between the
loops and the feeder?
Please give details:__________________________________________________________________
(Yes/No)
_______
____________________________________________________________________
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With the detector disconnected, measure the following:AC voltage between the two wires of the
feeder cable __________ V
AC voltage between one of the feeder cable
wires and earth __________ V
DC resistance of Feeder plus Loop: _______ ohms
Inductance of Feeder plus Loop: ________ µH
Frequency of measurement? ______ KHz
Loop and feeder resistance to earth
(with detector unplugged) using a
500V Megger: _________ Mega Ohms
(should be greater than 10 Mega Ohms)
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READINGS FROM ON-BOARD DIAGNOSTICS
Frequency ______________ kHz
Frequency Min ______________ kHz
Frequency max ______________ kHz
Sensitivity Min: ___________ %∆L/L
Sensitivity Max: ___________ %∆L/L
Channel Status:____________________________
(Undetect, Detect, Open circuit, Short circuit or Indeterminate)
Inductance Change
reading)
:
for each vehicle type
(Use the maximum sensitivity reading and reset the statistics between each
Vehicle Type Inductance Change
Bicycle
Motorbike
Car
SUV
Articulated truck
5 Ton Tip Truck
Forklift
Other type
(Please specify)
%∆L/L
%∆L/L
%∆L/L
%∆L/L
%∆L/L
%∆L/L
%∆L/L
%∆L/L
Comments:
_______________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
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