Nortech DU 100 User manual

DU 100
USER MANUAL
NORTECH
All rights reserved
Copyright ©2000
Document No. : 895UM0001-02
Date of issue : May 2001
Nortech International (Pty) Ltd
P O Box 4099 32A Wiganthorpe Road
Willowton Hub Pietermaritzburg
Pietermaritzburg 3201 South Africa
3200 South Africa Reg. No. 98/10951
Tel: [phone] Int. Tel: [phone]
Fax: [phone] Int. Fax: [phone]
Email: m[email protected]a URL: www.nortech .co.za

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Table of Contents
1. INTRODUCTION............................................................................................ 3
2. TECHNICAL SPECIFICATIONS……………………………………….
3. OPERATIONAL INSTRUCTIONS.....................................................……
4
3.1 Intelligent Power Control...........................................................................….. 4
3.2 Display Contrast/Viewing Angle…………………………………………….
3.3 Data Acquisition……………………………………………………………..
4
5
3.4 DiagnosticOperation...................................................................................…. 5
4. OPERATIONAL MODES............................................................................. 6
4.1 Loop (Loop).................................................................................................... 6
4.2 Frequency (Freq)............................................................................................. 7
4.3 Sensitivity (Sens)............................................................................................. 8
4.4 Status (Stat)..................................................................................................... 9
4.5 Time (Time).................................................................................................... 10
4.6 Crosstalk (Xtlk)............................................................................................... 11
4.7 Built In Self Test (Test)................................................................................. 13
5. THEORY OF APPLICATIONS................................................................... 14
5.1 Loop Frequency and Inductance Change........................................................ 14
5.2 Loop Frequency Drift....................................................................................... 15
5.3 Detection Sensitivity........................................................................................ 16
5.4 Detector Status................................................................................................ 16
5.5 Historical Fault Data........................................................................................ 17
5.6 Crosstalk Prevention....................................................................................... 18
6. APPENDIX A – TYPICAL VALUES……………………………………… 19

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. INTRODUCTION
The Nortech DU100 Diagnostic Unit is a hand held test instrument capable of
providing installation/service personnel with positive verification of the correct
operation of a vehicle detector installation. It may only be utilised in conjunction with
diagnostic compatible vehicle detector products from Nortech Industries.
Current operational and historical data are transferred form the vehicle detector to the
DU100 by means of an optical link. Data transmission form the vehicle detector unit
occurs continuously so no service disruption is necessary. Received data is verified
for integrity by means of a cyclic redundancy check (CRC), processes, and then
displayed on a LCD screen.
1.1 The DU100 can be used with the following inductive loop detectors;
PD130, PD139 (excluding I²C models), PD140, PD230, PD239 (excluding I²C models),
PD240, TD136, TD136 Enhanced, TD250, TD250L, TD250LS, TD252.
1.2 Related Documents
“Inductive Loop Vehicle Detection” Document No. MKT01.
1.3 This manual covers the following units;
895FT0001 – DU100 Diagnostic unit – English
895FT0002 – DU100 Diagnostic unit – German
895FT0003 – DU100 Diagnostic unit – French
895FT0004 – DU100 Diagnostic unit – Italian
895FT0005 – DU100 Diagnostic unit - Spanish

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2. DU100 TECHNICAL SPECIFICATIONS
Frequency Resolution 1Hz
Sensitivity Resolution 0.001 % ∆L/L
Display Element 2 line x 16 Character LCD
Display Contrast Adjustable via multi-function keyswitch
Keyswitch 1 x Mode Selection, 1 x Power-on/execute
Auto Power off 2 Minutes after last operation
Optical Receiver Detachable wand with photo-diode
Power Supply 4 X 1.5V AA dry cell
Battery Life > 10 hours continuous
Operating Temperature Range 0°C to + 50 °C
Dimensions 200mm (h) x 100mm (w) x 40mm (d)
Weight 380gms including batteries
3. OPERATIONAL INSTRUCTIONS
3.1 Intelligent Power Control
The DU100 Diagnostic Unit may be powered-up by pressing either the SELECT or
ENTER key. The unit may be turned off by the simultaneous pressing of both keys.
Automatic power-down will occur after the unit has been left unused after two
minutes.
3.2 Display Contrast/Viewing Angle
The display contrast may be adjusted by holding down either key: SELECT for
lighter, ENTER for darker.

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3.3 Data Acquisition
Data is extracted form the vehicle detector under test by means of a unidirectional
optical link. An optical wand ( normally located in the zippered side pocket of the
DU100 bag) should be plugged into the jack socket at the top of the unit and the unit
should be powered-up. When the optical wand is brought into close proximity of the
red “RUN LED” of the detector under test, the DU100 will emit audible beeps as it
acquires data. A single beep received indicates that sufficient data has been received
and the optical link may be broken at this stage to enable operator interrogation.
Alternatively, the optical link may be maintained in order to facilitate continuous data
transfer and updating.
3.4 Diagnostic Operation
After pressing any button and powering the diagnostic unit, information can be
acquired ( indicated by an audible beep ). The DU100 will display the type of the
vehicle detector under test ( e.g. PD130 ) and its software release version on the top
line of the two display screen. The lower line will consist of a cyclical menu. Each
time the SELECT key [¤] is pressed, the cursor will jump to the next menu option.
Menu options, once selected, are activated by means of the ENTER key[ ↵].