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 E-mail: mkt@nortech.co.za Int. Tel: +27 33 345 3456 Int Fax: +27 33 394 6449 URL: www.nortech.co.za PD230 Enhanced Vehicle Detector USER MANUAL NORTECH INTERNATIONAL (PTY) LTD All rights reserved. Copyright © 2009 Document No.
Table of Contents 1. INTRODUCTION........................................................................................................................ 5 2. TECHNICAL DATA .................................................................................................................... 6 2.1 Functional Data .......................................................................................................................... 6 2.2 Electrical Data ......................................................
Appendix B.3 IEC 60950-1:2005 – Overvoltage Category....................................................... 33 APPENDIX C - REQUEST FOR TECHNICAL SUPPORT FORM .................................................
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! WARNING: 5. Always suspend traffic through the barrier area during installation and testing that may result in unexpected operation of the barrier WARNING: 6.
1. INTRODUCTION The “PD230 Enhanced Two Channel Inductive Loop Vehicle Detector” is a dual channel microprocessor based detector designed specifically for parking and vehicle access control applications. The PD230 Enhanced detector has been designed using the latest technology in order to meet the requirements of a vast number of parking applications in terms of operating conditions. A number of internal functional options are available to the user.
2. TECHNICAL DATA 2.1 Functional Data 2.2 Tuning Fully automatic Self-tuning range 20 to 1000 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.
PD234 models: 1 VA Maximum at 12V Relay Contact Rating 2 x Relays rated - 5A @ 230 VAC For ambient temperatures above 60 °C De-rate the relay maximum current as per graph below Opto-Isolated Output rating 33 V 50 mA Note - Opto-Isolated Outputs are available on request. MOQ applies 2.
2.4 Mechanical Data Housing material ABS blend Mounting Position Shelf or DIN rail mounting Connections 11-pin submagnal type ( JEDEC No. B11– 88 ) Size of Housing 78mm ( High ) x 41mm ( Wide ) x 80mm ( Deep ) 2.5 75.9 mm 40.6 mm 77.7 mm 80 mm Approvals C.E.
3. OPERATING INSTRUCTIONS 3.1 Hardware Set-up The PD230 Enhanced dual 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.
Channel1 S6 S5 Off Off On Off Off On On On Channel 2 S4 S3 Off Off On Off Off On On On High Medium-High Medium-Low Low 3.2.3 Automatic Sensitivity Boost Automatic sensitivity boost is a mode which alters the undetect level of the detector. This mode is selected by switch No.
3.3 Internal Link Selection WARNING - ONLY SERVICE PERSONNEL MAY OPEN THE UNIT TO CHANGE INTERNAL SETTINGS! There is one 3 way link located inside the PD230 Enhanced detector housing, which is used to alter the mode of operation of the detector. The link has been placed inside the unit to avoid incorrect operation due to selection by an unauthorised operator. For a description of the AB Logic mode refer to section 4.
The channel LED will also glow whenever a vehicle is detected passing over the inductive loop. The Power LED at the top of the unit will remain on to indicate that the unit is powered. This LED is also used as the link to the diagnostic unit ( DU100 ).
4. PRINCIPLE 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 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.
reduced accordingly. When the ASB is enabled the undetect level will always be the same irrespective of the sensitivity setting and will be equivalent to the undetect level when the sensitivity is on maximum setting. 4.3 Modes of Operation The PD230 Enhanced Detector may be configured for any one of the following modes: Presence Mode Pulse Mode AB Logic Presence Mode (Barrier Operation) AB Logic Pulse Mode (Counting Logic) 4.3.
(Pulse on un-detect is available on request. MOQ applies) 4.3.3 AB Logic Presence Mode (Barrier Operation) Internal link LK1 shorted from Pin 1 to Pin 2. In this mode switches 9 & 10 are ignored. AB LOGIC Presence Mode is a direction logic mode, and is capable of determining direction of travel of a vehicle. Two loops are laid in the direction of travel to provide the input for this mode.
Case 2: (AB LOGIC Presence Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Exits Loop 1 D - Vehicle Exits Loop 2 This is the correct forward operation for Presence AB Logic Case 3: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Exits Loop 2 C - Vehicle Enters Loop1 D - Vehicle Exits Loop 1 Typically caused by loops being too far apart or very small vehicles Case 4: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B
Case 5: (AB LOGIC Presence Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Starts to reverse D - Vehicle Exits Loop 2 E - Vehicle Exits Loop 1 This case should not happen but it does occasionally Case 6: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Enters Loop1 C - Vehicle Starts to reverse D - Vehicle Exits Loop 1 E - Vehicle Exits Loop 2 This case should not happen but it does occasionally 4.3.
If a vehicle enters Channel 1 Loop and then proceeds to Channel 2 Loop, a 150 ms pulse will be issued on Channel 1 relay output as the vehicle leaves Channel 1 Loop. If a vehicle now enters Channel 2 Loop and then proceeds to Channel 1 Loop, a 150 ms pulse will be issued on Channel 2 relay output as the vehicle leaves Channel 2 Loop.
Case 4: (AB LOGIC Pulse Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Enters Loop1 C - Vehicle Exits Loop 2 D - Vehicle Exits Loop 1 This is the correct reverse operation for Pulse AB Logic Case 5: (AB LOGIC Pulse Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Starts to reverse D - Vehicle Exits Loop 2 E - Vehicle Exits Loop 1 Forward direction.
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 by bearing the following constraints in mind, and strictly following the installation instructions.
5.2.2 Crosstalk When two or more loop configurations are in close proximity, the magnetic fields of one loop can overlap and disturb the field of an other loop. This phenomena, is known as crosstalk, it can cause false detects and detector lock-up. Should the loops be connected to the same dual channel detector crosstalk will not occur, due to the fact that sequential polling of the loops takes place, resulting in only one loop being energised at a given time.
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.
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. +/- 2 m depending on road width 300 mm 1m 300 mm 1m Min Distance Apart - 2 m (Road width = 2 m) - 3 m (Road width = 4 m) Max Distance Apart – No Limit 30 – 50 mm Figure 5.
Figure 5.
6. CONFIGURATION WARNING: 8. assignments The connector PIN 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 PD230 Enhanced detector 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.
6.2 PD232 Enhanced Detector: English 11 – PIN CONNECTOR WIRING for: 302FT0026 302FT0041 WIRING HARNESS WIRE COLOUR Red Black Blue Blue Yellow Yellow Grey Grey Green/Yellow White White 6.3 11 PIN Connector Pin No.
7. APPLICATIONS The PD230 Enhanced dual channel detectors can be used in a variety of applications in the parking and door/gate environments.
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 Ch1 and/or Ch2 indicator is green. Turning off for half second periods. 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.
8.2 DU100 – Detector Diagnostic Unit The DU100 Diagnostic unit is a hand-held test instrument that has been designed to operate with the PD230 Enhanced detector to provide installation/service personnel with positive verification of the correct operation of the vehicle detector and its installation. 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.
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 PD230 Enhanced Detector can handle environmental conditions that can cause the frequency to drift up to at a rate of approximating 1% ∆L/L per minute.
8.3 Functional Test To test a detector, connect it to an inductive loop with a total inductance in the order of 300 microhenries. (This may be achieved in the workshop by winding (x) turns of wire on a 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.
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.
APPENDIX B – INSTALLATION OUTDOORS Appendix B.1 IEC 60950-22:2005 – Outdoor cabinet If the PD230 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.
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.
POWER SUPPLY DETAILS: Nominal Voltage: _______ V ________ V AC or DC ? Minimum Voltage: _______ V Maximum Voltage: ______________ If AC then the Frequency _______ Hz LOOP DETAILS Channel 1 Size of loop: Channel 2 ____ m by ____ m Size of loop: ____ m by ____ m Shape of loop: _____________________ Shape of loop: _____________________ Number of Turns: _____ Number of Turns: _____ Size of wire used (mm2 or AWG) _____________ Size of wire used (mm2 or AWG) _____________ Type of wire insulation ___
_________________________________________________________________________ ________ 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: _________________________________________________________________________________ ___________________________________________________________________ FEEDER CABLE and LOOP DETAILS Channel 1 Channel 2 Is the loop and feeder
READINGS FROM DU100 DIAGNOSTICS UNIT On arrival at site Time since last retune: ___________ days _____________ hours Reason for Retune 15 % ∆ L/L (typical): (Reset: manual or power failure, Short circuit, Open circuit, Indeterminate, Inductance change of greater than _______________________________________________ Channel 1 Channel 2 Frequency ______________ kHz Frequency ______________ kHz Loop Frequency Drift __________ % Loop Frequency Drift __________ % Sensitivity Min: ___________ %∆L/L Sensit
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 E-mail: mkt@nortech.co.za Int. Tel: +27 33 345 3456 Int Fax: +27 33 394 6449 URL: www.nortech.co.za TD236 Enhanced Vehicle Detector USER MANUAL NORTECH INTERNATIONAL (PTY) LTD All rights reserved. Copyright © 2009 Document No.
Table of Contents 1. 2. INTRODUCTION ............................................................................................................................. 5 TECHNICAL DATA ......................................................................................................................... 6 2.1 Functional Data .......................................................................................................................... 6 2.2 Electrical Data ..........................................
Appendix B.2 IEC 60950-22:2005 - Northern Europe .............................................................. 31 Appendix B.3 IEC 60950-1:2005 – Overvoltage Category....................................................... 31 APPENDIX C - REQUEST FOR TECHNICAL SUPPORT FORM.......................................................
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! WARNING: 5. USA FCC Advisory Statement – Refer to Appendix A at the end of this document. WARNING: 6. Europe Disposing of the product.
1. INTRODUCTION The “TD236 Enhanced Two Channel Inductive Loop Vehicle Detector” is a dual channel microprocessor based detector designed specifically for traffic control applications. The TD236 Enhanced detector has been designed using the latest technology in order to meet the requirements of a vast number of traffic applications in terms of operating conditions. A number of internal functional options are available to the user.
2. TECHNICAL DATA 2.1 Functional Data 2.2 Tuning Fully automatic Self-tuning range 20 to 1000 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 selectable: Frequency dependent on loop size Modes Output relays may operate in the Presence ( fail-safe ), or Direction logic modes Presence Time Switch selectable: 1 Second 4 Minutes 40 Minutes No fixed time-out (dependant on inductance change) Approx.
Relay Contact Rating 2 x Relays rated - 5A @ 230 VAC For ambient temperatures above 60 °C De-rate the relay maximum current as per graph below Opto-Isolated Output rating 33 V 50 mA Note - Opto-Isolated Outputs are available on request. MOQ applies 2.3 Environmental Data Storage Temperature -40°C to +85°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 IP 30.
2.4 Mechanical Data Housing material ABS blend Mounting Position Shelf or DIN rail mounting Connections 11-pin submagnal type ( JEDEC No. B11– 88 ) Size of Housing 78mm ( High ) x 41mm ( Wide ) x 80mm ( Deep ) 2.5 75.9 mm 40.6 mm 77.7 mm 80 mm Approvals C.E.
3. OPERATING INSTRUCTIONS 3.1 Hardware Set-up The TD236 Enhanced dual channel traffic 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.
Channel1 S6 S5 Off Off On Off Off On On On Channel 2 S4 S3 Off Off On Off Off On 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 by the switch settings.
3.3 Internal Link Selection WARNING - ONLY SERVICE PERSONNEL MAY OPEN THE UNIT TO CHANGE INTERNAL SETTINGS! There is one 3 way link located inside the TD236 Enhanced detector housing, which is used to alter the mode of operation of the detector. The link has been placed inside the unit to avoid incorrect operation due to selection by an unauthorised operator. For a description of the AB Logic mode refer to section 4.
4. PRINCIPLE 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 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.
4.3 Modes of Operation The TD236 Enhanced Detector may be configured for any one of the following modes: Presence Mode Pulse Mode AB Logic Presence Mode (Barrier Operation) AB Logic Pulse Mode (Counting Logic) 4.3.
(Pulse on un-detect is available on request. MOQ applies) 4.3.3 AB Logic Presence Mode (Barrier Operation) Internal link LK1 shorted from Pin 1 to Pin 2. In this mode switches 9 & 10 are ignored. AB LOGIC Presence Mode is a direction logic mode, and is capable of determining direction of travel of a vehicle. Two loops are laid in the direction of travel to provide the input for this mode.
Case 2: (AB LOGIC Presence Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Exits Loop 1 D - Vehicle Exits Loop 2 This is the correct forward operation for Presence AB Logic Case 3: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Exits Loop 2 C - Vehicle Enters Loop1 D - Vehicle Exits Loop 1 Typically caused by loops being too far apart or very small vehicles Case 4: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B
Case 5: (AB LOGIC Presence Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Starts to reverse D - Vehicle Exits Loop 2 E - Vehicle Exits Loop 1 This case should not happen but it does occasionally Case 6: (AB LOGIC Presence Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Enters Loop1 C - Vehicle Starts to reverse D - Vehicle Exits Loop 1 E - Vehicle Exits Loop 2 This case should not happen but it does occasionally 4.3.
If a vehicle enters Channel 1 Loop and then proceeds to Channel 2 Loop, a 150 ms pulse will be issued on Channel 1 relay output as the vehicle leaves Channel 1 Loop. If a vehicle now enters Channel 2 Loop and then proceeds to Channel 1 Loop, a 150 ms pulse will be issued on Channel 2 relay output as the vehicle leaves Channel 2 Loop.
Case 4: (AB LOGIC Pulse Mode) Reverse direction A - Vehicle Enters Loop2 B - Vehicle Enters Loop1 C - Vehicle Exits Loop 2 D - Vehicle Exits Loop 1 This is the correct reverse operation for Pulse AB Logic Case 5: (AB LOGIC Pulse Mode) Forward direction A - Vehicle Enters Loop1 B - Vehicle Enters Loop2 C - Vehicle Starts to reverse D - Vehicle Exits Loop 2 E - Vehicle Exits Loop 1 This case should not happen but it does occasionally Case 6: (AB LOGIC Pulse Mode) Reverse direction A - Vehicle Enters Loop2
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 by bearing the following constraints in mind, and strictly following the installation instructions.
5.2.2 Crosstalk When two or more loop configurations are in close proximity, the magnetic fields of one loop can overlap and disturb the field of another loop. This phenomena, is known as crosstalk, it can cause false detects and detector lock-up. Should the loops be connected to the same dual channel detector crosstalk will not occur, due to the fact that sequential polling of the loops takes place, resulting in only one loop being energised at a given time.
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.
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 1m +/- 2 m depending on road width 1m Min Distance Apart - 2 m (Road width = 2 m) - 3 m (Road width = 4 m) Max Distance Apart – No Limit 30 – 50 mm Figure 5.1 Adjacent loops connected to different detector modules 4 mm Figure 5.
6. CONFIGURATION WARNING: 7. 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 TD236 Enhanced detector models, on other models the pin assignments may change. WARNING: 8. 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.
6.2 TD236 Enhanced Detector: English 11 – PIN CONNECTOR WIRING for: 306FT0004 302FT0041 WIRING HARNESS WIRE COLOUR Red Black Blue Blue Yellow Yellow Grey Grey Green/Yellow White White 6.3 11 PIN Connector Pin No.
WARNING: 9. 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. 7. APPLICATIONS The TD236 Enhanced dual channel detectors 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.
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 Ch1 and/or Ch2 indicator is green. Turning off for half second periods. 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.
8.2 DU100 – Detector Diagnostic Unit The DU100 Diagnostic unit is a hand-held test instrument that has been designed to operate with the TD236 Enhanced detector to provide installation/service personnel with positive verification of the correct operation of the vehicle detector and its installation. 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.
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 TD236 Enhanced Detector can handle environmental conditions that can cause the frequency to drift up to at a rate of approximating 1% ∆L/L per minute.
8.3 Functional Test To test a detector, connect it to an inductive loop with a total inductance in the order of 300 micro-henries. (This may be achieved in the workshop by winding (x) turns of wire on a nonmetal 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 relevant channel OUTPUT LED will light up.
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.
APPENDIX B – INSTALLATION OUTDOORS Appendix B.1 IEC 60950-22:2005 – Outdoor cabinet If the TD236 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.
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.
POWER SUPPLY DETAILS: Nominal Voltage: _______ V ________ V AC or DC ? Minimum Voltage: _______ V Maximum Voltage: ______________ If AC then the Frequency _______ Hz LOOP DETAILS Channel 1 Size of loop: Channel 2 ____ m by ____ m Size of loop: ____ m by ____ m Shape of loop: _____________________ Shape of loop: _____________________ Number of Turns: _____ Number of Turns: _____ Size of wire used (mm2 or AWG) _____________ Size of wire used (mm2 or AWG) _____________ Type of wire insulation ___
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: _________________________________________________________________________________ ___________________________________________________________________ FEEDER CABLE and LOOP DETAILS Channel 1 Channel 2 Is the loop and feeder cable one continuous piece of wire or is there a joint between the loops and the f
READINGS FROM DU100 DIAGNOSTICS UNIT On arrival at site Time since last retune: ___________ days _____________ hours Reason for Retune 15 % ∆ L/L (typical): (Reset: manual or power failure, Short circuit, Open circuit, Indeterminate, Inductance change of greater than _______________________________________________ Channel 1 Channel 2 Frequency ______________ kHz Frequency ______________ kHz Loop Frequency Drift __________ % Loop Frequency Drift __________ % Sensitivity Min: ___________ %∆L/L Sensit
